Can a mutation be beneficial to an organism

8. Explain why ice stays at the top of oceans instead of sinking to the bottom. Also, explain how this supports life on Earth.

latrotoxin produced by widow spiders causes several effects, one if which is to increase the release of ACh at the synaptic cleft. what effect do you think this action would hae on muscel fibers

Purple flowers are dominant over white flowers. A heterozygous purple flower is crossed with another heterozygous purple flower. The ratio of purple to white would be what?

Which is not correct about trichinosis? it can be transmitted by eating undercooked pork. it can be transmitted by eating bear meat. only a few cases occur each year in the u. s. the first symptoms mimic influenza.

What allows water molecules to stick together so they can be pulled upward by the force of transpiration

When a bird eats a small insect it can be considered a secondary consumer but what is the bird considered as when it eats seeds?

Desert animals, such as the kangaroo rat, need to conserve water. These animals have larger kidneys than do animals that live in moist environments and thus need not conserve water.

What is the function of a nucleus in a cell the nucleus A. controlls the cells activity B. the nucleus identifies the cell as belonging to a plant C. the nucleus determines what substances enter and leave the cell D.

Which best describes emerging scientific ideas? a. never been tested b. unpublished c. supported by most, but not all, scientists d. not studied by many scientists

A sonic boom is produced by a jet. What can you determine about the jet's motion? a) It is near a mountain where echos can be produced b) Its engines produced backfire c) It is increasing in altitude d) It is traveling faster than the speed of