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Animals: Insect, Classification & Taxonomy Vocabulary
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Classification of plants • Plants can be classified as cultivated and wild plants. • Both cultivated and wild plants are very useful to people, animals and the environment. 1. Cultivated plants: • Cultivated plants are plants grown by people for selling. • They can be grown in the field, vegetable garden, home garden and orchard. Classification of plants 2. Wild plants Wild plants are plants that grow on their own outside the garden, orchard or field. They have many uses such as: • Food for people and animals • Shelter • Source of fuel in form of firewood. • Examples include, grasses, msasa, yellow wood, mahogany, mopane Plant Nutrition • The presence of plant nutrients in the soil make them grow well. • The three major plant nutrients are nitrogen, phosphorus and potassium. Sources of plant nutrients • The source for plant nutrients are grouped into organic and inorganic sources. Organic sources of plant nutrients • These are found in nature. • They are natural materials such, decayed plant and animal matter which include: • Animal manure from cattle, sheep, goats, poultry and pigs. • Green manure • Legume crops like beans, peas and groundnuts. • Humus • These material sources may also be called natural fertilizers. Inorganic sources of plant nutrients • These are sources of plant nutrients made by people in industries. They include: • Compound fertilizers like compound A, B, C and D. • These have two or more nutrients. • Straight fertilizers like ammonium nitrate, single super phosphate and urea. • A straight fertilizer supplies a single or more nutrient to the crop. A straight fertilizer A Compound fertilizer Sources of N,P,K • Ammonium nitrate and Urea- contain nitrogen Double super Phosphate, Single super phosphate-contain phosphorus • Muriate of Potash contains Potassium 2 . Compound fertilisers -have two or three of the three major plant nutrients (N.P.K). N-nitrogen P-phosphorus K-potassium Examples Compound D Wednesday 17 May 2023 Revision exercise (Plant nutrition) 1 .Name the 3 plant nutrients needed by plants. 2. What are the 2 groups of plant nutrients sources? 3. Give 3 examples of organic sources of plant nutrients. 4. What is a straight fertilizer? 5. Compound fertilizer supplies ……………or ………………. Nutrients. Vegetable crops • A vegetable is any part of a plant that is eaten by humans as food part of a meal. • Vegetables are grouped and named according to the part that is eaten. • These are leaf, root, fruit, flower, bulb, tuber and legume vegetables. Leaf vegetables Types of veg Legume etable cropsvegetables Fruit vegetables Root, bulb and tuber Flower vegetables Cabbage Peas Tomato Root: carrots Cauliflower Rape Green beans Pepper Parsnip broccoli Spinach Melons Beetroot Tsunga Cucumber Bulb: onion Lettuce Squash Garlic kale Egg plant Leek chillies Tuber: Irish potato Wednesday 31 May 2023 Vegetable crops 1. What is a vegetable? 2. Which one is not a vegetable from the list below? a. Covo B. cabbage C. wheat D. tomato 3. Choose a vegetable which is not a fruit vegetable. a. tomato B. pepper C. kale D. egg plant 4. From which pair of vegetables do we eat the flower? A. cauliflower and garlic B. broccoli and cauliflower C. broccoli and rape D. cauliflower and pepper 5. Give one example of a vegetable belonging to each of the following groups. a. root b. legume c. bulb 6. Name any 5 groups of vegetable classification according to the parts eaten. Growing leaf vegetables • Although there are many types of vegetables, the leaf, fruit and bulb vegetables are widely grown. • Leaf vegetables form the greater part of vegetable crops. • Leaf vegetables belong to a family called brassica. • Brassicas include cabbages, lettuce, spinach, covo and many others. • Each brassica family has got its own varieties called cultivar. • They usually grow under the same climatic conditions and are affected by the same pests and diseases. • The selection of a variety depends on the following : The intended use of the vegetable, for example, salad, stew or snacks. Days taken to mature. Disease resistant Season of the year Seedbed preparation • Brassica vegetables are usually raised in seedbeds. • The seedbeds are prepared by: • Marking the position of the bed 1 meter in width by any length using a tape measure, hammer and pegs. • Digging a seedbed to a depth of 25 to 30cm using a hoe. • Breaking lumps of soil using a garden rake. Soil requirements • Brassicas need: • Well drained soils. • Fertile soil for good growth • Slightly acidic soils (pH 5.5-6) Climatic requirements • Brassicas need cool to warm temperatures. • Very low temperatures cause cabbages to flower which is called bolting. • Brassicas can be grown throughout the year. Seedbed preparation • Brassica seedlings are usually raised in seedbeds. • A seedbed is prepared by: Marking the position of the bed 1 metre in width by any length using a tape measure, hammer and pegs. Digging a seedbed to depth of 25 to 30 cm using a hoe. Breaking lumps of soil using a garden rake. This is done in order to have a fine tilth and improve soil to seed contact. Making ridges that a 15cm high. Apply 3 to 5kg/m² of well decomposed manure. 