Which statement about polyploidy in plants is true?

A. Polyploid plants are usually less vigorous than diploid plants of the same species.
B. Tetraploid and diploid plants of a given species can mate to produce viable triploid offspring.
C. Allopolyploids are hybrid plants that result from the mating of two closely related species.
D. Tetraploid plants can mate with other tetraploid plants of the same species, but not with themselves.
E. Polyploidy is rare in plants.

The endoplasmic reticulum (er) is an organelle in some cells. in these cells, it is continuous with the nuclear membrane and forms a large part of the cell\'s total membrane. sort the phrases below as describing rough er, smooth er, both, or neither. note: if you answer any part of this question incorrectly, a single red x will appear indicating that one or more of the phrases are sorted incorrectly.1) found in prokaryites and uekaryotys2) involved in protein synthesis3) involve in lipid synthesis4) contains molecular chaperones in lumen5) bound with ribosomes6) involved in toxin or drug metabolism7) large systemot internnected tubules,vesicles, and sacs8) "packages" enzymes in vesicles for secretion.

This is one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat