what are infectious agents?

A. agent that investigates different types of infection
B. attackers that can cause a response by the immune system
C. attackers that cannot cause a response by the immune system
D. infectious agents are always good for the human immune system.

Answers

Answer 1
The right answer is A I took the test

Related Questions

PLEASE HELP I WILL GIVE BRAINALIST AND EXTRA POINTS

Answers

Answer:

Coal-fired power plants

Explanation:

Generally speaking coal-fired power plants emit more greenhouse gas, however both emit greenhouse gases in large quantities.

Describe the contributions of Schlieden and Schwann to the cell theory.

Answers

Schwann - In 1839, he cells are the basic unit of animal structure

Schlieden - In 1838, he discovered cells are the basic unit of plant structure

Hope this helps

How are water scarcity and water pollution related?
Water pollution is a solution to water scarcity.
Water scarcity contributes to water pollution.
Water pollution contributes to water scarcity.
Water scarcity is a solution to water pollution.

Answers

Answer : C: Water scarcity contributes to water scarcity.

Explanation: One of the largest causes of water scarcity across the world is pollution. ... Pesticides and other fertilizer use by farmers can also lead to water pollution if the chemicals seep into the groundwater or in underground aquifers. The misuse of water resources is another massive issue that leads to water scarcity.

The Yersinia pestis bacteria cause what disease?
O Hantavirus
O Rabies
Plague
Ringworm

Answers

Answer:

Plague

Explanation:

The Yersinia Pestis bacteria causes Plague.

Explain what the greenhouse effect is, use diagrams if you wish.
Include:
-Radiation from the sun absorbs earths heat
-Some emitted
-Trapped by the greenhouse

Answers

Answer:

See the answer below

Explanation:

The greenhouse effect refers to the heating effects produced by the earth's atmosphere on the planet as a result of the atmosphere absorbing reflected radiation from the sun by the earth.

The earth's atmosphere is a blanket of gases, some of which are referred to as greenhouse gases. These gases have the capacity to trap radiations coming from the sun that is reflected by the ground layer of the earth. Thus, they produce a warming effect on the earth.

A bulk of the radiation coming from the sun is reflected back into space by the earth's stratosphere. The small percentage that passes through are dispersed in different directions and some of them pass through the atmospheric blanket to reach the ground layer of the earth. While some are absorbed by the ground itself, some are emitted back into the atmosphere where the greenhouse gases trap a large portion and prevent them from escaping back into space.

This leads to the warming of the earth and the entire phenomenon is referred to as the greenhouse effect.

For this cell division, you can see that 4 daughter cells are made that have half the genetic information as the original. What type of cell division is this?

a) Diffusion
b) Mitosis
c) Meiosis
d) Photosynthesis​

Answers

Answer:

The cell division where 4 daughter cells with half of the genetic information of the original are obtained is meiosis (option c).

Explanation:

Meiosis is a type of cell division through which sex cells or gametes are obtained. It is a reductive division, since the daughter cells resulting from the process contain half of the chromosomal charge with respect to the original one.

In the process of meiosis, four haploid cells are obtained from a diploid cell, each of which is involved in the reproduction of the species. This mechanism of division occurs in two stages, called meiosis I and II.

The other options are not correct because:

    a) Diffusion: it is a passive trans-membrane transport mechanism.

    b) Mitosis: is the cellular division of somatic cells, where the result is two daughter cells identical to the original.

    d) Photosynthesis: is the mechanism by which plants obtain energy and nutrients, from solar energy.

PLEASE HELP I NEED TO GET THIS QUESTION RIGHT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
A flask filled with water and organic molecules was left open to the air for an hour and then was tightly stoppered. After being allowed to sit for a week, the flask was reopened and checked for living organisms. Only anaerobic bacteria were found living in it. Which of the following can be assumed about the conditions within the flask during the week it sat tightly stoppered? (4 points)


Group of answer choices


There were carbon-based gases in the water.


There was abundant oxygen in the flask.


There was no oxygen in the flask.


Sunlight must have entered the water.

Answers

Answer:

There was no oxygen in the flask.

Explanation:

Anaerobic organism do not need oxygen!!

