A human embryo is capable of movement and has gonads that are distinguishable as either testes or
ovaries by the end of the:a.
second week.
b. fourth week.
c. sixth week.
d. eighth week.
e. first trimester.
E
You might also like to view...
Predict which of the following scenarios would be most likely to result in an action potential
A. dendrites: high-frequency IPSP; cell body: low-frequency EPSP B. dendrites: low-frequency EPSP; cell body: high-frequency IPSP C. dendrites: low-frequency IPSP; cell body: high-frequency EPSP D. dendrites: high-frequency EPSP; cell body: high-frequency IPSP
True or False: There are a number of biological clocks and the circadian clock is just one of them
A. true B. false
Refer to the accompanying figure. The function of the structure labeled as 3 is to:
a. secrete an alkaline fluid that neutralizes the acids of the vagina.
b. produce a nutritive fluid for the sperm. c. provide a place for maturation and storage of sperm. d. secrete mucus that lubricates the penis. e. maintain sperm at a low body temperature
An organic molecule contains two or more atoms of
A. carbon. B. hydrogen. C. oxygen. D. All of these answers are true.