Answer:
DIFFUSION
Explanation:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
<span>For question 1: we know the vA=10.0 cm3 and the m=89.6g. Using the equation D = m/vA give us: D = 89.6/10 = 8.96 g/cm3. Answer is (C) 8.96 g / cm3.
For question 2: We know the vA=1.2 cm3 and the D=.6 g/cm3. Using the equation D = m/vA and rearranging for m gives us m = D*vA: m = .6 * 1.2 = .72 g. Answer is (D) .72 g.
For question 3: We know the D = 8 g/cm3 and the m = 600g. Using equation D = m/vA and rearranging for vA gives us vA = m / D: vA = 600 / 8 = 75 cm3. Answer is (A) 75 cm3.</span>
Answer:
OC
Explanation:
Primary succession begins after a new habitat is opened that was previously unavailable- for example, lava flow that left behind bare rock. This successions normally begins with organisms like lichens, which are able to survive in these conditions. It has no soil and was previously uninhabited.
Secondary succession begins as a response to a disturbance that clears a previously inhabited area, like a forest fire or tsunami. This may cause a lot of destruction and death, but afterwards there is still soil available for new plants to grow again. Eventually, the habitat will regrow itself.
Answer:
B. False
Explanation:
Rats (and all other rodents) need to gnaw because their teeth never stop growing. They need to be worn down, otherwise they will grow so that they A. grow into the brain, or B. Prevent the animal from eating = starvation
Answer:
1) Index fossils are of organisms that lived over a wide area. They lived for a fairly short period of time. An index fossil allows a scientist to determine the age of the rock it is in.
2) Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages.
Explanation:
