This in counting the age of a tree.

a. rings seen in the stem
b. height of the tree
c. width of a tree

Dna replication allows the basic.units of.heredity found on segments of dna called to be passed on from parent to offspring.

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .

Substance outside the cell are referred to as being? a- both extracellular material and intercellular material are correct names b- intercellular material c- extracellular material d- interstail material e- intercellular material