Answer: a) relies on the uptake of an external signal molecule from the cell
Explanation: Signal transduction is known as the transmitting of any signal of a molecule from exterior of cell to interior of cell.This technique is termed as critical is taken care of successful transmission of signal effectively and positive result and reception is done by the cell surface receptors.It is also known as cell signalling. Thus,option(a) is the correct option of all.
Answer:
Seminal vesicle
Explanation:
Seminal vesicle secretes an alkaline and viscous fluid that constitutes about 60% of the volume of semen. The fluid secreted by seminal vesicle contains fructose which is a monosaccharide sugar, prostaglandins, and clotting proteins. The alkaline nature of the seminal fluid neutralizes the acidic environment of the male urethra and the female reproductive tract. This is required as the acidic conditions inactivate and kill sperm.
The fructose sugar serves a fuel for ATP production by sperm. Prostaglandins are responsible for sperm motility and viability as they stimulate smooth muscle contractions within the female reproductive tract. Therefore, a malfunctioning seminal vesicle would result in low semen volume and reduced motility due to the scarcity of energy.
More rainfall leads to the growth of the grass in a tallgrass prairie to grow so tall.
Answer: Option B.
<u>Explanation:</u>
The tallgrass prairie consists of big and little blue stem, switchgrass, and Indian grass. These were the species which thrive in the area which receive rainfall in large amount. The rainfall in these areas are in the amount of 30-40 inch annual precipitation.
Because these areas receive rainfall in such high amount, the grasses grow very tall. The height of these grasses reach to approximately 6-8 feet in height.
