What must first form before plants can colonize new land?

Which of the following terms describes a group of scholars who jointly study one issue? think tank thought cloud working group innovation group

Which of these changes is a benefit of using only nonpolluting sources of electricity? A. Fewer cases of asthma B. Loss of jobs related to fossil fuels C. Higher electricity prices D. More-expensive clean technologies

What are nucleic acids

Which is a structure that directs the cell's activities? O nucleus o Golgi apparatus o ribosome mitochondrion

What is an example of temporal isolation? A. flowers that bloom in different months B. birds that have different mating calls C. fruit flies that mate in different locations D. squirrels that have different fur colors

Which of the following is an advantage of nuclear energy over fossil fuels? A. Eliminates the need for mining. B. Uses a renewable energy source. C. Releases less CO2 waste products. D. Releases more CO2 waste products.

A cell with 46 chromosomes inside itsnucleus goes through one round of mitosis and cytokinesis. How manychromosomes are inside each of the two resulting nuclei?

The theory that explains how the earths surface is made up of moving rocky plates is called: A. Supercontinent B. Plate tectonics C. Sea floor spreading D. Continental drift

10. Which of the following is an emerging dis- ease that was unknown 50 years ago? a. malaria b. dengue fever C. Lyme disease d. schistosomiasis

What are the agents for deposition