After an organism dies, it stops taking in radioactive carbon-14 from the environment. If the carbon-14:carbon-12 ratio ( / ) in a piece of petrified wood is one sixteenth of the ratio in living matter, how old is the rock

Answers

Answer 1

Answer:

Age of rock= 22920 years

Explanation:

Carbon-12 isotope is a stable isotope whereas carbon-14 isotope undergoes radioactive decay. The half-life of carbon-14 isotope = 5730 years

Since the ratio of carbon-14 to carbon-12 = 1/16 : 1; number of times carbon-14 isotope decayed n

(1/2)ⁿ = 1/16

(1/2)ⁿ = (1/2)⁴

n = 4 times

time(age) for decay = n * half-life

Therefore, age of fossil = 4 * 5730 years

Age of rock = 22920 years


Related Questions





Dating the fossil at the site it was found, without benefit of laboratory equipment, would BEST be described as
A) carbon dating.
B) imprint dating.
C) relative dating.
D) half-life dating.

Answers

Answer:

Answer c) Relative Dating.

saturn and Uranus are alike in that they ​

Answers

Answer:

The correct answer is they both have rings around them

Explanation:

Saturn and Uranus are both planets in our solar system; indeed Saturn is the sixth planet while Uranus is the seventh planet. Besides this, Saturn and Uranus are giant planets, this means they are composed of gas or similar materials and they are massive. Moreover, as giant planets these two planets have a ring system, which means around them, there are dust and other particles that orbit the planet and form rings; although, in the case of Saturn these are massive and more visible. According to this, Saturn and Uranus are alike because they both have rings around them.

Answer:

They both have rings around them.

Explanation:

The only 4 planets in our solar system that are gas giants have rings.

ASAP Which level of organization is directly below organ system
A:organelle
B:Cell
C:Tissue
D:organ

Answers

and you think i would know?

Answer:

Here since the person above wants to be 3 years old, lemme try to help you, the answer will be D. Organ

Explanation:

The elements carbon, hydrogen, oxygen, and nitrogen make up which percentage of the
human body?
O 50%
O 69%
78%
O 96%
Question 6
4 pts

Answers

96%. Hopefully this helps

A red blood cell is placed in a salty solution. When it shrivets due to loss of water, we say it has

•become turgid

•plasmolyzed

•lysed

•crenated

Answers

Answer:

It's crenated ( I asked Google btw)

Become turgid.
This will be the answer according to me.

Plz ASAP What is the male sex cell that results from meiosis?
zygote
sperm
egg
bacteria

Answers

Answer:

sperm

Explanation:

Answer:

b. sperm

Explanation: it is what fertilizes the egg (female meiosis cell) to create a zygote.

E2020

(ANSWER NEED RIGHT AWAY!! PLS) A classmate claims that an apple and cupcake, both about the same size, give you the same amount of energy. Do you agree or disagree with this
statement? Explain.

Answers

Answer:

No, just because something is the same size doesn't mean it will have the same amount of energy. One thing can have more positive electrons and make it have more energy than the other.

4. The top part A of the flask-shaped reproductive organ X in the flower of a plant secretes a surgery substance
into its lower part B which goes towards the bottom part of the flask-shaped organ. When a tiny grain D
coming from the top part E of another reproductive organ Y in the flower falls on part A, it grows a long
tube F through the organ X in response to the sugary substance and reaches the bottom part C of flask-
shaped organ to carry out fertilisation.
(a) What is (i) organ X, and (ii) organ Y, inside the flower ?
(b) Name parts (1) A (ii) B, and (iii) C, of flask-shaped organ.
(c) Name (i) grain D, and (ii) part E of organ Y.
(d) Name the tube F.
(e) What is the phenomenon of growing a long tube in response to a sugary substance in the process of
fertilisation in a flower known as ?​

Answers

Answer:

X- pistil

Y- stamen

A-stigma

B-style

C-ovary

D- pollen grain

E- anther

F- pollen tube

Chrysanthemum pests and diseases include leaf miners, _____, powdery mildew and leaf spot

Answers

Answer:

aphids

Explanation:

it just is trust me

Besides plants and insects, what else would the student need in the ecosystem? Why?

