Question 1

Autotrophs are plants that :

Accepted Answer

are chlorophyllic and undergo photosynthesis to make their own food

Answer

do not undergo photosynthesis

Answer

are non-cholorphyllic

Answer

obtain materials mainly form substances manufactured by other organisms

Question 2

Knop's liquid :

Accepted Answer

ensures the complete growth and development of a chlorophillic plant even without soil

Answer

is not important for growth and development of green plants

Answer

is vital for the development  of fungi

Question 3

Iodine tests are used to test for:

Accepted Answer

starch in plants and food

Answer

carbon dioxide gas

Answer

Reducing sugars

Answer

proteins

Question 4

When testing a leaf for starch, the leaf must be boiled in alcohol as seen in the picture above. Explain why is this step important?

Accepted Answer

to dissolve the chlorophyll

Answer

to help the plant start photosynthesis reaction

Answer

for other reasons

Answer

to dissolve the starch

Question 5

Photosynthesis is a chemical reaction that:

Accepted Answer

uses water and carbon dioxide gas in presence of sunlight to produce oxygen gas and glucose

Answer

uses oxygen gas and glucose  in presence of sunlight to produce water and carbon dioxide gas

Answer

uses minerals and glucose to produce oxygen and starch

Question 6

The following organelle is called:

Accepted Answer

chloroplast

Answer

mitochondria

Answer

chlorophyll

Answer

vacuole

Question 7

The two main functions of chlorophyll are:

Accepted Answer

absorbs sunlight energy and give the plant its green color

Answer

absorbs carbon dioxide gas and release oxygen gas

Answer

absorbs sunlight and carbon dioxide gas

Question 8

The first organic molecules synthesized during  photosynthesis in  Chlorophyllic  plants are:

Accepted Answer

carbohydrates

Answer

lipids

Answer

proteins

Question 9

Which of the following plants will show a dark blue color when tested with iodine?

Accepted Answer

plant 1

Answer

none of the plants

Answer

plant 2

Question 10

The experiment in the figure studies the importance of:

Accepted Answer

light factor in photosynthesis

Answer

water factor in photosynthesis

Answer

carbon dioxide gas factor in photosynthesis

Question 11

Propose a title for the graph above.

Accepted Answer

The variation of oxygen gas produced (in ml) as a function of time( in hours) when being exposed to light and darkness.

Answer

The variation of time ( in hours)as a function  oxygen gas produced (in ml)  when being exposed to light and darkness.

Answer

The variation of oxygen gas produced (in ml) as a function of exposure to light and darkness.

Question 12

The decrease in volume of oxygen gas in obscurity( darkness) shows that:

Accepted Answer

The pant is undergoing cellular respiration and absorbing oxygen gas

Answer

The pant is undergoing cellular respiration and releasing oxygen gas

Answer

The plant is undergoing photosynthesis and and absorbing oxygen gas

Question 13

The increase in the volume of oxygen gas in light shows that:

Accepted Answer

The pant is undergoing photosynthesis   and releasing oxygen gas

Answer

The pant is undergoing cellular respiration and releasing oxygen gas

Answer

The pant is undergoing cellular respiration and absorbing oxygen gas

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