What is the half-life of the radioactive isotopes? a. A radioactive isotope decreased to one-half its original amount in 18 months.

If Prairie grasses are removed from an area, what affect will this have on the soil in the area?

Which organelle makes the protein that are needed by the cell

Is asexual reproduction used by all organisms, including humans?

Which of the following best describes a gene?

How many species of animals havebeen extinct?

Which life cycle describes a plant that reproduces asexually and sexually? A. egg + sperm → embryo → adult with all its chromosomes → gametes → adult; gametes produce an organism with half the chromosomes B.

What would happen to the mass of a cell in a hypertonic, isotonic and hypotonic?

How do air and water movement, and land masses affect the climate

Under what circumstances does membrane transport always require energy?

What is one disadvantage of using plasma gasification to detoxify hazardous waste?