When is the endometrium thickest in the female reproductive cycle?
a. in the secretory phase
b. shortly before ovulation
c. during ovulation
d. during the proliferative phase
Ans: a. in the secretory phase
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Write the empirical formula for a carbohydrate
Fill in the blank(s) with the appropriate word(s).
All animals are ____.
A. multicellular, heterotrophic, and motile B. multicellular, heterotrophic, and have walled cells C. unicellular, autotrophic, and motile D. multicellular, autotrophic, and reproduce sexually E. unicellular, autotrophic, and reproduce asexually
Contact inhibition means that
A. cells are able to divide without the presence of stimulatory growth factors. B. when cells come in contact with a neighbor, they stop dividing. C. cells have gained the ability to invade lymphatic and blood vessels. D. cells only divide a certain specified number of times and then quit. E. there are more chromosomes within the nucleus than there should be.
Currently the world population growth is approximately 1.2%. If the birthrate in 2009 was 19.86 per 1000, what was the death rate?
A. 78.6 B. 12 C. 7.86 D. 19.86 E. 1.2