Which of the following is true regarding insect
tracheal systems?
a. They are associated with the blood circulatory
system.
b. They excrete body wastes as well as transport
gases.
c. They have water-conserving adaptations in large
terrestrial insects.
d. The tracheal tubes are continually open in large
terrestrial insects.
e. They contain respiratory pigments to enhance
oxygen transport.
Answer: c
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In a haploid dominant species
A. the multicellular organism is diploid and the gametes are haploid. B. the multicellular organism is haploid and the gametes are diploid. C. diploid cells are produced by mitosis and haploid cells are produced by meiosis. D. the zygote is haploid. E. the multicellular organism is haploid and the zygote is diploid.
The common building block of ________ is the phenylpropene unit, which consists of a hydroxylated six-carbon aromatic benzene ring and a three-carbon linear side chain.
Fill in the blank(s) with the appropriate word(s).
People tend to crave sweet and salty foods, but dislike bitter foods. What is the evolutionary
explanation for this? What will be an ideal response?
The secretion of which hormones qualifies the pancreas as an endocrine gland?
A. digestive juices and glucagon B. mineralocorticoids and insulin C. estradiol and digestive juices D. insulin and glucagon E. insulin and digestive juices