culture. The language and customs of a group of people make up their culture.
Answer:
The steroid hormones cortisol and corticosterone are released by the Adrenals in response to the hormone ACTH from the Hypothalamus.
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.
Both organisms are composed of cells<span>, the basic unit of life, with each </span>cell<span> surrounded by a </span>cell<span> membrane. The biggest difference </span>between prokaryotes and eukaryotes<span> is that </span>eukaryotes<span> have a nucleus. They also have other membrane structures called organelles.</span>
<span>On reading about several studies that show a decrease in heart risk, sponsored by a coffee company, I would like to know what the positives and negatives were for such studies. a sponsored study suggests to me that the results could be bias towards the sponsor, and raises issues of a conflict of interests. what did the studies investigate? Different interest areas or the same? The information gathered could be skewed by the coffee company to favor what they are trying to demonstrate. Were the coffees part of the investigation the same brand and strength, and how were they mixed? Also were the coffee organic, or non organic? Was the coffee ground at the factory, or ground 'at home ' then to what settings was the coffee ground at? Independent studies generally are more reputable as they are not influenced to lean towards a certain outcome.</span>