Answer:
No, they are not. The concept of human races appears to be solidly grounded in present-day biology and our evolutionary history. But if you asked that conference of geneticists to give you a genetic definition of race, they wouldn’t be able to do it. Human races are not natural genetic groups; they are socially constructed categories. Genes certainly reflect geography, but unlike geography, human genetic differences don't fall along obvious natural boundaries that might define races.
Answer:
D
Explanation:
Atomic radius is the distance from the atom's nucleus to the outer edge of the electron cloud. In general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant.
<span>1. Two-year old Zack has an inherited disorder in which his body cannot break down fat. He will probably die by the time he is four. Zack is most likely suffering from:
a. phenylketonuria.
</span><span>
2.
The first two weeks of a pregnancy, from conception to implantation, are known as the _____ period.
Select one:
b. germinal
3. Which of the following is TRUE of transcranial magnetic stimulation (TMS)?
a. It uses an electrical current.
4. Drive-reduction approaches to motivation are:
Select one:
c. theories suggesting that motivation stems from the desire to obtain valued external goals.
</span>
D - an increase in tree cover in the tundra.
Answer: The taproot
Explanation: A deep taproot helps plants use moisture held in deeper soil layers, and they can have great drought resistance compared to fibrous-rooted plants. An example is honey mesquite (Prosopis juliflora), which is known to send its roots down 150 feet to get water.
