Which of the following statements about secondary succession is true? a. Secondary succession occurs in ecosystems that have no vegetation.
b. Secondary succession affects ecosystems that are already established.
c. Ecosystems require pioneer species to undergo secondary succession.
d. Secondary succession can occur in areas without soil.

Edgenuity2020

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

(drag each tile to the correct identify which questions can be answered by what can be answered by science or which cannot. -is it right or wrong to use genetic engineering to produce new food products? -what are the most common social settings that tend to produce accomplished artists? -if a new gene is added to the genome of a tomato species, will that species be more resistant to insects? -should humans use biotechnology to bring extinct organisms from the fossil record back to life? -do the types of organisms found in the fossil record appear in consistent sequences in different parts of the world? -are michelangelo's paintings more impressive than rembrandt's?

The distant ancestors of tigers may have had bodies without stripes. use the theory of natural selection to explain how tigers may have evolved to have stripes.