The fossil evidence indicates that amphibians evolved from ________
Fill in the blank(s) with correct word
fish
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An explanation for why an individual that is incapable of generating the fight or flight response would be abnormal function of this gland.
A. thyroid gland B. adrenal gland C. gonad D. heart E. pituitary gland
In the neritic zone, a 10-milliliter sample of surface water can contain ____ of multicellular planktonic organisms
a. hundreds b. thousands c. millions d. billions e. trillions
Which of the plant growth regulators is not transported, but stays within the cell that produced it?
a. gibberellins b. ethylene c. phytochrome d. cytokinins e. auxins
Barbara McClintock discovered mobile elements in corn by analyzing the genetic behavior of two elements, Ds and Ac. The interplay between these two elements has become one of the most interesting stories of discovery in the field of genetics
How do Ds and Ac interact? A) Both elements can move only within chromosome 9. B) Ds causes a deletion next to the insertion site of Ac. C) Ac causes a deletion next to the insertion site of Ds. D) The movement of Ac is dependent on two forms of Ds. E) Ds moves only if Ac is present in the genome; Ac is capable of autonomous movement.