Which of the following is found in angiosperms but not in gymnosperms?
A) seeds
B) pollen
C) cones
D) microsporangia
E) anthers
Answer: E
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Metamorphosis is
A. changing of one body form to another within a species, such as the change from an aquatic tadpole to a terrestrial frog. B. an intermediate condition, such as length of legs in mice between longer legs of some mice and shorter legs in others, a condition caused by Hox genes. C. the developmental changing of a scale to a feather. D. the evolutionary transition from fishes to amphibians.
The theory that early metabolic reactions occurred in rocks near hydrothermal vents is known as the _____hypothesis
a. RNA world b. endosymbiont c. iron-sulfur world d. vital force e. lightening fueled
The calyx is composed of
a. petals. b. sepals. c. stigmas. d. ovules. e. anthers
If a pathogen penetrates nonspecific physical and chemical surface barriers, it breaks through the ________
A) first line of defense B) first and second lines of defense C) second line of defense D) third line of defense