Answer:
.40+900=900.40+300=1200.40
Explanation:
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The cell membrane is selectively permeable, allowing only certain substances to pass through. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. The three main kinds of passive transport are diffusion, osmosis, and facilitated diffusion.
Follicle-stimulating hormones (FSH):
<span><span>· </span><span>In males-</span> stimulates the form<span>ation of secondary spermatocytes from </span>primary spermatocytes
</span> <span><span>· </span><span>In females-</span> stimulates the growth recruitment of immature ovarian follicles in the ovary</span>
<span> Luteinizing hormones (LH):</span>
<span><span>· </span>In males- stimulate the Leydig cells to produce testosterone</span>
<span><span>· </span>In females- stimulates theca cells for estradiol production</span>
Those are only some of the functions of those hormones. <span>Adrenocorticotropic hormones are hormones produced by pituitary glands which also indirectly have an influence on the reproductive system (male and female).</span>
You need to read the introduction like this
The appearance of fossils would the the answer.
Although there has been some scientific debate about what fossil strata should mark the beginning of this period, the "International Geological Congress" determined that the Cambrian period was approximately 543 million years ago of which the first appearance in the fossil record of worms that made horizontal burrows was discovered.
