Scientists have found that the carbon-14 content of an unknown prehistoric sample was reduced to one-half. What best describes the identity of the sample?

Answers

Answer 1
a rock formed 10,000 years ago
Answer 2

Answer:

B

Explanation:

A rock that formed more than 10,000 years ago


Related Questions

which type of selection leads to increased phenotypic and genetic variation

Answers

disruptive selection

The answer is B. Disruptive selection

Good luck!

-RxL

A fox with thick fur would have a survival advantage over other foxes

Answers

the fox has more so he can keep more heat in but in the summer he will get overheated. hunting with big fur is hard and other ones would have an advatange
If it was cold weather and the other foxes didn't have as much fur then possibly their is a half half because the other wolfs could have food and no fur and the wolf with fur could only have fur and no food.

what groups of objects do you classify based on their observable characteristics

Answers

Use google so that we’ll find your awesome answer

is water found only in one state

Answers

No it is found in many states
No water can be a solid, liquid, or gas

How might abundant amounts of food allow herons to reproduce more often?

Answers

As more food equals more energy, the life rate for herons will increase, leaving more herons to live until mating time.

Hope this helps!

the life rate for herons will increase, therefore leaving more herons to live until mating seasons

Can someone describe how air moves and changes in convection currents in the atmosphere?

Answers

i took this when i was in 8th grade so i will try my best to tell you 
air moves all the time and everywhere. it moves by us breathing the air in our lungs. trees provide us by air.

George is interested in insects and wants to do an experiment. Which of the following is a scientific question about insects that he could investigate with an experiment?

 A. Do ants feel anxiety?

 B. Why are there so many different kinds of insects in the world?

 C. Are ladybugs prettier than beetles?

 D. Do different food types affect the growth rate of beetles? 


Answers

Answer: D. Do different food types affect the growth rate of beetles?

Explanation:

A scientific question can be define as the question that can be answered using the scientific methodology. The scientific methodology is based on the series of steps like making observation based on the question, composing the hypothesis, testing the hypothesis by using the experimentation process, concluding the results.

D is the correct option. This is because of the fact that growth rate of the beetles can be examined on the basis of different food types.

Nitrogen is one of the important elements for life. Nitrogen is present in DNA and proteins. It’s also a component of       water   chlorophyll   air   in plants, a pigment that’s critical for photosynthesis. Although nitrogen is present in the air, it can’t be consumed directly. It’s converted into usable form by       bacteria   animals   plants  .

NextReset


Answers

Answer:

Nitrogen is one of the important elements for life. Nitrogen is present in DNA and proteins. It’s also a component of (water, chlorophyll, air) in plants, a pigment that’s critical for photosynthesis. Although nitrogen is present in the air, it can’t be consumed directly. It’s converted into usable form by     (bacteria, animals, plants).

1. chlorophyll

2. bacteria

Explanation:

the life span of a multicellular organism is?

Answers

Multi cellular organisms have larger and more effective therefore have a very long life span instead of a uni cellar organisms

Multicellular organisms have many cells that are grouped into different levels of organization. They are larger in size, more efficient and live longer than unicellular organisms.

What are Multicellular organisms?

A multicellular organism is an organism that consists of more than one cell. A multicellular organism is composed of many cells that are integrated and independent to varying degrees.

Multicellular organisms evolved together

1. By cellular specialization

2. By division of labor

3. Cells become efficient at a process

4. To become dependent on other cells for the necessities of life.

Humans, animals, plants and fungi are multicellular organisms that are very large in size and very complex and intricate in their structure as well as structure.

Thus, Multicellular organisms have many cells that are grouped into different levels of organization. They are larger in size, more efficient and live longer than unicellular organisms.

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Average Temperature of Layers
Unknown Layer Average Temperature
(°C)
A 4,500
B 1,300 to 2,500
C 5,000
D 0 to 1,300


Which layer is most likely the mantle?
Layer A
Layer B
Layer C
Layer D

Answers

the answer to this would be layer D because temperatures in the mantle range from 500-900 degrees celsius

layer d is de awnswer my guy

Which do animal cells need in order to maintain homeostasis

A: light energy
B: carbon dioxide
C: chemical energy
D: carbon monoxide

Answers

some are behavioural changes
panting
shade seeking behaviour- to reduce radiation exposure
migration- to move to more suitable climates
curling up- reduce surface area to volume ratio

others include structual changes (you can not change this)

large size- for low surface to volume ratio
round shape/short extensions- low surface to area volume ratio

then you have physiological changes this is done by either the hormone (endocrine) system or nervous system

vasioconstriction- reduce blood flow to extemeties
shivering- increase metabolic heat produced


as you can see these adaptions are used to create a negative feedback.What this means is it is the oposite to the stimulas. For example if you get cold(stimulas) you may shiver which creates heat and warms your body( the opposite effect of being cold and thus the reverse to the stimulas)

note there is some that create positive feedback as well.


hope this helps

Skin is sometimes referred to as the largest organ in the body. Why is skin considered to be an organ and not a tissue or some other structure?

