It protects the major organs of the body.

It removes body waste like urea and urine

It is the major organ of the human body which process information and sends instruction.

It pumps blood, allowing the distribution of nutrients in all parts of the body.

It is where the final digestion and absorption of food takes place

It controls thoughts, memory and other organs of the body

The organ in the human body that absorbs water and electrolytes

The filtering units of the kidneys are called

The organs that filter blood and produces urine are called

The organ in the digestive system that temporarily stores food.

Birds have beaks that are shaped to suit their food-getting activities. Which of the birds below wats fish?

Which of these have mouth parts used for sucking?

Why is snake covered with dry scale?

An animal has big hind legs. Which of the following movement can it do?

Why does a bear in a cold country has thicker fur than bears living in warm places?

Some plants such as cacti and other plants in the desert can grow in dry soil for long period of time. They withstand the heat of the sun. What structure helps them respond to and survive in their environment?

Bulbs are underground leaves that store food. Which of the following plants grow from bulbs?

What do you call spines and thorns of some plants which they use to protect themselves from danger?

Mangrove seeds germinate while attached to the tree. How does this help the plant in its muddy habitat?

What characteristics make the water hyacinth float on water?

Which animal has three stages in its growth and development?

The caterpillar transforms into an adult called

The first stage of complete metamorphosis is called __________

The third stage of a fly's life cycle is called

Animal with 4 life cycle stages has _______ metamorphosis.

All the living organisms that inhibit an environment are called

What will happen if blue whales are removed from their natura habitat?

What do humans and animals give off that is useful to plants?

The removal of which of the following organisms would have the biggest impact on marine ecosystem?

It is the movement of water from the atmosphere to the Earth and back to the atmosphere.

The kind of interaction in which both organisms benefit from each other is called __________

The kind of interaction in which one organisms kills smaller organism for food is called _____

___________ is the interaction among organisms where one benefits while the other is not benefited or harmed

An interaction in which two organisms compete for survival is called __________

A symbiotic relationship where one organism depends on the host for food, protection and reproduction is called _____

Which describes the role of producers in the ecosystem?

It is any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms.

A stable, mature community that undergoes little or no change in species is called ____________

It is the combination of an organism's habitat and its role in the habitat.

Why are coral reefs important?

Which female reproductive organ releases egg or ovum?

Which of the following is not part of the male reproductive system?

What tubule transports both urine and semen?

The following are changes in girls during puberty except __________

The fertilized egg in the body of a female normally develops in the _______________

What period of life do a girl is capable of reproduction?

The stage in the menstrual cycle usually lasting from three to five days when fertilization does not occur.

The first menstrual flow is called ___________

How long does menstruation usually last?

What is the stage in a woman when mentrual cycle stops and is no longer capable of conceiving a baby?

Which of the following animals reproduce in large number?

The process of creating offspring with the participation of sperm cell from male parent and egg cell from the female parent is called ________

Which of the followng are forms of asexual reproduction?

A form of asexual reproduction in which a new animals is produced through outgrowth parts of the parent.

The breaking of an individual into parts followed by regeneration is called _________

When is a flower considered a complete flower?

A collection of sepals is called __________

It is the enlarged part of a flower stalk where the flower or group of flowers are attached or grows

What is the most observable part of the flower in which people normally appreciates?

Petals that are in group or by set are called ___________

What is the male reproductive organ of a flower?

The female part of the flower which consist of several parts such as style and stigma

The elongated part of the flower that supports and connects the stigma to the ovary.

The act of transferring pollen grains from male anther of a flower to the female stigma is called

____________ occurs when the pollen grain is transferred from the anther of a flower to the stigma of the same flower, or another flower on the same plant

What type of pollination requires two individual plants of the same species?

These are agents for the transfer of pollen grains from a flower to another flower of either the same plant or different plants of the same species.

What are the two major groups of flowering plants?

Plants with netted veins and with two cotyledons in its embryo are called

Which of the following are monocotyledonous plants?

Study of the interactions of living organisms with one another and with nonliving environment is called ____________

Partly enclosed coastal area at the mouth of the river where its freshwater mixes with salty seawater.

Which of the following grow rapidly on estuaries by absorbing the rich nutrients of the water?

IT is an area of shoreline between low and high tides

Most of the food for aquatic ecosystem is produced by ________________

Which of the following may harm the estuaries and intertidal zones?

Which of the following is a nonliving thing affected by human activities

Which of the following does not disrupt the balance of intertidal and estuary ecosystems?

Which of the following disrupt the balance of intertidal and estuary ecosystems?

The following are actions or activities that help protect and conserve the estuaries and intertidal zones except _______

It is a hollow organ that holds and squeezes the food while it is being mixed with gastric juices

The spongy substance found in the center of the bones that manufactures red blood cells, white blood cells, and platelets

Is is the body's largest organ that covers entire outside of the body, forming a protective barrier against pathogens and injuries from the environment.

What is the smooth tissue that protects the end of bones at the joints by preventing them from rubbing together?

It is part of the brain that coordinates muscle movement and maintains posture and balance

What two systems provide form, stability and movement to the body?

What system consists of the skin, hair, and nails which protects the body from various kinds of threats?

It is a community of living organisms together with the non-living component of their environment.

The following are abiotic factors except _______