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lina2011 [118]
3 years ago
10

Are Chromosomes structures are always present in a cell.

Biology
1 answer:
photoshop1234 [79]3 years ago
3 0

Answer:

No.

Explanation:

Chromosomes are visible only in reproduction otherwise they are in thread like structure called chromatin. Almost all nucleated cells contain chromatin or chromosomes while non-nucleated cells don't have chromosomes because chromosomes are always present in nucleus. Non-Nucleated cells include Red Blood Cells and thrombocytes.

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Calculate the ratio of surface area to volume of an imaginary cubic cell measuring 4mm long on each side?
Alex_Xolod [135]

Answer:

The answer is 3:2

Explanation:

A cubic cell has 6 sides

= 6 side²

= 6 × 4²

= 6 × 16

= 96 mm²

Volume of a cubic cell

= side³

= 4³

= 64 mm³

The ratio of the surface area to volume of imaginary cubic cell is therefore:

= 96/64

= 3/2

= 3:2

6 0
3 years ago
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Ket [755]

Answer:

No

Explanation:

Atmospheric refraction raises the sun about 1/2 degrees upward in our sky at both sunrise and sunset. This advances the time of actual sunrise, while delaying the time of actual sunset. This gives several minutes of extra daylight, not just at an equinox.

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Nadya [2.5K]
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Serjik [45]
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4 0
3 years ago
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Due to a demand for land in an urban area, a forest has been burned. How
Bogdan [553]

Much more carbon will be present in the landscape, seeing as plants which absorb it have been removed in quite large quantities. A major avenue of carbon absorption has thus been removed. In addition, immense amounts of carbon will have been released into the air from the burning itself. This carbon, combined with the otherwise existing carbon that is now stuck in the atmosphere (with no trees to absorb it), will contribute to pollution.

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