What lethal disease is characterized by homozygosity of the a0-thalassemia gene haplotype in utero?

On the Scottish island of Rum male deer (stags) have larger antlers. The males use these antlers to:

Autoimmune hemolytic anemia represents an abnormality in which:

Male paternal care is most commonly found in:

The fossil discovered in 1860 (one year after the publication of the Origin of Species) and offered clues to how birds had evolved from reptile (dinosaur) ancestors is called:

Please use the following information to answer the question(s) below.   Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of algae to different wavelengths of light. He added aerobic bacteria and then noted in which areas the bacteria congregated. He found that the largest groups were found in the areas illuminated by the red and blue light.   What did Engelmann conclude about the congregation of bacteria in the red and blue areas?

Increases in which of the following hemoglobins can occur in adult patients with sickle cell anemia, thereby improving the anemia by modifying the degree and severity of the sickling?

Which statement(s) help explain why male pipefish produce relatively few sperm?

BONUS: Which is an example of a postzygotic isolating barrier?

Speciation because of geographical isolation is known as: