The fossil record shows that a type of aquatic arthropod arose 505'440 million years ago and is now extinct. which of today's animals might that ancient organism most resemble?

People with type o blood can be universal donors because their red blood cells do not contain either a antigen or b antigen on their surface.

Malaria is a tropical, mosquito-borne disease caused by a parasitic protist, plasmodium. the species p. falciparum is particularly deadly, killing about 1 million people each year. there has been considerable debate over the origin of this species.

A what can make its own food? a) hetertroph b) auto troph

7) Labrador retrievers have 78 chromosomes in each of their muscle cells. Which biological process ensures that a male Labrador's sperm cells will each have 39 chromosomes? * Mitosis Meiosis Binary fission Budding

Why are phytoplankton important to this ecosystem?

In the DNA chain the nitrogenous base adenine is combined with

Where would you find a stargazer? What did the Greeks call them and why? What do stargazers have to stun their prey? - What other mechanism do they have just behind the operculum and above the pectorals?

Gregor Mendel carried out a cross between two pea plants by taking pollen from a plant that was homozygous for round seeds and dusting the pollen onto the stigma of a plant homozygous for wrinkled seeds.

4 reasons why global warming is a problem

Administration of which classes of medications can decrease secretions of the upper respiratory tract?