Phosphorus is often scarce in soils, so a deficiency in phosphorus may limit plant growth. plants need this essential element because it is a component of what organic molecules? (select all that apply.)

Why is a natural ecosystem a open and closed system

How is cytokinesis different in plants and animals? A. In plants, the DNA is one circular chromosome. B. In plants, a new cell wall forms to split the cell. C. In animals, there are no sister chromatids. D. In animals, the DNA is not duplicated.

What is the meadure of the amount of matter in agiven amount of space

As rocks are weathered and eroded, what do wind and water often transport to a new location? A) sediments B) chemicals C) Rock layers D) river system

Fish fall into each of the following categories except which one? A. jawless B. amphibious C. bony D. cartilaginous

What does the electrochemical communication do in the body?

The insertion of the human insulin gene into the bacterium Escherichia coli allowed it to produce human insulin. Which type of organism is E. coli?

When do introduced species become invasive?

If arthropods' appendages were not jointed, how would that affect them?

A student decides to set up an experiment to see if detergent affects the growth of seeds. he sets up 10 seed pots. 5 of the seed pots will receive a small amount of detergent in the soil and will be placed in the sun.