How does fruit improve the reproductive success of an angiosperm?
a. by protecting developing embryos
b. by facilitating relationships with insects
c. by deterring damage from animals
d. by attracting essential pollinators
a. by protecting developing embryos
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In an experiment, the control group is
a. not subjected to experimental error. b. exposed to experimental treatments. c. maintained under strict laboratory conditions. d. treated exactly the same as the experimental group, except for one variable. e. statistically the most important part of the experiment.
Rickets in children and bone softening in adults is
the result of a deficiency of what vitamin? a. A b. B c. C d. D e. E
The veliger larval form is unique to:
a. insects. b. annelids. c. molluscs. d. arthropods. e. crustaceans
Albinism is an autosomal (not sex-linked) recessive trait. A man and woman are both of normal pigmentation and have one child out of three who is albino (without melanin pigmentation). What are the genotypes of the albino's parents?
A) One parent must be homozygous for the recessive allele; the other parent can be homozygous dominant, homozygous recessive, or heterozygous. B) One parent must be heterozygous; the other parent can be homozygous dominant, homozygous recessive, or heterozygous. C) Both parents must be heterozygous. D) One parent must be homozygous dominant; the other parent must be heterozygous.