Soon after amniotic vertebrates appeared, two different evolutionary lineages began to diverge. They are:
a. the mammals and the reptiles.
b. the mammals and the birds.
c. the reptiles and the birds.
d. the amphibians and the reptiles.
e. the crocodiles and the birds.
Ans: a. the mammals and the reptiles.
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The structural difference between saturated and unsaturated fats causes what type of change at room temperature?
A. Linear structure of a fatty acid causes solid formation at room temperature. B. Double bonds in saturated fatty acids cause a solid structure at room temperature. C. A linear structure causes a loose forming macromolecule that is liquid at room temperature. D. The double bonds require higher temperatures at room temperature to make this fatty acid into a liquid.
If a cell had a single nonfunctional DNA repair enzyme, how would that cell be affected?
A) The cell could not possibly be viable without that DNA repair enzyme. B) Mutations during DNA replication would not be repaired, so replication and therefore division would not be possible. C) The cell's other DNA repair enzymes would most likely compensate and cell viability would be maintained. D) DNA polymerase would re-replicate any damaged regions of DNA.
Changes due to developmental plasticity are reversible
Indicate whether the statement is true or false
Adaptations aid in the survival and reproduction of an organism in a particular environment
Indicate whether the statement is true or false