Which of the following is a diploblast?

a. A comb jelly
b. A goat
c. A spider
d. An octopus


a. A comb jelly

A comb jelly is a diploblast. Animals that exhibit radial bilateral symmetry, like comb jellies and cnidarians have two germ layers during embryonic development.

Biology & Microbiology

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A family can share a genetic risk of developing cancer if:

A. the cancer is caused by somatic cell mutations. B. the cancer is caused by germ-line mutations. C. a germ-line mutation in one of the genes implicated in the cancer occurred in an ancestor. D. a somatic cell mutation in one of the genes implicated in the cancer occurred in an ancestor. E. All of the answer options are correct.

Biology & Microbiology

The White Cliffs of Dover, a famous landmark in England, is made of limestone, which is really a collection of the pore-studded shells (tests) of  

A.  diatoms. B.  dinoflagellates. C.  brown algae. D.  spirochetes. E.  foraminifera.

Biology & Microbiology

These two species of velvet walking worms are an example of:

1.Allopatric speciation 2.Sympatric speciation 3.parapatric speciation 4.Hardy-Weinberg equilibrium

Biology & Microbiology

What is one difference between polyploidy and aneuploidy?

A) Polyploidy is extra sets of chromosomes; aneuploidy occurs when there are either more or fewer chromosomes than normally exist in its species full set. B) Polyploidy is one extra chromosome; aneuploidy is one missing chromosome. C) Humans can be viable as polyploids but not as aneuploids. D) Polyploidy is extra sex chromosomes; aneuploidy is extra autosomes. E) Polyploidy causes diseases and disorders in humans; aneuploidy does not.

Biology & Microbiology