1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hoa [83]
3 years ago
5

A fossil was found and determined by radiometric dating to be 11,400 years old. what is the ratio of carbon-14 to carbon-12 in t

his fossil compared to its environment?
Biology
1 answer:
LuckyWell [14K]3 years ago
3 0

The answer would be 25%

Carbon 14 is radioactive material with 5700 year of half-time which will change it into carbon-12, a more stable substance. If the age of the fossil is 11,400 years old, then the amount of half-time passed would be: 11,400 years/ (5,700years/ half-time)= 2 half-time.

Since it undergo 2 half-time, the percentage should be: 100% * (1/2)^2= 25%

You might be interested in
Which element provides strength to the exoskeletons of clams and oysters?
Allisa [31]

Answer:

phosphorus

Explanation:

Since Phosphorus is an essential component of phospholipids, nucleic acids, phosphoproteins (casein), high energy phosphate esters (ATP), hexose phosphates, creatine phosphate, it also provides strength to the exoskeletons of clams and oysters.

7 0
2 years ago
What is the role of the centrioles in cell division?
jonny [76]
The centrioles help in the information of the spindle fibers that separate the chromosomes during cell division.
8 0
3 years ago
Write the name of the nitrogenous base that joins to each of the bases
garik1379 [7]

Answer:

Hydrogen bond

Explanation: Pretty much just a type chemical bond

8 0
3 years ago
Which ties to the Calvin cycle because it gives photosynthesis a pathway of light reactions and dark reactions.
vovangra [49]

Answer:

What is the link between the light reactions and the Calvin cycle during photosynthesis?

Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH. The Calvin cycle, which takes place in the stroma, uses energy derived from these compounds to make GA3P from CO2

3 0
3 years ago
In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. If two red-eyed heterozygous
maw [93]
So here we have two heterozygous organisms that will mate. You can put them into a Punnet square, just to be sure of your answers and to find all possible genotypes : 

      R      r
R  RR   Rr
r   Rr     rr

So you have RR, Rr and rr as your possible genotypes. 
6 0
3 years ago
Other questions:
  • Which process could cause ice to form a thin layer over a lake
    7·2 answers
  • Where in plant cells are the energy-absorbing molecules for photosynthesis located? Select one: a. thylakoids b. mitochondria c.
    13·1 answer
  • A fish fossil is found in a rock. A foot bone and tooth are found in an older layer of the same rock. What can scientists learn
    8·1 answer
  • In the ocean, communities of plants, algae, and animals are distributed according to the depth of the water and distance from sh
    13·1 answer
  • When the play begins, Tom is dressed in a merchant sailor uniform, foreshadowing _____.
    5·1 answer
  • Which of the fallowing is the most serious effect of water pollution for humans?
    5·2 answers
  • Food molecules _____ that is released when it's chemical bonds are broken
    5·1 answer
  • What basic modifications have been made in evolutionary theory since Darwin's time?
    13·1 answer
  • Which of the following describes a mutual relationship?
    10·2 answers
  • What structure does light pass through directly after leaving the condenser in a compound light microscope?.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!