Answer: Smallpox
Explanation: Small pox is an ancient disease which is caused by the Virus named as Variola virus. Early symptoms are fatigue and high fever.
The virus then after produces rash on faces arms and legs. The spots gets filled with fluid and pus and in later stages it turned into crust.
This crust eventually dried and falls off. It was fatal in almost 30% of the cases.
It eradicated by a collaborative global vaccination program which was led by WHO.
If mitosis occurs correctly, the division of one cell by mitosis produces two cells.
Answer: d. Predators avoid prey that are in their prime in order to maintain a high reproductive rate in the prey population, and hence 'grow' prey for the future.
Explanation:
A predator can be define as an organism superior and strong enough to kill inferior and weaker organism. This organism kill other organism to obtain it as food. A prey is an organism which is weak and cannot defend itself from the attack of the superior organism.
d. is the correct option. This is because the predators do not bother about the age and strength of the prey. They attack over them whether the prey is weak , young, prime, or old and try to obtain it as food.
Answer:
Wegener presented a number of evidence to prove his plate tectonic theory, such as :
- The matching of rocks on each side of the Atlantic Ocean like a puzzle.
- His knowledge hat organisms such as freshwater reptiles were found in almost all continents
- He also identified organisms that live in different continents, and could not possibly cross over to the other continents due to water bodies (oceans) separating the continents.
Wegener's plate tectonic theory caused doubts to other scientists, because of the way he presented his evidence. Other scientists considered his mechanisms unrealistic
Explanation:
Answer:
Between silver and aluminum wires of same thickness and length, silver will offer lesser resistance.
Explanation:
Aluminum will offer higher resistance than silver (both having same thickness and length).
Silver has lesser resistivity than aluminum.
Resistivity is directly proportional to resistance.
Thus, between to wires of distinct materials, one with higher resistivity will offer greater resistance.
