Which of the following examples best describes a disturbance that is likely to result in significant, long-lasting changes to an ecosystem? Choose 1
Choose 1

(Choice A)
A
A frost in late spring kills some of the earliest budding plants and flowers in a field.

(Choice B)
B
Tens of thousands of geese rest for a week at a large lake during their annual migration.

(Choice C)
C
The failure of a 60-year-old beaver dam floods a downstream meadow.

Choose one animal (cheetas) and research on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna.

Will mark you as ! keiko’s teacher was discussing the theory of endosymbiosis. she asked keiko to mark the organelles in the diagram that most closely resembled prokaryotes. which organelles should keiko mark? * the first image is the question and the second image is some information to you answer the !