Answer:
Viruses today are not considered living things, since a comparison of archaeobacteria and living things in general cannot have autonomous reproduction methods, if they need to be replicated in a DNA or RNA replication medium foreign to them.
This means that their DNA or RNA cannot replicate by itself, that is why they need to be detected in cells or bacteria (forming bacteriophages) in order to assemble in the DNA of these living beings and replicate in a "hidden" way.
Explanation:
There are cells that recognize the invasion of certain viruses so they self-destruct and do not allow replication of it in the replication of their own DNA, RNA, but there are others that do not, that is why there are viral diseases such as HIV.
On the other hand, in the case of bacteria, they form bacteriophages or form mutations in the DNA, RNA of these living prokaryotic organisms, resulting in more pathogenic or potentially dangerous microorganisms.
Presence of a teratogen in the body of mother during pregnancy is responsible for mal growth of child or incomplete growth which may lead to abortion, still birth or even a defective child.
<h3><u>Explanation:</u></h3>
A teratogen is a substance that is known to cause <em>defects</em> in growth of child during the intrauterine growth period. Thalidomide was used as a morning sickness drug which relieved the vomiting nature of the would be mother. But the presence of thalidomide was responsible for less growth of limbs of the child. Alcohol in intrauterine life may cause Fetal Alcoholic Syndrome which damages the fetus' sense organs and neural cord.
The presence of a teratogen during the 1st trimester is more serious than in last trimester because the main formation of different organs and systems take place in the 1st trimester and maturity takes place in third trimester.
Answer: OPTION E
Explanation:unequal crossover usually leads to duplication or deletion of chromosome. In this case,. A DNa strand is deleted and replace usually by another DNA strand which is mostly a duplicate from a sister chromatid and this process leads to Gene families been produced beause one is deleted and again and again duplicate is produced on the same place (2 product formation). It is a form of chromosomal crossing over that exists between homologous sequence which were initially not paired together. In Gene duplication and mutation in organism, unequal crossover is said to be the pioneer or chief cause of it with Gene conversion beside it.
Answer: the correct answer is A. ACTH
Explanation:
ACTH stands for Adrenocorticotropic hormone Adrenocorticotropic hormone (ACTH, also adrenocorticotropin, corticotropin) is an important component of the hypothalamic-pituitary-adrenal axis and is often produced in response to biological stress (along with its precursor corticotropin-releasing hormone from the hypothalamus). Its principal effects are increased production and release of cortisol by the cortex of the adrenal gland. ACTH is also related to the circadian rhythm in many organisms.
