Answer:
C.
Explanation:
Homeostasis refers to the tendency for the human body to attempt to maintain a certain state even during changes in environment, activity, intake, etc. Options A, B, and D all refer to instances where the body departs from its usual state. While the scenario in Option C does describe a change in environment, it also describes the reaction of the body that brings its internal systems back to a certain state of fluid level.
Robin can have a ddt concentration of 444ppm while the ddt concentration of soil is 10 ppm. This happens due to biological magnification.
<u>Explanation:</u>
In biological magnification the concentration of toxic substances at successive trophic levels keeps increasing. Due to biomagnification, what starts out as a small concentration grows while moving to successive trophic levels. DDT is a pesticide which is used to kill pests that affect crops.
DDT used in farms gets deposited in the soil. From the soil it can reach various trophic levels. At each trophic level its concentration keeps increasing.
Robin is a bird that is a secondary consumer and thus belongs to the higher trophic level. Thus even if the DDT concentration is as low as 10ppm in the soil its concentration will keep increasing and can become a high value like 444ppm.
8 molecules would result, since 2^3 = 8. Each time PCR is performed, the orginal number of molcules double.
Answer:
Bacteria
Explanation:
The organism is bacteria because it performs photosynthesis and can propel itself with flagella. It is not an animal because it can photosynthesize and it is not a plant because it has flagella like bacteria does.
Answer: 4; tt
Explanation: The two lowercase letters indicate that there are two recessive genes. If there is one uppercase letter and one lowercase letter, that would mean that it is heterozygous (as there is one dominant and one recessive gene).
