Answer:
A) once, during interphase I
Explanation:
Although meiosis has two phases, the chromosome replicate only once during interphase I. The DNA material replicates and cell builds up enough energy stores to drive the process through. Other events that occur during interphase are formation of new organelles including centrioles.
Answer:
B. Temperature
Explanation:
The heart rate depends on the temperature so the heart rate is dependant and the one that changes is independant
Answer:
The urinary system consists of the ureters, kidneys, bladder, and urethra, also known as the renal system or urinary tract. It performs several functions including:
1. Regulate blood volume and pressure: change the amount of water lost in urine, EPO (more bone marrow activates RBC) and Renin
2. Regulate concentrations of plasma ions: monitors potassium, sodium, and chloride ions lost through urine and calcium ion levels by calcitriol synthesis (osteoclast activity and prevents urinary loss)
3. Helps to regulate blood pH: monitor hydrogen ion loss and bicarbonate ions in urine
4. Conserve essential nutrients: preventing nutrient excretion when excreting agricultural wastes
5. Help to detoxify toxins in the liver
The reason the mouse died and the fire wouldn’t light is because there was no oxygen. But once they put the plant in the fire lit because plants create oxygen
Answer:A. the same number of chromosomes as was contained in the zygote.
Explanation:a zygote is formed when the sperm fertilize the egg .
After fertilization,the zygote undergoes cleavage.cleavage is the mitotic Division of the cells of a zygote to produce daughter cells.
These daughter cells are called blastomere,which contains the same number of chromosomes as the parent cells.the cells formed do not grow in size but continues to divide, forming a mass of cells.
This mass may be solid at first but as cleavage continues,the cells move away from the center,leaving a fluid filled cavity in the middle (blastocoel).
The mass of cells are called blastula.