Once a pollen tube lands on a compatible stigma
a. chemical cues guide the pollen tube from the stigma to the embryo sac of an ovule.
b. that pollen tube continues on to another ovule.
c. other pollen tubes are attracted to that ovule.
d. other pollen tubes can penetrate that ovule more easily.
e. the flower dies to prevent further pollination
A
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The facial features seen in the child pictured here are characteristic of what syndrome?
1.Down syndrome
2.Trisomy 13
3.fetal alcohol syndrome
4.Cri du chat
A(n) essential amino acid is one that must be provided in the diet. Indicate whether the statement is true or false
The limbs of animals such as whales, cats, bats, and humans contain the same set of bones organized in similar ways yet have dissimilar functions. These structures are said to be:
A) vestigial. B) morphological. C) polygenic. D) homologous.
Without using mathematical symbols, please explain the difference between the broad- and narrow-sense heritability and why one is more relevant to evolutionary studies
What will be an ideal response?