If RNA was the first information storage molecule, what macromolecule would have been the "next"
molecule produced in the progression toward living cells?
a. DNA
b. lipids
c. carbohydrates
d. sugars
e. proteins
E
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If an autosomal ____________________ allele is very common in a population, there is a chance that it will enter the pedigree from outside the family
Fill in the blank(s) with correct word
Freshwater lakes in temperate regions will turn over in the ____
a. fall only b. winter only c. spring only d. summer only e. fall and spring
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?
The Archaea generally lack which of the following that are normally found in Gram-negative bacteria?
A. A complex peptidoglycan network B. Outer membrane C. Lipopolysaccharide D. All of the choices are correct.