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kykrilka [37]
3 years ago
12

Brown eye color in fruit flies is caused by a variation in a gene. What are two possible sources of this genetic variation?

Biology
1 answer:
sattari [20]3 years ago
6 0

Answer:

random mating

<h3>matution:a change in the chromosomes or genes of a cell</h3>

Explanation:

crossing over(or recombination) between chromotids or homologous chromosomes during meiosis

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Which of the labeled structures in the diagram allows bacteria to infect organisms under harsh conditions, such as in the acidic
daser333 [38]
A) because the capsule allows <span>bacteria to infect organisms under harsh conditions, such as in the acidic stomach</span>
4 0
3 years ago
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Animal and Plant Cell Organelles Use the drop-down menus to determine where these organelles can be found. Ribosome Endoplasmic
rjkz [21]

Answer:

  • Animal Cell:

Ribosome, Endoplasmic reticulum, Golgi apparatus, small Vacuoles, Lysosomes, Mitochondria, Cell membrane, Cytoplasm.

  • Plant Cell:

Ribosome, Endoplasmic reticulum, Golgi apparatus, Cell wall, Big Vacuole, Lysosomes, Mitochondria, Cell membrane, Cytoplasm, Chloroplasts.

Explanation:

                       <u>   Animal Cells                              Vegetable Cells</u>

Cell wall                          NO                                             YES

Vacuoles       YES, Small and more than ones     YES, Only one and big

Chloroplast                      NO                                        YES

Plasmatic membrane       YES                                            YES

Mitochondria                       YES                                         YES

Lysosomes                       YES                                           YES

Endoplasmic reticulum      YES                                           YES

Golgi apparatus                   YES                                           YES

Cytoplasm                            YES                                           YES

Ribosome                             YES                                           YES

Both the animal and plant cells are eukaryotic. They carry their genetic material in the nucleus and mitochondria. Organelles are located in the cytosol, and both of them are surrounded by a protector cell membrane.

However, they have some differences:

<u>Cell wall</u>: A rigid structure that provides support and protection.

  • Animal cells do not have a cell wall. They are only surrounded by the cell membrane, which is flexible, so they can adopt different shapes.
  • Plant cells have a wall, so their shape is usually prismatic and regular. The cell wall is composed mainly of cellulose.

<u>Chloroplast:</u> these are organelles that accumulate chlorophyll.

  • Animal cells do not have chloroplasts because they do not photosynthesize.
  • Plant cells have chloroplasts, and they are in charge of the photosynthesis process that allows plants to release oxygen. These organelles use solar light as the source of energy.

<u>Vacuoles</u>:

  • Animal cells have many and small vacuoles whose function is to store water, ions, and waste intracellular substances.
  • Plant cells have a unique big-sized vacuole that might occupy almost 90% of the cell. Their principal function is to store water and keep the turgidity. When the vacuole gets empty, the plant loses rigidity.

Other differences are:

The animal cell has centrioles, while the vegetable cell does not.

Plasmodium, chromoplasts, and glyoxysomes are present in the vegetable cell but not in the animal cell.

3 0
3 years ago
Hen there is a cut in the skin and bacteria enter the body, the immune system responds. First, macrophages approach the area of
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Correct answer: B). The phagocytotic barrier, which is a part of innate immunity

The scenario represents the phagocytosis, which is a type of endocytosis by which the cell engulfs microbial pathogens. The main cells of the immune system that are involved in phagocytosis include macrophages, neutrophils, and dendric cells.

It is a mechanism which is used by the immune system to kill and processing of antigen that play an important role in innate immune response.

Hence, the correct answer would be option B.

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4 years ago
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An outbreak of anthrax has occurred in a southwest community. Isadora is the local vet, so whenever she gets a call about a sick
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An outbreak of anthrax has occurred in a southwest community. Isadora is the local vet, so whenever she gets a call about a sick animal, anthrax is in the back of her mind injured animal would Isadora NOT worry about contracting anthrax is Herbivores.

<h3>What animals get anthrax?</h3>

Anthrax occurs naturally around the world in wild and trained hoofed animals, especially cattle, sheep, goats, camels and antelopes.

It can also happen in humans when they are told to the bacterium, usually through handling creatures or animal hides.

Thus, Herbivores injured animal would Isadora NOT worry about contracting anthrax.

To learn more about Herbivores click here:

brainly.com/question/16786804

#SPJ2    

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2 years ago
The first step a biologist takes when deciding how to study life is to _____.
Luda [366]
The first step the biologist needs to make an observation in which to create a hypothesis. 

Hope this was helpful!
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4 0
4 years ago
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