Human female germ cells form ____
a. before birth
b. shortly after birth
c. at puberty
d. during late teenage-hood
e. at fertilization
ANSWER: a
You might also like to view...
Is there a certain type of virus morphology that is especially known to cause disease in humans? Explain your reasoning
What will be an ideal response?
Is it correct to state that human evolution did not proceed from one species to the next, each evolving to be more modern? Why or why not?
What will be an ideal response?
Where does the bond form that binds one strand of DNA to its other strand?
A) Between the sugar and the base B) Between the phosphate group and the sugar C) Between the bases D) Between the phosphate groups
Researchers applied radioactive phosphorus and radioactive calcium to a freshly cut tree stump. Eight days later, they came back to measure the distribution of the radioisotopes. They found that nineteen different species of shrubs and trees within a seven-meter radius had taken up the radioactive elements. No radioactivity was detected in the air. Radioactive isotopes were never detected in any samples containing just soil taken during the experiment. The finding implies that the
a. soil does not provide the ecosystem with minerals b. isotopes were undetectable in very small amounts c. isotopes were transported via vascular tissues d. plants quickly return minerals to the soil in which they grow e. soil speeds up radioactive decay