Echinoderms are related to Chordates because the first opening to develop becomes the mouth. Indicate whether the statement is true or false
False - anus
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Well-designed microbial activity measurements can reveal ________ of major metabolic reactions in a habitat
A) types B) rates C) both types and rates D) either types or rates (but not both)
Support for the succession mechanism of tolerance is found in research on plant communities that shows
A. that plants release toxins that prevent other species from establishing. B. succession is random and cannot be predicted by existing species. C. climax communities never form as predicted by Clements. D. succession is determined largely by species that exist in the ground as seeds or old roots. E. competition-tolerant species colonize first.
Are all mutations eventually eliminated by natural selection?
a. yes b. no
A daughter can inherit an X-linked recessive disorder if
A) her mother is a carrier and her father has the disorder.
B) her mother is affected with the disorder.
C) her father is hemizygous for the disorder and her mother is wild type.
D) her father is a carrier of the disorder.