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ziro4ka [17]
3 years ago
8

Name the blood vessels that carry blood from the upper and lower part of the body

Biology
1 answer:
Nina [5.8K]3 years ago
4 0
Pulmonary artery.

-Tasha
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NacL is dissolved in water so that the concentration is initially higher in one part of the water the other,______ will occur so
mixas84 [53]
NaCl is dissolved in water so that in a given region or volume the concentration is initially higher in one part than the other l, thus simple diffusion will occur so that there is a net difference or 0, with respect to the concentration of NaCl in a particular volume of water than another. Basically the NaCl will be distributed throughout volume of water.
6 0
2 years ago
A gene cannot react chemically and form a trait without the proper what
kogti [31]

Answer:

Enzyme

Explanation:

Enzymes are the bio-catalyst that serve to accelerate the metabolic reactions occurring in a living cell.  All the metabolic reactions of organisms are catalyzed by enzymes. Each metabolic reaction is catalyzed by specific enzyme. Absence of that particular enzyme leads to absence of the respective product. Since genes code for protein which regulate the specific trait, absence of enzyme does not allow the expression of that trait.

Example: Absence of enzymes for chlorophyll synthesis would lead to absence of chlorophyll from leaves of the green plants.

6 0
3 years ago
5(a+4)-6a+1=12 plz help its due today
irga5000 [103]

Answer:

a = 9

Explanation:

5(a + 4) - 6a + 1 = 12

5a + 20 - 6a + 1 = 12

5a - 6a + 20 + 1 = 12

-1a + 21 = 12

     -21      -21

--------------------------------

-1a = -9

/-1     /-1

---------------------------------

a = 9

3 0
2 years ago
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One of the most important scientific discoveries was penicillin. Research the discovery of penicillin, what produces this drug,
artcher [175]

Answer:

It is essentially a broth culture filtrate of the penicillium mould.

Explanation:

  • Alexander Fleming invented penicillin an antibiotic in 1928. These have been rated as the most important scientific discovery, being among the first antibiotics to be effective against bacterial infection.
  • Penicillin belongs to different families that are selective against a large variety of bacteria.
  • In fact, this antibiotic was discovered by fleming and accident in which he left a platter containing staphylococci open and was contaminated by green mould. There was an area of inhibited bacterial growth around the mould from which he inferred that the mould produced a material that inhibited bacterial growth. This was found to be a penicillium mould through further study.
  • I assume penicillin is the most significant discovery so far because it was the first antibiotic ever discovered against bacterial infection in the absence of any drug.

4 0
3 years ago
What are two ways in which exocytosis might help a cell maintain homeostasis?
Olegator [25]
Endocytosis enables extensive particles to enter the cell, and exocytosis ousts vast atoms from the cell. Along these lines, the cell can acquire things it needs and disposes of things it doesn't. Exocytosis is the turn around process, where a cell ousts substantial particles, generally squander from cell forms.
8 0
2 years ago
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