Which statement is true?
a. Long-term energy storage, such as body fat reserves for hibernation, do not factor into a species’ energy budget.
b. A species’ life history is determined entirely by natural selection and the inheritance of genetic material.
c. All organisms must balance the energy they expend on activities with energy intake from diet or photosynthesis.
d. Increased fecundity corresponds to an increased energy budget for most animals.
c. All organisms must balance the energy they expend on activities with energy intake from diet or photosynthesis.
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Which of the following is most likely to grow at refrigerator temperatures?
A. mesophiles B. psychrophiles C. thermophiles D. acidophiles
In garden peas, one pair of alleles controls the height
of the plant, and a second pair of alleles controls flower color. The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with purple flowers crossed with a tall plant with white flowers produces 3/8 tall purple, 1/8 tall white, 3/8 dwarf purple, and 1/8 dwarf white. What is the genotype of the parents? What will be an ideal response?
The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by a recessive mutant gene that independently assorts with a recessive gene for hairy (h) body. Assume that a cross is made between a fly with normal wings and a hairy
body and a fly with vestigial wings and normal body hair. The wild-type F1 flies were crossed among each other to produce 1024 offspring. Which phenotypes would you expect among the 1024 offspring, and how many of each phenotype would you expect? A) Phenotypes: wild, vestigial, hairy, and vestigial hairy; Numbers expected: wild (192), vestigial (256), hairy (64), and vestigial hairy (192). B) Phenotypes: wild, vestigial, hairy, and vestigial hairy; Numbers expected: wild (576), vestigial (192), hairy (192), and vestigial hairy (64). C) All wild type. D) All vestigial hairy. E) Phenotypes: wild, vestigial, hairy, and vestigial hairy; Numbers expected: wild (256), vestigial (256), hairy (256), and vestigial hairy (256).
The primary function of the stomach is to
A. eliminate water and tissue fluid. B. absorb major nutrients. C. package feces. D. break down fats. E. store food, churn, and begin digestion.