The structure in the eye that focuses light onto photoreceptors is the ____
a. sclera
b. pupil
c. iris
d. lens
e. ciliary muscle
d
You might also like to view...
Which of these five evolutionary forces is rare and usually not considered by population geneticists?
A. mutation B. selection C. non-random mating D. genetic drift E. immigration
Circular DNA that is apart from the chromosome DNA in some prokaryotes is called a(n)
A. endospore. B. nucleoid. C. ribosome. D. plasmid. E. nucleus.
Refer to the accompanying figure. Assuming the pattern remains the same, what will the population experience in 50 years?
a. slow growth
b. rapid growth
c. steady state growth
d. negative growth
e. No prediction can be made using these data.
A homozygous tomato plant with red fruit and yellow flowers was crossed with a homozygous tomato plant with golden fruit and white flowers. The F1 all had red fruit and yellow flowers
The F1 were testcrossed by crossing them to homozygous recessive individuals and the following offspring were obtained: Red fruit and yellow flowers—41 Red fruit and white flowers—7 Golden fruit and yellow flowers—8 Golden fruit and white flowers—44 How many map units separate these genes? A) 17.6 B) 15 C) 17.1 D) 18.1