The fovea
a. is the blind spot produced by the optic nerve
entering the eye.
b. is the region of the retina filled with cones that
allows the most acute vision.
c. is the region of the retina that has the greatest
concentration of rods that enable sight under
extremely dim conditions.
d. focuses light on the retina.
e. is the anterior fluid-filled chamber of the eye.
Answer: b
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In the remaining megaspore, three rounds of mitosis with no cytoplasmic division result in a single cell with ____ haploid nuclei
a. three b. four c. six d. eight e. twelve
A gene that produces multiple effects is called a(n)
a. multiple allele. b. autosome. c. epistatic gene. d. pleiotropic gene. e. incompletely dominant gene.
The difference in the fundamental niche and the realized niche is
A. the fundamental niche is the actual niche that a species occupies while the realized niche is the potential area that the species is capable of inhabiting. B. the fundamental niche is the entire niche that a species is capable of using while the realized niche is just what is being occupied. C. the fundamental niche is smaller than the realized niche. D. the realized niche is theoretical while the fundamental niche is the entire niche that an organism can use.
Four of the five features listed below are found in
sponges. Select the exception. a. mesoglea b. spicule c. gemmule d. flagellated collar cells e. amoeboid cells