What are the results of double fertilization?
A) Egg cell and sperm cell
B) Diploid zygote and diploid endosperm
C) Embryo sac and pollen sac
D) Triploid endosperm and diploid zygote
E) A zygote and an embryo
D
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Discuss how geneticists have concluded that the X-linked form of hemophilia that spread through the royal families of Western Europe and Russia in the nineteenth and twentieth centuries probably originated with Queen Victoria
What will be an ideal response?
Malthus' idea that was incorporated into the natural selection summary by Darwin suggested that limited resources
A. preserve harmful variations and eliminate favorable variations in a population. B. eliminate both favorable and harmful variations in a population. C. preserve favorable variations and eliminate harmful variations in a population. D. preserve favorable and harmful variations in a population. E. neither preserve nor eliminate harmful variations in a population.
The structure of phospholipids includes a water-soluble phosphate group and water-insoluble fatty acid tails.
a. true b. false
In which phase of meiosis I do homologues separate?
A) metaphase I B) anaphase C) prophase II D) anaphase I