Checkpoint 3

Which statement BEST describes the role of plants in energy flow?

• .

  Plants convert light energy into chemical energy by the process of cellular respiration.

•  

  Plants convert light energy into chemical energy through the process of photosynthesis.

  
  

• .

  Plants convert chemical energy into light energy through the process of photosynthesis.

• .

  Plants convert chemical energy into light energy through the process of photosynthesis.

As carbon dioxide levels in the atmosphere increase, which of the following occurs (assuming all other variables are constant)? (Select all correct answers.) ​ ​ ​

• 
  The rate of photosynthesis will increase.

• The rate of photosynthesis will decrease.

• Oxygen in the atmosphere will increase.

• The amount of glucose plants produce will decrease.

• The amount of glucose plants produce will increase.

Which of the following BEST describes the flow of energy in a cabbage plant?

• Solar energy is absorbed by mitochondria, converted and stored in sugars, and released in chloroplasts.

• 
  Solar energy is absorbed by chloroplasts, converted and stored in sugars, and released in mitochondria

• 
  Chemical energy is absorbed by chloroplasts, stored in sugars, and released in mitochondria.

• Chemical energy is absorbed by mitochondria, stored in sugars, and released in chloroplasts.

What do the two food webs have in common?

• They both contain omnivores.

• They both rely on photosynthesis.

• They both have carnivorous birds.

• They both have four levels of consumers.

A student is shown a slide of cells from a species of producer in a food web. The student observes that the cells have chloroplasts. What conclusion about the food web is BEST supported by these findings?

• The producers capture energy from sunlight.

• The food web is found in a terrestrial ecosystem.

• The producers in the web are single-celled organisms.

• The food web contains many herbivores and omnivores.

Animals depend on plants for many things, including food. What do plants depend on from animals?

• energy for photosynthesis

• pest control

• carbon dioxide

• oxygen

Which organelle converts glucose to energy for cellular work?

• .

  nucleus

• mitochondrion

• vacuole

• chloroplast

How are plant cells different from animal cells?

• Only plant cells can grow.

• Only animal cells can reproduce.

• Only animal cells can store energy.

• Only plant cells can perform photosynthesis.

A scientist is looking at a tissue sample with cells that have a large number of green structures. What tissue is the scientist looking at?

• bone tissue

• leaf tissue

• muscle tissue

• 
  stem tissue

A scientist is looking at a tissue sample in which the cells have a higher-than-normal concentration of mitochondria. Which type of tissue is the scientist most likely observing?

• muscle tissue

• epithelial (skin) tissue

• nerve tissue

• bone tissue