What are hormones?
a. short-range cellular communication
b. made up of lipids and carbohydrates
c. internal growth factors
d. can act as a positive or negative growth regulator
Answer: d. can act as a positive or negative growth regulator
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In a tetraploid species, a euploid individual would have __ sets of chromosomes.
A. 2 B. 4 C. 6 D. 8 E. 2n+2
During transcription,
a. non-coding sequences are removed from the RNA transcript. b. regulatory proteins attach to the DNA at the promotor site. c. DNA polymerase assembles RNA nucleotides. d. the entire DNA strand opens up for complete gene transcription. e. tRNA brings nucleotides to the DNA strand.
The earliest cells most likely ____
a. were prokaryotic cells b. did not have a nucleus but had membrane-bound organelles c. used oxygen gas in order to thrive successfully d. used energy from the sun e. were multicellular
Which of the following animals has an eye with a single lens?
A) Dragonfly B) Jellyfish C) Human D) Butterfly E) Bee