Humans rely on fossil fuels for much of our energy needs. The burning of fossil fuels adds carbon dioxide (CO2) to the carbon dioxide already in the atmosphere. How do plants help keep some of this extra carbon dioxide from accumulating in the atmosphere?
A) Plants store carbon dioxide in their tissues.
B) Plants return carbon dioxide to the ground through their roots.
C) Plants take in atmospheric carbon dioxide to produce food.
D) Plants break down carbon dioxide into carbon and oxygen.
Ans: C) Plants take in atmospheric carbon dioxide to produce food.
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A mutation arises in an individual that decreases its fitness. This means that this individual's
A. probability of survival will decrease. B. ability to find food will decrease. C. ability to migrate long distances will decrease. D. contribution to the gene pool of the next generation will decrease. E. likelihood of having healthy offspring will increase.
The digestive organ that stores food in penguins is called a: a. crop
b. hular pouch. c. vacuole. d. head adornment.
Skin cells typically do not divide. Indicate whether the statement is true or false
In which eukaryotic organelle are various macromolecules broken down and destroyed?
A) the Golgi apparatus B) endoplasmic reticulum C) mitochondria D) lysosome