60 to 100g/m² of compound fertilizer can be added into the soil. Management of vegetable crops • After transplanting the seedlings, the seedlings need to be looked after. (a)Controlling weeds: all vegetables must be kept weed free. • This is done either by hand pulling weeds or shallow cultivation using a hand fork. (b) Pest control: common pests that affect the brassicas are aphids and diamond black moth larva. • Aphids are small green insects that suck the juice from the leaves leaving them with curls. • They are controlled by spraying malathion using the instructions on the label. (c) Disease control: bacterial diseases are common in brassicas. • Common diseases are black rot and soft rot, especially in cabbages. • These are controlled by: Crop rotation Early planting Planting resistant cultivars (d) Top dressing: brassicas are top dressed using Ammonium Nitrate at a rate of 2.5g per plant. • Top dressing is usually done 3 or 4 weeks after germination. FIELD CROPS • Field crops are crops that are grown on a large piece of land. • Example of field crops: Maize Cotton Groundnuts Roundnuts Wheat Sunflower Tobacco Sugar cane Tea Coffee Soya beans sorghum Classification of field • Field crops can be classified according to use such crops cereal, fibre, sugar and oil. 1. Cereal crops: • A cereal is a grass grown for its edible seeds. • They are also known as grain crops. • The major cereal crops are maize, wheat, rice, barley, sorghum and millet. 2 . fiber crops : • these are crops which are grown for their fiber and are used in making textiles, ropes and rugs. • Important fiber crops are cotton, flax and sisal 3. Oil seed crops: • These crops are grown for the purpose of extracting oil from their seed. • The main oil seed crops are groundnuts, sunflower, soyabean and cotton seed. 4 . Sugar crops : • Sugar crops include sugarcane,Orchard / fruit trees Importance of fruit trees • Fruit trees are important for the following uses: They are a source of food, they produce fruits Some are used for making medicines Others provide shade and can also act as wind breakers. Those with beautiful flowers are very decorative. They contain vitamins which means they have nutritional value. Classification of fruit trees • Fruit trees are classified as indigenous and exotic. Indigenous fruit trees • are those that natural grow in a country. • They take longer to grow. • Examples of indigenous fruit trees are: English name Shona Name Snot apple Water berry Red ivory Fig Monkey orange Wild custard apple Mobola fruit Exotic fruit trees • These are trees that were brought from other countries. • They are commercially grown in orchards. • Common exotic fruit trees include: • Exotic fruit trees grow faster than indigenous. Ornamental horticulture • It deals with the growing of decorative plants. • Decorative plants are collectively called ornamental plants. • They include trees, shrubs, flowers and lawn grasses. Importance of ornamental plants They beautify the environment. Flowers often produce a pleasing fragrance. Flowers attract insects like bees that are responsible for pollination. Plants produce oxygen that we need for breathing. • Some are used for making medicines. • Lawn grasses prevent soil erosion. • Plants provide shelter for birds and insects. Classification of ornamental plants • There are four classes of ornamental plants. Trees Shrubs Flowers Lawn Trees: • Ornamental trees are very useful as decorative plants. • This is because most of these trees produce beautiful flowers and some are ever green. • Examples of decorative trees include flamboyant, jacaranda, pines, Cyprus. Shrubs: • A shrub is a woody plant with many branches but smaller than a tree. • Some of them are ornamentals because they produce beautiful flowers. • Others can be cut into decorative shapes. • The golden duranta is good example because it can be cut into nice shapes. • The bougainvillea is another example of a