Answer:
Astronauts have safety tethers which are the same thing as cords/ropes which prevents them from floating away from the moon.
Answer:
a) Increased heart rate, increased blood pressure, increased respiration rate.
Explanation:
When a person do any physical activity like running, jogging, cycling, swimming and stair climbing, the heart rate, blood pressure and respiration rate of a person are increased because due to physical activity, the body needs more and quick oxygen and energy. This oxygen is provided by heart through pumping of blood and energy is released due to the breakdown of glucose molecules that occurs in mitochondria of the cell in the process of respiration. For providing oxygen and energy quickly, blood pressure of the body is increased.
Hemophilia is a genetic disorder that inherited by X-linked recessive pattern. A daughter needs 2 genes to have the disease(or 1 gene to become carrier) but a son only needs to get 1 defect genes from his mother(X gene in male must come from mother). If Xh defected gene and X normal genes, the <span>punnett square </span>would be:
Father(XY)
X Y
Mother Xh XhX XhY ------>XhX= carrier , XhY= sick
(Xh X) X XX XY ------>healthy
Answer:
macroevolution
Evolution that occurs over a long period of time is called macroevolution. It might take place over millions of years. This scale of evolution occurs above the level of the species.
