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3 years ago

Which statements describe the Sun? Check all that apply.

Biology

1 answer:

Sholpan [36]3 years ago

5 0

Answer:

It is the center of the solar system.

It is made up mostly of gases, not solids.

It is the most massive object in the solar system.

Explanation: The sun is only about 4 billion years old so the 3rd one is incorrect, and the last one is incorrect because the Sun is made up of mostly hydrogen

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What causes agal bloom

Alika [10]

Answer:

Sudden Influx of Nutrients

Explanation:

Algal blooms are caused by a sudden influx of nutrients, coupled with already warm temperatures. This can happen from fertilizer runoff from farms or chemical industry waste. They allow algae to quickly grow, but the water reaches carrying capacity.

3 0

3 years ago

Why is it impossible for male calico cats to exist

Kisachek [45]

Answer:

genetics

Explanation:

calico cats must also inherit a gene unrelated to the X and Y chromosomes that codes for white fur. Because male cats have one X chromosome with code for black or orange and one Y chromosome with no color genes, they cannot technically be calico. About one in every 3,000 calico cats is born a male, and, unfortunately, don't live as long as female calicos due to their genetic abnormalities. XXY Syndrome renders male calicos sterile and can be the root cause of many other health problems

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3 years ago

Osteoarthritis is a disease that results in a thinned or absent layer of cartilage surrounding bones, causing bones to rub again

Diano4ka-milaya [45]

The correct answer is connective tissue.

Osteoarthritis refers to the most general kind of arthritis, influencing various individuals all over the globe. It takes place when the protective cartilage on the terminals of the bones wears down with time.

However, osteoarthritis can destruct any joint in the body; the ailment most usually influences the joints in the knees, hands, spine, and hips. Cartilage is a flexible connective tissue, found in the articulating surfaces of the joints. Thus, the condition osteoarthritis affects the connective tissue.

8 0

3 years ago

Read 2 more answers

Question 8

Scorpion4ik [409]

B because it’s it’s exterded by weight because wind dosent have weight it dosent move air pressure does

6 0

2 years ago

In 1985 a biologist counted 750 pine trees in a 250 hectare forest. Using similar counting techniques, the biologist counted 1,2

Alisiya [41]

Answer:

Suppose that we have a given function f(x)

The average rate of change of the function between two values x₁ and x₂ is given by:

$r = \frac{f(x_2) - f(x_1)}{x_2 - x_1}$

a) We want to find the average (rate) of change on the size of population from 1985 to 1995.

We have that:

f(1985) = 750

f(1995) = 1500

Then we have:

$r = \frac{1500 - 750}{1995 - 1985} = 750/10 = 75$

This means that the population of trees increases, in average, at a rate of 75 trees per year.

b) What is the density of trees each year that they were counted?

This will be equal to the quotient between the number of trees and the area.

1985: number of trees = 750 pines

area = 250 ha

Then the density is:

D(1985) = (750 pines)/(250 ha) = 3 pines/ha

So 1985, there were 3 pines per hectare.

1990: number of trees = 1250 pines

area = 250 ha

Then the density is:

D(1990) = (1250 pines)/(250 ha) = 5 pines/ha

1995: number of trees = 1500 pines

area = 250 ha

The density is:

D(1995) = (1500 pines)/(250 ha) = 6 pines/ha

3) now we want to get the average change between 1985 and 1995 in the density, this will be:

$r = \frac{D(1995) - D(1885)}{1995 - 1985} = \frac{6 pines/ha - 3pines/ha}{10} = 0.3 pines/ha$

So, on average, each year the number of pines per hectare increases by 0.3

7 0

3 years ago