decorative plant because: It can act as a climbing plant. It produces decorative flowers. It can also be cut into any shape using a hedge shear. Flowers: • Flowers have the following functions: They are used for decorations at weddings, hotels and parties. They are used as an expression of love and appreciation such as valentine’s day and get well soon messages. They are useful in bee farming called apiculture as they are a source of nectar used for making honey. Flowers produce a pleasant fragrance used in the production of soaps and scents for perfumes, deodorant and lotions. Lawn: • A lawn is an area of grass that is kept cut short and is usually part of someone's garden or backyard, or part of a park. • Some lawn grasses grown in Zimbabwe are Durban, kikuyu, couch and buffalo lawn. • They prevent soil erosion. • They also provide a comfortable outdoor resting place. Forestry Importance of trees • Trees are important to us and animals. • The Forestry Commission is responsible for taking care of trees in Zimbabwe. • Trees are also important to the environment because: They are a source of fuel in the form of firewood. They are used for making most of the furniture we use. Most medicines come from both exotic and indigenous trees, for example pine trees and gum trees are used for making cough medicines. Trees provide browsing animals like the kudu and giraffe with food. Fruits from both exotic and indigenous fruit trees are a rich source of vitamins Trees give out oxygen which we need for breathing. Trees provide timber that can be used for roofing. • Trees are grouped according to where they come from. • The groups are indigenous and exotic. 1 . Indigenous trees : • These are local trees that have always been grown in their country. Shona name English name Mutohwe Snot apple Mususu Yellow wood Mubvamaropa Blood wood Muuyu Baobab Muonde Fig tree Musasa msasa Characteristics of indigenous trees take longer to mature Do not produce straight poles Grow on their own Hard wood 2 .Exotic trees : • These are trees that have been brought from another country to be grown in Zimbabwe. Characteristics of exotic trees They are brought in a country from another country. Grow very fast. Have soft woods Usually grow straight Usually grown in orchards and plantations Common exotic trees in Zimbabwe are: Gum trees Pine trees Wattle Cyprus Date palm Mango Apple pawpaw Causes of plant damage • plant damage is when cultivated crops are kept from normal growth that leads to reduced yields. • plant damage is caused by both living and non living things. • Some of the common causes of crop damage are: (a)Pests • These are living organisms that cause physical damage to crops. • Examples of pests are weevils, army worm, aphids, cutworms and locusts. (b) Diseases • Plant diseases are caused by living organisms called pathogens. • These pathogens infest the plant and take away nutrients. • Fruit rot and bacteria spot are some of the examples of plant diseases. (c) Weeds • these are plant which grow where they are not wanted. • For example if black jack grows in a groundnut field, it is a weed. • Weeds compete for nutrients with cultivated plants. (d) Very high temperatures • High temperatures may cause crops to wither. • High temperatures may also lead to lightning and fires. • This can burn up crops. ( e) Frost • Frost damages crops in winter. • Tomatoes, potatoes, and beans are easily damaged by frost. (f) Drought • drought is when there is no rainfall in a season where it supposed to be raining. • It is one of the most serious forms of crop damage. • Plants wither and die if there is no rainfall. ( g) Animals • Wild animals like baboons often eat maize crops before they mature. • Birds also are a problem to crops like sorghum. Signs of plant damage • There are various signs that show plant damage. • Some can be corrected but some lead to total loss. • Some signs of plant damage include: Lodged plants Flowers and small fruits blown to the ground Dull leaf color Wilted plants Stunted growthWonders of Nature Introduction. The world is full of interesting animals. Some animals look strange or have special skills. Let's look at some of these wonders of nature. Archerfish. Archerfish spit water at bugs. The bugs fall into the water, where the archerfish catch and eat them. Trap-Door Spider. The trap-door spider lives in a tunnel in the ground. Its home has a hidden door made of silk and dirt. The spider hides in its tunnel to hunt. Beaver. Beavers chew through tree trunks. They make dams out of trees, mud, and stones. Chameleon. Chameleons change color to hide themselves. They even