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k0ka [10]
2 years ago
14

Persons with __________ blood have neither antigen a nor antigen b on their red blood cells but have antibody anti-a and antibod

y anti-b in their plasma.
Biology
1 answer:
Flura [38]2 years ago
8 0

Persons with O blood have neither antigen a nor antigen b on their red blood cells but have antibody anti-a and antibody anti-b in their plasma.

ABO blood grouping was discovered by Austrian scientist Landsteiner. It consist of four blood groups- A, B, AB, & O.

Red blood cells have certain extension of the proteins that are called antigen. Two types of antigens are there antigen a & b. The RBCs which have a particular antigen will not have the antibody against the same.

Blood Group A has antigen A and antibody B. Blood group B has antigen B and antibody A. Blood group AB has both antigen and no antibodies while blood group O has no antigen and antibody A & B.

To learn more about red blood cells here

brainly.com/question/17890844

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A region experiences frequent landslides from heavy rains. How can the local residents lower the frequency of landslides in the
german
In order for the local residents to lower the frequency of landslides in the region that experiences frequent landslides from heavy rains, they should do the following:
A. Start contour plowing on the slopes where landslides happen.
B. Plant vegetation on the slopes that experience landslides.
6 0
3 years ago
Determine whether the description applies to landfills, incinerators, or both.
Flura [38]

Emission of toxin and generation of ash is related only with incinerators. Draining of liquid and requirement of substantial amount of land is related with landfills only. Generation of energy and release of greenhouse gases is related with both landfills as well as incinerators.

<h3>What are incinerators?</h3>

An incinerator is a waste-burning furnace. Pollution control equipment, such as flue gas cleaning, is included in modern incinerators.

Incinerator plant designs include moving grate, fixed grate, rotary kiln, and fluidized bed.

The descriptions can be as follows:

  • Generation of energy - Both, landfills produce methane gas, which is used to generate electricity, and incinerators produce heat energy, which is also used to generate energy.
  • Emission of toxins through combustion - Incinerators emit dioxins, a hazardous chemical.
  • Draining of liquids into the ground - this is a common problem at all landfill sites.
  • Emission of greenhouse gases - Both landfills and incinerators emit methane and other carbon gases.
  • Necessitates a significant amount of land - landfill site, necessitates a large amount of land to dump city waste
  • Production of ash - Incinerator only.

Thus, these can be the description applies to landfills, incinerators, or both.

For more details regarding an incinerator, visit:

brainly.com/question/9642236

#SPJ1

4 0
2 years ago
Why can't land animals evolve a better eye
konstantin123 [22]

Answer:

Evolving takes thousands of years

Explanation:

Take dinosaurs for example they are now chickens and other birds. Evolving takes over hundreds to thousands of years

4 0
2 years ago
Which type of fault occurs when rock is subjected to this type of stress?
gavmur [86]

Answer:

strike-slip .

Explanation:

hope it helps !

mark me brainliest :)))

3 0
4 years ago
Read 2 more answers
Why is it a good thing to have a lot of genetic variation within a population or species?
g100num [7]

Answer:

A. If conditions change, you have a greater chance of someone having adaptations that allow them to survive and reproduce.

8 0
3 years ago
Read 2 more answers
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