Which statement below is TRUE?

a. During meiosis, cells arrange their alleles so that beneficial alleles are passed on together

b. Crossing over shuffles genes between non-homologous chromosomes

c. Without crossing over, offspring would be genetically identical to parents

d. New combinations of alleles arise from random events of crossing over, independent assortment, and mutation

After getting the slide and microscope ready, stella is eager to see the microscopic pond water specimen! she crouches around her microscope and aligns her eye with the microscope’s eyepiece. but she's only able to see a bright white light. at this point, no specimens or cells are visible on stella's pond water slide. after taking a moment to collect her thoughts, stella realizes she can't see any lifeforms because .

The intervention of extraterrestrials has been used to explain the bermuda triangle, a region of the atlantic ocean where ships and planes are frequently lost, leaving no evidence behind. how would this explanation best be characterized?

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material