Answer:cell walls; plant-like
Explanation:
Diatoms are white, porous and soft I'm nature. When it's die, it's leave it's shells which is made of silica glass.
The silica glass is some how abrasive which is why it is use as toothpowder.
Diatoms are microscopic bit of silica glass which are use as fine abrasive in toothpaste to clean teeth.
Answer:
A fossil fuels
Explanation:
fossil fuels are Americas biggest energy producers we use things like coal, natural gas, and petroleum
Answer:
6. Prophase 1
7. Interphase
8. Metaphase 2
9. Prophase 2
10. Anaphase 1
11. Anaphase 2
12. Telophase 1
13. Metaphase 1
14. Telophase 2
Explanation:
Following is a summary of the events of meiosis:
Interphase:
Prepares the cell for division. Duplication of DNA, duplication of centrioles occurs and the cell grows in size. At this stage the cell is diploid (2n).
Prophase 1:
First stage of Meiosis 1.The centrioles move to the poles of the cell, the nuclear membrane disintegrates, homologous chromosomes pair up (in the form of tetrad), form a chiasmata and then exchange segments of chromosomes with each other. This process is called crossing over.
Metaphase 1:
Involves the arrangement of the crossed over, homologous chromosomes on the metaphase plate which is sort of like a web of spindle fibers that originates from the centrioles.
Anaphase 1:
The tetrads arranged on the metaphase plate are pulled apart by the spindle fibers. This is the result of tension that build up in the spindle fibers as they grow towards opposite poles.
Telophase 1:
The last stage of meiosis 1. Involves the arrival of the chromosomes at the poles, the nuclear membrane starts to form and the chromosomes start decondensing. Telophase 1 yields 2 daughter cells with half the number of chromosomes as that in the parent cell.
Meiosis 2:
Meiosis 2 is exactly similar to mitosis. The only difference is that the haploid cells entering meiosis 2 do not duplicate their DNA. Meiosis 2 just involves the separation of the sister chromatids of homologous chromosomes.
- As mentioned above, interphase does not occur before meiosis 2.
- Prophase 2 involves the disintegration of nuclear envelope, centrosomes start moving to the poles.
- Metaphase 2 arranges the chromosomes on metaphase plate.
- Anaphase 2 separates the sister chromatids from the chromosomes.
- Telophase 2 develops the nuclear envelope and separates the nuclei of the daughter cells into 2. Nuclear division id followed by cytokinesis (division of cytoplasm). Telophase 2 result sin 4 haploid daughter cells with one chromatid from each chromosome.
The muscles on the right side of Omar's body were smaller than those on the left side due to <u>Hemihypertrophy.</u>
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- A hereditary condition known as hemihypertrophy causes a person's body to expand excessively on one side compared to the other.
- Because of continuing bone or soft tissue growth, one side of the body grows more quickly than the other.
- Everyone who is affected can have a different appearance, and youngsters frequently have it.
- One area of the body, like the legs, may be unaffected by the overgrowth. However, it might also affect the mouth, face, and limbs, among other body parts.
- Although the gene that causes hemihypertrophy isn't always known, it can be passed on from parents to children.
- Hemihypertrophy is frequently connected to chromosome 11 mutations in Beckwith-Wiedemann syndrome.
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The relative infection will be resistant to Rifampcin therapy. The bacteria that was responsible for the patient's death is probably resistant to drug and that is why the patient died. If this bacteria is allowed to reproduce, it will pass its drug resistant gene to its offspring.