What type of tissue is the heart made of?

Which describes a way that pathogens can be spread?

How are living things classified in the environment where they live?

Over the course of about 100 years a pond can fill in with soil and dead plant material. What is this process called? A. Ecological devastation B. Ecological succession C. Ecological equilibrium

Darwin and Haeckel used the analogy of a wheel to represent phylogenies.

In both of these biomes, the life forms or biosphere, are limited greatly by the interaction or lack of interaction with another of Earth's spheres. What sphere is that?

For water to enter the ground there must be?

According to endosymbiosis theory, what is the most likely explanation for the origin of the two mitochondrial membranes

What is the biological significance of the elephant graveyard in the movie "The Lion King"?

In fruit flies, the gene for red eyes (r is dominant and the gene for sepia eyes (r is recessive. if a red-eyed heterozygous fly (rr mates with a sepia-eyed homozygous fly (rr, what are the possible genotypes of their offspring?

Who is the father of modern day genetics