<u>1. Crabgrass, 2. A tropical rainforest that has been clear-cut to create highways and farmland, 3. A botanist grafts together shoots from two different kinds of pea plants.</u>
Explanation:
As the initial stage of the ecosystem is the growth of trees and the secondary stage of succession is shown by the growth of grasses like the crabgrass and the development of small grass-feeding organisms.
Most of the biodiversity is found in the tropical rain forests of the world and these harbor large scale animal and plant diversity in the world thus called the evergreen forests of the world.
A botanist in order to get genetic drift has to merge the shots of two different kinds of pes species to form a mutated one.
For the first question is that crabgrass because in the process of secondary succession a forest fire burns down a forest then grasses grow back, then annual flowers bloom and eventually trees begin to grow so crabgrass is the initial stages of secondary succession.
The answer is B. The specific heat means the heat amount the substance needs to absorb when the temperature increases 1℃. The high specific heat means that it needs a huge amount of heat when increase just 1℃. For A, the dissolved salts can help decrease the freezing point.
