According to genetic evidence, the migration of H. sapiens out of Africa replaced other human populations, including
Neanderthals and H. erectus, leading to their extinction.
a. True
b. Fals
True
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Which of the following best describes a metastable state?
A) This state is composed of the difference in activation energy of a catalyzed versus an uncatalyzed reaction. B) The metastable state is formed by transient complexes with the substrate. C) The metastable state is created by the prosthetic group of the enzyme. D) This state changes the position of the equilibrium but not the rate. E) The metastable state is a state of the substrate in which the reaction can proceed but typically requires a catalyst.
If a cell has four pairs of chromosomes, after mitosis each daughter cell will have how many chromosomes?
A. 16 B. 8 C. 2 D. 32 E. 4
What type of tissue, consisting of a single layer of flattened cells, is designed to allow the easy diffusion of oxygen
from blood to tissue? a. simple connective b. simple squamous epithelium c. stratified columnar epithelium d. pseudostratified epithelium e. compound epithelium
In mutualistic interactions, one species is harmed and one benefits
Indicate whether the statement is true or false