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Scrat
1 month ago
13

a student reads in a science magazine that a mutation in a body cell causes it to divide rapidly, forming large masses of cells.

these masses of cells cause other body cells to divide uncontrollably. the student claims that the mutation is beneficial to the organism. is the student's claim correct?
Biology
1 answer:
lana [2.4K]1 month ago
5 0

Answer:

The student's assertion is incorrect

Explanation:

Unregulated cell division results in tumor formation and cancer if cells lose contact inhibition and spread to other regions of the body.

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Blue whales have 44 chromosomes in every cell. determine how many chromosomes you would expect to find in the following:Sperm ce
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Sperm Cell: Anticipated chromosome count is 22.

The sperm cell, measuring around 5 micrometers in diameter, is significantly smaller than the ovum and has a flagellum that is 60 micrometers long for movement. To enhance mobility and reach the egg swiftly, it reduces cytoplasm and packs its DNA tightly. The head features an acrosome packed with enzymes to aid in penetrating the egg's membrane.

As a haploid cell, it carries half the genetic material of the organism, which is lost during meiosis in the spermatogenesis occurring in the testes' seminiferous tubules.


Egg Cell: Expected to have 22 chromosomes.

The egg is the female-produced gamete in animals.

Like all gametes, the egg is haploid, thus containing half the chromosomal count of the future embryo, resulting in 22 chromosomes rather than 44. This egg will eventually combine with a sperm to create an embryo with 44 chromosomes.


Daughter Cell from Mitosis: Predicted number of chromosomes is 44.

Mitosis produces daughter cells identical to the parent cell during asexual reproduction, maintaining chromosome number without splitting it in half.

Mitosis is a type of asexual cell division, which replicates a mother cell into two genetically identical daughter cells.


Daughter Cell from Meiosis II: Expected chromosome count is 22.

Meiosis is a specialized cell division that transforms a diploid cell containing 2n chromosomes (here, 2n=44) into four haploid daughter cells with n chromosomes (n=22). This reproductive process occurs in the gonads to form gametes.

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2 months ago
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Analyze: Cellular respiration involves two phases. The anaerobic phase does not involve oxygen, while the aerobic phase does. Wh
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The anaerobic phase occurs in the cytoplasmic fluid, while the aerobic phase takes place inside the mitochondria

Explanation:

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Which one of the following contaminants is a physical contaminant?
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The physical contaminant is hair.

FURTHER EXPLANATION

Contaminants are any substances present in food that shouldn't be there. These contaminants fall into several categories: biological, physical, and chemical.

Biological contamination involves harmful agents like bacteria, viruses, or yeast that can cause illness if consumed. These are considered biological hazards.

Physical contaminants refer to tangible items that might inadvertently enter food, such as hair, fingernails, metal fragments, glass pieces, insects, jewelry, etc., which can present physical dangers that may injure someone who eats the contaminated food. These physical contaminants can occur during any stage of food processing and preparation.

Chemical contaminants consist of substances that must not be mixed with food or are present in excessive amounts, such as pesticides, insecticides, and cleaning agents. These are considered chemical hazards because they can lead to sickness or poisoning if ingested.

Based on that explanation, we can classify the options as follows:

  • Hair - physical contaminant
  • Salmonella - biological contaminant
  • Insecticide - chemical contaminant
  • Botulism - a serious illness caused by consuming improperly prepared food contaminated with a dangerous toxin.

LEARN MORE

  • food safety
  • food hazards
  • pest control in food establishments

Keywords: contaminants, food hazards

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