In flowering plants, the immature male gametophyte is the:a
anther.
b. pollen grain.
c. carpel.
d. style.
e. androecium.
B
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In Chapter 2, you learned about beneficial bacteria that live on our skin and lower the pH,
which in turn keeps other disease-causing bacteria in check. This relationship between beneficial bacteria and their human hosts is an example of __________.
a. coevolution b. adaptive radiation c. sexual selection d. mutation
Cholesterol ____
a. has a rigid backbone of four nitrogen rings b. is the most common steroid in animal tissue c. is a lipid with a fatty-acid component d. is needed to inhibit sexual development and maturity e. is needed to lubricate feathers
The range of phenotypic possibilities that can develop from a certain dog genotype under different
environmental conditions is called the:a. epistatic interaction. b. norm of reaction. c. nurture limit. d. genotype range. e. maximum phenotype
FSH stimulates interstitial cells in the testes to produce testosterone
Indicate whether the statement is true or false