The deuterostomes are animals whose
(a) stomach is in front of the crop.
(b) mouth is covered by a fleshy lip.
(c) blastopore becomes the anus.
(d) digestive tract is lined by mesoderm.
(c) blastopore becomes the anus.
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Seedless bananas are produced from
A) sterile tetraploid allopolyploid plants. B) sterile triploid autopolyploid plants. C) monoploid plants grown from unfertilized seeds. D) fertile diploid plants that are unfertilized. E) Both C and D
When we use the Shannon diversity index to calculate the effective number of species, we are determining how many species would provide that same diversity value:
A. if the species were similar types of organisms. B. if the populations were equally productive. C. if the individuals were evenly distributed spatially. D. if the populations were all the same size.
Why do harmful agents cause the most severe birth defects during the embryonic period?
A) The mother's hormones are at the highest levels at this time. B) The embryo has not yet implanted into the uterus. C) This is the period when substances pass most easily through the placenta. D) This is a period of rapid differentiation when cells and tissues acquire specific functions and organs form.
A group of individuals that can interbreed in nature and produce viable offspring would be considered to be a species according to the
A. general lineage concept. B. evolutionary species concept. C. biological species concept. D. ecological species concept. E. phylogenetic species concept.