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Neko [114]
4 years ago
5

Which event is most likely to cause a widespread influenza outbreak?

Biology
2 answers:
ioda4 years ago
5 0

Correct answer : B). People do not have immunity to a new strain of the influenza virus.

The main problem with the influenza virus is that these viruses constantly changes their DNA, this allow them to invade the immune system. It works as follows, if a  person is affected by the influenza virus then the body prepares antibodies against it.

But influenza virus changes its genetic makeup after sometime, so the older antibodies will not be able to recognize the new virus and the body get infected. That is the main reason for the outbreak of the influenza virus

Hence, the correct answer would be option B.


jok3333 [9.3K]4 years ago
4 0
The answer they are looking for is B, I don't believe in vaccines but that is the one they are looking for
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The carbon atom is sometimes listed as carbon-12 and sometimes as carbon-14 what does this mean? PLZ HELP THIS IS URGENT
nikklg [1K]
Carbon-12 has 6 neutrons and 6 protons, making it 12.
Carbon-14 has 8 neutrons and 6 protons, making it 14.
It is used to date the age of things that are very old using radioactive isotopes.
5 0
4 years ago
Two organisms with genotype aabbccddee mate. These loci are all independent. What fraction of the offspring will have the same g
UNO [17]

Answer:

100%

Explanation:

The given parental genotype is homozygous for all the genes. According to the given information, both the parents are homozygous for five genes and have genotype "aabbccddee". Since both the parents are homozygous for all the loci, meiosis during gamete formation would result in the formation of all same types of gametes from both the parents.

Both the parents will form all the gametes with an "abcde" genetic constitution. The random fusion of gametes with a given genotype will form all the progeny with genotype "aabbccddee". Therefore, the given parents will produce 100% genetically identical progeny to them.

6 0
3 years ago
3. What sedimentary rock is made up of pieces
ELEN [110]

<u>Coquina</u> is the sedimentary rock is made up of pieces  of shells.

Two types of sedimentary rock: Clastic and chemical sedimentary rocks

Explanation:

Coquina is the sedimentary rock formed by fragments or pieces of shells of marine animals like mollusks, brachiopods, trilobites and certain invertebrates.

The shells of marine animals are fragmented due to abrasion and mechanical degradation and sorting by the wave action and chemicals present in the sea water and gets transported which then sediments to form rock structures called coquina. The shells mostly contain calcium carbonate.

Chalk is the sedimentary rock formed b the fossil shells fragmented from foraminifers. This is a more powdery type of limestone.

Depending upon the type of sedimentation, sedimentary rocks are of three types:

Clastic – Made from sedimentation of clastic (pieces from broken rocks) through the processes of mechanical weathering and lithification (cementing and compacting). sandstone, conglomerate

Chemical – Made from evaporation of water and precipitation of materials which were previously dissolved in a solution. Example: Rock salt, dolomite

Organic – Repeated accumulation and sedimentation of organic matter or remains from plant and animal sources like bones (calcium deposits). Example: coal.

3 0
3 years ago
What is the difference between a gene and a allele?
Lerok [7]

Answer:

A gene is a portion of DNA that determines a trait. A trait is a characteristic, or a feature, passed from one generation to another, like height or eye color.

Explanation:

"Genes come in multiple forms, or versions. Each of these forms is called an allele. For example, the gene responsible for the hair color trait has many alleles: an allele for brown hair, an allele for blonde hair, an allele for red hair, and so on."

5 0
4 years ago
Imagine you are sitting in a very quiet room when suddenly behind you there’s a very loud bang, like a firecracker exploding.
lisov135 [29]

Answer:

A. I would be startled by the sudden noise and would probably take cover some wheres. B. My nerves in my ears would send a signal to my brain causing my twitching muscle fibers to react quickly and heart might stop for a moment.  C. The heart rate would increase the brain would be aware that there may be more sudden noises or events your adrenaline would be pumping and your quick twitch muscle fibers would probably be tense or contracted ready to make quick sudden movements if necessary and your hairs would stick up i guess as extra senses for if something would touch you.  

Explanation:

not to mention but by the time you are startled your senses would probably be heightened due to you being  aware of your surroundings such as you would be constantly looking around you would hear better and probably move quicker for a short period of time due to pumping adrenaline.

5 0
3 years ago
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