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topjm [15]
4 years ago
6

"No biological system is completely closed, thus some movement of nutrients in and out always occurs." Is this statement true or

false?
Biology
1 answer:
Gemiola [76]4 years ago
3 0

Answer:

TRUE

Explanation:

No biological system is completely closed.

A nutrient cycle is the movement and exchange of both organic and inorganic matter back into the production of matter. This cycle is a recycling system which always occurs no matter what.

In a system that looks closed (closed loop), nutrients may be limited because they are not cycled through  the system fast enough and/or it is not possible to compensate for deficiencies by  migration.

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Explain how a sprinter gets energy during a 30-second race. Is the process aerobic or anaerobic? How does it
lord [1]

Answer:

sprint runners rely on lactic acid fermentation as there main source of energy,printing takes a lot of effort and a lot of big movements  and a lot energy on demand . cellular respiration makes ATP at a slower rate than lactic fermentation therefore it is anaerobic

Explanation:

the sprinter uses ATP already in muscles as well as ATP produced by lactic acid fermentation. A long-distance runner gets its ATP solely off of cellular respiration

hope this helps

3 0
3 years ago
Why is GMO modification different for plants and animals? Plants have a cell wall. Plants do not have DNA The mitochondria in pl
Ahat [919]

Answer:

Plants have a cell wall

Explanation:

GMO modification is different for plants and animals <u>because plant cells have cell walls, unlike animal cells. </u>

<em>GMO refers to genetically modified organisms - a technique that involves the introduction of foreign genes into the genome of organisms.</em>

GMO modification requires that the genome of a cell is accessed by a foreign gene and in order to do this, the membrane of the cell has to be disrupted to gain entrance by the gene. Animal cells do not have cell walls, and thus, can be accessed directly relevant mechanisms. Plant cells, however, have cell walls and as such, no direct access to the cell membrane can be achieved without having to remove the cell wall first.

Thus, the cell wall is a major factor that makes GMO modification to be different for plants and animals.

5 0
3 years ago
Which factor does not influence stream velocity?
GenaCL600 [577]

Answer: C. Stream elevation

Stream velocity is the speed of water in a stream. It can be measured in meters per second or feet per second. Stream velocity is highest in the mid stream and lowest along the bottom of the stream. Stream discharge depicts the flow of water from it's source of origin. Stream gradient indicates difference in pressure levels between different water layers. Channel size is the width of water surface acquired by the water body. Stream elevation is the rise in the superficial layer of water. Stream discharge, stream gradient and channel size all influence the stream velocity as they are related to the flow of water. Stream elevation does not influence flow of water hence, does not influence stream velocity.

7 0
4 years ago
Read 2 more answers
Water can leave the air as a result of which processes? A. infiltration or transpiration B. precipitation or evaporation C. evap
Zina [86]

Answer:

D

Explanation:

The water in the air is in its gas form. The act of evaporation is water in its liquid form turning into gas. Condensation and precipitation both are acts of water in its gas form turning back into its liquid form.

4 0
3 years ago
Read 2 more answers
What is the difference between metaphase in mitosis and metaphase I in meiosis? How are they the same?
Vikki [24]
The difference between is metaphase in mitosis has ‘pairs of chromosomes’, while metaphase in meiosis have ‘spindle fibers’. They are the same because metaphase 2 is found in meiosis 2. The metaphase 2 in mitosis, chromosomes are arranged on the metaphase plate and are attached to the completed spindle.

I hope this helps
7 0
3 years ago
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