Answer:
B. pre-zygotic, lock and key
Explanation:
When pollens from the different species fall on the stigma of a flower from some other species, the chemicals released from the stigma do not allow the pollens to germinate. The pollen tube is not formed to carry the male gametes to the egg cell for fertilization. Since this process does not allow the formation of zygote between the male and female gamete of two different species, it is a pre-zygotic isolating mechanism.
Here, the pollens and stigma of different plant species are not compatible with each other and the structural incompatibility of the reproductive structures prevents fertilization. This represents the lock and key mechanism of reproductive isolation.
Answer: C)They usually grow underground in tangles.
Fungi are eukaryotic, saprophytic organisms, that derive their nutrition by decaying the dead organic matter. They exhibit thread like structures called as hyphae, that helps in obtaining food. These hyphae grows underground to locate dead animal and plant matter, decay it and obtain food from it.
Answer:Potential energy is stored energy and the energy of position. Chemical energy is energy stored in the bonds of atoms and molecules. Batteries, biomass, petroleum, natural gas, and coal are examples of chemical energy.
Explanation: sorry if it’s wrong
Answer:
Lacks's cells survived, thrived, and multiplied outside her body, so much ... In the Lab ... But their use has raised challenging issues about medical samples taken ... Years later, scientists used that knowledge to develop HPV vaccines, ... Morin hypothesized that this enzyme, found in cancer cells, was also ...
Explanation:
