For Mendel's law of segregation requires that
A. the genes for the traits he studied must be located on the same chromosome.
B. two alleles at any locus are distributed into separate gametes during meiosis.
C. genes are not transmitted independently of each other.
D. chromosomes be duplicated by mitosis.
E. only triploid organisms demonstrate inheritance patterns.
Answer: B
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The central nervous system of a mammal includes the
(a) brain. (b) spinal cord. (c) brain and spinal cord. (d) brain, spinal cord, and every major nerve in the body.
Radiometric dating of the most ancient fossils uses the
a. dating volcanic rocks above and below the fossil-containing layer of sedimentary rock. b. ratio of carbon 14 to carbon 12 in a sample of the fossil. c. counting of the rings of trees found with the fossils. d. comparison of unknown fossils with fossils of known age. e. transmission of radio waves through the fossil.
Which is NOT a shared characteristic of
parabasalids and diplomonads? a. heterotrophy b. flagella c. oxygen-poor or anaerobic habitats d. abundant mitochondria e. presence of a pellicle
What tissue comprises the outer bark of woody plants?
a. ground tissue b. epidermis c. phloem d. periderm e. xylem