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Talja [164]
3 years ago
10

James was observing cells under a microscope. He observed some cells which had a layer outside the plasma membrane. What is this

layer called?
Biology
2 answers:
Aleonysh [2.5K]3 years ago
5 0
The cell wall as it is a very strong barrier.
irga5000 [103]3 years ago
4 0
It's a cell wall, common to some types of cells, like plant cells (one notable component of the cell wall is <span>cellulose, which is exactly where we obtain it from</span>).
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3 years ago
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Why does the sodium potassium pump require ATP?
SpyIntel [72]

Answer:

The sodium–potassium pump is found in many cell (plasma) membranes. Powered by ATP, the pump moves sodium and potassium ions in opposite directions, each against its concentration gradient. In a single cycle of the pump, three sodium ions are extruded from and two potassium ions are imported into the cell.

Explanation:

Hope I helped!

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3 years ago
In summer squash, white fruit color (W) is dominant over yellow fruit color (w) and disk shaped fruit (D) is dominant over spher
dangina [55]

Answer:

Genotypic ratio = 16 WwDd: 0

Phenotypic ratio = 16 white, disk shaped fruit : 0 yellow, sphere shaped fruit

Explanation:

This question involves two different genes coding for fruit color and fruit shape respectively. The allele for white fruit color (W) is dominant over yellow fruit color (w) and disk shaped fruit (D) is dominant over sphere-shaped fruit (d).

According to this question, If a squash plant pure-breeding for white, disk shaped fruit (WWDD) is crossed with a plant pure breeding for yellow, sphere shaped fruit (wwdd), the following gametes will be produced by each GAMETE:

WWDD - WD, WD, WD, WD

wwdd - wd, wd, wd, wd

Using these gametes in a punnet square, all of the offsprings will have genotype WwDd, which is phenotypically white and disk shaped fruit.

The genotypic ratio is 4 WwDd: 0

The phenotypic ratio is 16 white, disk shaped fruit : 0 yellow, sphere shaped fruit.

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2 years ago
Bacteria can reproduce quickly by means of binary fission. Because of this, after binary fission
Dahasolnce [82]

C) all the offspring will be genetically identical.

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During binary fission, all the offspring will be genetically identical and little to no variation occurs.

Binary is an asexual form of reproduction which does not involve the combination of gametes from the parents.

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  • In this process, the offspring replicates the genetic component of the parents making it identical.
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  • It is only in sexual reproduction that genetic materials are exchanged between the parents and offspring. This leads to genetic variation.

Learn more;

Asexual reproduction brainly.com/question/9424950

#learnwithBrainly

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c) systems that are responsible for a specific function.

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