What molecule is created when 4 hydrogen atoms bind with oxygen and 4 electrons

What does it mean when a biologist uses the term crossing-over? why is crossing over a good thing?

What is the difference between saturated fat and unsaturated

How does sympatric speciation differ from allopatric speciation? Sympatric speciation involves asexual reproduction, while allopatric speciation involves sexual reproduction.

What is an animal-like, unicellular protist called?

Describe how some cells came to have chloroplasts, according to the theory of endosymbiosis.

Why are some sediments smaller than others

Ethanol is produced during what cycle or fermentation

Explain briefly why there is a limitation on how big a cell can be. Include in your explanation the relationship between a cell's size and its surface area and how this affects what the cell can do.

Which effect is most likely caused by nondisjunction during meiosis? A. an extra chromosome B. an increase in nuclei C. increased survival benefits from traits D. only two types of nitrogenous bases

A segment of dna that codes for rna and a protein is a