Answers

Skin consists of multiple tissue types that cooperate to perform a specific task.

How do we detect life on exoplanets?

Answers

We use radar to detect signal waves from outer space

We send probes and other space technology to go scout out the area and take pictures for us to view to see if we can find any life

hope this helps

What are the four functions of the digestive system?

Answers

To achieve the goal of providing energy and nutrients to the body, six major functions take place in the digestive system:Ingestion.Secretion.Mixing and movement.Digestion.Absorption.Excretion. i gave you six bro 

The digestive system involves all organs responsible for digestion. The four functions of the digestive system are digestion, absorption, excretion and assimilation.

What is digestion?

Digestion is the breakdown of complex food materials into their simplest form, which is done by digestive system.

The main functions of digestive system are:

Digestion: breakdown of food.Absorption: The absorption of simple food into blood.Assimilation: movement of digested food molecules into the cells and are used. Excretion: the elimination of waste materials.

Thus, these are the four functions of digestive system.

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Plant and animal cells, while both eukaryotic, each have distinguishing characteristics. For example, plant cells contain chloroplasts, while animal cells do not. Which statement BEST elaborates on the reason for this difference?

A) Chloroplasts are needed for plant cells to rid themselves of waste. Animal cells do not produce any waste.
B) Chloroplasts help plants make their own food by converting light energy. Animals do not make their own food.
C) An animal cell has a cell wall, while a plant cell does not. Instead, chloroplasts line the outside of plant cells.
D) The DNA in an animal cell is housed in a nucleus, but plant cells do not contain nuclei; it is stored in chloroplasts.

Answers

Your answer would be B)Chloroplasts help plants make their own food by converting light energy. Animals do not make their own food.

The right option is; B) Chloroplasts help plants make their own food by converting light energy. Animals do not make their own food.

Plant and animal cells are eukaryotic cells (cells that have a definite nucleus and membrane bound organelles). The two cells are similar structurally, and functionally, but a few significant differences exist in each of them. Plant cells have chloroplasts (organelles that contain chlorophyll which absorbs sunlight) it uses to produce its food though photosynthesis. Animal cells do not have chloroplast. It uses mitochondria (an organelle that produces energy through respiration) to produce most of the cells energy from food. Mitochondria is also present in plants cells but it does not have the same function in plant cells.

Draw the structure of the peptide dtlh, showing the backbone and side-chain atoms, at its isoelectric point

Answers

The structure of a peptide dtlh is everything.

Which combination of factors would stop cell function?

Answers

What are your options??

Can u send a picture of your choices?

If scientists were able to stop the tectonic plates from moving, people on Earth would no longer have

Answers

Either continents, earthquakes, or magma. Im not very sure.
There would no longer be earthquakes or seafloor spreading.

PLEASE help asap!!!! Please

Which description of tectonic plates are true?


A) number in the hundreds

B) move very slowly

C) move over the layer of Earth's mantle

D) can crush together to create mountains

Answers

I believe the answer would be D because when they collide they move the Earth
It would either be B: because they do move really slowly or D: because they can create mountains when they crush together. But creating mountains, in my opinion, is not a description. It's something that can occur, but it's not describing tectonic plates. So I would go with B.

What is the name of the pores, or holes, on the outer layer of the sponge that take water in?

Answers

The pores on the outer layer of the sponge which takes is water are called POROCYTES.
Sponges are groups of very simple animals which usually grow at a spot, that is, they lack the ability to move from one place to another. There are about 10,000 species of sponges; most sponges live in salt water while some live in fresh water. The body surface of sponges are made up of holes through which water enter into their cells.
Answer:                       OSTIAI hope I helped!                      

which of the following characteristics of the Arctic rabbit is specifically an adaptation to living in the tundra

A. small size

B. keen eyesight

C. strong legs

D. White Fur

Sorry if this is easy for you guys but I sometimes forget the answer

Answers

the correct answer is d

white fur s the answer

The Aleutian Trench is an area where the oceanic Pacific Plate is converging with the continental North American Plate. What can you conclude is happening in this area?

Answers

Final answer:

In the Aleutian Trench, subduction of the Pacific Plate beneath the North American Plate causes frequent earthquakes and volcanic activity, and is part of the seismically active Ring of Fire.

