Respond to statements 87–91 with reference to the four levels of
organization listed below.
a. population
b. community
c. ecosystem
d. biosphere
E 87. This is composed of producers, consumers,
decomposers, and the abiotic environment.
E 88. All of the individuals of a single species living in a
region constitute this.
M 89. A group of different species living together in a
single habitat is this.
M 90. This is the basic functional unit of ecology.
E 91. This encompasses all of the others.
Answers: 87. c, 88. a, 89. b, 90. a, 91. d
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One characteristic of an autosomal dominant trait is that ____
a. 50% of individuals with two affected parents will be affected b. if two affected individuals are homozygous, the risk of having an affected child is 1:4 c. heterozygous fathers will always have affected daughters d. every affected individual has at least one affected parent e. mothers always pass the trait on to their sons
Attribute one of these statements to the blastopore.
A. it occurs in both protostomes and deuterostomes. B. it is the opening from the coelom to the outside of the animal. C. it is the opening from the archenteron to the coelom. D. it can develop into the brain in some animals. E. it can develop into the gut in some animals.
In Linnaeus taxonomy closely species are assigned to the same genus , and closely related genera are
grouped into a. domains b. phyla c. classes d. families e. kingdoms
____ is an adrenal hormone that makes kidney tubules more permeable to sodium and encourages sodium reabsorption, thus increasing water reabsorption and concentrating the urine.
A. ADH B. ANP C. Angiotensinogen D. Aldosterone E. AMP