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3 years ago

Which statement best describes a human influence on the biogeochemical cycles?

Biology

2 answers:

prisoha [69]3 years ago

6 0

The correct answer is A.

An increase in levels of nitrogen and phosphorus can cause eutrophication, which often leads to algal and phytoplankton blooms in the ecosystems and the formation of dead zones or toxins in the water. The excess nitrogen and phosphorus enter the water from agriculture water runoff and sewage release .

Pavlova-9 [17]3 years ago

3 0

The statement that best describes a human influence on the biogeochemical cycles is A) increased eutrophication caused by high levels of nitrogen and phosphorous.

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low levels of activity in the anterior cingulate cortex are associated with ____.

muminat

This is based on borderline personality disorder which is low levels of activity in anterior cingulate cortex is associated with hoarding behaviors, suicidal behavior that is 7.5% suicide over 20 years old, self-injury 2/3 ; 3/4 stabilize in 10 to 15 years, co-morbid PTSD or mood disorder, at risk for substance abuse and eating disorders, schizotypal personality disorder, might be related to dissociation identity disorder, genes account for 60% variance in developing BPD, lower serotonin function, increased activation of amygdala and disturbed connectivity b/w prefrontal cortex and the amygdala.

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3 years ago

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A binding protein binds to a ligand, L, with a Kd of 400 nM. How much ligand (in nM) is present when the fraction of ligand boun

mina [271]

Answer:

600nM

Explanation:

From Concentration of Ligand = Ykd/1 - Y

where Kd = 400nM.

fraction of ligand bound Y = 0.60

Plugging the values of Y and Kd;

Concentration = 0.6 x 400 / 1 - 0.6

Concentration = 600 x 10^-9

= 600nM

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4 years ago

What are some similarities and differences between how mammals and other kinds of animals reproduce?

Tema [17]

Answer:

Explanation:

Mammals reproduce through live birth, while other animals such as reptiles and birds lay eggs where the embryo develops inside the egg. Both mammals and reptiles produce sexually. Most mammals have fur or hair, however, other animals such as reptiles/birds have feathers/scales.

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3 years ago

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A 2550 gram box is pushed across the floor with a net force of 18 .0 N.

Aleks04 [339]

Answer:

The acceleration of the box across the floor is 7.0588 $m/s^2$

Explanation:

Given:

Mass of the box = 2550 gram

net force acting on the box = 18 .0 N.

To Find:

The acceleration of the box across the floor = ?

Solution:

Newton's 2nd Law of Motion states that the acceleration of an object as produced by a net force is "directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. "

Newton's Second Law formula is

F = m a

Where:

F = the magnitude of the net force, in N

m = the mass of the object, in Kilogram

a = the acceleration of the object, in $m/s^2$

Now substituting the values, we get

18.0 = a (2.55) [since 2550 gram = 2.55 kg]

$a = \frac{18.0}{2.55}$

a = 7.0588 $m/s^2$

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3 years ago

What is transcription

kumpel [21]

Answer:

a written or printed representation of something

Explanation:

6 0

4 years ago

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