What forms of life were present during Earth's first age, the Hadean era?

A. Crustaceans and fish but no land animals

B. Bacteria

C. The same life that is present today

D. None

Give four example of species (animal or plant) that are over utilisation

How is a terrarium different than an aquarium?

How do you think plant cells differ from animal cells? (hint: what can plants do that animals cannot?)

A group of field biologists goes out to mark beetles living in an area around a local pond in order to estimate population size. They capture 500 beetles on the first day.

What is the most common greenhouse gas produced by human activities

What are earthquakes?

During which trimester is the fetus most susceptible to the detrimental effects of alcohol on its development? a. first b. second c. third d. risk is equal during all stages of development.

What are some structural explanation for why animal and plant cells differ in response to changes in the extracellular space?

Which teeth are used for tearing food apart and are obvious in meat-eating animals?

If bluefish contains 0.336 ppm of mercury (that is, 0.336 oz of mercury per 1 * 10 6 oz of fish), how many ounces of mercury would a pregnant woman consume in a month if she ate the maximum recommended amount of bluefish?