Explanation:
Brain is the most important part of the human body .
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The answer is reproductive isolation. This ensures that there is no viable reproduction between
different species or subspecies. Even if reproduction
between species leads to conception, the embryo may not be able to survive to maturity or will be sterile. This ensures that
species remain integral by restricting gene flow.
Answer:
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere
Explanation:
Answer: B. beta
Explanation:
Sickle cell anemia is a inherited disorder which occur due to mutation of gene responsible for synthesis of hemoglobin protein. Typically the gene which is responsible for synthesis of beta-globin protein which make the beta chains in the hemoglobin is affected by the mutation. As a result of this the red blood cells acquire a shape of sickle rather than round. Pain, cold, stress, dehydration and illness are the symptoms associated with this disorder.
Green algae and land fungi are some of the first land plants to evolve.
