What is one reason some leaves are spiny, or needle-shaped? A. to increase the rate of formation of food in leaves B. to reduce water loss from leaves in dry climate C. to store food in dry climates?

What visual clue indicate that oxidation is occurring

What important event took place in land plant evolution in the Miocene Epoch that influenced the evolution of the ungulate mammals, such as the horses?

The temperature of four ponds was measured at 6:00 am. which of the ponds would probably have the highest dissolved oxygen concentration? four ponds a. pond a b. pond b c. pond c d. pond d

A scientist discovers a cell that has chloroplasts, cytoplasm, DNA, and a cell membrane. Which statement best describes how the cell could be classified?

Chemical weathering is also called physical weathering. true false

Which of the following is a constructive process? deposition detachment transport plucking

Coal deposits were formed from? A. Plant life in ancient B. Ancient plankton and marine life C. Freshwater organisms from the last 100,000 years D. Modern plants and animals

According to the Hardy-Weinberg principals, which of the following can prohibit genetic equilibrium?

Rickettsia are obligate intracellular parasites that are transmitted by arthropods. In which of the following places would you most likely find the parasites living in the host organism during the course of infection? A.

How are viruses able to move between species?