Answer:
The correct answer is C
Explanation:
In asexual reproduction method, the offspring generated is identical genetically to the parents. But this is not the case in sexual reproduction. The reason being that the gametes or sex cells produced has only one set of chromosomes and are therefore haploid after the process of meiosis. Meiosis is the process when the offspring formed has chromosomes from two parents and is not identical to the parent. Only certain characteristics are inherited by the offspring from both the parents and offspring has different set of characteristics.
There is a process of assortment taking place inside the cell when the double set of chromosomes becomes one set in a gamete. Out of the pair of chromosomes, there is a random selection. Due to this random assortment, there is a genetic variation between the gametes as the gene alleles on the chromosome are not the same. This principle is said to be the Mendel’s first law of segregation.
Another process of combining chromosomes is the crossing over during the meiosis stage which results in variety of chromosomes. We can say that recombination is possible.
Hence, we can note that during assortment and crossing over, there is no chance for two offspring to be identical to the same mother or father with the exception of identical twins. In the case of identical twins, the genetically identical characteristics develops from same fertilized egg.
From the above process, the structure of gene gets changed creating a variant that can get transmitted to next generation. The change is caused by altering the single base units of DNA or rearranging larger section of genes.
The correct answer is option A
Scientific method is used to answer the question that is based on science. These questions can be answered by the help of various set of protocols which has to be followed one after another.
The protocols has to be followed in a proper manner such as aim, hypothesis, procedure, result and conclusion.
The questions related to ethics does not requires proper experiment. These questions can be answered based on person's opinion.
Amino acids are comprised of a "backbone" that consists of a carboxylic acid (COOH) and an amine group (NH2) linked by a carbon atom. The linking carbon atom is also attached to a lone hydrogen (H) and the functional group of the amino acid.
Hope this helps!
((:
Explanation:
Stress response by the body is regulated by the nervous system. As the day of the exam draws by, the cerebral cortex of the student activates the hypothalamus that triggers hormones to be released that activates the systemic branch of the autonomic nervous and endocrine system (Larissa, 2018). The autonomic nervous system controls involuntary bodily responses such as breathing, heartbeat, and digestion. The endocrine system contains glands that secrete hormones into the bloodstream that regulate the functions of body organs. The student's pituitary gland in response to the activated hypothalamus, which would secrete a hormone which in turn triggers the release of stress hormones from the adrenal glands and it would help the student manage stress by making nutrients available to meet the demand for energy. These hormones activate the sympathetic division of the autonomic system, causing increased heart rate, breathing, and blood pressure and the suppression of digestion (America psychological association, 2019). After the exam, the student is restored to a less tressful state. The parasympathetic branch of the autonomic system would slow the student's heartbeat and breathing and digestive processes would no longer be suppressed and the student gains appetite for food (BcCampus, 2019).
Answer:
1) variable 2) ionic bonding 3) basic solution
Explanation:
1) <em>An experiment in which an observer tests a hypothesis by looking for </em><em>changes</em><em> brought on by </em><em>alterations to a variable</em><em>. In a controlled experiment, an independent variable is the only factor that is allowed to be adjusted, with the dependent variable as the factor that the independent variable will affect.</em>
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2) <em>Ionic bonding </em><em>is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. </em>
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3) <em>A solution with a high number of hydrogen ions is acidic and has a low pH value, known as </em><em>basic solution</em>
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