Why are fall and spring temperatures colder in deeper areas of lakes than they are in the winter?
A) Air temperatures are colder in the fall and spring.
B) There is a lag in time for the cold water to reach these depths.
C) Aquatic animals are more active in the winter.
D) Lake stratification causes colder water to sink in spring and fall.
D
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a. follicle stimulating hormone b. luteinizing hormone c. human beta chorionic gonadotropin d. estrogen
In what part or parts of the plant life cycle does
mitosis NOT take place?
a. from zygote to sporophyte b. from spore to gametophyte c. from gametophyte to gamete d. from sporophyte to spores e. Mitosis takes place in all of these parts of the life cycle.
Water surface tension is caused by __________ bonds. Fill in the blank(s) with the appropriate word(s)
Which gland shrinks in size during adulthood, and has hormones that function in maturation of T-lymphocytes?
A. tonsils B. lymph nodes C. spleen D. galt E. thymus