BRANLIEST PLS HURRYy

Answers

Answer 1

Answer: Answer:

Illustration B

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What observation led researchers to propose that chloroplasts evolved from cyanobacteria?

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The theory that claims that, mitochondria and chloroplast's origin is bacterias, is called the endosymbiotic theory. It suggest that, plastids (one of them is chloroplast) and mitochondria were once, bacterias, and about 1.5 billions year ago they started to live with (inside) the pre-eukaryotic orgamisms. This is called endosymbiosis. The chloroplast originates from the cyanobacterias and the mitochondria from the proteobacterias. The some evidences that support this theory are these :-Mitochondria and chloroplast are formed with binary fission (the way bacterias reproduce)-When you remove a cell's mitochondria or it's chloroplast it can not produce them by itself.-Mitochondria and chloroplast have their own ribosomes (which produces protein) and they are smaller than the cell's own ribosomes, their ribosomes are similar to bacterias'.

In the modern quantum-based atomic theory, what is the name given to a particular space around the nucleus in which an electron moves?

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The name given to a particular space around the nucleus in which an electron moves is Orbital...in which an electron moves or revolves around the nucleus ..

Hope it helps !!!

Answer:

The answer would be C. orbit

The vascular tissue that transports water and dissolved nutrients from the roots up through the plant is calledA. phloem.
B. xylem.
C. transport tissue.
D. fibrous tissue.

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It is Xylem of the plants that help transport the water and other nutrients from the roots up through the plant. The phloem basically transport food synthesised by the plant but not the water.

Each enzyme produced by the body isA. specific—meaning it is only able to catalyze a reaction with a certain molecule.
B.incomplete—meaning it requires other parts before it is able to bind to a molecule.
C. immature—meaning it cannot catalyze a reaction until many years later.
D. open—meaning it is able to catalyze a reaction with any molecule.

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A an enzyme is very specific

Answer:

A. specific—meaning it is only able to catalyze a reaction with a certain molecule.

Explanation:

Study Island

Which type of molecule makes up the double layer of a cell membrane?

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The double layers of cell membranes is made up of PHOSPHOLIPIDS.

The cell membrane, also called plasma membrane is made up of double layers of phospholipids. Phospholipid is a type of lipid, which is made up of two parts, an hydrophillic head and a hydrophobic tail. The hydrophillic head is made up of phosphate and glyerol while the hydrophobic tail is made up of fatty acids. The double layer of phospholipids serves as a barrier that allows only certain substances to enter into the cells.

Final answer:

The double layer of a cell membrane is made up of phospholipids. These molecules form a phospholipid bilayer, where their hydrophilic (water-attracting) heads face outward and their hydrophobic (water-repelling) tails face inward, maintaining the cell's structural integrity and controlling substance passage.

Explanation:

The type of molecule that makes up the double layer of a cell membrane is called a phospholipid. Phospholipids are a type of lipid molecule that is a primary component of all cell membranes. They are structured with a glycerol backbone, two fatty acid chains which are hydrophobic (water-repelling), and a phosphate group which is hydrophilic (water-attracting). In the cell membrane, these phospholipids align themselves into two parallel layers, known as a phospholipid bilayer, with the hydrophobic tails facing inward and the hydrophilic heads facing outward. This molecular arrangement allows the cell to maintain its structural integrity while also controlling the passage of substances in and out of the cell.

Learn more about Phospholipids here:

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The ocean contains many plants and protists that can make their own food. What do these organisms get by living near the surface that they cannot get in deep water? A.sunlight
B.shelter
C.food
D.oxygen

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By living near the surface these organizms can get A.sunlight. It's a well known fact that organizms that live in the deep water have lack of sunlight, but this doesn't affect their life in bad way though. They accustumed to be in such environment and can get food, shelter and oxygen.

Answer: sunlight

Explanation: I know it's late but hope it helps someone