The organs that are involved in the excretion of water from the body include:
1. Kidneys (Primary organ for water removal)
2. Skin
3. Lungs
The kidneys play a key role in maintaining the water balance of the body. The kidneys control the water levels in the body by conserve water when there is shortage, and they can expel excess water by diluting the urine.
The skin has water in it. This water gets lost to the atmosphere by the process of evaporation. This is independent of the process of sweating wherein the skin actively releases water in the form of sweat to cool the body.
Our breath has a lot of moisture in it. This moisture is present due to the evaporation process taking place within the lungs due to the heat of the body. Thus lungs also become a part of the water loss mechanism.
Answer:
c. Only one of the statements is true
Explanation:
Quaternary structure, the highest level of protein organization in which association of several protein chains are closely arranged. The protein subunits are attached together by van der Waals forces and hydrogen bonds between nonpolar side chains. it is present in all the proteins which have 80 or more amino acids are present.
Collagen, is most abundant protein in the animal kingdom. It is insoluble fibrous protein present in the extracellular matrix and in connective tissue.
A protein chain has directionality consist of a free amino group at one end, and a free carboxyl group on other end.
Hence, only (2) statement is true the correct option is c.
Answer:
C. The rates of birth and immigration were balanced by the rates of death and emigration
.
Explanation:
A stable population size means that, over the years, number of individuals doesn't change significantly. This condition is only possible when the birth rate and immigration rate is balanced with the death rate and emigration rate. In this scenario, population size would not change much.
On the other hand, if a birth rate and immigration rate will increase, the population size in any area would be increased. This typically happens in growing cities. By contrast, if death rate and emigration rate increases, the size of population will decrease. This happens mostly in rural areas.
MRNA is the RNA that assists in Messaging the DNAs instructions to the ribosomes (sites of protein synthesis). tRNA helps to transfer the necessary amino acids to the ribosomes. In short, mRNA tells the ribosomes what amino acids to use and in what order. tRNA “retrieves” those and bring later them to the ribosomes.
Answer:
B. Shortens
Explanation:
Myofibrils are components of the animal skeletal muscles that are made up of sacromeres. They perform the muscular contraction and relaxation via the sliding filament model.
To produce motion, A cross-bridge forms between actin and the myosin heads triggering shortening of the sacromere. This shortening of the sacromere results in the contraction of the muscle fibers, which the net effect can be seen to be a shortening of the fibers
