15. Which procedure would most likely provide valid
results in a test to determine if drug A would be
effective in treating cancer in white mice?
A) injecting 1 mL of drug A into 100 white mice
with cancer and 1 mL of distilled water into
another group of 100 white mice with cancer
B) injecting 1 mL of drug A into 100 white mice
with cancer
C) injecting 1 mL of drug A into 100 white mice
with cancer and 0.5 mL of drug X into another
group of 100 white mice with cancer
D) injecting 1 mL of drug A into 100 white mice
with cancer and 0.5 mL of drug X into 100
white mice without cancer

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

c. heat from the poles back down towards the equator.