The metamorphosis of a caterpillar into a butterfly is an example of
A) internal development.
B) placental development.
C) indirect development.
D) direct development.
E) external development.
C
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Which process produces a gaseous product that can be used as fuel to provide heat or power for a wastewater treatment plant?
A) trickling filter secondary wastewater treatment B) aerobic secondary wastewater treatment C) anaerobic secondary wastewater treatment D) primary wastewater treatment
Development of an animal is connected to the genes that are expressed during development. What roles have been proposed for Hox genes in the evolution and morphology of animal species? Select all that apply.
_____ Variation in the number of Hox genes has led to the evolution of new animal species. _____ An increase in the number of Hox genes leads to an increase in the body size of an animal. _____ The greater the number of Hox genes the more complex the body plan of the animal. _____ The clustering of Hox genes has only evolved in vertebrates and is responsible for the evolution of vertebrae.
Which of the following organs serves as a transition between the pharynx and the trachea?
a. nasal cavity b. bronchi c. larynx d. alveoli
What would likely be true when P = 0.9?
A) Rate of extinction would be high. B) Rate of colonization would be high. C) Proportion of patch occupied would be low. D) Corridor size would be small.