Describe the difference between a closed and an open circulatory system.

Which of the following uses of grasslands is least harmful to the ecosystem? plowing it for crops using it for range land developing commercial areas importing foreign animals to use the grasslands as a habitat

If a tree falls in the middle of the woods can u here it fall

What trade did the Northeast woodland Indians have in common with a South East Indians

Describe the main difference between weather and climate.

Cell biologist, Dr. Martine Dinen, is observing an organism's cell using a transmitting electron microscope. She notices that within the cellular membrane, strands of DNA are seen throughout the cytoplasm.

The following structures are found on the underside of fern leaves and contain sporangia: sori rhizomes megaphylls microphylls

Which process allows more light to reach the periphery of the retina?

Why did it take 50 years for Darwin's ideas to have an impact on Biology?

Which of the following is NOT an age-related change affecting the heart? A. decline in cardiac reserve B. fibrosis of cardiac muscle C. atherosclerosis D. thinning of the valve flaps

When they match is burn chemical and potential l energy is converted to thermal and