A mutagen is

a living thing that has undergone a mutation.

an agent that causes a mutation in DNA.

a mutation that has affected one gene.

a chemical that can poison living cells.

Una cadena alimentaria para un animal del zoológico?

Using a simple food chain what is the order or sequence of energy transfer?

What do all plant life cycles have in common? A. Fertilization produces seeds. B. Sperm cells are carried by the wind to egg cells. C. Diploid and haploid phases alternate. D. Sporophytes are formed by meiosis

Prior to the industrial revolution in England the peppered moth had light coloration and lived on trees covered with light colored lichen. This provided camouflage against predatory birds.

Genetic variations in natural populations develop due to A. change in the environment B. random mutation C. environmental catastrophes D. change in diet

The process of chemical cycling is known as a biogeochemical cycle because it a. takes places over a long period of time b. withdraws the chemical form the atmosphere as a gas c. absorbs the chemical involved from the sediment d.

What step first happens in DNA replication?

Why was Charles Darwin considered to be a revolutionary?

In addition to observing wind speed, wind direction, temperature, air pressure, and humidity meteorologists observe ...

What features of Therapsids suggest the group was transitional to reptiles and mammals?