Question

practice 1
answer the following questions about photosynthesis. darken the circle or circles that correspond to your answer choice(s).

1. which of the following organisms can convert sunlight energy into chemical energy? choose all that apply.

a an oak tree
b a butterfly
c a mushroom
d a dog
e a tomato plant
f brewer’s yeast

1. which one of the following characteristics could describe a heterotroph?

a can convert sunlight energy into chemical energy
b contains pigments that capture the sun’s energy
c uses enzymes, h₂o, and co₂ to make glucose
d obtains energy by consuming glucose

1. which of the following shows the correct net equation for photosynthesis?

a 6co₂ + 6h₂o + 6o₂ + sunlight → c₆h₁₂o₆
b 6co₂ + 6h₂o + sunlight → c₆h₁₂o₆ + 6o₂
c 6h₂o + 6h₂ + sunlight → c₆h₁₂o₆
d 6co₂ + 6h₂o + 6o₂ + sunlight → c₆h₁₂o₆ + o₂

1. if a student is conducting a photosynthesis experiment, which part of the plant should she use to obtain a sample of chloroplasts?

a stems
b roots
c bark
d leaves

Explanation:

Question 1

Organisms that can perform photosynthesis (convert sunlight to chemical energy) are autotrophs, typically plants (oak tree, tomato plant). Mushrooms (fungi), butterflies, dogs, and yeast are heterotrophs (consume energy). So the correct options are the ones representing plants.

Heterotrophs obtain energy by consuming organic matter (like glucose). Option D says "obtains energy by consuming glucose" which fits heterotrophs. Option A is autotroph (photosynthesis), B is about pigments (autotroph), C is photosynthesis process (autotroph).

The correct photosynthesis equation is \( 6CO_2 + 6H_2O + \text{sunlight}
ightarrow C_6H_{12}O_6 + 6O_2 \). Let's check: reactants are \( CO_2 \), \( H_2O \), light; products are glucose (\( C_6H_{12}O_6 \)) and \( O_2 \). Option B matches this. Option A has \( H_2O \) as product (wrong), C has \( H_2 \) (wrong), D has extra \( CO_2 \) and \( O_2 \) in reactants (wrong).

Answer:

A. an oak tree, E. a tomato plant

Question 2