Explanation:

The Aleutian Trench is a region where the oceanic Pacific Plate is converging with the continental North American Plate. In this area, a process called subduction is occurring, where the denser oceanic plate is sliding beneath the less dense continental plate. This subduction leads to frequent earthquake and volcanic activity due to the melting of the subducted plate that forms magma, which can then rise to the surface to create volcanic cones. Additionally, the subduction zone in the Aleutian Trench area is part of a larger zone known as the Ring of Fire, characterized by high seismic activity and numerous volcanoes encircling the Pacific Ocean.

Explain why the size of your muscles is the is partly an acquired trait and partly dependent on DNA

Answers

Your DNA determines how many muscle fibers a person is born with. This number never changes cause one can't make more muscle fibers during their lifetime. With more muscle fibers, one has the potential to be stronger.
It is an acquired trait because you could train your muscles to become bigger. When you train, for example resistance training, your muscle produces more myofilaments which increases their diameter. This is why you develop large muscles when you train.

Hope this helped!

Answer:

The size of the muscle is partly dependent on the DNA and exercise.

This is because DNA traits is actually responsible for how a muscle formed in the body. This trait is usually gotten from the parents of the offspring.

In the same vein, exercises can also be responsible for the size of an individual’s muscle. Exercises help in the expansion and building of muscle tissues which makes it bigger.

Select the forms or examples of solar energy:

heat energy
solar oven
rock sediments
petroleum
coal
light energy

there is more than one answer

Answers

Final answer:

The examples of solar energy are heat energy, solar oven, and light energy. Heat energy from the sun is directly used or converted into electricity by solar panels.

Explanation:

The forms or examples of solar energy from the provided list are heat energy, solar oven, and light energy. Solar energy, which includes both heat and light, can be used directly to produce thermal energy or can be converted into electricity using technologies like photovoltaic (PV) panels or solar thermal power plants. A solar oven is a device that harnesses solar energy to cook food or boil water, utilizing the heat generated by the sun's rays.

An example of heat energy being converted into another form of energy not mentioned in the text is in the case of solar panels, which convert the thermal energy from the sun into electrical energy.

What is the element's name and symbol? Is it a metal, nonmetal, or metalloid? Which family does it belong to? How many protons, neutrons, and electrons does its neutral atom have?

Answers

Krypton is non metal it is part of the noble gas family.  It has 36 protons and 48 neutrons. Its symbol is Kr. Krypton, like the other noble gases, is used in lighting and photography. Krypton was discovered in Britain in 1898 by Sir William Ramsay, a Scottish chemist, and Morris Travers, an English chemist, in residue left from evaporating nearly all components of liquid air. Neon was discovered by a similar procedure by the same workers just a few weeks later.

Why is the ability to move important to animals

Answers

so that they will be able to hunt and find places to sleep but not die

What can happen when you have taken much more than the normal amounts of vitamins?

Answers

Your body can either ignore the nutrients or reject them.

You can get sick from certain vitamins because your body wont be able to digest all of them, causing negative affects on your organs.

You can also just have nothing negative happen. For example, taking an extremely high dose of vitamin D3 would most likely not hurt you, however after a certain point you would not gain anything from it.

Answer:

Taking vitamins is a daily routine that has millions of people around the world. However, taking too many vitamins can lead to an overdose and be dangerous to health.

Explanation:

For example, water-soluble vitamins (vitamin B1, B2, B3, etc.) are excreted from the body and are not stored in the tissues. However, an overdose of some of these vitamins can induce side effects, such as irreversible nerve damage, or liver damage.

Meanwhile, fat-soluble vitamins (vitamin A, D, K, etc.) do not dissolve in water and can be stored in your body's tissues. Due to the accumulation of these vitamins, they are likely to produce toxicity or harmful effects much more than water-soluble vitamins.

Two or more organs working together form A) tissue. B) a group. C) a system. D) an organism.

Answers

i think it is c because of organs would be classified as an organ system

Organs working together will form an organ system. Therefore ,option (C) a system is correct.

What is an organ system?

An organ is a collection of tissues that work together to do its job, and an organ system is a group of organs that work together to do a certain job. There are eleven organ systems in a human body.

The respiratory system, the digestive and excretory system, the circulatory system, the urinary system, the integumentary system, the skeletal system, the muscular system, the endocrine system, the lymphatic system, the nervous system, and the reproductive systems are all considered to be part of the 11 organ systems.

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Which two structures would provide a positive identification of a plant cell under a microscope? Question 1 options: ribosomes, chloroplasts cell wall, mitochondria cell wall, chloroplast plasma membrane, large central vacuole

Answers

Chloroplasts. Animal cells don’t have chloroplasts only plants

The amount of energy transferred from the primary producer to the primary consumer is (2 points)
100%.
10%.
1%.
.1%.

Answers

10% I think because normally as the animals go higher from the producers it lowers
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