A pathway for cell growth control is conserved between Drosophila and humans, indicating that the pathway is ____
a. also found in prokaryotes
b. also found in all animals
c. at least 800 million years old
d. at least 3.8 billion years old
e. at least 8 million years old
ANSWER: c
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Characters that exist in two or more discrete states are described as exhibiting ____
a. quantitative variation b. qualitative variation c. genetic equilibrium d. punctuated equilibrium e. disruptive selection
The concentrations of ions are very different inside and outside a nerve cell due to _____
A) osmosis B) diffusion C) sodium-potassium pumps D) symports and antiports
Mendel used the garden ___ plant for his studies on inheritance.
A. lily B. carrot C. onion D. pea
The solubilization of metals from low-grade ores by microorganisms is called ________.
What will be an ideal response?