Answers

Air, water , because without air we can’t live and without water too because our bodies need air and water

If bacteria do not contain a nucleus will bacteria still have DNA?

Answers

Of course not the DNA is found in two basic forms: a chromosomal loop and ring-like plasmids. The chromosomal loop is literally a looping string of DNA. Since there is no true nucleus in a prokaryotic cell, the DNA is suspended in cytoplasm, or the fluid filling the cell.

No it wouldn’t.

Since there is no true nucleus in bacteria or prokaryotic cells, the DNA is suspended in cytoplasm or the fluid that’s filling the cell up

Which of these are NOT found in plant cells?
a)cell membranes

b)centrioles

c)mitochondria

d)cell walls

Answers

Answer:

B. centrioles

Explanation:

Plant cells have cell walls, cell membranes and also contain mitochondria along the chloroplasts.

b) centrioles

hope this helped ;)

Prompt
What is the difference between a niche and a habitat?

Answers

the role a species plays in the ecosystem is called its niche. A habitat is the physical environment in which a species lives.

A local ecosystem includes a variety of grasses that grow on spongy soil. In spring, heavy rainfall and melted snow cover the soil in a few inches
of water. The ecosystem dries up by late summer. What term BEST describes this ecosystem?
A. pond
B. estuary
C. wetland
D. stream bed

Answers

Answer:

The correct answer is C. Wetland.

Explanation:

A wetland is a generic name for habitats located between hard ground and open water. Wetlands include, for example, wet and waterlogged shallow land, shallow lakes and seas, marshes, floodplain forests, and flowing waters.

Wetlands provide a breeding ground for many animal and plant species and can act as a buffer in flood areas and prevent severe and sudden floods. Rainfall, waters entering the catchment area, soil and ground elevation differences in the area, and water evaporation form the hydrological conditions of the wetlands. Wetlands are one of the most valuable and endangered habitats on Earth. Swamps, overgrown lakes, flood-prone areas, shallow bays, water-covered beach areas and mangrove beaches are all endangered habitats.

In the food web below what organisms does organism A eat

Answers

Answer:

hop this hepl

Explanation:

Match each terms with their definitions

Answers

well we need the picture of each term with the provided definitions
Provide a photo for help

Does a parrot eat a grasshopper?

Answers

, A green Parrot eats insects and it will also eat a grasshopper . Green Parrot is Omnivorous in Nature.

I hope this helped

I will mark brainlisest just please HELPPPPPPP

Answers

The answer is C. Photosynthesis is the process of using sunlight+carbon dioxide+water to make food for the plant.

plz help it is due soon

Answers

Answer:

I think it's a) 0.3 km/min

Answer:

all you need to do is divide 20 by 6 and to give you a free pass the answer is 3 :) or 0.3

Explanation:

is kissingg the homies gae

Answers

Answer:

no

Explanation:

only if y’all have socks on

It’s been scientifically proven.

Which statement is false?
O Polypeptides are made of amino acids.
O Lipids are made of fatty acids.
O Simple sugars are made of polysaccharides.
O Nucleic acids are made of nucleotides.

Answers

It’s C

Simple sugars (glucose) are made up of monosaccharides while polysaccharides are made up of simple sugars but different types of sugars such as of cellulose and starch.

What are the roles of different organelles in a cell?

Answers

Answer:

Functions of different cell organelles:

Nucleus: contains all the genetic material, acts as information center and tells all the organelles what to do, RNA transcription.

Mitochondria: generates energy through respiration

Endoplasmic recticulum (rough): transport and storage of material; (smooth ER): creation of lipids and fats

Ribosome: protein creation by RNA translation  

Golgi apparatus: responsible for synthesis, packing and processing of proteins

Chloroplast: responsible for glucose creation (by photosynthesis)

Cytoplasm: is region where all chemical reactions take place  and is the jelly like fluid that holds all the organelles in place inside of the cell

lysosome: responsible for breakdown of larger molecules

Flagellum (or flagella): tail like organelle, assists motion

Vacuole: helps in maintenance of homeostasis  and stores waste products or other materials like water / food

cell membrane: separates cell from the rest of the environment  and controls what comes in and out of the cell

cytoskeleton: supports cell structure

There are a number of other organelles as well but i just named some of the common ones.

