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marta [7]
3 years ago
10

Cyanobacteria which first appeared on earth over 3 billion years ago are

Biology
1 answer:
natulia [17]3 years ago
5 0
Cyanobacteria also known as one of the first organism on earth are responsible for producing nearly 80% of the oxygen on earth.
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Explain WHY when you put this pan on the stove, the metal pan is too hot to touch, but
harina [27]

Answer:

Then metal pan is a good conductor of heat, so it get hot quickly Making it too hot to touch,while the wooden handle is not a good conductor of heat, it doesn't get hot quickly when compared to them metal pan

Explanation:

Then metal pan is a good conductor of heat, so it get hot quickly Making it too hot to touch,while the wooden handle is not a good conductor of heat, it doesn't get hot quickly when compared to them metal pan

5 0
3 years ago
Which membranes line the passageways that open to the exterior of the body, including those of the respiratory, digestive, repro
jenyasd209 [6]

Mucous membranes line the passageways that open to the exterior of the body, including those of the respiratory, digestive, reproductive, and urinary systems in the body.

A mucous membrane or mucosa is a membrane that lines various cavities in the body of an organism and covers the surface of internal organs. It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue.

It is mostly of endodermal origin and is continuous with the skin at body openings such as the eyes, eyelids, ears, inside the nose, inside the mouth, lips, the genital areas, the urethral opening and the anus. Some mucous membranes secrete mucus, a thick protective fluid. The function of the membrane is to stop pathogens and dirt from entering the body and to prevent bodily tissues from becoming dehydrated.

One of its functions is to keep the tissue moist (for example in the respiratory tract, including the mouth and nose).  It also plays a role in absorbing and transforming nutrients.  

Mucous membranes also protect the body from itself. For instance, mucosa in the stomach protects it from stomach acid and mucosa lining the bladder protects the underlying tissue from urine. In the uterus, the mucous membrane is called the endometrium, and it swells each month and is then eliminated during menstruation.

Learn more about Mucous membranes here : brainly.com/question/26244782

#SPJ4

8 0
1 year ago
SOMEONE HELP PLEASSE!
charle [14.2K]

Answer:

<h2>Holaaaa !!</h2>

Explanation:

  1. at equilibrium , half of the 'O' molecules will diffuse in Next chamber while half of the 'Dark O' molecules will diffuse in First chamber.
  • ∆ can not move in either medium across Membrane.

  • 2 ∆ molecules can not move across the membrane due to its size.

Best Of Luck Sweetness !! Do well Baby !! ❤️

6 0
3 years ago
What is conjugation? a) splitting in two b) splitting genetic material c) uniting and exchanging genetic material
DedPeter [7]

Answer:

The answer is option B.

Splitting genetic material.

HOPE THIS HELPS YOU....

BRAINLIEST PLEASE....

5 0
3 years ago
Hormones are chemical substances that regulate many of the body's functions. true or false
liraira [26]
True. <span>Hormones are chemical substances that regulate many of the body's functions. </span>Hormones are chemical substances<span>, formed in a tissue or organ, that stimulate or inhibit the growth or </span>function of other tissues or organs.  They  <span>work in conjunction with the endocrine, nervous, and immune systems to </span>regulate many body functions.
8 0
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