Homologous chromosomes become attached to either ____ in prophase I.
A. sister
B. spindle pole
C. nucleus
D. chromosome
E. chromatid
Answer: B
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The text discusses what types of morphological characteristics were used by early scientists to arrive at the phylogeny of animals. DNA sequence data have helped in the revision of phlyogenies of taxa within the larger groups
(i.e., bilaterians, sponges, cnidarians). Why are characteristics like "fate of the blastopore" or "body symmetry" relatively good at predicting larger-scale branching patterns on phylogenies? A. The development of these characteristics is controlled genetically, so similarities in DNA sequence would be expected in more closely related taxa. B. Characteristics like those described are necessary for living, so all organisms must have those traits. C. All animals are descended from a common ancestor that had the traits described above. D. The development of these characteristics is controlled genetically, so DNA sequences for important genes would be the same between closely related taxa.
Some animals allow their body temperature to conform to the environment. What is the old term for these animals, and what is the newer preferred term?
A. heterotherms; homeotherms B. homeotherms; endotherms C. isotherms; poikilotherms D. poikilotherms; ectotherms E. endotherms; homeostats
Muscle tone keeps tendons taut as they cross joints
What will be an ideal response?
Neanderthals were first discovered near and named for the:a
Neander Bay in Canada. b. Neander Valley in India. c. Neander River in Africa. d. Neander Valley in Germany. e. Neander Mountains in France.