Bohr's model treats electron energy levels as clearly defined orbital paths around the nucleus like planets orbit the Sun. The cloud model treats the energy levels as probability clouds, regions in which electrons are likely to be found.
Answer:
c
Explanation:
because matter is any substance that has mass and occupies space
Spermatogenesis results in four mature sperm cells, while oogenesis results in one mature egg cell. ;)
There are many structures responsible as...
a) chloroplast b) mitochondria etc
but the main part is chloroplast !!!
The primary function of pilli are to attach a bacterial cell to specific surfaces or two other cells some bacteria are able to produce conjunction pilli that allow for the transfer of DNA from one bacterial cell to another