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ddd [48]
3 years ago
14

What is the function of the respiratory zone?

Biology
1 answer:
Colt1911 [192]3 years ago
3 0
The respiratory zone is the site of 02 and CO2 exchange with the blood;
site of gas exchange.
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What type of gametes does a spider plant have?
MAVERICK [17]
Gametes and female gametes joining, during fertilization, to produce a zygote and then an embryo. Most plants produce both male and female gametes, while some produce one or the other. Pollen contains the male gametes and is found on the stamen. Ovules contain the female gametes and are found in the pistil.
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Question 3
love history [14]

Answer:

<u>3. Hot spots , 4. S shaped mid oceanic ridge,  pacific ocean</u>.

Explanation:

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  • The s-shaped Atlantic ocean has mid atlantic ridge and as this ocean spreads the lava is up welding across the ocean floor and hence the opening of the atlantic plate is seen.
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4 years ago
Which of the following statements is true? A thin layer of chyme protects the lining of the digestive tract from being broken do
zheka24 [161]

The correct answer is: Heartburn often results when the gastroesophageal sphincter fails to close properly.

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When the gastroesophageal sphincter fails to close properly acid reflux occurs and causes the heartburn.

6 0
3 years ago
Help?
german
<span>b.)The mRNA code determines which tRNA molecules are used. 

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6 0
3 years ago
Read 2 more answers
(4pts) Drugs, medicines, and poisons often work by acting on endogenous proteins. They do this by looking similar to a signal mo
nalin [4]

Answer:

Drug, medicine, or poison: Muscarine; Looks similar to this endogenous molecule: Acetylcholine; Binds to this endogenous protein/receptor: muscarinic receptors

Drug, medicine, or poison: Tamoxifen; Looks similar to this endogenous molecule: estrogen; Binds to this endogenous protein/receptor: estrogen receptor

Drug, medicine, or poison: Prozac; Looks similar to this endogenous molecule: Serotonin; Binds to this endogenous protein/receptor: serotonin transporter protein

Drug, medicine, or poison: Ketamine; Looks similar to this endogenous molecule: NMDA; Binds to this endogenous protein/receptor: NMDA receptor

Explanation:

Muscarine is a poisonous natural product found in certain mushrooms. It is similar to acetylcholine and competes with acetylcholine at its receptor binding sites.Signs of muscarine poisoning include salivation, lacrimation, vomiting, diarrhea, abdominal pain, bradycardia, etc.

Tamoxifen is a selective estrogen receptor modulator. It is similar to estrogen and acts by inhibiting the effects of estrogen in the breast tissue. It is used to prevent and treat breast cancer in men and women.

Prozac is an antidepressant which belongs to th class known as selective serotonin reuptake inhibitors. It looks similar to serotonin and inhibits its action by competing with serotonin for its binding site. It is used for the treatment of depression disorders.

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7 0
3 years ago
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