Which best describes a molecule?

a unit made of different kinds of elements
a unit made of only one kind of element
a unit made of two or more atoms
a unit made of a single atom

Answers

Answer 1

A unit made of two or more atoms.

Answer 2

Answer:

C

Explanation:

A molecule is a unit made of two or more atoms.


Related Questions

Which term is defined as elements that are found in the environment

Answers

Answer:

Natural Resources

Explanation:

The basic components of the environment are atmosphere or the air, lithosphere or the rocks and soil, hydrosphere or the water, and the living component of the environment or the biosphere.

If the first child of two parents with polydactyly does not exhibit this trait, what is the probability that their next child will have polydactyly

Answers

Answer:

No

Explanation:

Just because you are deferant dose not mean that your baby wourld have to turn out that way.

can someone go to my profile and write the definitions in your own words that I posted today? there are 4 of them and I can give you brainliest for each of them since there would be more than one person.

Thank you!

Answers

Answer:

ok i go

Explanation:

your experience is so so good and your frofile

is variation always caused by the surroundings?

Answers

Answer:

Some variation is the result of differences in the surroundings, or what an individual does. This is called environmental variation.

Question:

Is variation always caused by the surroundings?

Answer:

Some variation is the result of differences in the surroundings, or what an individual does. This is called environmental variation.

Hope it helps you

Which statement best describes an organ?
A. This is the most complex level of organization of life.
B. Cells of one type work together to carry out a function
C. Different types of tissues work together to carry out a function
D. This is the simplest level of organization of life.

Answers

Answer:

I believe the answer is C.

C is the answer by definition

In the gragh the y - i tercept of line is

Answers

Answer:

In the gragh y-intercept is the point.

think about what you know about plant roots. how do plants absorb mineral salt from the soil?​

Answers

Answer:

Plants absorb water from the soil by osmosis and they absorb mineral ions from the soil by active transport, against the concentration gradient.

Why does the thermosphere increase in temperature as altitude increases?

Answers

Answer:

The thermosphere is the outer layer of the Earth's atmosphere, extending from about 53 miles to more than 370 miles above the surface. The temperature increases rapidly in this layer due to the absorption of huge amounts of incoming high energy solar radiation by atoms of nitrogen and oxygen.

Explanation:

Question in the picture

Answers

Answer:

bbbb

bbbbbbbbbbbbbbbbbbbbbb

Select from the drop-down menu to correctly complete this statement.
Inside the chromosomes are molecules that contain all information an organism needs to grow and reproduce. This is its __________.

Answers

Answer:

DNA

Explanation:

DNA's are the molecules that present inside the chromosomes.They contain all the information an organism needs to grow and reproduceDNA stands for deoxyribo neuclic acid

How does reproductive isolation cause speciation?
A. It flows interbreeding.
B. It stops adaptive radiation.
C. It reduces gene flow.
D. It prevents divergence.

Answers

Answer:

C. It’s reduces gene flow.

Explanation:

Reproductive isolation cause speciation as it reduces gene flow. Therefore, the correct option is C.

Mechanisms that prevent or restrict the exchange of genetic material (gene flow) between populations are called reproductive isolation. When reproductive isolation occurs, populations become genetically isolated from each other, resulting in different evolutionary paths. This may eventually lead to the speciation or evolution of new species. Reproductive isolation limits the exchange of genetic variation between populations by limiting gene flow. This means that genetic changes, such as mutations or genetic drift, that occur in one population do not affect other populations in the same way.

Therefore, the correct option is C.

Learn more about Reproductive isolation, here:

https://brainly.com/question/29138803

#SPJ6

Describe how pollution can cause acid rain, and how acid rain affects the ecosystems of surrounding areas?

Answers

Pollution specifically air pollution can cause acid. Gases such as sulphur (IV) oxide and Nitrogen (IV) oxide when they are released into the atmosphere and comes into contact with precipitation, that is rain water causes acid rain. Sulphurous acid and Nitric acid is formed thus the rain falls in acidic form.

Acid rain when it falls on the leaves of the flora (plants) causes removal of the green colouring matter (chlorophyll) thus making plants to be deficient of food. Food in plants is made my the process of photosynthesis, removal of chlorophyll in plants kills them due to lack of food.

