Question

question 87
1 point
autotrophs are useful because.
a they remove carbon dioxide from the air.
b they add oxygen to the air.
c they are a source of food for humans.
d some are a potential source of fuel.
e all of the above,

question 88
1 point
an organism that can carry out photosynthesis is.
a a heterotroph.
b usually found on the land.
c an autotroph.
d a fungus.
e always a plant.

Explanation:

Question 87

Autotrophs perform photosynthesis. During photosynthesis, they take in carbon dioxide (\(CO_2\)) from the air (A is correct). They release oxygen (\(O_2\)) as a by - product (B is correct). Many autotrophs (like plants) are a source of food for humans (C is correct). Some autotrophs (such as certain algae) are being explored as a potential source of bio - fuel (D is correct). Since A, B, C, and D are all correct, E (All of the above) is the answer.

A heterotroph cannot perform photosynthesis (A is incorrect). Photosynthetic organisms can be found in water (like algae) as well as on land (B is incorrect). An autotroph is an organism that can produce its own food, and many autotrophs (like plants and some bacteria) perform photosynthesis (C is correct). Fungi are heterotrophs (they cannot perform photosynthesis, D is incorrect). Not all photosynthetic organisms are plants (e.g., cyanobacteria are photosynthetic but are prokaryotes, not plants, E is incorrect).

Answer:

E. All of the above

Question 88