European cuckoo birds lay their eggs in the nest of other bird species, allowing the other birds to raise their young. The cuckoo birds are therefore:
a. foster parents
b. commensals
c. endosymbionts
d. brood parasites
e. ectoparasites
d
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Write the letter of the terrestrial biome with the lowest mean precipitation next to 1. Sequence the
remaining biomes by increasing precipitation, finishing by writing the letter of the biome with the highest mean precipitation next to 4.
A. chaparral B. desert C. tropical forest D. savanna 1. 2. 3. 4.
An X-linked carrier is a ____
a. homozygous dominant female b. heterozygous female c. homozygous recessive female d. homozygous male e. heterozygous male
The ciliary muscle
a. controls the eardrum. b. controls the shape of the lens to allow focusing. c. holds the bones of the middle ear in place. d. enables the eyeball to move so that a person may see an object without moving the head. e. is responsible for the size of the pupil in different light intensities.
Which of the following is necessary for DNA to make copies of itself?
A. Ribosomes must be present. B. The cell must have an abundant supply of RNA nucleotides. C. The two strands of the DNA molecule must separate. D. Chromosomes must be synapsed.