The human body comprises of more than 600 muscles differentiated in three classifications, and all are under the control of the nervous system. The activities like picking up a dropped pen or leaning over incorporate the combined effort of various muscle groups.
The alert mind relays this instruction to the central nervous system that conducts it in the form of electrical impulses. These are then mediated via the somatic segment of the peripheral nervous system to the nerves accountable for monitoring the essential muscles.
When the signals arrive, a chemical known as acetylcholine gets discharged from the nerve terminals, activating the membranes of muscle fibers and making them to contract. The receptors present in the muscles provide the brain with the instruction regarding the movement and position of the body, the brain monitors the contraction of skeletal muscles.
Explanation:
You depend on each other and need the nonliving things in your home, like food, water, air, and furniture. Living things need nonliving things to survive. ... They are food for many animals. Plants use water from the soil, carbon dioxide from the air, and energy from sunlight to make their own food.
Note: Question is incomplete i have added full question in this section as i was not able to add in ask for detail section.
Full Question
Which of the following statements BEST reflects the extent to which we can distinguish the effects of genes and the environment on the expression of a complex trait?
A. If one individual is 60 inches tall and another is 70 inches tall, they differ in about 80% of their genes.
B. None of answer options is correct.
C. For identical twins raised in the same environment, height should not differ by more than 20%.
D. In a group of individuals of the same sex, about 80% of the variation in height among individuals is due to genetic differences and 20% is due to environmental differences.
E. About 80% of an individual's height is determined by genes and 20% by environment.
Answer:
Option D. In a group of individuals of the same sex, about 80% of the variation in height among individuals is due to genetic differences and 20% is due to environmental differences.
Explanation:
Because genetic variations are more common and prominent as traits flows from one generation to next generation while environmental difference are just only exist in that particular environment.
A method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
