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SashulF [63]
3 years ago
9

13

Biology
1 answer:
zepelin [54]3 years ago
5 0

Answer: (a) Membranes prevent protein molecules diffusing out of the blood.

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What is the frequency of a wave that has a wave speed of 120 m/s and a wavelength of 0.40 m
Talja [164]

Answer:

300Hz

Explanation:

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Identify the location where the sex cells of each reproductive system mature.
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The correct answer is <u>D</u> -ovary for the left (female reproductive system) and Q-epididymis for right (male reproductive system).

Ovaries are the primary female sex organs that produce the female gamete (ovum) and several steroid hormones (ovarian hormones). The ovaries are located one on each side of the lower abdomen. Each ovary is about 2 to 4 cm in length and is connected to the pelvic wall and uterus by ligaments. The formation of a mature female gamete is called oogenesis. Oogenesis takes place in ovary and is initiated during the embryonic development stage when a couple of million gamete mother cells (oogonia) are formed within each fetal ovary.

Testis are the primary sex organ in males.  Spermatogenesis is process by which sperm is produced in testis. Spermatogenesis starts at the age of puberty due significant increase in the secretion of gonadotropin releasing hormone (GnRH). This, if you recall, is a hypothalamic hormone. Sperms released from the seminiferous tubules, are transported by the accessory ducts. Secretions of epididymis, vas deferens, seminal vesicle and prostate are essential for  maturation and motility of sperms. The seminal plasma along with the sperm constitutes the semen.

6 0
3 years ago
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Describe the u.s. experience with reducing point-source water pollution
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8 0
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(e) Predict the effect of the removal of the final electron acceptor on the rate of carbon fixation by the chloroplast. Justify
Vinil7 [7]

Answer:

The ATPs produced during Chemeiosmosis, in the chloroplast is needed during Calvin cycle to fix carbon for production of CHO, protein and fats  during conversion of 3C-glyceride phosphate(GP) to 2C- triose phosphate.(TP) .

The ATPs is needed for this reduction to take place in the presence of NADPH(which is oxdized to NADP).

Therefore, if the final electron acceptor is removed, there will be no electron transport chains which generated the PMF, for pumping H+ across into the thylakoid membrane of the chloroplast, to generate the electrochemical gradients, needed for  the energy for ATPase synthase enzymes,to synthesize ATPs production.

Therefore, the removal of the electron acceptor (oxygen) leads to stoppage of electron transport chain, and hence loss of ATP s, and therefore, no Carbon fixation as CHO, or protein, or fats.

Explanation:

7 0
3 years ago
What are materials that come from living things called? please list at least 3
dmitriy555 [2]
Organic matter is things that comes from living things

examples include sugars, alkaloids and terpernoids
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