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4 years ago

Do blood cells have a rigid cell wall

Biology

2 answers:

sukhopar [10]4 years ago

7 0

Human (or blood) cells, dont have walls at all, only plant cells do and since plants dont have blood, then no lol

liq [111]4 years ago

5 0

No, a plant has cell walls, but humans don't. Cells in living organisms have cell membranes, which kind of acts like the wall. Hope this helps!

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OverLord2011 [107]

1.Net Energy Gain is a concept used in energy economics that refers to the difference between the energy expended to harvest an energy source and the amount of energy gained from that harvest.

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3 years ago

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Does human intervention affect small-scale ecosystems differently than large-scale ecosystems?

sdas [7]

Answer: No

According to BBC, Human activities such as harvesting plants and hunting animals can unbalance the flows and cycles within those [SMALL SCALE ECOSYSTEMS ]ecosystems. Tree-felling may lead to soil erosion and a loss of habitat. Lack of shade and moisture in the soil can result in desertification.

According to National Geographic, Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.

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3 years ago

Why do irish potatoes become sweeter when boiled

Nezavi [6.7K]

Explanation:

The vitamin C loss in Irish and sweet potatoes could be due to the effect of heating as well as leaching into the boiling water.

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3 years ago

In 1998, scientists discovered that the expansion of the universe has been accelerating.

KengaRu [80]

Answer:

Option A (dark energy) is the right answer.

Explanation:

A hypothetical supplier of power that creates a force that contradicts gravity, which is assumed to have been the catalyst of accelerated universe development.
Hypothetically, dark energy counteracts the kinetic energy including its beginning of the globe, meaning that perhaps the multiverse does not have intrinsic curvature, although observational measurements presently indicate.

Some other three choices have no relation to the particular situation. Thus option A would be the right solution.

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3 years ago

1. How did dark matter affect the development of structures in the early universe?

-Dominant- [34]

Answer:

1. It seeded the development of galaxies

2. The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

3. Supernovae that are moving away at an accelerating rate.

Explanation:

1. How did dark matter affect the development of structures in the early universe?

It seeded the development of galaxies.

It seeded the development of quasars.

It cooled pockets of gas to form nebulae.

it became part of black holes

2. How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.

The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

The percentage of ordinary matter has grown in scientists' estimates.

The percentage of dark energy has shrunk in scientists estimates

3. Which is evidence for the existence of dark energy?

Pulsars that seem to be moving closer at an accelerating rate.

Supernovae that are moving away at an accelerating rate.

Black holes that are expanding at a constant rate.

Galaxies that are rotating at a constant rate.

Please don't use these answer's to cheat they are to help only.

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3 years ago