Examples of stimuli are the weather, sound, the cold, light, taste, color, and gravity.
- When you hear a loud noise you get scared and scream
- When it is hot outside you sweat
If one parent has been affected by sickle cell anemia, while the other parent does not and is homozygous, the chances that a child will have this disorder is 0%. Thus, the correct option is C.
<h3>What is Sickle Cell anemia?</h3>
Sickle Cell anemia may be defined as a genetic disorder that is caused by a recessive allele. It is an inherited disease in which the red blood cells have an irregular crescent shape, obstruct small blood vessels, etc.
This disease is inherited when both genes of each parent are supposed to be defective or carriers. While in this case, only parents are affected by the disorder while the other is homozygous for the normal allele.
In this condition, all the offspring produced by both parents remain as carriers but not affected ones.
Thus, the correct option is C.
To learn more about Sickle cell anemia, refer to the link:
brainly.com/question/17063471
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Answer:
Limited food supply and competition
Explanation:
Density dependent factors are those which in general lead to reduction of growth rate of population when the population density increases. One of such factor is availability of food and competition.
Whenever the density increased to an extent where the resources or available food becomes scarce or limited,then the growth rate of population decrease. These factors generally lead to logistic growth pattern of population.
The correct answer is D
As compared to nuclear DNA, the mtDNA (mitochondrial DNA) experiences very less mutations. Due to this slow mutation rates, it does not change much over the time. It makes it a good candidate for studying the evolutionary relationship between the species.
In addition, it is mainly inherited from mother’s cytoplasm which also allows the scientists to trace back the maternal ancestral lineage.
