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baherus [9]
3 years ago
13

What structures are involved in cell movement

Biology
1 answer:
Ksenya-84 [330]3 years ago
5 0
Cytoskeleton  is responsible for cell movements. 
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what is the resistance of a car light bulb that conducts 0.025 A current when connected to a 12 V car accumulator? Is the curren
tangare [24]

Answer:

R = 480 Ohm

Yes, the current is steady since the power supply is a constant 12V (comming from the battery).

Explanation:

U=I*R

R = U / I

U = 12 V

I = 0.025 A

R = 12 / 0.025

R = 480 Ohm

6 0
3 years ago
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Blood is considered a colloid because it contains ____________ in the plasma. Most of these are produced by the ____________ . C
tekilochka [14]

Answer:

Proteins, Liver, Osmotic, Fluid, Into The Blood, Decrease.

Explanation:

Blood is considered a colloid because it contains proteins in the plasma.

Most of these are produced by the liver.

Collectively, these substances exert osmotic pressure and prevent the loss of fluid from the blood as it moves through the capillaries.

The pressure exerted by the plasma proteins is called colloid osmotic pressure.

This force is responsible for moving fluids into the blood and preventing excess fluid loss between blood capillaries and the interstitial fluid.

If plasma protein levels decrease, colloid osmotic pressure will decrease.

I hope this answer helps.

3 0
3 years ago
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Evolution is one of the unifying themes of biology. Evolution involves change in the frequencies of alleles in a population. For
lapo4ka [179]

A Mutation occurring in the population will change the allelic ratio.

<h3>What is evolution?</h3>

Evolution refers to the changes that occurs in organisms over a long period of time such that those changes results in new species better adapted to their environment and having higher specialization.

One of the factors of evolution is mutation.

According to the Hardy-Weinberg principle, the allele and genotype frequencies of a population of organism in equilibrium will remain constant in the absence of evolutionary influences.

Therefore, if a mutation occurs in the population, the allelic ratio will change.

Learn more about Hardy-Weinberg principle at: brainly.com/question/1365714

3 0
2 years ago
Evidence for sea floor spreading
Tju [1.3M]
The rocks near the mid-ocean ridge were younger then rock near trenches. Matching bands of magnetic rocks were found on either side of the mid-ocean ridge; bands like tree ring - record changes in earths magnetic field over time. Earthquake data showed oceanic crust is sinking on to the mantle at trenches.
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3 years ago
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Which statement best explains the decrease in energy availability in a food chain?
Stolb23 [73]

Answer: The correct answer is D) Some energy in each trophic level is used for life processes.  

Food chain represents the flow of energy through various living organisms (which lie at different trophic levels) in an ecosystem. The energy flows from one trophic level to the next and it is decreased with subsequent trophic levels.

As per the law of 10% energy transfer, only 10 % of the energy is transferred from one level to the next as the rest of the energy at every trophic level is utilized in various metabolic processes like respiration, digestion, excretion and also liberated as heat in the surrounding.

Due to this, the energy available at any trophic level is less than the previous trophic level.

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3 years ago
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