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Pie
3 years ago
9

There are four types of Infectious Agents that can affect the human body. These are Viruses, Bacteria , Fungi, and Parasites.

Biology
1 answer:
zhuklara [117]3 years ago
3 0
No need no need for this to happen
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Which variable is the one that is adjusted by the esperimenter?​
zepelin [54]

Answer:independent variable

Explanation:

5 0
3 years ago
suppose That a colony of bacteria starts with 1 bacteria and doubles in numbers every half hour. How many bacteria will the colo
nadezda [96]

Answer:

281474976710656

Explanation:

As each half hour passes, the colony of bacteria doubles. Initially, the numbers are fairly low, but the amounts become larger and larger as they compound.

Hour 0- 1

Hour 0.5- 2

Hour 1- 4

Hour 1.5- 8

Hour 2- 16

Hour 2.5- 32

By hour 10, the bacteria will have increased to 1048576. By hour 15, the number of bacteria will be 1073741824. By hour 24, the colony will contain 281474976710656 bacteria.

8 0
3 years ago
An organism that uses organic molecules as carbon sources and obtains energy by oxidizing inorganic molecules is a(n) ________.
goldenfox [79]

Answer:

(d) - Chemoautotroph

Explanation:

Chemoautotrophs -

Autotrophs are the organism , that can prepare food by their own .

And ,

Chemoautotrophs are the organisms , that uses , inorganic molecules like carbon as their source , to generate energy via oxidizing the inorganic molecules .

The inorganic source of energy can be , ammonia , hydrogen , hydrogen sulfide .

Hence ,

The correct term for the given statement is (d) - Chemoautotroph .

5 0
3 years ago
1. What is used to trace men’s genetics? Why can this be used?
Bess [88]
<h2>Answer 1:</h2>

The researchers tracked genetic variation on the Y chromosome, the sex chromosome passed from father to son that encodes maleness, using a technique now widely used that was developed in the early 1990s by Underhill and colleagues in the lab of Luigi Cavalli-Sforza, professor emeritus of genetics. The method has given scientists a powerful window into ancient human migrations and prehistoric cultural shifts. The technique has also been adopted by some commercial genealogy services that offer Y-chromosome testing to the public.

This method was used because Y chromosome is only present in males.

<h2>Answer 2:</h2>

In sexual reproduction, mitochondria are normally inherited exclusively from the mother; the mitochondria in mammalian sperm are usually destroyed by the egg cell after fertilization.The fact that mitochondrial DNA is maternally inherited enables genealogical researchers to trace maternal lineage far back in time.

So to trace women's genetics we trace mitochondrial lineage.

<h2>Answer 5:</h2>

Early humans first migrated out of Africa into Asia probably between 2 million and 1.8 million years ago.

Scientist know this by fossil records and genetic analysis.

<h2>Answer 7:</h2>

Migration is a global phenomenon caused not only by economic factors, but also by social, political, cultural, environmental, health, education and transportation factors.

Socio-political, economic and ecological factors are the main forces driving migration. Rising communal violence world-wide, often as a result of ethnic or religious intolerance, has led to increased levels of migration.

<h2>Answer 8:</h2>

Filipinos (Filipino: Mga Pilipino) are the people who are native to, or identified with the country of the Philippines. Filipinos come from various ethnolinguistic groups that are native to the island country.

The professorial address synthesizes the findings of several studies on the genetics of Philippine population groups and presents them in a manner accessible to nonspecialists. These studies examined different types of DNA (Y-chromosome, mitochondrial, and autosomal) samples contributed by participants in twelve regional centers and nineteen ethnolinguistic groups. The data reveal (a) genetic affinities with different groups in the Asia-Pacific region, (b) genetic signals of ancient demographic events, (c) an ancient genetic history of about 5,000–50,000 years ago, and (d) a complex population genetic structure.

Philippines have the 99.9% of DNA same.

<h2>Answer 9:</h2>

When describing the effect climate has on human appearance it is important to remember that physical characteristics such as skin colour, eye shape or hair type are determined by genetics and that only over sufficiently long periods of time has the environment i.e climate, provided selective pressure to develop particular characteristics within a population.

The other factor is genetic influence on physical characteristics.

<h2>Answer 11:</h2>

The people in central Asia do not appear to have clear race because in central Asia people migrated from different areas of the world and not native of Asia.

Most of the people in the central Asia belongs to different tribes that do not have any clear race or nationality.


<h2 />
7 0
3 years ago
Read 2 more answers
What are infectious agents?
Hoochie [10]
The correct answer is C itook the test
8 0
3 years ago
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