Which organelle can be compared to a security guard who decides whom may enter a building and whom may not

1 answer:

4 0

The correct answer here is "cell membrane". Generally it makes sure that nothing enters or leaves the cell, except by its highly guarded "gates", such as ion channels, that let some particles through - but they're very picky about whom to let in!

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How fast can you answer correct..? How fast can i give you brainliest. Explain Your answer:D/ HELP..............................

svet-max [94.6K]

the answer is sunshine

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How much dna is in a typicalhuman cell ?

ANTONII [103]

Hmm i do not know but you can get dna from the cell.

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For plants and other organisms to develop differences among their respective species the alleles of their genes must contain var

olasank [31]

A) Mutation is the original source of variations for plants and other organisms which develops differences among their respective species

Explanation:

Genetic variation leads to the natural differences between each individual and among individuals of a species. The main cause for this variation is due to alleles that cause variations in the composition of genes or the DNA sequences.

A mutation is a genetic variation which leads to the creation of a new allele in a species population. Each variation in the DNA sequence leads to an allele formation and each allele leads to a difference in character or trait between individuals since they are the alternate version of the original genes.

Although genetic variations could be brought about by crossing over, random fertilization, or independent assortment; mutation is the original source because it provides the basic raw material for all the evolutionary changes.

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3 years ago

Place the layers of the trachea in order from deep to superficial.

Assoli18 [71]

Answer:

a) mucosa, submucosa, hyaline cartilage, adventitia

Explanation:

The wall of the trachea can be divided into four layers from the deep region to the superfacial region :

These are; mucosa, submucosa, the musculocartilaginous layer (hyaline cartilage), and the adventitia.

The adventitia is a connective tissue layer that combines with the musculocutaneous layer and with the connective tissue that encircles the trachea. It is composed of loose areolar tissue. This areolar tissue permits a considerable amount of movement of the trachea along its length.

The musculocartilaginous layer consists of the cartilaginous plates, fibroelastic tissue, and the tracheal muscle. The cartilaginous plates number and are composed of hyaline cartilage surrounded by perichondrium.

The submucosa contains many elastic fibers and fat cells and many small seromucous tubular glands, which open into the lumen of the trachea.

The mucosa has numerous low longitudinal folds and is lined with pseudostratified columnar ciliated epithelium, which contains numerous goblet cells and rests on a basement membrane.

I hope that helps!

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The density of a population would influence which limiting factor? weather growth rate niche space

AfilCa [17]

The population densituly would affect the space

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