Which best describes the relationship between digestion and cellular respiration? O A. Digestion breaks foods down to simple sugar molecules, and respiration uses the sugar molecules to produce energy. O B. Digestion creates nutrients from food particles, and respiration uses the nutrients to produce energy. O C. Digestion releases oxygen molecules from food, and respiration uses oxygen molecules to produce energy. D. Digestion produces waste materials, and respiration uses the waste materials to produce energy.​

Answers

Answer:

Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products


16.Which type of sediments would be most common where a river meets an ocean?
A. biogenous
B. cosmogenous
C. hydrogenous
D. lithogenous

Answers

C sounds most likely because HYDROgenous and Hydro means water
Answer has to be C . HYDROgenous

i need help asap pls help

Answers

Answer: okay im pretty sure its B) ...hope this helped!

Explanation:


Which of the following are examples of stimuli?
Check all that apply.
-the strong smell of a woman's perfume
-the sour taste of a lemon
-pinching your skin
-dimming the lights in a room
-having your back massaged

Answers

Answer:

The answer is all of them

Explanation:

This is the answer because I’m a genius. You’re Welcome

Examples of stimuli are the strong smell of a woman's perfume, the sour taste of a lemon, pinching your skin, dimming the lights in a room, and having your back massaged. The correct options are a, b, c, d, and e.

What are stimuli?

Humoral stimuli, hormonal stimuli, and neurological stimuli are the three basic types of stimuli that cause the endocrine glands to produce and release hormones.

With changes in the concentration of extracellular fluids, the humoral stimulus governs hormone release.

The strong smell stimuli the sense organs and sour taste stimuli our tongue and pinching in the skin gives stimuli to obtain that someone pinched pour skin

The neural stimuli allow hormone production straight from the glands.

Therefore, the correct options are a, b, c, d, and e.

To learn more about stimuli, refer to the below link:

https://brainly.com/question/2917504

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Adaptation is a change in a species over many generations. What is the cause of this change?

A.
The environment changes over time.

B.
Species pick traits they like.

C.
Over time, species become more like their ancestors.

Answers

Answer: is C

Explanation:

Answer:  The correct answer is A. The environment changes over time.

Explanation:  Adaptations allow species to be able to survive in changing locations, like Darwin observing changes in bird beaks based on their available food sources.

In the late 1800s, a biologist studying animal embryos coined the phrase "ontogeny recapitulates phylogeny," meaning that the physical development of an animal embryo (ontogeny) seemed to retrace the changing form of the species during its evolutionary history (phylogeny).

Why would embryonic development retrace evolutionary steps?

Answers

Answer:

Embryo provides information about their ancestors.

Explanation:

Embryonic development retrace evolutionary steps because embryo provides evidence for evolution as embryo formation in widely-divergent groups of organisms are conserved. This embryo provides information that leads to their ancestors from which they evolve so we can say that embryonic development provides evidence for evolution of an organism.

how do hot objects preduce heat

Answers

When the electromagnetic waves strike an object they are partially absorbed and the energy that the waves carried is converted to heat

A section of a topographic map is shown below.



What is the difference in elevation in meters between Point X and Point Y on the map?

Answers

Answer:

360 m

Explanation:

Answer:

fish

Explanation:

moment

Urea diffused in all regions of the filter during countercurrent flow. Using what you know about the sizes of urea and potassium, which graph shows what would happen to potassium during countercurrent flow?

Answers

Answer:Diffuse in all regions of the filter

Explanation:The potassium level in dialysis is often lower than usual because of incomplete equilibration

when would anaerobic respiration be used instead of anaerobic respiration?​

Answers

Answer:

produce 2 anaerobic respiration

can someone please answer this for me ?

Answers

the answer is hibiscus tea

Answer:

A: X Chromosome

B: Centromere

C: P Arm - Short Arm Structure

D: Q Arm - Long Arm Structure

E: DNA Molecule

F: Chromatids

Explanation:

The X chromosome does more than determine sex. We inherit one copy of each chromosome from each parent, and the different versions of genes present on each copy, called alleles, help determine our individual characteristics.

Vhat function does the cytoplasm perform in plant and animal cells?
A. It directs cellular activity.
B. It holds the cell organelles.
C. It forms a cellular boundary.
D. It makes proteins for the cell.

