Lycophytes, ferns, and horsetails disperse via:
A. sperm.
B. seeds.
C. fronds.
D. spores.
E. thalloids.
D
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Microfilaments such as actin, microtubules, and the intermediate filaments form the cell-supporting structure called the:
A. cytoplasm. B. nucleus. C. plasma membrane. D. cytoskeleton.
Your biology instructor has assigned you a lab exercise to test a hypothesis regarding the inheritance of stem length in pea plants. If your assignment is specifically to conduct a monohybrid cross for stem length from available genotypes growing in the lab, which of the following crosses should be performed?
A. Tt with tt B. Tt with TT C. Tt with Tt D. tt with tt E. TT with TT
Certain complement components stimulate inflammation and phagocytosis.
Answer the following statement true (T) or false (F)
Let S = smooth pea and s = wrinkled pea; Y = yellow pea and y = green pea. What are the different possible genotypes of the gametes produced by a plant that is heterozygous for both characters?
A) All will be SsYy. B) S, s, Y, y C) SY, sy D) Ss, Yy E) SY, Sy, sY, sy