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Nezavi [6.7K]
1 year ago
5

What is an allele that can have a harmful effect?

Biology
1 answer:
dolphi86 [110]1 year ago
5 0

Answer:

option A is correct i hope you like it

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The proposed kingdom Euglenozoa includes protists with one or two _____ emerging from an anterior pocket.
BigorU [14]
The proposed kingdom of euglenozoa includes protists with one or two flagella emerging from an anterior pocket
This flagella give them the ability to swim/moved throughout the water where they usually live

hope this helps

5 0
3 years ago
How do enzymes influence the amount of activation energy needed?
ser-zykov [4K]

What your cells have to help overcome a problem of high activation energy are called enzymes. Enzymes are proteins that lower the activation energy of a reaction. In doing this, enzymes increase the rate of a reaction, helping it to occur faster. However, enzymes are not consumed in a reaction; they simply help it to occur.

Enzymes make things easier for your cells to work properly and help chemical reactions occur. There are hundreds of different kinds of enzymes in your cells, which all participate in different types of reactions. Enzymes can break molecules apart, build or add molecules, and even rearrange them.

In lowering the activation energy of a reaction, enzymes decrease the barrier to starting a reaction. It's important to note, however, that the change in energy remains the same between the start and end of a chemical reaction.

8 0
3 years ago
Read 2 more answers
If false, please make it a correct statement. A rancher uses a particular chicken for breeding purposes because, on average, she
schepotkina [342]

Answer:

b) false

Explanation:

The given statement is false. the selection process used by the rancher is an example of artificial selection and not natural selection.

Artificial selection is defined as the selection process done by humans on the basis of desirable characters while in natural selection the selection is based on the  adaptive characteristics of animals. In the given example rancher choses a desirable character of chicken that lays more eggs.

Hence, the given statement is "false".

8 0
3 years ago
Biological control methods for managing insect pests are effective for reasons that include which of the following? They promote
Semenov [28]

Answer:

Option B, They generally focus on one target insect to ensure that the target insect population remains low.

Explanation:

Biological pest control methodologies are focused towards a specific species of pest and do not harm the non-targeted species. These methods are environment friendly and do not produce any harmful residues. Also they do not develop any kind of resistance in species due to which the same bio pesticide can be used again and again. Since these methods have high specificity, they may require usage of two or more bio pesticides all together.  

Hence, option B is correct

4 0
3 years ago
Describe the cell-surface events leading to neutrphil movement to site of infection.
Elina [12.6K]

Answer:

Neutrophils help fight infections because they ingest microorganisms and secrete enzymes that destroy them. A neutrophil is a type of white blood cell, a type of granulocyte and a type of phagocyte.

Explanation:

Neutrophils display adhesion glycoproteins on their surface to bind endothelial and subendothelial structures. They move randomly until they find a damaged site. Unless neutrophils are activated, endothelial cells do not tend to adhere. When inflammation mediators (IL-1, FNT) activate endothelial cells, they express P-selectin and E-selectin on the surface. The expression of glycoproteins and L-selectin cause the initial adhesion of the non-stimulated neutrophil to the activated endothelium, slowing it down by rolling it over the endothelium. Activated endothelial cells, opsonized particles, immune complexes, FEC-G, FEC-GM and chemoattractants produce factors that stimulate neutrophil activation. Expressing β2 integrin (endothelium adhesion molecule) Neutrophils expand and form pseudopods. Neutrophil activation also promotes degranulation, superoxide generation, and arachidonate metabolite production.

7 0
3 years ago
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