A diploid organism that has two identical alleles for a given trait is called _______ for that trait.
A. homozygous
B. heterozygous
C. dominant
D. recessive
E. codominant
A. homozygous
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The sterile portions of a flower are the
a. petals and pistils. b. petals and sepals. c. petals and carpels. d. sepals and carpels
A biogeochemical cycle involves the cycling of a chemical element between the biomass, exchange pool, and ________
Fill in the blank(s) with correct word
Which phylum includes members with radial symmetry that use their two tentacles to capture prey?
a. Cnidaria b. Ctenophora c. Rotifera d. Nematoda
Which of the following is an example of natural selection?
A) depending on the food a turtle eats, it shell may grow faster or slower B) a bird's beak is able to effectively crack the seeds it encounters C) bacteria can be effectively killed by treatment with bleach D) sometime during human's life they break a bone and it heals E) human beings develop freckles from being out in the sun