change color to show how they feel. Flying Dragon. Flying dragons have skin on their sides that opens like wings. They jump and glide from tree to tree. Leaf Insect. The body parts of leaf insects look just like leaves. These animals blend in well with real leaves on trees. Leaf-Rolling Weevil. The female leaf-rolling weevil rolls a leaf into a cone. She lays her eggs inside the cone. The leaf hides and protects her eggs. Praying Mantis. The praying mantis holds its front legs in a praying position. A mantis has five eyes to help it hunt for food. Mole. Moles dig tunnels to find and eat worms. These animals have tiny eyes, but they are not blind. Sea Dragon. Sea dragons are small fish. They look like ocean plants. Their leafy parts help them catch food and hide from enemies. Conclusion. Interesting animals come in many shapes and sizes. They are all wonders of nature. Accidents are unexpected events or happening at home, school, on the road or at work which can lead to injuries or death. It can cause pain, sorrow, discomfort or deformation of the body. Some accidents are caused by mistakes, stubbornness, carelessness or disobedience. The accident at home is called domestic accident. TYPES OF ACCIDENT 1) BURNS: These are caused by hot objects like hot iron. Burns could be caused through fire incidents. 2) BITES: These are caused by animals such as snakes, dogs, insects etc. Some insect’s bites may lead to itching of the spot and its surroundings. This may later lead to a serious discomfort. 3) BRUISES: These are marks on the skin which results when one falls of hit by a person in a fight. This action causes the swelling of the skin. 4) SCALDS: Scalds are caused by hot water, hot oil or acid if it mistakenly touches or pours on the body. 5) CUTS: These are caused by sharp objects such as knife, blades, scissors. 6) ROAD ACCIDENTS: These are caused by Reckless driving, bad roads(potholes). 7) AIR AND SEA ACCIDENTS: These are mainly caused by poor weather and engine failure. It can lead to materials and human beings lost. 8) RAIL ACCIDENTS: These are caused by bad railways and careless crossing by motorists. THE FOLLOWING ARE THE WAYS OF PREVENTING ACCIDENTS. 1. Do not play near an open fire or flame. 2. Do not run up the staircase but walk smartly. 3. Do not dare a strange dog. 4. Do not play with sharp objects likes blades, knives and scissors. 5. Do not play with harmful insects. 6. Avoid rough plays to prevent bruises and wounds and other forms of accidents. 7. Remove all objects that can cause a fall on the way. 8. Wear dry rubber slippers before operating an electrical appliance like Television, refrigerator and pressing iron. 9. Always obey your parents’ instructions. 10. Always keep the floor clean at all time. Some Arctic Dinos Lived in Herds
By Sid Perkins
Just as interesting, however, is how this was discovered. Scientists didn’t look at a single fossil bone.
Instead, they analyzed a large number of preserved footprints on a mountainside located toward the
southern end of central Alaska.
Anthony Fiorillo works at the Perot Museum of Nature and Science in Dallas, Texas. As a vertebrate
paleontologist, he studies the fossils of creatures with backbones. In 2007, he was part of a research
team exploring Denali National Park. “We rounded the corner and there they were,” he recalls.
Thousands of footprints had been preserved in stone. “It was amazing.”
Dinosaurs died out more than 65 million years ago (not
counting birds, their modern-day relatives). So, it’s a bit
surprising that scientists know so much about these
ancient creatures. Now, a new study reveals that a certain
type of duckbilled dinosaur lived in the Arctic year-round.
These animals also traveled in herds that included many
age groups, they find. The creatures even appear to have
gone through a “teenage growth spurt.”
Those tracks pepper a steep patch of exposed rock about twice as
long as a football field and up to 60 meters (roughly 200 feet) wide.
They sit at least 160 kilometers (100 miles) north of the Gulf of Alaska.
Between 69 million and 72 million years ago, that now-rocky material
was muddy sediment on a floodplain near a seacoast, Fiorillo explains.
The hadrosaurs walked across the squishy mud. Later, the footprints
they left turned to stone.
Previous studies suggested adult duckbills took care of their young,
says Fiorillo. The new evidence that these dinosaurs truly traveled in
herds with multiple age groups confirms that parents cared for their
young well beyond the time they left the nest, his team concludes. The
researchers published their findings June 30 in Geology.
