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neonofarm [45]
3 years ago
10

If the population of hawks in this area increases, their prey populations might decrease. Later, with fewer prey, the hawk popul

ation might decrease. The prey populations might then increase. This is an example of
Biology
1 answer:
Vanyuwa [196]3 years ago
3 0

Answer:

This question lacks options, the options are:

1. an ecosystem completely out of balance

2. how ecosystems maintain stability over time

3. interaction between biotic and abiotic factors within an ecosystem

4. ecological succession

The answer is 2

Explanation:

An ecosystem comprises of biotic organisms, abiotic substances etc. that interact with one another. The biotic components of an ecosystem are known to feed on one another in order to obtain energy. However, stability of an ecosystem must be maintained between predators and prey or else there will be extinction of many species of organisms.

One way balance in an ecosystem is maintained over time is by the increase and decrease in population of predators and preys in an ecosystem. For example, If the population of hawks (predator) in an area increases, their prey populations might decrease because there will be less predation.

Also, at a later time, when there is a fewer population of prey, the hawk population might decrease because there is less food to eat. The prey populations might then increase.

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Characteristics common to plants and animals regarding growth and reproduction are ______.
Lelechka [254]

Answer:

respiration, waste production, food intake, cells, breathing

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Genetic drift: select one:
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D. is the non-random change in allele frequencies that occurs in a small population.
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While alive, an organism absorbs (radioactive) carbon 14 at such a rate that the proportion of carbon 14 in the organism remains
Inga [223]

Answer:

The person has been dead for approximately 15,300 years

Explanation:

<u>Available data</u>:

  • The half-life of carbon 14 is 5,600 years
  • The human skeleton level of carbon 14 is 15% that of a living human

To answer this question we can make use of the following equation

Ln (C14T₁/C14 T₀) = - λ T₁

Where,

  • C14 T₀ ⇒ Amount of carbon in a living body at time 0 = 100%
  • C14T₁ ⇒ Amount of carbon in the dead body at time 1 = 15%
  • λ ⇒ radioactive decay constant = (Ln2)/T₀,₅
  • T₀,₅ ⇒ The half-life of carbon 14 = 5600 years
  • T₀ = 0
  • T₁ = ???

Let us first calculate the radioactive decay constant.

λ = (Ln2)/T₀,₅

λ = 0.693/5600

λ = 0.000123

Now, let us calculate the first term in the equation

Ln (C14T₁/C14 T₀) = Ln (15%/100%) = Ln 0.15 = - 1.89

Finally, let us replace the terms, clear the equation, and calculate the value of T₁.

Ln (C14T₁/C14 T₀) = - λ T₁

- 1.89 = - 0.000123 x T₁

T₁ = - 1.89 / - 0.000123

T₁ = 15,365 years

The person has been dead for approximately 15,300 years

4 0
3 years ago
Primary lateral sclerosis is a disease that affects the body's ability to react to stimuli and causes a person to have difficult
bearhunter [10]

Answer;

B) Neurons, epithelial cells

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-Primary lateral sclerosis (PLS) is a rare neuromuscular disease with slowly progressive weakness in voluntary muscle movement. PLS belongs to a group of disorders known as motor neuron diseases. PLS affects the upper motor neurons (also called corticospinal neurons) in the arms, legs, and face.

-It occurs when nerve cells in the motor regions of the cerebral cortex (the thin layer of cells covering the brain which is responsible for most higher level mental functions) gradually degenerate, causing movements to be slow and effortful.  The disorder often affects the legs first, followed by the body, trunk, arms and hands, and, finally the bulbar muscles (muscles that control speech, swallowing, and chewing).

5 0
3 years ago
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9) A force of 20 N acts upon a 5 kg block. Calculate the acceleration of the object.
Mkey [24]

Answer:

4

Explanation:

According to newton's second law f=ma. so a =f/m

then a=20/5 gives 4

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3 years ago
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