Also when acid rain finds it's way into the water bodies through surface runoff, aquatic animals such as fishes die due to lack of favourable environment and oxygen deficiency in water. Acidity in the soil also kills important decomposers therefore soil aeration is altered.

acid rain can affect the surrounding areas by ruining its ecosystem

After a severe burn, new skin may grow outward from the hair follicles. Why would new growth originate at the hair follicles

Answers

Answer:

xsdcfvgbhnj

Explanation:

Drag the tiles to the boxes to form correct pairs.
Earth's early atmosphere was made of various gases that were unsuitable for life on Earth. Match the following elements with how they ended
up in the current atmosphere.
nitrogen
carbon dioxide and water vapor
helium
released into the atmosphere during volcanic eruptions
formed due to the transformation of ammonia (NH3)
mostly escaped Earth's atmosphere due to it is light mass

Answers

Answer:

Nitrogen ---- formed due to the transformation of ammonia (NH3)

carbon dioxide and water vapor ----- released into the atmosphere during volcanic eruptions

helium ------ mostly escaped Earth's atmosphere due to it is light mass.

Explanation:

Nitrogen are formed due to the transformation of ammonia (NH3) due to action of beneficial nitrogen, carbon dioxide and water vapor are released into the atmosphere during volcanic eruptions and helium mostly escaped Earth's atmosphere due to it is light mass. Helium has atomic mass i.e. 2 which is second lowest after hydrogen mass so due to its lighter weight it can't be stay in the atmosphere near to earth.

Answer:

Nitrogen - formed due to the transformation of ammonia (NH3)

carbon dioxide and water vapor - released into the atmosphere during volcanic eruptions

helium - mostly escaped Earth's atmosphere due to it is light mass.

Cationic detergents are surface active agents, also known as ______, which damage bacteria by binding bacterial surface proteins and disrupting ______.

Answers

Surfactants; cell membrane

A(n)____is the product of gametes from two different
sources.

Answers

Answer:

I guess the answer is meiosis

Explanation:

Maybe yes or no but am 98% sure so it's ur lucky day. haha

In a normal conception (fertilization of egg and sperm), due to the processes crossing over and independent assortment:

Answers

Answer:  Hello your question is missing below is the intended question

Which of the following supports genetic diversity?

A- Independent Assortment

B-independent assortment and crossing-over support genetic diversity

C-Independent assortment, crossing-over, and fertilization of an egg by sperm support genetic diversity

D-Fertilization of an egg by a sperm

E-Crossing-over

answer :

Independent assortment, crossing-over, and fertilization of an egg by sperm support genetic diversity ( C )

Explanation:

The processes that supports Genetic diversity are ; Fertilization of egg and sperm, Independent assortment and processes of crossing over

Genetic diversity is the simply the variations seen in genetic composition among a population or specie.

For a reaction, A H= 2 kJ. For which value of TA Sis the reaction spontaneous?

Answers

Answer:

option a is the answer I think so

Answer:

option a

Explanation:

For which value of TA Sis the reaction spontaneous?

A diagram shows a potato producing new tubers. Buds on the parent plant grow into stems that grow downwards called stolons. The end of each stolon develop in to new tuber.

1) Give two pieces of evidence which show that this is an asexual method of reproduction.

2) Explain why all the new tubers will be genetically identical.

Answers

Answer/Explanation:

Asexual reproduction is a type of reproduction in which new organisms that are identical are formed form a parent without the fusion of male and female gametes and do not require fertilization. Offspring formed are usually identical genetically, and are referred to as clones of the parent. Usually, only one parent is involved.

1. Two pieces of evidence that shows the potato growing is an asexual method of reproduction are:

i. Only one parent is involved

ii. The new tubers are identical (clones of the parent)

2. Reasons Why the new tubers will be genetically identical:

i. They grow from 1 parent by asexual reproduction

ii. No mixing of male and female gametes, so no exchange of genes takes place

What percentage of the nation’s demand for electricity could be produced in the future by wind energy?

