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2 years ago

Gas exchange

1 answer:

5 0

Question: Below is a list of functions performed by organisms. Examine the list, then answer the question that follows.

gas exchange

intake of nutrients

disposal of wastes

stimulus response

reproduction

How do these functions compare between single-celled and multi-celled organisms?

A. Single-celled organisms can perform all of these functions, while multi-celled organisms can perform only some of these functions.

B. Single-celled organisms must perform all of these functions with one cell, while multi-celled organisms can have specialized cells for different functions.

C. Single-celled organisms can perform only some of these functions, while multi-celled organisms can perform all of these functions.

D. Neither single-celled organisms nor multi-celled organisms can perform all of these necessary functions.

Answer:

Option B, Single-celled organisms must perform all of these functions with one cell, while multi-celled organisms can have specialized cells for different functions.

Explanation:

All these functions are performed by both single celled and multi-cellular organism. A single cell has several microscopic organelles that performs specific functions while a multi - celled organism has different body organs/tissues to perform specialized function separately.

A cell exchange gas through the cellular membrane, intake nutrients through engulfing, dispose waste by lysosomes, stimulus response by sensory hairy structure and reproduction through cell division

Hence, option B is correct.

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Explanation:

because that is the correct one

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1 year ago

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(d) The researchers claim that the similar regulation of carbohydrate metabolism by hepatocytes when the cells are treated with

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2 years ago

When Dr. Jeff jumps on a skateboard and uses the fire extinguisher to move, which of these does he change to move BACK to where

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Answer:

<em>The correct option is C) direction of force</em>

Explanation:

In the terms of physics, force can be described as a push or pull on an object which allows the object to either move forward or backwards or in other directions.

When Dr. Jeff uses the fire extinguisher of the skateboard to move forward, he will require the same force to move backward but in the opposite direction. Hence, for moving backwards, the only thing required by Dr. Jeff to move backwards will be the direction of the force.

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1 year ago

Four students were asked to classify the activities of the people in the picture below as examples of either potential or kineti

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Hi there!

$\large\boxed{\text{The first choice.}}$

Kinetic Energy (1/2 · mass · velocity²) occurs when an object is in motion, or a force is occurring on the object. An example would be a car in motion.

Potential energy (mass · height · gravity ) is obtained when an object has the ability to do work. An example would be an object on a shelf. It has the potential to fall, and this would cause the potential energy to become converted into kinetic energy.

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Looking at the examples in the table, we can sort them as such:

Girl swimming laps- Kinetic energy because the girl is in motion.

Boy on diving board - Potential energy because the boy is not in motion, but has the potential to be in motion.

Girl hitting volleyball - Kinetic energy because the volleyball is in motion.

Boy holding volleyball- Potential energy because the volleyball is stationary and has the potential to be in motion.

Therefore, the correct table is table 1.

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1 year ago

You work for the WWF. Write a letter to the mayor of a small farm town to explain why this town is experiencing erosion, and why

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The letter should contain concerns about the causes and ill effects of erosion.

<h3><u>Explanation</u>:</h3>

Sir,

I am very sad to inform you that the town of Hariharanpur is suffering from continuous erosion for the last 3 years. Even after having proper knowledge about this fact, you being the mayor, are not taking any charge of this situation.

The town is situated just by the side of River Ganges which makes it's soil full of moisture. Along with the repeated deforestation and tree cutting for urbanisation, the smallest of the rain falls are also eroding a lot of soils. This can lead to severe landslides in river Ganges with severe loss of properties as well as loss of lives too.

So i request you to start embanking the river as well as to start planting new trees to save the town from getting lost under Ganges.

Thanking you,

XYZ.

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1 year ago

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