Which is true about the invertebrates?
a. They are all deuterostomes.
b. Among these animals, the initial indentation in the embryonic ball always becomes the anus.
c. All invertebrates share bilateral symmetry.
d. They include the simplest living animals.
e. Invertebrates only have a simple backbone.
D
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Males are often more colorful, larger, and aggressive than females. What is the term for these types of differences between the sexes?
a. male traits b. sexual traits c. sexual dimorphism d. male dominance e. hormonal variance
Which of the following structures gives rise to endosperm?
a. zygote formed from the fusion of a sperm and an egg b. triploid cell formed during double fertilization c. inner wall of the ovary d. cytoplasm of the megaspore e. cytoplasm of the microspore
A primary oocyte is indicated by
a. A. b. B. c. C. d. D. e. E.
If you were following the inheritance patterns of two different sets of multiple alleles located on
different chromosomes, how many different possible gametes could be produced if locus 1 had five possible alleles and locus 2 had six alleles? What will be an ideal response?