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
Nutka1998 [239]
3 years ago
10

When a large percentage of a population is vaccinated against an infection, the causative microbe is unable to spread easily thr

ough that population. Because of this, susceptible individuals who cannot be vaccinated are protected to some extent by the community around them. This phenomenon is known as _____________.
-herd immunity-subunit vaccination-passive immunization-adjuvant protection
Biology
1 answer:
ki77a [65]3 years ago
5 0

Answer:

Herd immunity

Explanation:

Herd immunity refers to the resistance of a group of people against infection and the spread of a pathogen. It occurs when a high proportion of the members of that group are resistant against a particular pathogenic infection. When an earlier exposure or vaccination of a large proportion of individuals of a population does not allow the pathogen to spread among and infect the otherwise susceptible members of the population, the population is said to have acquired the herd immunity.

In the given example, vaccination of a large percentage of a population protected the susceptible individuals against a particular microbe. This represents an example of herd immunity.

You might be interested in
Adding an organism to a food chain does not affect the other members of the food chain, but removing an organism does.
erica [24]
False. Both adding and taking away an organism affects a food chain.
7 0
3 years ago
HELP SOS PLEASE !!!!! (ONLY CORRECT ANSWERS PLEASE)
Phantasy [73]

Answer:

1- Option A) describes an index fossil. Trilobite existed for a short time, but was abundant and lived in many locations.

2- Option B) Continents were once joined and have since drifted apart.

Explanation:

1) Fossils are animal and vegetable rests found in different strata of sedimentary rocks. Sedimentary layers deposit chronologically, so they are used to reflect history. They keep in each layer some of the forms of life that inhabited that area in the past. These fossils turn to be very useful while dating ages. The term Index fossils refer to those fossils that only existed in a given era or geological period during evolution.  

Index fossils must:    

• Be easily recognizable and distinguishable from all the other fossils

• Have lived in a relatively short geological period

• Present a wide geographic distribution

• Have lived in different sedimentary basins

• Appear in different types of rocks

• Be abundant

<em>A) Trilobite existed for a short time, but was abundant and lived in many locations. </em>The species accomplish the requirements. It is easily recognizable, had a wide geographic distribution, was abundant, and lived for a short time.  

2) The tectonic plates theory states that there is a continual movement of the crust. It explains the movement of the different plates and their directions and interactions. The continental drift theory explains how these movements have been taking place since millions of years ago. When continents were together in a unique continent, many species used to inhabit it. When plates started to separate, they took some of these species that got apart by the ocean. Some species were already dead and fossilized, while some other organisms died during continental drift and got fossilized after the divergence. <em>The existence of the same fossils, placed in the same layers and of the same age, suggests that they used to inhabit the same area and died during the same time, meaning that continents were together when they got fossilized. </em>

5 0
3 years ago
During elongation, RNA polymerase has three prominent channels, or grooves. These channels provide sites for all of the followin
kirill [66]

Answer:

<h2>A site for the exit of the diphosphates removed from the nucleotide triphosphates.</h2>

Explanation:

Transcription occurs in three steps, i) initiation, ii) elongation, and iii) termination.

Elongation: during elongation , the RNA polymerase add new nucleotides in the growing chain of RNA molecule until it encounter terminator factor, or until it terminate transcription.  RNA polymerase has three prominent channels, i) channel for entry of DNA template strand, ii) channel for exit of DNA strand  and iii) channel for exit of newly synthesized RNA molecule. There are lots of other enzymes which helps in transcription.

4 0
3 years ago
2. How do your respiratory and circulatory systems attempt to maintain homeostasis during exercise?
Nutka1998 [239]
I think it is D. You experience increase in breathing rate to obtain more oxygen which is delivered to cells through the bloodstream
6 0
3 years ago
Read 2 more answers
In the above diagram of an animal cell<br>​
Nookie1986 [14]
It’s D-give the cell structural support, encloses the cytoplasm, and helps regulate what enters and exits the cell
8 0
3 years ago
Other questions:
  • Describe how environmental change can impact ecosystem stability
    13·1 answer
  • Plants with a tube system for transporting materials are ___________ plants
    12·1 answer
  • Which of the following is a characteristic of all organisms
    10·1 answer
  • Replication of DNA takes place in the ______ during the ______ phase of Interphase.
    6·1 answer
  • As air pollution continues to be released into the atmosphere, what becomes more depleted, resulting in an increase of ultraviol
    15·2 answers
  • Briefly describe the lymphatic system
    12·1 answer
  • Julio is studying the evolutionary history of desert cottontail rabbits, sea otters, and grizzly bears. All three species share
    15·2 answers
  • fault generally occurs at a transform boundary. O A. normal OB. strike-slip O C. thrust O D. reverse ​
    9·1 answer
  • 'A', 'C' and 'B12' are examples of what substances?​
    6·2 answers
  • Why is "blue cheese is better than cheddar cheese" not a good hypothesis?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!