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3 years ago

in the energy pyramid, an organism that eats the secondary consumer is called a ______ plz I need help on this

Biology

1 answer:

umka21 [38]3 years ago

5 0

Decomposers

Organisms that consume secondary consumers are called tertiary consumers, while organisms that consume tertiary consumers are called quaternary consumers and so on. Trophic level: The highest position an organism occupies on a food chain. Decomposers: Decomposers are Nature's 'garbage' recyclers!

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One way to determine the density of animals in an area is to use the mark-recapture technique. A number of individuals from a po

NNADVOKAT [17]

Answer:

N = 187.55

Explanation:

Here you just need to replace the terms and clear the equation.

You already know that,

First capture: 25 prairie dogs.
First marked animals: 25 (the whole first capture)

You let these animals leave and then you made another capture.

Second capture: 135 prairie dogs
Already Marked animals: 18 (these 18 dogs were caught in the first capture and marked before releasing them)

To know the size of the prairie dogs population you just need to use the following equation and clear N, which is the value that you are looking for.

Number of individual marked in first catch/Total population size, N = Number of individual marked in 2nd catch / Total number of 2nd catch

Number of individual marked in first catch = 25 dogs
Total population size, N = this is what we want to know
Number of individual marked in 2nd catch = 18 dogs
Total number of 2nd catch = 135 dogs

So now, we need to replace terms

25 / N = 18 / 135

25 / N = 0.1333

N = 25 / 0.1333

N = 187.55

4 0

3 years ago

Roberta makes a $9 an hour plus a 12.5% commission selling jewelry how much does she earn on a 8 hour shift which she sells $380

aivan3 [116]

Answer:

The amount Roberta makes an hour is $119.5

Explanation:

Let the number Roberta makes be x hours.

Amount earned in x hours shift - 9*x + 12.5% of the amount of jewelry sold.

Number of hours worked by Roberta if 9 hours and jewelry worth $380 is sold by her.

Substituting the values:

Amount earned in an 8 hour shift = 9*8 + 12.5% od 380

= 72 + 0.125 * 380 (12.5% = 0.125)

= 12 + 47.5

= 119.5

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3 years ago

What is the structure of the inferior vena cava

earnstyle [38]

Answer:

Structure. The IVC is formed by the joining of the left and right common iliac veins and brings collected blood into the right atrium of the heart. It also joins with the azygos vein (which runs on the right side of the vertebral column) and venous plexuses next to the spinal cord.

Source: common iliac vein; lumbar veins;

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