Answer:
Cortisol
Explanation:
The most important human glucocorticoid is the cortisol. It is also called hydrocortisone or stress hormone. It is produced in the zona fasciculata layer of the adrenal cortex of the adrenal glands. It controls blood sugar level between meals. It helps in maintaining blood pressure by controlling salt and water balance. It also control a response to stress by making more glucose from proteins and fats.
Ans.
Sickle-cell disorder is a genetic disorder, which shows defected red blood cells, due to mutation in the genes for hemoglobin protein.
Malaria is common in sub-Saharan Africa region and there, natural selection favored gene for sickle cells, because it might be beneficial to people having sickle cell disease that makes them able to survive in such condition and transmit their genes to offspring.
On the other hand, in those Africans, who moved to United States, where malaria is uncommon or absent, natural selection favored normal, wild type genes, resulting in fewer people with defected sickle cell.
Hence, sub-Saharan African population shows higher percentage of mutated gene for sickle cell as compared to population of United States.
Thus, the evolutionary process behind this difference is 'natural selection.'
Answer:
Explanation:
In this lesson we will learn the three basic parts of all cells. Cells have something called a cell membrane, a nucleus, and cytoplasm.
Answer:
3,5,6,4,1,2
Explanation:
3.interphase is the first phase of the cell cycle and the longest where the cell grows and prepares for mitosis through dna replication
5.chromosomes form in the first phase of mitosis, prophase
6.chromosomes line up along the equator during the second phase of mitosis, metaphase
4 sister chromatids separate during anaphase
1 two new nuclei form during telphase
2 cytokinesis is the separation of cytoplasm , resulting in two daughter cells
Answer:
El cuadro no está presente pero las diferencias principales entre células eucariotas y procariotas son:
Eucariotas:
Tienen núcleo
Tienen organelas
Tienen Vacuolas
Tienen Citoesqueleto
Tienen Cloroplastos
El ADN está asociado a proteínas
El ADN es lineal
Presentan mitocondrias
Presentan un sistema de endomembranas
Procariotas:
No tienen núcleo
No tienen vacuolas
No tienen cloroplastos
No tienen organelas
El ADN no está asociado a proteínas
El ADN es circular
Presenta mesosomas
Explanation:
Las células procariotas son más primitivas que las eucariotas, por ende, sus estructuras son más simples. Las células procariotas están en organismos unicelulares tales como las bacterias, mientras que las células eucariotas están en organismos unicelulares y pluricelulares como en plantas, animales, u hongos. La diferencia más notoria entre ambos tipos de células es la ausencia de núcleo en las procariotas haciendo que el ADN está disperso en el citoplasma mientras que en las células eucariotas, el ADN está dentro del núcleo celular.
