Which phrase describes how identical twins can result?
a. from the fusion of two paternal gametes with a single maternal gamete that then divides
b. from a lack of chromosomal separation during meiosis, resulting in gametes that are diploid and do not need to be fertilized
c. from the fusion of two sets of identical gametes
d. from a division of a zygote into two separate cells that develop into two separate embryos
Answer: d. from a division of a zygote into two separate cells that develop into two separate embryos
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A microspore develops into a(n)
A. ovule. B. seed. C. sporophyte. D. male gametophyte. E. female gametophyte.
A relationship in which one partner is benefited and the other is unaffected is termed:
A. Commensalism B. Antagonism C. Parasitism D. Mutualism
The eukaryote cell membrane is composed of
A. Sterols B. Proteins C. Phospholipids D. All of these E. Only sterols and phospholipids