© Science News for Students
Thousands of tracks cover this
rocky mountainside in Alaska’s
Denali National Park. They
provide a wealth of information
about the size, age and lifestyle
of certain dinosaurs.
COURTESY OF PEROT MUSEUM OF
NATURE AND SCIENCE
EVIDENCE FOR HERDS O F DINOSAURS
Small meat-eating dinosaurs called theropods had left behind a few of the tracks that Fiorillo’s team
found in Denali. Birds had left some others. But the vast majority came from creatures called
hadrosaurs. These large plant-eating duckbilled dinosaurs had been quite common during the
Cretaceous Period. That helps explain one of their nicknames: “cattle of the Cretaceous.”
For the new study, the researchers focused only on the hadrosaur tracks. More than half of the
footprints were preserved so well that they had clear impressions of the skin on the dinosaurs’ feet.
Most tracks had a similar level of preservation. That suggests all were probably left within a short
period. Other fossils in the nearby rocks, including insect burrows, suggest these hadrosaurs had left
their footprints during the summer. These are trace fossils — evidence of ancient life other than a
preserved carcass or bone.
At the time these dinosaurs lived, Fiorillio says, the average temperature in the warmest months was
between 10° and 12° Celsius (50° and 54° Fahrenheit). That’s about what conditions are like today
along the border between Canada and the lower 48 U.S. states, he notes.
The team measured a large sample of the duckbills’ footprints. They fell into four distinct size ranges.
The largest tracks, presumably made by adults, measured about 64 centimeters (25 inches) across. The
smallest tracks, 8 centimeters (3 inches) wide, were likely left by young duckbills. They would have
been no more than a year old. Tracks of two other size groups were probably made by juveniles and
near-adults.
These data suggest the community of hadrosaurs included four different age groups.
© Science News for Students
A hadrosaur footprint made
roughly 70 million years ago. For
scale, the long blue bar at right is
10 centimeters long; each small
blue or white bar measures 1
centimeter.
COURTESY OF PEROT MUSEUM OF NATURE
AND SCIENCE
© Science News for Students
THESE DINOSAURS DIDN’T MIGRATE
About 84 percent of the tracks sampled for the new study had been left by older hadrosaurs — adults or
near-adults. Roughly 13 percent came from the youngest members of the herd. And a mere 3 percent
came from herd members considered to be juveniles, says Fiorillo. The rarity of tracks by these tweens
suggests that the young of this species had a rapid growth spurt. If true, they would have spent relatively
little time at this vulnerable size — and therefore left very few tracks.
“What’s really neat is how many small tracks there are,” notes Anthony Martin. An ichnologist — or
expert in trace fossils — he works at Emory University in Atlanta, Ga.
Other scientists had analyzed fossil bones from duckbills. These studies had hinted that the equivalent of
adolescent hadrosaurs would have experienced growth spurts. But the new findings are “the best
evidence that I’ve seen,” says Eric Snively. He’s a vertebrate paleontologist at the University of Wisconsin-
La Crosse. “This is a great study,” he adds, “and further evidence that juvenile hadrosaurs grew up in an
eye-blink.”
Also previously, researchers had proposed that Arctic dinosaurs migrated farther south for the winter.
That’s because even if the region was much warmer than it is today, nights in the high Arctic would have
been 24 hours long. So, with no sunshine for several months, Alaska would have had long periods of very
bleak, chilly weather.
But finding juveniles in the herd
strongly suggests that these
dinosaurs remained in the Arctic all
year. That’s because adolescents and
preadolescents wouldn’t have had
the strength or stamina to make
those long treks, Fiorillo maintains.
Field work is often harsh. Paleontologists studying the dinosaur
footprints here on an Alaskan mountainside sometimes worked
in cold and fog.
COURTESY OF PEROT MUSEUM OF NATURE AND SCIENCE
© Science News for Students
The presence of very young dinosaurs might have been expected, he notes: If this were a nesting region,
the babies would have hatched sometime just before summer. And remember, that’s when these tracks
were left. But that wouldn’t explain the juveniles, he says.
