Answer:
The situation in which some individuals have greater reproductive success than other individuals in a population. Along with variation and heritability, it is one of the three conditions necessary for evolution by natural selection.
There are so many factors that contributed to this over time, reproductive success differs and it could be attributed to hereditary and variation as well. Most often, the hereditary plays the most role out of all as the viability of both eggs and sperms could have been inherited from parents or being affected as a result of environmental factor or nutrition or other factors.
For instance, if one has a rhesus factor of negative and went ahead to marry another male counterpart with negative rhesus factor, this sedomly leads to miscarriage which could have been controlled had it been they were thoroughly counseled. Furthermore, physical factor such as accident could damage one spermatical vessicles that houses the sperm cells which render such an individual to be unable to donate a viable sperm cell for reproduction.
Those with high rate of reproductive success thrives as result of having many offspring which increases their chances of having more offspring than those with little success rate.
Explanation:
Crossed-extensor reflex prevents you from falling when you suddenly lift one foot off the ground in response to pain.
- A withdrawal reflex is the crossed extensor reflex. In the withdrawing limb, the extensors relax while the flexors contract, but in the other limb, the opposite happens.
- This can be seen, for instance, when someone steps on a nail; the affected leg pulls away, while the other leg bears the weight of the entire body.
- Contralateral means that the crossed extensor reflex takes place on the side of the body that is opposite from the stimulus.
- Afferent nerve fiber branches travel from the stimulated side of the body to the opposite side of the spinal cord to cause this response.
- They make connections with interneurons there, which then stimulate or inhibit alpha motor neurons to he muscles of the contralateral limb.
learn more about Crossed-extensor reflex here: brainly.com/question/23243906
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i believe is liquid , because liquid takes time to leave and disappear.
Answer:
The correct answer is - 1) independent 2) X.
Explanation:
independent variable is the variable or the factor that is altered or made constant or controlled to see or test the effect on the dependent variable in an experiment. Time is used in the experimental protocols in such a manner that it is considered as the independent variable.
In a graph, time is always plotted in the X-axis as independent variables are normally plotted horizontally in a graph.
Thus, the correct answer is option - 1) independent 2) x.
