The use of the principles of ecology to return a degraded environment as close as possible to its former
state is called:a.
in situ conservation.
b. ex situ conservation.
c. conservation biology.
d. restoration ecology.
e. corridor formation
D
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Sheree is referred to a genetic counselor because a cystic fibrosis (CF) test done as a routine part of her prenatal care indicated that she is a carrier of the most common mutant allele. Sheree is stunned, because no one in her family has the disease. She is 26 years old. The genetic counselor would most likely
A) explain autosomal recessive inheritance and suggest that Sheree's husband be tested for CF. B) explain autosomal dominant inheritance and suggest that Sheree's husband be tested for CF. C) explain autosomal recessive inheritance and suggest that Sheree's parents be tested for CF. D) advise Sheree to have amniocentesis to check the fetus for the CF genotype.
A breeder of cattle has a herd of white cows and a roan bull. Hair color in this breed is controlled by an incompletely
dominant gene. The two homozygous forms are either red or white, and the heterozygous is roan. (a) What colors of calves are expected and in what proportions? (b) Outline a procedure to develop an all-red herd. What will be an ideal response?
Four of the following are shared characteristics of parabasalids and diplomonads. Which is the exception?
A. Heterotrophic B. Flagella C. Oxygen-poor or anaerobic habitats D. Abundant mitochondria E. Live in animals
The term that refers to the presence of flagella all over the cell surface is
A. monotrichous. B. lophotrichous. C. peritrichous. D. atrichous. E. amphitrichous.