Answer:
100 units
Explanation:
The parent cell holds 200 units of DNA. During the process of cell division, this amount is distributed between the resulting daughter cells, with each cell obtaining half of the DNA present in the original cell.
As mitosis yields two daughter cells, each one will receive 100 units of DNA.
Answer:
The respiratory system is comprised of specialized organs and structures for gas exchange in both animals and plants. The structure and function of this system differ significantly based on the organism's size, habitat, and evolutionary background. In terrestrial animals, the respiratory surfaces are typically the linings of the lungs. In mammals and reptiles, gas exchange occurs within millions of tiny air sacs known as alveoli, while birds have atria for this process. These tiny air sacs boast an extensive blood supply, ensuring air comes into close proximity with the bloodstream. They connect to the outer environment through airways or hollow tubes, with the trachea being the largest that divides in the chest into two primary bronchi. These then branch further into successively narrower secondary and tertiary bronchi, eventually leading to numerous smaller tubes called bronchioles. In birds, these are referred to as parabronchi. The air needs to be drawn into the alveoli or atria from the outside through the act of breathing, which involves respiratory muscles.
Explanation:
In trees and other plants, the presence of a cell wall gives the organism a protective barrier, contributing to its stiffness and rigidity, whereas animals lack this structure, allowing for greater movement.
Answer:
99% water, sodium chloride, trace elements of waste, and vitamin C
Explanation:
Eccrine glands are the primary sweat glands present in our body. They are distributed throughout the skin, but are denser on the palms, soles, and scalp.
99% of the secretion from eccrine glands consists of water, with the remaining 1% comprising sodium, small amounts of waste, and a significant quantity of vitamin C being excreted through these glands.
Since the eccrine gland facilitates sweating, it plays a crucial role in regulating body temperature. Given that 99% of its secretion is water, dehydration and fluid loss become significant concerns during heavy sweating.
