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
Llana [10]
4 years ago
7

In 2009, h1n1 flu caused many cases of flu around the world. Research how h1n1 flu differs from the 1918-1919 flu.

Biology
1 answer:
RUDIKE [14]4 years ago
3 0
Flu (influenza) viruses are divided into four broad categories: influenza A, B, C or D. Influenza A is the most common type. H1N1 flu is a subtype of influenza A.

Subtypes of influenza A are categorized based on two proteins on the surface of the virus, hemagglutinin (H) and neuraminidase (N). There are many H and N subtypes, and each one is numbered. All H and N flu subtypes are influenza A viruses.

Each influenza subtype has many different strains of influenza virus. Not all strains infect people. Subtypes of influenza A viruses currently found in people are strains of H1N1 and H3N2. Each year's flu vaccine includes varieties of both of these strains and influenza B.

i hope this helps. please mark brainliest if it does :)
You might be interested in
Study the cladogram. Which two organisms would be the least related?
Svet_ta [14]
C. lizard and chimpanzee

8 0
3 years ago
Read 2 more answers
We breathe more quickly and deeply when we exercise. Why does this make sense? Select all that apply. a) Because when we exercis
storchak [24]

Answer:

a) Because when we exercise, we hydrolyze more ATP to ADP and Pi, and O2 is necessary for the hydrolysis, so we increase our intake of oxygen.

c) Because when we exercise, we produce more CO2 and increased ventilation is necessary to rid ourselves of CO2.

d) Because when we exercise, we use more ATP, and additional O2 is necessary to generate sufficient ATP.

Explanation:

During exercise , our body needs more energy in the form of ATP. This ATP comes from break down of food materials in the mitochondria of the cell during cellular respiration. With the addition of oxygen, more ATP is produced during respiration and this ATP is used by the body. With ATP, carbon dioxide is produced as a waste material which can be removed by exhaled out during breathing.

8 0
3 years ago
PLEASE HELP! Emma prepared two glasses of water at two different temperatures. She added a spoonful of table salt to the cold wa
Sergio039 [100]

Answer:

The correct answer is - option B. No, the temperature in glass #2 is lower, which makes salt less soluble in water.

Explanation:

For the majority of the solids dissolved in water, the solubility increases with temperature increments. Higher temperatures accompany the increase in kinetic energy permits the solvent particles to more adequately break apart the solute atoms that shows intermolecular attractions.

So if glass one dissolves the salt faster than glass two then it is clear that glass one has more temperature than glass two that takes more time to dissolve the rock salt.

Thus, the correct answer is - option B. No, the temperature in glass #2 is lower, which makes salt less soluble in water.

4 0
3 years ago
What is true for DNA but not for RNA? (PLEASE GIVE AN ACTUAL DIRECT ANSWER)
ZanzabumX [31]

hi!

the first and third ones are the answer

rna only has one strand

rna doesnt have thymine but it is replaced with uracil

3 0
3 years ago
The condition where fluid accumulation in the pericardial cavity compresses the heart and limits its ability to pump blood is ca
cluponka [151]
It is the cardiac tamponade.
5 0
3 years ago
Other questions:
  • What biomolecule determines whether an individual inherits the inability to produce the enzyme needed to break down the amino ac
    15·1 answer
  • The tiny exoskeleton of a diatom is composed mostly of calcium carbonate. <br> a. True <br> b. False
    7·1 answer
  • How to turn 77/200 in to decimal
    8·2 answers
  • Which organelle carries out photosynthesis?<br> Mitochondria<br> Chloroplast<br> Cell wall
    5·2 answers
  • Which characteristics is common of developing countries?
    15·1 answer
  • How many atoms of carbon are present in the molecule of galactose
    14·1 answer
  • 1. Describe the coronavirus structure and clinical features that presents in most cases.
    11·1 answer
  • Organ systems maintain which of the following at
    5·2 answers
  • What type of association is fern on palm trees and explain​
    8·1 answer
  • Which phases of mitosis ensure equal distribution of the genetic material in daughter cells?.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!