Phosphate groups are important components of:
a. triglycerides.
b. nucleic acids.
c. amino acids.
d. structural polysaccharides.
e. All of the above are correct.
Ans: b. nucleic acids.
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When both participants in a species interaction develop adaptations in direct response to one another, in the long term this could progress into:
A. coevolution. B. competitive exclusion. C. extinction of one species. D. intraspecific competition. E. resource partitioning.
In humans, helminths generally infect the ________.
A. nervous system B. urinary tract C. gastrointestinal tract D. skin E. muscular system
A person with type O blood has which antibodies?
a. A only b. B only c. A and B d. neither A or B e. O
Draw a cladogram that for the following animals: sponges, cnidarians, flatworms, echinoderms,
chordates, molluscs, annelids, nematodes, and arthropods. On your cladogram indicate the points where the following evolved: 1) true tissues, 2) bilateral symmetry, 3) three germ layers, 4) segmentation, 5) protostome development, and 6) deuterostome development What will be an ideal response?