Which of the following farming practices use water most efficiently? select two

-tilling soil

-planting perennial crops

-using drip irrigation

-planting annual crops

-using sprinklers

Where does each chromosome in a pair of homologous chromosomes come from?

Which form of Kepler's third law can you use to relate the period T and radius r of a planet in our solar system as long as the unit year is used for the period and astronomical unit is used for the radius? A. T = r² B. T² = r C. T² = r³ D. T³ = r²

In the kidney both useful and wasteful substance are removed from the blood by

scenario b: Hector is a high school student who was given an assignment to draw and label an animal cell.

The first step a biologist takes when deciding how to study life is to? A - write a paper B - make an observation C - do an experiment D - make a hypothesis

When individual components in an organism interact with each other or the environment to create novel structures and functions, the resulting characteristics are calles properties

Which of the following is a structure that is found in the seeds of angiosperms and that often functions as a food storage organ? xylem taproot bryophyte cotyledon

Which domain (s) include species whose cells have cell walls?

When did Wallace and Darwin go on their research expedition

Which two organisms likely have the most similar cell structure?