Heterospory is believed to have led to the evolution of:
a. eggs.
b. seeds.
c. xylem.
d. phloem.
e. pollen.
b
Biology & Microbiology
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The two main factors controlling the density of water are:
a. salinity and temperature. b. salinity and heat capacity. c. salinity and pH. d. pH and heat capacity. e. temperature and pH.
Biology & Microbiology
Which part of the human brain is responsible for fine-tuning movements to maintain balance?
1.Cerebrum 2.Cerebellum 3.Hypothalamus 4.Medulla oblongata
Biology & Microbiology
The Earth has a constant tilt of _____ on its axis from its plant of orbit.
A. 12.5 degrees B. 23.5 degrees C. 30 degrees D. 9 degrees E. 5.5 degrees
Biology & Microbiology
A cladogram must contain a(n) ________ to serve as a baseline of comparison for the other groups.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology