Gametes may carry different combinations of alleles because of Select one:
a. random fertilization and alignment of chromosomes.
b. random fertilization and crossing over.
c. crossing over and random alignment of chromosomes.
d. random fertilization.
e. random alignment of chromosomes.
c. crossing over and random alignment of chromosomes.
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Birds that live in marine environments, and thus lack access to fresh drinking water, _____
A) osmoregulate without using a transport epithelium for this purpose B) drink seawater and secrete excess ions through their kidneys only C) drink seawater and secrete excess ions mainly through their nasal salt glands D) have plasma that is isoosmotic to ocean water E) obtain water by eating only osmoregulating prey
Why do scientists use model organisms?
What will be an ideal response?
Nodules found on the roots of some plants are involved in supplying which element for the plant?
a. aluminum b. boron c. magnesium d. nitrogen e. chlorine
Which protist group typically consists of amoeboid cells surrounded by a hard outer shell through which cytoplasmic
projections extend? a. rhizarians b. unikonts c. euglenoids d. archaeplastids e. opisthokonts