It can be caused by the humid air or surrounding.
Humid air makes the stones absorb water and therfore makes it soft.
Answer:
C) production of sperm and eggs
Explanation:
Sperms and eggs are the male and female gametes respectively. Formation of sperms and egg cells require meiotic cell division. Meiosis in sperm mother cells and egg mother cells reduces the chromosome number of half in the sperms and eggs. Meiosis also adds new gene combinations in these gametes by the process of crossing over.
Mitosis cannot reduce the chromosome number to half in the sperms and eggs. Absence of crossing over in mitosis leads to the formation of genetically identical progeny cells from mitosis.
Hence, mitosis can not form sperms and egg cells. If it does, the sperms and egg cells would not have genetic variations and there would be doubling of chromosome number with each round of sexual reproduction.
Answer:
Drug Powers :)
Explanation:
The drug will have certain anti cancer reproduction effects so that the cancer cells will not multiply as fast and lose their function to reproduce or damage any more of the organ or body part.
The right option is inducible
defense
Inducible defense is a defense mechanism
activated by plants against herbivore attacks.This mechanism is activated through
a prior encounter with a consumer that confer some level of resistance to
subsequent attacks. For the question given above, production of chemical defenses by an algae after it has been grazed upon by a
herbivore is an example of inducible
defense.
<u>Answer:</u>
An example situation of artificial selection is "More African elephants today naturally lack tusks compared to the elephant populations 100 years ago, because big game hunters sought elephants for ivory".
<u>Explanation:</u>
- The process of breeding animals to acquire the desired characteristics by the external means other than natural selection and behavior of animal itself is called as artificial selection.
- The first artificial selection was carried out by Darwin when he mated penguins that would have a higher chance of breeding.
- The practice of artificial selection was existing in human civilization a long time ago.
- This process was used to use wild animals and domestic animals in battles and other household works.