Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in heritable traits of a population over time. The term "natural selection" was popularised by Charles Darwin who compared it with artificial selection, now more commonly referred to as selective breeding.
Lipids with a double bond are unsaturated fats, which are healthier than saturated. One example of this would be olive oil (a healthier fat than say, butter)
I think the answer this question is looking for is 'aquifer', but the definition given is not completely correct. Rather than a body of water stored underground, groundwater is often stored in a<span> layer of </span>permeable rock, rock fractures or unconsolidated materials, such as gravel<span>, </span>sand<span>, or </span><span>silt. So the reference to a 'body' of water is misleading, as it give the impression that groundwater occurs as underground lakes or rivers. Although this can sometimes be the case, groundwater often exists in between small spaces in the underlying geology.</span>
Answer:
Anatomical differences between men contribute to an increased risk of ACL injury.
The width of the intercondylar notch in women is smaller than in men.
The transverse area of the ACL is more difficult in men, which may be a smaller diameter of the ACL in women may be a risk factor for rupture.
Additionally the Angle Q (angle between femur and pelvis), whose normal value is 8 to 17 °, is consistently higher in women because on average, the woman's pelvis is wider and the femur shorter than in men. The existence of an increased Q angle increases the medial stress on the knee ligaments.
Finally, in female athletes, the menstrual cycle produces early changes in the synthesis of fibroblasts and procollagen type I in the ACL.
To prevent, the thigh muscles (quadriceps and ischia) and the twins must be specifically worked on. It is also necessary to train the proprioceptive mechanisms of reflex response.
Answer:
Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. When cells divide during meiosis, homologous chromosomes are randomly distributed to daughter cells, and different chromosomes segregate independently of each other.
