What two conditions must be true for a group of animal to the same species

How are demographics used in biology?

Having freckles is dominant (F). and not having freckles is recessive (f). a mother has FT and a father has Ft. if they have a child, which genotype will make their child not have freckles?

Which letters can be used to model Mendel's cross of true-breeding tall plants with true-breeding short plants in a Punnett square?

Which structure or organelle is found in both prokaryotic and eukaryotic cells?

Which term refers to water's attraction to different substances?

3. How big is the Clark Refractor in Arizona?

Radioactive uranium-235 has a half-life of 704 million years. If it was incorporated into dinosaur bones, could it be used to date the dinosaur fossils?

hurricanes can damage or destroy barrier islands. suppose a barrier island that separates an estuary from the ocean was damaged by a storm: how would this affect the estuary

A cell with a chromosome number of four undergoes meiosis what is the result

How does acid precipitation cause chemical weathering?