Answer:

the cell sturcture

Explanation:

Sometimes after an intense exercise routine, an individual will have sore muscles 1 to 2 days following the exercise; this is called delayed onset muscle soreness. Although not completely understood, it is believed that one cause of this is damage that occurs to the Z disks and contractile filaments in the muscles. When the body attempts to repair this damage, an inflammatory response occurs that causes soreness a couple of days after the exercise has taken place. Which of these situations would likely lead to less delayed onset muscle soreness in an individual?

a. a mutation in the Z-disk protein that caused the attachment of the Z disk to the titin protein to be stronger
b. a mutation that would reduce the amount of lactic acid buildup in muscle tissue
c. a mutation in the Z-disk protein that caused the attachment of the Z disk to the titin protein to be weaker
d. a mutation that weakens the calcium binding ability of troponin

Answers

Answer:

The correct answer is option A. a mutation in the Z-disk protein that caused the attachment of the Z disk to the titin protein to be stronger

Explanation:

As delayed onset muscle soreness is thought to be led by the inflammatory response of the body in order to repair damage to the Z disks and contractile filaments in muscles, due to the intense exercise.

Mutation in the Z-disk protein would strengthen the connection between Z disks and contractile filaments as it is logical that this mutation could withstand more pressure or intense exercise before damage occurs to these tissues.

Hormones are proteins that regulate many functions in the body, such as growth and cell differentiation. Which of the following does NOT describe a function of proteins in living organisms?

Answers

Answer Options:

Proteins store energy long term, provide lubrication, and insulate the body Proteins in the form of enzymes catalyze chemical reactions Proteins provide structures in the body, such as hair and muscles Proteins in the cell membrane help transport substances into and out of cells

Answer:

Proteins store energy long term, provide lubrication, and insulate the body

Explanation:

Proteins store energy long term, provide lubrication, and insulate the body  - this is false, this describes the role of fats. Proteins in the form of enzymes catalyze chemical reactions  - this is true, enzymes are an important class of proteins in the bodyProteins provide structures in the body, such as hair and muscles  - this is true, for example our hair is made of a protein called keratin Proteins in the cell membrane help transport substances into and out of cells  - this is true, proteins form important pumps and channels in the cell membrane

which of the following are Vertebrates?
Worms

Answers

Answer:

a vertebrate is an animal with spinal cord surrounded by cartilage or bone

Explanation:

fishes,whales,sharks

amphibians

reptiles

birds

mammals

- Making more cells is needed for growth, development, and _______
repair.

Answers

Answer:

cell

Explanation:

To kill a fungus, you could use a fungi-_______

Answers

Answer:

antivirus

Explanation:

To kill a fungus, you could use a fungi-antivirus

Look at your model and think about the relationship between oxygen and carbon dioxide in the sealed jar. Which of these statements is true?

Plants release only carbon dioxide during photosynthesis.

Plants use oxygen during photosynthesis.

Plants and animals use oxygen during respiration.

Plants and animals release oxygen during respiration.

Answers

Answer:

Plants use oxygen during photosynthsis.

Explanation:

Oxygen and carbon dioxide in the sealed jar relationship between oxygen and carbon dioxide is that  Plants and animals use oxygen in respiration, hence option c is correct.

What is respiration?

Water and carbon dioxide are converted into oxygen and glucose in photosynthesis and plant uses glucose and releases oxygen as a byproduct.

Oxygen and glucose are converted to water and carbon dioxide in cellular respiration. By-products of the process include carbon dioxide, water, and ATP, which are turned into energy.

Carbon is taken out of the atmosphere by photosynthesis and put back in by cellular respiration.

Therefore oxygen and carbon dioxide have a relationship in respiration, hence option c is correct.

Learn more about respiration, here:

https://brainly.com/question/28933453

#SPJ3

What is meant by the concept of development?

Answers

Answer:

A process that creates growth, progress, positive change or the addition of physical, economic, environmental, social and demographic components.

pleasseeee help...........

Answers

Answer:  

The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet. It was proposed by Alfred Wegener.

Explanation:

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