The team’s findings “suggest that these dinosaurs were overwintering in Alaska somehow,” says Snively.
At the time, the average temperature in the region remained above freezing even during the winter, he
notes. But, he adds, “this study raises interesting issues about how the dinosaurs could live in the region
when it was pretty dark for several months at a time.”Create vocab quiz for the following vocab: eco hotel (noun) a hotel that is made to minimise impact on the natural environment water sports (noun) sports that take place on or in water windsurfing (noun) a sport in which you sail across water by standing on a board and holding onto a large sail waterskiing (noun) a sport in which you are pulled along the surface of the water by a boat, while balancing on a pair of skis first-aid kit (noun) a box or bag containing basic medical equipment day trip (noun) a visit to a place in which you go there and come back on the same day picnic basket (noun) a light container made of thin strips of wood, metal or plastic, that holds an informal meal of sandwiches, etc. for eating outside roller skating (noun) the activity of moving along the ground using roller skates ice skating (noun) the sport or activity of moving on ice using ice skates theme park (noun) a large permanent area for public entertainment, with entertaining activities and big machines to ride on or play games on, restaurants, etc. national park (noun) an area of a country that is protected by the government because of its natural beauty or because it has a special history campsite (noun) an area where people stay in tents for a holiday hot spring (noun) a place where hot water naturally flows out from the ground, typically heated by underground volcanic activity insect repellent (noun) a substance used to repel very small animals such as mosquitos tennis court (noun) a rectangular area marked with lines on which tennis is played swimming pool (noun) an area of water that has been made for people to swim in beach umbrella (noun) a device for protection against the sun sightseeing tour (noun) a tour of a place, visiting interesting places boat trip (noun) a journey taken in a small vehicle travelling on water• Landscape management A landscape is the evident factor of a land, its landforms, and the combined features of natural or artificial elements. Landscape management includes maintenance and integration of physical elements, water bodies, land cover, indigenous vegetation, human elements, such as structures and buildings, and climatic conditions. • Soil Preparation In the list of farming practices, soil preparation is placed second because of its importance for seed germination. Before a crop is grown, the soil is leveled and plowed a bit deeply to prepare it for the sowing of seed. After plowing, the soil loosens and develops proper aeration in the soil. • Sowing Seed selection from good quality varieties is the principal step of sowing. After preparing the soil, seeds are spread over the field, called sowing. Manual and mechanical (seeders) methods of sowing can be used. Some plants, such as rice, are first grown as seedlings in a small space and later transplanted to fields. • Manuring Plants need nutrients for their growth and fruit/seed production. Therefore, nutrients must be consumed at even intervals. Fertilization is the stage at which nutrients are introduced into the lands. These nutrients can be natural manure or artificial fertilizers. Decomposed products and waste of plants and animals are used as manure because of their nutrient richness. • Irrigation Irrigation means supplying water to plants. Water sources can be dams, ponds, wells, canals, etc. Excessive irrigation can damage crops and lead to waterlogging. The irrigation interval and frequency must be monitored, as they vary with the crop. • Weeding Unwanted plants grown alongside field crops are known as weeds. These plants are removed with the help of weed killers (weedicides), manually plucking with hands. Several weeds can be removed with better soil preparation techniques. • Integrated Pest Management • IPM – Integrated Pest Management, is a successful and ecologically sensitive technique to manage pests using combined sustainable practices. IPM is a series of methods including pest assessment, decision, and control techniques • Integrating Crops and Livestock Integrating crops and livestock increases the diversity and environmental sustainability of both sectors. In the meantime, it will offer opportunities to increase overall agricultural production and profitability. • Storage/Selling In the end steps of agricultural practices, the resulting grains are stored in warehouses for later use and selling purposes. Therefore, better plant protection methods must be used to protect grains from rodents and insect pests. The stores should be cleaned, dried, well-fumigated, etc., before storing grains. • Harvesting Among steps of farming practices, harvesting needs significant care otherwise it will result in yield reduction. When the crop reaches maturity, the cutting starts, and the produce will be stored in a dry place. This process is known as harvesting. After harvesting, manual or mechanical thrashing is done to separate grains from the plants.Lesson 12B wild animals and insects 1