In the presence of predators, some tadpoles grow larger and more colorful tails to avoid lethal strikes to the head. This ability to respond to the environment via morphological traits is known as
A) phenotypic plasticity.
B) outcrossing.
C) dioecious.
D) K-strategy.
A
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The pH in the stroma of the chloroplast should be ________ compared to the thylakoids due to the _______
A. higher; higher concentration of hydrogen ions in the thylakoid B. lower; higher concentration of hydrogen ions in the thylakoid C. higher; lower concentration of hydrogen ions in the thylakoid D. lower; lower concentration of hydrogen ions in the thylakoid
An inanimate object that may be contaminated with a pathogen is called a ________.
A. fomite B. vector C. zoonoses D. None of the choices are correct.
During gastrulation in sea urchins, invagination produces a cavity called the ____
a. archenteron b. primary mesenchyme c. secondary mesenchyme d. blastocoel e. blastocyst
What contribution did Charles Lyell make?
A. He found some fossils of extinct species. B. He provided the first evidence that the Earth is much older than was previously thought. C. He suggested that life evolves through physical changes within the life span of an organism. D. He found some bird specimens on the Galapagos Islands.