Work done is the product of distance and force, it is measured in joules.
Power is the rate of work done given by dividing the work done by time
Power (watts)= workdone (J)/ time (s)
= 50,000J/7 sec
= 7142.857 watts
Therefore, the power of the car during the race was 7142.857 watts
The p53 gene is a recessive tumor suppressor gene which functions as a key regulator for the cell cycle. In the event when only one p53 allele is mutated then the function of the p53 gene will persist and apoptosis (programmed cell death) will proceed if there are significant gene mutations in the cell. If two p53 alleles are mutated then the cell will not receive the signal to apoptose even with significant mutations and cancer will develop.
Answer:
1. nutrient recycler
2. mutualist
4. parasite
Option C
Explanation:
Nutrient recycler: The bacterial decompose the dead plant and release the organic elements back to soil or air. The organic matter present in the dead plant parts is decomposed and the carbon is released into the air. Similarly, other nutrients stored in the dead plant are decomposed by the bacteria and are released into the environment so that they can enter the nutrient cycles.
Mutualist: The bacteria living on the surface of leaf obtains nutrition from it. The plant is benefited by this association since the bacteria prevents the invasion of other pathogens in the plant. An ecological interaction wherein both the species are benefited is called mutualism.
Parasite: Once the bacteria enter the leaf, it causes disease to the plant. Here, the plant is the host while the bacteria is a parasite. The plant is harmed while bacterial obtains nutrition from the plant.
The major function of the contractile vacuole of amoeba is osmoregulation. The solute concentration found in the cell of amoeba's cytoplasm is more than the solute concentration in the freshwater that surround the external part of the organism, thus, water enter the cell through osmosis. The contractile vacuole collect the excess water and expel it through an opening in the cell membrane. By doing this, the contractile vacuole maintains the water balance in amoeba. This how the contractile vacuole normally operate.
In a situation where amoeba is placed in seawater, then water from the cell cytoplasm will rush out of amoeba cell, because of the higher salt content of the surrounding medium. The contractile vacuole will respond to the situation by increasing its contraction and pumping water out the cell in an accelerated manner, this will lead to the shrinking of the cell.
Answer:
287.5%
Explanation:
Initial = 40
Recent = 155
Growth rate = ( recent - initial )÷ initial ×100/1
=( 155-40/40) × 100/1
= 115/40×100/1
= 2.875×100/1
= 287.5%
The rate of growth is 287.5%
