How are scientist able to compare DNA from bones or teeth to that found in hairs on a hair brush?

What is the ratio of patients who get infectious in hospitals 1 in 25 1 in 50 2 in 77 1 in 100

on stages 13 (28 days) and 20 (50 days), and compare limb development at these stages. and thee answer for this is In stage 13, all four limb buds are present. In stage 20, the upper limbs are slightly bent at the elbow.

Process in which one strain of bacteria has been changed into another

Can a person get arthritis at 13

Suppose that an adult black bear adds 50 pounds of fat in order to survive while hibernating through the winter. how much glycogen would a bear have to add to achieve a similar feat?

List 4 observations that indicate that a chemical reaction may be taking place

Which statement describes the light reaction of photosynthesis? A. Water molecules are combined to make food. B. Air and water create energy for a plant. C. Carbon dioxide is put together with glucose. D. Water molecules are split apart.

4. Where are the two places we find receptor proteins? Inside the target cell, target cell plasma membrane Signaling cell plasma membrane, inside the target cell Signaling cell plasma membrane, ligand Target cell plasma membrane, signaling cell

What most directly causes hypertension? lack of blood flow to the heart a weakening of a blood vessel wall excessive force of blood pumping injury to heart muscle

On the coast, strong sea breezes move cool air into the land to replace warm, rising air. This often causes A) cyclones. B) hurricanes. C) thunderstorms. D) tornadoes.