Answer:
Long tail and narrow head.
Explanation:
A sperm cell is adapted to reduce friction as it swims by having long head, narrow tail and enzymes. These features of sperm provides ability to swim straight to the egg cell. Long tail helps the sperm cell to swim towards the egg cell, narrow head of sperm cell make the sperm cell for faster swimming towards the egg cell and enzymes present in the head of the sperm helps break through the egg cell membrane so we can say that the long tail and narrow head of sperm cells helps in faster swimming.
Commensalism<span>, in </span>ecology<span>, is a class of relationships between two organisms where one organism benefits from the other without affecting it. This is in contrast with </span>mutualism<span>, in which both organisms benefit from each other, </span>amensalism<span>, where one is harmed while the other is unaffected, and </span>parasitism<span>, where one benefits while the other is harmed.</span>
Answer:
See below
Explanation:
Marie Curie died of aplastic anemia in 1934. Aplastic anemia is an autoimmune disease in which the body fails to produce blood cells in sufficient numbers. Blood cells are produced in the bone marrow by stem cells that reside there. Aplastic anaemia causes a deficiency of all blood cell types: red blood cells, white blood cells, and platelets.
Fatigue is a symptom of aplastic anemia as the blood doesn't have the necesarry red blood cells to transport the oxygen to the organs.
Rapid heart rate happens because the body senses the decrease of oxygen's concentration and the hearts beats faster to provide the organs of oxygen.
Pale skin happens because the blood vessels are contracted in order to provide oxygen to the important organs of the body as the brain and heart. It means that less blood reaches the face and it shows as pale skin.
Prolonged bleeding from cuts happens because there aren't enough platalets to produce a blood clot to stop the bleeding.
Dizziness happens because there is not enough oxygen arriving to the brain.
If she is A negative, she can only receive blood from others A negative donors, or O- donors. This is because she has antibodies to B, and to groups that have the protein Rh (+). So she can't receive blood either B nor Rh+.
What <span>scientists are trying to understand about the climate of earth by analyzing these ice samples is changes in atmospheric gas composition.
By examining small pockets of air trapped deep within frozen glaciers, these scientists want to see whether or not, or how gas composition within these glaciers changes and how it affects the atmosphere that surrounds our planet.
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Answer:
The correct answer will be-
1. Genotype of parents (gametes)
2. Genotype of offsprings
Explanation:
Punnett square is the simple graphical way of understanding and predicting the mathematical probability of the inheriting traits of individuals developed by the Reginald Punnett in the 20th century.
The method was used by the Gregor Mendel in his experiments on pea to understand and predict the inheritance pattern.
The Punnett square is constructed by drawing grid perpendicular lines and then putting the genotype or the genetic contribution of one parent on the top side and another parent on the other side. Calculating the genotype of offsprings is represented inside the grid lines.
