The word “echinoderm” refers to

a. rounded skin
b. smooth skin
c. crusty skin
d. spiny skin
e. none of the above


d. spiny skin

Biology & Microbiology

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Epigenetic changes

A) pass from one cell generation to the next but do not alter the DNA sequence. B) do not pass from one cell generation to the next but do alter the DNA sequence. C) irreversibly alter the DNA sequence and are only passed to the next cell generation if they add an advantage. D) alter the RNA codon, which are amino acid assignments of the genetic code.

Biology & Microbiology

Which of the following will decrease blood pressure?

a. increasing heart rate b. increasing stroke volume c. increasing vessel diameter d. increasing stress

Biology & Microbiology

Make a sketch showing how nondisjunction in meiosis can result in Down syndrome. What will be an ideal response?

Biology & Microbiology

Restriction enzymes are "restricted" in the sense that they normally work on only bacterial DNA

Indicate whether the statement is true or false

Biology & Microbiology