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shtirl [24]
3 years ago
12

In 2009, the h1n1 influenza virus caused illness around the world. an h1n1 virus was also responsible for the 1918 influenza epi

demic, as well as an influenza outbreak in 1976. some people who were born before 1953 were found to have some immunity to the 2009 h1n1 virus. how could they have obtained this immunity?
Biology
2 answers:
Lelechka [254]3 years ago
5 0
<span>They could have obtained it because in 1953 they were probably more healthy. Their immune systems were not so exposed to processed foods or so many human made sicknesses. However the 1918 epidemic might have gave a boost to self-protect the ones that were not affected.</span>
Goryan [66]3 years ago
5 0

Answer:

Spread of the 2009 H1N1 virus is thought to occur in the same way that seasonal flu spreads. Flu viruses are spread mainly from person to person through coughing, sneezing or talking by people with influenza. Sometimes people may become infected by touching something – such as a surface or object – with flu viruses on it and then touching their mouth or nose.

Explanation: trust me i tried both

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Read each statement and decide what type of ecological interaction it describes.
Artist 52 [7]

1. Camouflage

2. Competition

3. Competition

4. Symbiosis

<h3><u>Explanation</u>:</h3>

The camouflage is defined as the property of the living organisms that make them to prepare their body to perfectly match with their surroundings so that they cannot be recognised by their hunters. This makes them survive more in an environment with full of competition.

The competition is an interaction between the organisms where in a particular environment, different organisms compete for a particular prey for their living. Here the theory of the survival of the fittest work.

The symbiosis is an interaction between two or more species which leads to benifit of both the species in their living. Here one species help other in a form and other species do the same. There's benifit for both in the interaction.

7 0
3 years ago
Which of the following describes a difference between galaxies and solar systems?
LuckyWell [14K]

Answer:

A galaxy is a collection of millions of stars, while a solar system is a star and the planets around it.

Explanation:

You live in a solar system, we revolve around our sun and so do the other planets making up a solar system

3 0
3 years ago
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Which hypothalamic hormone contributes to the regulation of the male reproductive system? a. luteinizing hormone b. gonadotropin
Lostsunrise [7]

Answer:

The correct answer is option b. gonadotropin-releasing hormone.

Explanation:

The GnRH or the gonadotropin-releasing hormone is a releasing hormone that releases from the neurons of the hypothalamus. This releasing hormone is responsible for the secretion of the luteinizing hormone and follicle-stimulating hormone.

GnRH regulates both gonadotropin hormones, in which, LH (luteinizing hormone) responsible for the regulation of the male reproductive system and FSH (follicle-stimulating hormone) responsible for the female reproductive system and sperm production in testes in males.

Thus, the correct answer is option B. gonadotropin-releasing hormone.

3 0
3 years ago
Which type of cells will undergo mitosis.​
rodikova [14]

Answer:

eukaryotic cell...........only

5 0
3 years ago
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Mademuasel [1]
All living things have cells, they reproduce, they more in some king of way/ grow, and they use energy from some sort of water and food.
8 0
3 years ago
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