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3 years ago

5

A lack of explanation for continental drift prevented many scientists from accepting that a single super-continent called ____ o

nce existed.
A) Glomar
B) Glossopteris
C) Pangaea
D) Wegener

2 answers:

Anna71 [15]3 years ago

8 0

The answer is C. Pangaea

Law Incorporation [45]3 years ago

6 0

Pangaea is the answer

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charle [14.2K]

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3 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

A patient states that her pain is an 8 on a scale of 1 to 10. this is known as the ______________ in a history of present illnes

amid [387]

It's known as severity.
The fact that her pain is on the scale between 1-10 refers to the severity of her pain.

Hope that helped ^U^

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4 years ago

How would relaxing the smooth muscles in arteries affect blood pressure ?

zloy xaker [14]

When you relax the smooth muscles in arteries, it affects the blood pressure quite a lot. If you're a up and running person, you're most likely not always relaxed. Although - if you manage to relax, it would cause your blood pressure to lower from a high rate, to a much lower rate. That's the main outcome of this.

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3 years ago

Read 2 more answers

Cellular Respiration, please help this is due tomorrow and I don't get it at all.

saw5 [17]

Answer:

What does cellular respiration due?

<h2>Cellular respiration releases stored energy in glucose molecules and converts it into a form of energy that can be used by cells.</h2>

Explanation:

<h2>What are the 7 steps of cellular respiration in order?</h2>

<h2>Overview of the steps of cellular respiration. Glycolysis. Six-carbon glucose is converted into two pyruvates (three carbons each). ATP and NADH are made.</h2>

...

<h2>Glycolysis. ... </h2><h2>Pyruvate oxidation. ... </h2><h2>Citric acid cycle. ... </h2><h2>Oxidative phosphorylation</h2>

<h2>Answer</h2>

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3 years ago