Lancelets are
a. fish shaped.
b. filter feeders.
c. three to seven centimeters long.
d. burrowers in shallow sediments.
e. all of these.
Answer: e
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Adult insects exchange respiratory gases primarily by means of:
a. spiracles only b. tracheal tubes and spiracles c. lungs d. gills e. body surface
RNA polymerase has several jobs during the transcription process. Which of the following is not a job that it performs?
A. RNA polymerase binds to the promoter region to start transcription. B. RNA polymerase unwraps small segments of DNA to expose the template strand to be transcribed. C. RNA polymerase edits the mRNA strand by removing some sections and splicing together remaining sections. D. RNA polymerase makes a complementary mRNA strand by adding RNA nucleotides.
The atomic number denotes the number of ____ in an atom of a particular element
a. electrons b. neutrons c. energy levels d. protons e. isotopes
Which genotype would have an advantage if a recessive allele changed cellular proteins that led to circulatory problems and premature death?
A) Any homozygous individual will always have an advantage over any heterozygous individual. B) Any heterozygous individual will always have an advantage over any homozygous individual. C) Any homozygous dominant individual will always have a disadvantage compared to any heterozygous individual. D) Any heterozygous individual will have an advantage over any homozygous recessive individual.