About how many types of differentiated cells are in the body of an adult human?
a. 100
b. 200
c. 500
d. 1,000
e. 10,0000
ANSWER: b
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Radiolarians have characteristic ____, which are thin, ray-like strands of cytoplasm supported internally by bundles of
____.
a. axopods; microfilaments b. axopods; microtubules c. spicules; microfilaments d. spicules; microtubules
e. microfilaments; axopodsConservation biology is an interdisciplinary science that focuses on ____
a. saving endangered species b. sequencing the DNA of all species on Earth c. cataloging endemic plant species d. researching trigger species e. maintenance and preservation of biodiversity
Which of the following statements is NOT
true?
a. In asexual reproduction, the parent passes a complete set of genes to its offspring. b. In sexual reproduction, both meiosis and fertilization are usual events in the life cycle. c. In sexual reproduction, a human offspring receives two genes for every trait. d. Sexual reproduction puts together new combinations of genes. e. Sexual reproduction results in less variation within a population
Select the hydrogen acceptor molecule that stores electrons in the process of photosynthesis:a
nicotinamide adenine dinucleotide (NAD+) b. nicotinamide adenine dinucleotide phosphate (NADP+) c. flavin adenine dinucleotide (FAD) d. adenine triphosphate (ATP) e. adenine diphosphate (ADP)