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RideAnS [48]
3 years ago
14

The opening and closing of _____________in your heart create the lub-dub sound and prevent the backflow of blood.

Biology
1 answer:
iVinArrow [24]3 years ago
4 0

Answer:

Heart valves or the closure of the mitral and tricuspid atrioventricular (AV) valves at the beginning of ventricular systole and the closure of the aortic valve and pulmonary valve at the end of ventricular systole.

Explanation:

The heart tone “lub,” or S1, is caused by the closure of the mitral and tricuspid atrioventricular (AV) valves at the beginning of ventricular systole.

The heart tone “dub,” or S2 ( a combination of A2 and P2), is caused by the closure of the aortic valve and pulmonary valve at the end of ventricular systole.

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Mold is made up of many fungi cells. Mold would be considered what type of organism?.
sweet-ann [11.9K]

Mold is considered a multicellular organism, made up of many fungi cells. Thus the correct answer is option (C) Multicellular Organism.

Multicellular organisms are made up of many cells thus it is different from unicellular organisms.

Some organisms, such as slime molds and social amoebae of the genus Dictyostelium, have both uni- and multicellular structures. These include every type of animal, as well as most fungi, terrestrial plants, and algae.

Colonies of identical individuals that come together to form organisms are called colonies. However, it can be difficult to distinguish between "colonial protists" and "real multicellular organisms" because the terms are interchangeable (colonial protists are occasionally referred to as "pluricellular").

A fungus with many cells is called mold. It is made up of hyphal filaments, which can group together to form mycelia. A mycelium is a collection of mycelia, and these structures make up the thallus, or body, of the mold.

The complete question is:

Mold is made up of many fungi cells. Mold would be considered what type of organism?

A. unicellular

B. prokaryotic

C. multicellular

To learn more about mold please click on the given link: brainly.com/question/3851425

#SPJ4

6 0
1 year ago
which is one of the disadvantages of using fossil fuels as an energy resource? (a) burning fossil fuels produces radioactive was
lilavasa [31]
I believe the answer is     b  
3 0
3 years ago
May someone please help me with this question, Thank you
sweet-ann [11.9K]
I think it's Genetic engineering
4 0
3 years ago
What type of joint has two bony surfaces that are united by a ligament or membrane?
Naddik [55]
Syndesmosis is the type of joint that has two bony surfaces united by a ligament or membrane . This is a fibrous joint between two bones and is also referred to as 'high' ankle sprain.<span>Some of the </span>long bones<span> in the body such as the </span>radius<span> and </span>ulna<span> in the </span>forearm<span> are joined by this type of joint.</span>
Injuries to this<span> joint often occur in conjunction with acute bony injuries to the ankle joint.</span>
3 0
4 years ago
The tropic of cancer and the arctic circle are examples of locations determined by:
finlep [7]

Answer:

Astronomy.

Explanation:

Astronomy.

Astronomy is science of stars and cosmos. It is a natural science that analyses the objects and events of celestial bodies.  To demonstrate their genesis and evolution, this uses maths, physics, and chemistry. Planets, moons, stars, nebulae, galaxies, and comets are of interest.

The Tropic of Cancer is the latitude circle 23.5 degrees north,whereas the Arctic and Antarctic Circles at ±66.5 degrees latitude.

3 0
4 years ago
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