The desert biome covers about one-fifth of Earth's surface. Deserts seldom get more than 50 centimeters (20 inches) of rainfall a year, and the organisms that live in deserts are adapted to this extremely dry climate. Select ALL of the interactions involving a biotic AND abiotic factor in this ecosystem. A) Small birds feed on cactus fruits. B) Water holes dry up due increasing animal populations. 3) Hawks circle the desert floor looking for small rodents to feed on. D) Nocturnal animals find shelter in spaces between rocks during the heat of the day. E) Use of off road vehicles disrupts habitats, causing the relocation of some species.

B)

D)

E)

Explanation:

Ecosystem is consist of biotic and abiotic factors and they both interaction with each other to maintain the balance in the ecosystem. from the given option following are the example of interaction between biotic and abiotic factor in this ecosystem:

Water holes and animal populations because Water holes are abiotic factor and animal population is a biotic factor and due to their interaction, water holes are drying up.

Nocturnal animals find and rocks because Nocturnal animals (biotic factor) interacting with rocks (abiotic factors) for their shelter during the heat of the day .

Use of off road vehicles and relocation of species because vehicles are abiotic factor which is disrupting the biotic factor which is some animal species.

Other options involve interaction between biotic and biotic factors.

Hence, the correct options are "B, D, and E."

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

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