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4 years ago

Discuss the difference between emerging infectious diseases and reemerging infectious diseases. Give examples of each.

Biology

1 answer:

amid [387]4 years ago

5 0

Answer:

Emerging infectious disease is the one which has recently started to spread in human population. Either its cases are going up or its geographic range is expanding. Ex: HIV AIDS and H1N1 virus. Reemerging infectious disease is the one which had declined substantially in the past but now is emerging again. It survived in the past and adapted to the new environment to reemerge. Ex. Dengue and West Nile virus

Since 1970s around 40 infectious diseases have been discovered. There are many reasons for the spread of infectious diseases. As humans are able to travel anywhere they are getting exposed to foreign environment a lot. Population is also increasing which has lead to people living very close to each other. Contact with animals has also increased leading to exposure to various new pathogens.

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Faciliated diffusion is

BartSMP [9]

Answer:

Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins.

Explanation:

From Wikipedia

7 0

3 years ago

In a population of plants, the allele for long stems (S) is completely dominant over the allele for short stems (s). If 35% of t

Sergio [31]

Answer:

The correct answer would be 48 percent.

It can be solved by using the Hardy-Weinberg equation.

p² + 2pq+ q² = 1

p + q = 1

where, p² represents homozygous dominant's frequency that is, SS in this case,

q² represents homozygous recessive's frequency that is, ss in this case,

2pq represents heterozygous dominant's frequency that is, Ss in this case.

p represents dominant allele's frequency and q represents the recessive allele's frequency.

Now, the percentage of homozygous recessive or short stems is 35%. Therefore, the frequency of homozygous recessive would be 0.35.

Thus, the value of q² = 0.35

So, q = $\sqrt{0.35}$ = 0.59 which is approximately equals to 0.6.

As p + q = 1 so, q = 1 - 0.6 = 0.4

The frequency of heterozygous (Ss) = 2pq = 2(0.6)(0.4) = 0.48

Hence, the frequency of heterozygous would be 48 percent.

8 0

3 years ago

What is a young, anucleate erythrocyte called?

VARVARA [1.3K]

The right answer is reticulocyte.

The reticulocyte is the cell preceding the erythrocyte stage in erythropoiesis. He is almost like her.

Reticulocytes are young red blood cells that still have ribosomes and mitochondria, but no peroxisomes. They are therefore capable of a fairly intense metabolism and they still actively synthesize hemoglobin.

7 0

3 years ago

Which organelle is the large storage organelle for a plant cell and can sometimes be found in an animal cell, but is usually sma

zzz [600]

Answer:

The vacuole. Large in plant cells but small in animal cells

7 0

3 years ago

Scientists claim that global climate change is threatening many species with extinction. Which statement provides the strongest

solniwko [45]

Answer: Option B

Explanation:

The animals that live on the earth in many different regions because they are adapted to live in a particular habitat. The animals of the polar regions cannot adjust living the Sahara desert and the reptiles living in the desert cannot live in polar regions.

But many of the species are dependent on the seasonal change and they only emergence or produce during specific period of time.

But if due to global climatic change there will be no emergence of particular species and their species will be extinct over a period of time. So, the global temperature needs to be constant in order to support life of the species dependent on the seasonal temperature change.

8 0

3 years ago