How many chromosomes do human gametes normally contain?

Clearly cellulose is very abundant on earth, and it is a long-lasting stable substance. Many animals cannot digest cellulose. Given this, what prevents the bodies of dead plants from filling the earth? Something must decompose cellulose.

How is an ecomorph different from a species?

Suppose that in a lab you could remove all the oxygen from a terrarium. What would happen to the plants? Why?

The graph illustrates the trend in number of species in two different ecosystems. Select the statements that are supported by the data on the changes in each ecosystem

What is the best topic to choose for a science fair project

Explain the goals of a sustainable development.

When are to animals classified as belonging to the same species?

Process of biological change by which descendants come to differ from their ancestors

What types of cells would be produced by meiosis?

Gregor Mendel studied the inheritance of traits in pea plants. One trait he examined was the height of the plant. Pea plants with the dominant 'T' allele grew tall, and pea plants with the recessive allele 't' were short.