For, the contour interval on a topographic map is 50 meters, how much difference in elevation do 12 contour lines represent

Which of the following are necessary for a seed to germinate? moisture content of seed must be at least 9% Moisture content of the seed must be less than 9% certain enzymes in the seed are activated temperature must be above 80 degrees temperature

Which of the following is a characteristic of an ionic bond? A. An element shares electrons with another element. B. An element loses a proton to another element. C. An element gains a proton from another element. D.

Where is the sunfish mola mola on the food chain?

The whooping crane is an endangered bird species that lives in Texas for part of the year. This type of bird only lives in marshes.

Who is responsible for determining the structure of the dna molecule

Match each product of pyruvate metabolism with the condition under which it is produced.

Which of the following best describes calcitonin? A. It's released by the adrenal medulla. B. It's released by the parathyroid gland. C. It functions to prevent hypercalcemia. D. It functions to prevent hypocalcemia.

Smooth muscles are slow to relax and slow to contract. explain why this is and why this is important.

In industrialized nations, childhood diseases have declined dramatically during the past half-century, largely as a result of

Where do greenhouse absorb radiation from?