Answers

the answer is b ..........

Explanation:

b

Does this satisfy the octet rule why or why not

Answers

Answer:

No, it does not, because the octet rule says that an atom needs to have eight electrons in its valence shell to be stable. The exceptions are hydrogen and helium, which need only two electrons

Answer: No it doesn’t

Explanation:

Please help, I’m confused and have little time!

1. How does your DNA differ from other peoples?how is it similar

2.How does your DNA differ from a strawberries DNA? How is it similar

Answers

Answer:

1.DNA is more than 99% similar between any two people. All the differences in how we look, feel, behave and the differences in our health are due to less than 1% difference

2.In humans each of these cells have 2 copies of the DNA, but in strawberries each of these have 8 copies of the DNA that means strawberries have 4 times as many copies of DNA as humans, making it 4 times easier to see.

Explanation:

Is sharks and crocodiles closely related

Answers

Answer:

More recent phylogenetic analyses, based on mitochondrial DNA, have suggested that the crocodile shark is closely related to either the megamouth shark or the sand sharks (Odontaspididae).

Answer:

yes??

Explanation:

look at the other answer

how do you know that individual 1 is heterozygous for the trait

Answers

Heterozygous is having 2 different alleles of a certain gene, meaning one is not dominant. Instead one is a recessive such as Aa

According to the key, which statement best describes Fiordland crested penguins? A. They have only black and white feathers and live north of the equator. B. They have yellow or orange feathers on top of their heads and no bare skin around the base of their beaks. C. They have only black and white feathers and live south of the equator. D. They have yellow or orange feathers on top of their heads and bare skin around the base of their beaks.

Answers

b! good luck on your test/assignment! x - cloudie

Select all that apply.
Which of the following statements are true?
A purebred organism can either be TT or tt.
The combination of two genes determines the genetic trait of an organism.
Recessive genes will sometimes be masked by dominant genes.
It is possible for two genetically different plants to have the same phenotype.

Answers

Answer:

A purebred organism can either be TT or tt.

It is possible for two genetically different plants to have the same phenotype.

Explanation:

Which of the following describes Mendel's law of segregation?

During DNA replication, the alleles separate into haploid daughter cells

Alleles of a trait can never be separated from each other.

During meiosis, the two alleles for a trait separate into different gametes


During meiosis, two alleles that were separated come back together

Answers

from what lesson is this from? Just need to know

Dr. Sanchez and her team have observed an unusual star in the Andromeda galaxy. Their data suggests that the star is being consumed by a nearby black hole. They write a scientific paper about their work and submit it to a scientific journal. Other scientists read their paper and look for the unusual star as well. The other scientists are participating in which activity?

Answers

Answer:

so the answer is peer review

Explanation:

Yes, other scientists are participating in this activity not in a direct way but in an indirect way. The scientists are participating in peer review.

What is galaxy?

The scientific paper was written by scientists which provide the data and conclusion of entire experiments. To write scientific experiments we need to collect data, frame hypotheses, research methodology, and find out the conclusion are some of the steps to writing a scientific paper.

Testing hypotheses often involves designing experiments. In the given experiment Dr. Sanchez found that star is consumed by a nearby blackhole. But other scientist found the unusual star as well.

This suggests that both scientist thought on different aspect. This suggest peer review.

Therefore, Yes, other scientists are participating in this activity not in a direct way but in an indirect way.

To learn more about Scientific papers, refer to the link:

https://brainly.com/question/1716162

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Replicate the following DNA sequence: TTA

Answers

Answer:

AAT

Explanation:

use AT GC to replicate dna sequence

Which does not require a moist environment for reproduction?
fern
moss
conifer

Answers

Answer: Conifers

Explanation: they do not rely on water to unite sperm and egg.

1. Explain why fossil evidence is consistent
with the scientific theory of evolution. sc.7.L.15.1

Answers

Explanation:

The Fossil Record

Fossils of the simplest organisms are found in the oldest rocks, and fossils of more complex organisms in the newest rocks. This supports Darwin's theory of evolution, which states that simple life forms gradually evolved into more complex ones.

Evidence for early forms of life comes from fossils.

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