What percentage of the nervous system is made up of neurons?
a. five
b. ten
c. fifteen
d. twenty
e. fifty
B
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A consensus sequence in the untranslated leader sequence of a prokaryotic mRNA, which serves as a ribosome binding site is called the ________ sequence.
Fill in the blank(s) with the appropriate word(s).
Most soil water moves from epidermis to vascular cylinder by:
a. diffusing through root cell walls and then actively transported through cortex cells b. enter a cell wall's cytoplasm only through transport proteins in its plasma membrane c. diffusing through root cell walls d. diffusing through root cell walls and then move through plasmodesmata e. actively transported into root cells and then move through plasmodesmata
Based on the accompanying figure, the ____ is much more developed in amphibians than in reptiles
a. cerebellum
b. cerebrum
c. optic lobe
d. olfactory tract
e. corpus striatum
Within the embryo sac of the angiosperm, ________ nuclei are arranged in precise positions.
A. 2 B. 4 C. 6 D. 8 E. 10