Many children were paralyzed by polio in the 1950s. Today, polio has been reduced by 99 percent. Which statement best explains how this disease has been almost eradicated?

A plant's water supply is now deeper in the ground. By which process do the roots grow longer to reach the water?

Which prediction best describes the allele frequencies for F3 generation

Are bacteria and humans structured the same or different? Explain.

Which of these statements if true about viruses? A) it is unicellular in nature and it reproduces asexually B) it can reproduce only within other cells C) it's hereditary material is in the form of a capsid

An event during which many types of living things suddenly die out is called a (n)

Plant species A has a diploid number of 12. Plant species B has a diploid number of 16. A new species, C, arises as an allopolyploid from A and B. The diploid number for species C would probably be A) 12. B) 14. C) 16. D) 28. E) 56.

Which seedless plants have been used to treat burns? club mosses mosses ferns horsetails

Ecosystems have trouble adjusting to short term changes t f

Since the llamas will not sell well with malformed feet, you decide to select the herd against this defect.

Flattened membranes that package cellular substances for export are called