Kingdom Monera consists of:
Answer: prokaryotic cells (lack nucleus and membrane bound structures); all bacteria
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DNA is the main hereditary material of all life. However, DNA lacks one important characteristic for the first forms of life. Why have researchers rejected the idea that DNA was found in the first life form?
A) It does not function as a catalyst. B) It is not stable enough to have withstood early Earth's harsh atmosphere. C) DNA only has four types of bases. Therefore, DNA cannot adapt and evolve. D) The type of sugar found in DNA is too complicated to have been present early in Earth's history.
In eukaryotes, mitochondria are the organelles primarily involved in:
A. export of enzymes. B. lipid synthesis. C. phospholipid assembly. D. protein synthesis. E. energy release/capture.
Which of the following organs of cephalopods resemble those of the vertebrates?
A. arms B. nephridia C. eyes D. digestive tissues E. foot
Cholesterol, a membrane lipid in animals, has a chemical structure similar to
a. estradiol. b. phosphatidylinositol. c. thymine. d. triacylglycerol.