Which of the following is a cost experienced by an individual in a promiscuous mating system?
A. An individual experiences high risk of sexually transmitted diseases and parasites.
B. If a male does not have an alpha ranking, he is unlikely to mate at all.
C. The male does not ensure 'genetic insurance' by mating with multiple females.
D. Cuckoldry is common (where a male contributes to parental care of an offspring that he is not related to).
Ans: A. An individual experiences high risk of sexually transmitted diseases and parasites.
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The HIV virus that causes AIDS is an RNA retrovirus. A retrovirus _____
A) uses DNA as a template in the process of translation B) makes proteins directly from RNA C) used reverse transcriptase to make DNA from RNA D) a cellular virus that uses ribosomes to reproduce inside a living cell
Answer the following statements true (T) or false (F)
1.The polar body formed after meiosis I becomes the egg cell. 2.Oogenesis is the formation of a diploid germ cell that divides into primary oocytes. 3.Pregnant women undergo strenuous processes during childbirth collectively known as labor. 4.Prolactin is the hormone that stimulates contractions during labor. 5.An intrauterine device (IUD) prevents pregnancy by blocking the sperms from entering into the vagina.
Which term broadly describes any kind of interaction between two or more animals?
A) competition B) dominance hierarchy C) foraging behavior D) social behavior
Most of the species of organisms found in estuaries are classified as ____________ because they can tolerate a wide range of salinity.
Fill in the blank(s) with the appropriate word(s).