Which situation involved mostly biotic factors? * A) A fungus wipes our a bat population, which allows the mosquito population to
increase and spread disease to people

B) Ocean water getting more acidic prevents coral from growing properly, which harms
the coral ecosystem

C) Dust from a volcanic eruption blocks sunlight to Earth's surface, and as a result the
weather is colder

Second question
Which describes a population depending on an abiotic factor? *

1) A bean plant does not grow well because it is planted where there are many weedy
plants.

2) Coral reef organisms carry out photosynthesis using the sunlight that passes through
from the water above.

3) Squirrels eat eggs from a bird's nest.

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i. e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).

All annelids and arthropods have a blank body plan . unlike annelids, arthropods also have blank . the circulatory system of annelids is blank , while circulatory system of arthropods is blank .