The width of the pyramid at each trophic level represents the number of organisms at that level. True or False?

Tentacles can sting predators. What other functions do tentacles have? Choose all answers that apply. A. to bring oxygen into the cnidarian's body B. to aid reproduction C. to communicate with other cnidarians D. to capture food

Choose all that apply. What European goods were exchanged for African slaves?

The gull eggs are 30,234 times more contaminated with PCBs than the phytoplankton. A:True B:False

What do the letters in each box of the punnett square tell you

How many groups did Aristotle use to divide all the organisms in the world?

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