Steroid hormones are synthesized from:
a. amino acids
b. peptides
c. proteins
d. cholesterol
e. fatty acids
d
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As you examine a soil sample under your microscope, you note the presence of tiny, wormlike organisms. You immediately suspect that these creatures are nematodes. The presence of which characteristics would support your hypothesis? Check all that apply.
_____ longitudinal but not circular muscles. _____ separate male and female individuals. _____ shedding of the integument. _____ a tough, collagen-based cuticle. _____ abundant flame cells,
Which of the following can be found in an animal cell, but not a plant cell?
a. centrosomes b. mitochondria c. DNA d. ribosomes
Outline the various ways in which chromosomes can regulate how much of an enzyme is present at
any given time within a eukaryotic cell. What will be an ideal response?
New polynucleotide strands are initiated by a primosome containing RNA polymerase that synthesizes a short RNA primer complementary to a region of the template strand.
a. true b. false