Answer:
A= ionization of particles
Explanation:
Plasma:
" The ionized gaseous mixture consist of atoms, ions and electrons is called plasma"
The plasma was first time identified by William Crookes in 1879. More than 99% universe matter is consist of plasma.
It is the fourth state of matter, the other three are solid, gas and liquid. The most of matter in the universe is plasma. When heat is supplied to the atoms, they gain energy the electrons in atom thus escape from the atom by gaining the energy and create the positive charge. Thus ions are formed. When heat is constantly supplied, the ionization process continue to take place and produce large number of positive charges, free electrons but some atoms not get ionized and remain neutral. Thus a cloud of free electrons , positive charge and neutral atoms is formed which is called plasma.
Answer:
Option A
Explanation:
In this case the two species of squirrels have evolved when their combined population got divided into parts and was separated as a cause of natural calamity i.e Colorado River's erosion of the Grand Canyon, thereby forced to live in two different geographies and hence evolve differently from each other. The two geographies mentioned above remain disconnected by any natural barrier thereby restricting successful mating of the two population groups of squirrels.
hence, option A is correct
A first quarter to a full moon
A system of glands that secret hormones into the blood stream
Answer:
Primary
Explanation:
Ecological succession is the gradual change in the structure of a community or ecosystem. There are two types namely: primary succession and secondary succession. In primary succession, the change starts with no presence of life i.e. on a barren piece of land or rock. The pioneer species are organisms that have the ability to survive on bare rocks e.g lichens.
In the image attached, the succession starts with a BARE ROCK, and the first pioneer species are lichens before gradually moving into a climax community. Hence, this is an example of primary succession. Note that, in secondary succession, there is presence of SOIL.