Question

Which of the following organisms would you expect to find in an ecosystem that is in the initial stages of secondary succession?
Roses
Oak trees
Crabgrass
Bears
Otters

Question 25 (Multiple Choice Worth 2 points)

Which location would likely have the highest level of biodiversity?
A secluded lake that can only be reached by trail on an unpopulated island
A tropical rainforest that has been clear-cut to create highways and farmland
A polluted river that is now closed to motorized boats and is being cleaned up
A mountain top that can sustain only a few certain species of animals and plants
A corn field in the Midwest that is planted only once every three to four years

Question 26 (Multiple Choice Worth 2 points)

Which scenario would most likely result in genetic drift?
A botanist grafts together shoots from two different kinds of pea plants.
The grass growing in a field is regularly grazed by a herd of cattle.
Loggers cut down all but a few spruce trees in a forest.
A gardener picks the prettiest roses from his garden to give to friends.
Annual droughts periodically thin the population of cacti growing in a desert.

Answer 1

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.

Answer 2

Answer:

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.

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.