1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
leva [86]
2 years ago
15

. Why do some people require bifocals (

Biology
2 answers:
tresset_1 [31]2 years ago
5 0

Answer:

Bifocal lenses are used for people who are both nearsighted and farsighted. It is common for people who are over the age of 40 to begin to notice a change in their vision and require the need for bifocals. As we age, our eyes begin to have trouble focusing on objects at different distances away.

Explanation:

Vesna [10]2 years ago
4 0

Answer:

People have to wear bifocals most commonly because of a condition called presbyopia. This condition occurs naturally. It causes difficulties in the eye’s focusing abilities. Bifocals work to help the eyes focus more clearly, which is why people have to get them.

Explanation:

You might be interested in
Dose learing play a role in innate behaviors
Anika [276]
No learning does not play a role in innate behavior.
6 0
2 years ago
A commensal bacterium?
Otrada [13]

Answer

Commensal bacteria stimulate the immune system of the host to enhance defense mechanisms that block pathogen entrance and colonization.  Moreover, by creating antimicrobial properties and signals & fighting with other bacteria for food and attachment sites, such bacteria might effectively limit the spread of respiratory infections. In healthy animals, the majority of commensal bacteria live inside the intestine's lumen, although some are also found in immediate contact with the intestinal epithelium. New studies have shown that commensal bacteria may live in stable stomach lymphoid tissues. But every once in a while, especially when they travel to other areas and leave their natural habitat, these commensal bacteria might cause illness. In both old and very and also in young persons, it can spread throughout the rest of the body, causing pneumonia, infection, and meningitis.

You can learn more about commensal bacterium from the following link:

brainly.com/question/28474277

#SPJ4

6 0
1 year ago
What might be the best name for Lewis Howard Latimer
lianna [129]
If he's who I think he is:

A genius! :)

I might be thinking of someone else though!
7 0
3 years ago
Describe how the role of phloem would would be affected if the leaves start to die off
Naya [18.7K]
The conductive tissues of the angiosperms are the xylem which drives the raw sap and the phloem which conducts the elaborate sap.The phloem, or liber, drives the elaborate sap, solution of organic substances rich in carbohydrates, from the leaves to the other organs.

The elaborate sap (which contains organic substances produces by photosynthesis) is produced in the leaves, where the majority of the chlorophyll subsist, so if the leave die off, the production of organic substances and the elaborate sap are reduced, so its transport by the phloem will be reduced, and this is how the phloem will be affected by the dying of the leaves.
7 0
3 years ago
Helppp Pleaseee Ill give u pointssss
Ksenya-84 [330]

Answer:

I think it is F.

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • In-depth explanations and details
    9·1 answer
  • What is the maximum number of hours that good can be held in the danger zone?
    12·1 answer
  • In earth's history there has(have) been ____ major extinction event(s) leading to the loss of 50% or more of the species present
    14·1 answer
  • Why autotroph are important
    7·1 answer
  • The diffusion of _______ through cell membranes is called osmosis.
    15·1 answer
  • The main source of information used by astronomers to learn about objects in space is A. electromagnetic waves B. Comets C. Mete
    8·1 answer
  • Cellular division involves the redistribution of the nuclear material, or DNA, as well as the cytoplasm and organelles. During w
    6·1 answer
  • What will cause hemoglobin to more readily unload oxygen?
    12·1 answer
  • Do you think that tardigrades could hold the key to space travel. Why or Why not?
    13·1 answer
  • How does DNA polymerase move along each strand of DNA
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!