Which of these was the dominant plant group at the time that dinosaurs were the dominant animals?
a) bryophytes
b) charophyceans
c) seedless vascular plants
d) gymnosperms
e) angiosperms
Ans: d) gymnosperms
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How many covalent bonds do noble gases form in nature?
a. Noble gases may form as many as three covalent bonds. b. Noble gases may form up to eight covalent bonds. c. Noble gases do not form covalent bonds with other atoms. d. Noble gases only form single bonds with other noble gases.
What did Mendel propose to explain the 3:1 ratio of dominant to recessive traits he observed in his pea plants?
a. Plants expressing dominant traits carry three copies of the genes for those traits versus only one copy for recessive traits. b. Plants with dominant traits were 300% more likely to survive to maturity after fertilization when they could be observed. c. Each plant had two copies of each trait, and recessive traits were only expressed if both copies were the recessive form. d. All pea plants contain the same genetic material, but dominant pea plants express traits three times more strongly than others.
Avery, Macleod, and McCarty expanded on Griffith's experiment to prove that DNA is the hereditary molecule required for transformation. What treatment of the heat-killed SIII bacteria extract resulted in the mouse living?
A) destroying type SIII lipids and polysaccharides B) destroying type SIII DNA with DNase C) destroying type SIII RNA with RNase D) destroying type SIII proteins with protease E) the control group (null treatment), in which all components are intact
Connective tissue serves to support and bind other tissues. Which of the following is NOT an example of connective tissue?
A. Bone B. Fat C. Blood D. Cartilage E. Neurons