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aleksley [76]
3 years ago
6

In some individuals, the immune system attacks substances such as grass pollen that are usually harmless, resulting in

Biology
1 answer:
olga nikolaevna [1]3 years ago
8 0

Answer:

An allergic reaction

Explanation:

An allergic reaction occurs when our immune system misinterprets a harmless substance into a harmful antigen and initiate an over-expressed immune response against it. Some of these allergic substances are pollen, molds, insect stings, etc.

These allergens trigger the production of IgE antibodies in the body which interact with different cell and initiate the release of chemicals like histamine that cause symptoms of allergic reaction.

It can affect the nose, skin, lung, stomach lining, etc. Therefore the correct answer is an allergic reaction.

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What do you notice about the ligands and their receptors in these images?
aliina [53]

Answer:

What can be noticed about the ligands and their receptor is that the configuration of both coincide, as a key would with its lock, which demonstrates the specificity of a receptor by its ligand.

Explanation:

A <u>ligand</u> corresponds to a molecule considered a signal or a messenger, while the <u>receptor</u> is a protein on the cell surface, with the capacity to accept a ligand.

Ligands and receptors constitute pairs that complement each other, so that <u>each receptor can bind to a specific ligand</u>, similar to what happens with a key and a lock.

Once the ligand-receptor complex is formed, changes occur inside the cell, which define a certain effect.

8 0
3 years ago
Why does a pea plant with the genotype Rr produce some gametes that have the allele for round seeds?
Amiraneli [1.4K]

Answer:

The correct answer is - due to the law of segregation.

Explanation:

In the given case the genotype of Rr and as we know R is a dominant characteristic for round seeds and r represents the recessive allele for wrinkled seeds in a pea plant. So if a plant has Rr in its genotype it means it is a phenotypically round pea plant due to dominance in this heterozygous case.

The law of segregation states that two alleles of a gene of a specific trait will be distributed randomly and there is an equal chance of each allele to end up in the gametes, similarly in this case both alleles can be segregated to gametes and it is a random process.

3 0
2 years ago
The most numerous white blood cells in peripheral circulation are the
yan [13]

Answer:

the answer is neutrophils

8 0
3 years ago
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5 0
3 years ago
Which of the following statements is false? Sunlight is the energy source for plant photosynthesis. Chlorophyll is contained in
pentagon [3]
<span>Option 1: Sunlight is the energy source for plant photosynthesis.
True: In photosynthesis, plants convert light energy from the sun to chemical energy in the form of glucose. 

Option 2: Chlorophyll is contained in organelles called chloroplasts.
True: Chlorophyll in the chloroplasts is what allows many wavelengths of light for be absorbed and used for photosynthesis. 

Option 3: A by-product of photosynthesis is carbon dioxide.
False: Plants require carbon dioxide to create glucose, and produce oxygen as a by-product. 

Option 4: Roots have tiny root hairs that maximize the plant's ability to absorb water. 
True: Root hairs are very important for the absorption of nutrients and water by plant roots. </span><span /><span>
</span>
5 0
3 years ago
Read 2 more answers
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