5 to 10 percent

25 to 30 percent

70 to 75 percent

40 to 50 percent

Answers

I think 25- 30% I’m not sure

The DNA of a prokaryote is arranged in a single coiled chromosome located in a region called the ____________ . Some prokaryotes carry genes on extrachromosomal pieces of circular DNA called ____________ .

Answers

Answer:

1. Nucleoid

2. Plasmid

Explanation:

Prokaryotes are groups of organisms characterized by the lack of a membrane-bound nucleus in their cell. Due to this, the genetic material (DNA) of prokaryotes are found naked i.e. not housed. The DNA of a prokaryote is arranged in a single coiled chromosome located in a region of the cell called NUCLEOID.

However, some prokaryotes e.g. bacteria carry genes on extrachromosomal pieces of circular DNA called PLASMID. Plasmids carry certain genes like antibiotic resistance genes.

what is cell membrane ?​

Answers

Explanation:

the thin outside layer that surrounds the cytoplasm of a cell and controls the movement of materials into and out of the cell. cell membrane.

hope it helps.stay safe healthy and happy....

The type of electromagnetic waves with a longer wavelength than infrared waves are ____.

a) ultraviolet waves
b) gamma rays
c) microwaves
d) visible light waves

Answers

Answer:

c.microwaves

Explanation:

This are microwaves because electromagnetic waves with a longer wavelength

66. A 64-year-old woman, who has always been proud of her suntanned, healthy look, is referred to a dermatologist with a blue-violet, painless, 1.5-cm lump in the skin of her left shoulder. The lump is firm and cannot be moved, and has grown very rapidly over the past few weeks. The mass is removed surgically and the pathologist diagnoses it as a Merkel cell carcinoma. If the UV radiation to which her skin was exposed affected the Merkel cells, what other cell type sharing the same specific epidermal layer might also be affected

Answers

Answer:

Basal stem cells for keratinocytes

Explanation:

Keratinocytes are epidermal cells located in the outermost layer of the skin (i.e., the epidermis). Moreover, the cells located in the basal layer of the skin are known as basal keratinocytes or basal cells. These basal cells are proliferative cells that undergo differentiation in order to form suprabasal epidermal layers. Merkel cells are neuroendocrine cells that are located in the basal layer of the skin (scattered among basal keratinocytes), which are attached to surrounding keratinocytes by intercellular junctions called desmosomes.

You are viewing an organ of the respiratory system and note the following tissues: folded mucosal layer containing simple cuboidal epithelium and smooth muscle, shifting into simple squamous epithelia. Identify the organ.

Answers

Answer:

Respiratory bronchiole  

Explanation:

The respiratory bronchioles represent the narrowest airways within the lung, being continuations of terminal bronchioles that have approx. 0.5 mm in size. The epithelium of the respiratory bronchiole is composed of cuboidal ciliated cells and a small number of non-ciliated (secretory) Clara cells. The respiratory bronchioles lead into alveolar ducts composed of smooth muscle and connective tissue (i.e., elastin and collagen), connecting the respiratory bronchioles to the alveolar sacs.

help pls should be easy?​

Answers

What you have selected should be right
The 1st one is correct

What does alteration of generation mean?

Answers

Answer:

Alteration of generation, is the type of life cycle that occurs in those plants and algae in the Archaeplastida and the Heterokontophyta that have distinct haploid sexual and diploid asexual stages.

pls make me brainliest

function of mound layering? ​

Answers

Heavy-stemmed shrubs and trees benefit from mound layering. Cover the main stem by clipping it down to the ground. The buds at the stem's tip will develop into a number of rooted branches. Inside the moss, roots will form, and you can cut the rooted tip from the plant.

chapter 19 Complete evaluation of the placenta includes structural _____, _____, retroplacental appearance, and _______ of the cord

Answers

Answer:

Structural location, size, shape and consistency, retro placental appearance and umbilical cord.

Explanation:

Umbilical cord is covered by amniotic membrane. Complete evaluation of placenta includes observing its size, shape, location and consistency. The area between myometrium and placenta is retro placental.

Which of the following is NOT part of the circulatory system?
lungs
heart
arteries
blood​

Answers

I’m not 100% sure about this one but I believe that it is lungs, seeing that the rest is blood you can just like pick the most obvious one out
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