Answer:
they carry out experiments to understand it
Explanation:
Scientists raise hypotheses which are tested by experiments made under controlled conditions in order to explain a particular topic. When a hypothesis is confirmed by the experimental data, the evidence obtained from this experiment provides the basis to increase the scientific knowledge about a particular issue. In consequence, experimentation can be considered as a critical step in the scientific method and research aims to advance knowledge of a particular phenomenon by confirming a hypothesis, which must be testable (i.e. verifiable as a result of further experimentations).
The role of mass extinction in evolution. At the most basic level, mass extinctions reduce diversity by killing off specific lineages, and with them, any descendant species they might have given rise to. ... But mass extinction can also play a creative role in evolution, stimulating the growth of other branches.
The answer is A. antioxidants. Antioxidants is the defense
system of the body, it is also the involved prevention of the damage of the
cell; examples are aging, common reason of cancer and also different kinds of diseases.
There’s always a need to have antioxidants because our body needs protection
for the damage by the oxidation may cause.
Hemophilia is the result of a defective X chromosome. males have XY chromosomes; females have XX chromosomes. If a man has a defective X chromosome, he has no normal X chromosome to balance it out. Therefore, he is more likely to present hemophilia. However, a hemophiliac man's male children will all be healthy, assuming his partner is not a hemophiliac, because the defective X chromosome was not passed on. All his daughters will be carriers, though, regardless of whether their mother is a hemophiliac.
