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kirill115 [55]
2 years ago
9

What is a red blood cell

Biology
2 answers:
AnnyKZ [126]2 years ago
6 0

Answer:

The Red blood cell, (or erythrocyte) is a cell typically without a nucleus.

Explanation:

The thing that makes them red would be pigment hemoglobin, and help transport oxygen and carbon dioxide to and from all of the tissues. Red blood cells are surprisingly made from at the end of your bones.

UkoKoshka [18]2 years ago
3 0

Answer:

Red blood cell is a blood cell which contains hemoglobin necessary for the transport of oxygen in blood from one part of body to another part.

Explanation:

These are the most abundant cells in the blood and are developed from liver and yolk sac in fetus while from the bone marrow in children and adults. Red blood cells (RBCs), also called erythrocytes, are cells that circulate in the blood and carry oxygen throughout the body. These cells are produced in the bone marrow and are released into the bloodstream as they mature. RBCs typically make up about 40% of the blood volume. The normal RBC range for men is 4.7 to 6.1 million cells per microliter (mcL). The normal RBC range for women who aren't pregnant is 4.2 to 5.4 million mcL. The normal RBC range for children is 4.0 to 5.5 million mc.

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With independent assortment, the ratio of phenotypes in the F2 generation of a cross between true-breeding strains (AA bb x aa B
Alecsey [184]

Answer:

B. Dominant for one trait and recessive for the other

Explanation:

using the Punnetts square for the question above, the 9 in the ration refers to a dominant for both traits such as AABB, AaBb.

while the 3: 3 refers to a dominant for a single trait and recessive for one such as AAbb, Aabb, aaBB, aaBb

and the 1 refers to recessive for both traits such as aabb.

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3 years ago
When is the lac operon most active?
Vera_Pavlovna [14]

Answer: The correct answer to the question is option WHEN GLUCOSE LEVELS ARE LOW AND LACTOSE IS PRESENT.

Explanation: To start with,Lac operon can be simply defined as a part of the DNA that is under the part of the DNA is manipulated and controlled by the same promoter,they can be found in some prokaryotic cells giving room for regulation over excess synthesis of protein.so simply put,these specific segment of the DNA binds with the segment of the polymerase of RNA so that transcription of the mRNA from the operon genes will be achieved.

Lac operon is also known as lactose operon, it is seen in some enteric bacteria like e.coli where they play a crucial role in coding of genes for those proteins that function in moving lactose into the cystocel and digesting it to form glucose that is used for energy generation. These lac operon are are most active when glucose levels are low and lactose is present,with the low level of glucose, the lac operon can be transcribed to a high level,this is to ascertain that the bacteria only gets to activate the lac operon and can only make use of it,that is using lactose when all the preferred energy source from glucose has been exhausted.

6 0
2 years ago
When water and mercury are placed in glass tubes, the water in the right tube)
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2 years ago
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eduard

Answer:

Runoff is one of the ways land water finds its way back to the ocean, so it can join the water cycle again.

Usually, all the water that falls to the land gets soaked in the soil. However, during long rainy periods, or in the spring, when snow and ice glaciers start melting, soil gets oversaturated with water, so this excess water start flowing on the earth's surface. Gravity directs this water from higher to lower areas, where it will flow into some valley river. This river will take the runoff water to another river, then to the sea or the ocean.

Now this water can evaporate and start the water cycle once more.

4 0
3 years ago
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A scientist wants to know wheter a particular cell is round or rectangular.How should the scientist observe the overall shape of
dezoksy [38]

Answer:

<em>The shape of a cell can easily be seen through a light microscope.</em>

Explanation:

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