What is the age of a meteorite if potassium-40 decayed from 80 g to 10 g? The half-life of potassium-40 is 1.3 billion years.
1.3 billion years
2.6 billion years
3.9 billion years
5.2 billion years
Answers
Answer: b
Explanation: i toook the test
Answer: C.
Explanation:
Related Questions
Question 1 (1 point)
Which of the following explains how density dependent factors can
slow population growth?
There are more births in the population.
There are more deaths in the population.
There are more births and deaths in the population.
There are fewer births and deaths in the population.
Answers
5. Viruses are not cells, nor are they made of cells. They also cannot
reproduce without another living cell. Which statement about viruses
is true?
A. viruses do not have a nucleus
C. virus are made up of tissues
B. viruses are multicellular
D. viruses are made up of organs
Answers
Answer:
B
Explanation:
... I think :] it could also be D
The relatively large number of new mutations that occur in the human genome in each generation is tolerable because: ______________
a. humans have excellent protein repair mechanisms.
b. compared to other organisms, changes in human proteins have relatively small effects on their cells' structures and functions.
c. humans have excellent DNA repair mechanisms.
d. most of the human genome is noncoding DNA, so few mutations affect human proteins.
e. most of the mutations occur in somatic cells, not germ cells.
Answers
Answer:
The believe the correct answer is option E.
The relatively large number of new mutations that occur in the human genome in each generation is tolerable because: most of the human genome is noncoding DNA, so few mutations affect human proteins. Therefore, the correct option is D.
What is a human genome?A human genome refers to the complete set of sequences of the nucleic acids that are present in the humans. The human genome contains a relatively large amount of noncoding DNA, which does not code for proteins and is therefore less subject to selective pressures.
Option A, humans have excellent protein repair mechanisms, and Option C, humans have excellent DNA repair mechanisms, are partially true, but do not fully account for the tolerability of new mutations in the human genome.
Option B and E are also not true, as changes in human proteins have relatively small effects on their cells' structures and functions, is not entirely true. Therefore, the correct option is D.
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Please help will give brainly
Answers
Answer:
4 meters
Explanation:
Describe the three types of waves that emanate from and earthquake. Compare their speed, type of motion and what the types of material they will travel through (solid/ liquid) PLZ HELP ME DUE TONIGHT!!!!!!!
Answers
Answer:
The types of waves that emanate from and earthquake are the body waves (P-waves and S-waves), and the surface waves. The surface waves travel along the suface, and are are the slowest, even though they do the most damage in an earthquake. While the P-waves travel the fastest through solids, liquids, and gases. S-waves, however only travel through solids.
Hope that helped! <3
The lipid that makes up most of the lipids in our body is: Group of answer choices lecithin triglyceride phospholipid cholesterol
Answers
Answer:
triglyceride
Explanation:
the most common lipid.
an enzyme catalyses only one reaction explain why
Answers
Answer
Enzymes are proteins, which have a specific 3D tertiary structure, with a specifically shaped active site. The active site can only bind one substrate to form an enzyme-substrate complex, so can therefore only catalyse one reaction.
I really need helppppp
Answers
Cytoplasm - eukaryotic cell
Organism - unicellular
____________________________ is characterized by constant worry over minor and catastrophic events. Other complaints, such as muscle tension, fatigue, and irritability are also common.
Answers
Generalized anxiety is characterized by constant worry over minor and catastrophic events. It involves persistent concern about different issues.
Generalized Anxiety is a mental disorder associated with persistent concern about different issues.
The issues that may cause generalized anxiety may be, among others, money, family, work and health.
In addition, this mental disorder (generalized anxiety) is accompanied by a series of physical signs such as constant muscle tension and fatigue.
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Which Kingdom does not contain a cell wall?
help me pleasee
Answers
Answer:
Protista Protists
Explanation:
Protista. Protists are single-celled and usually move by cilia, flagella, or by amoeboid mechanisms. There is usually no cell wall, although some forms may have a cell wall.
The light-dependent reactions change _____ in to the molecules _____ and _____.
Answers
!!!!NEED HELP ASAP ILL GIVE BRAINLIEST AND 25 POINTS!!!!! How do proteins help transport of materials through the membrane?
Answers
Answer:
Channel proteins can aid in the facilitated diffusion of substances by forming a hydrophilic passage through the plasma membrane through which polar and charged substances can pass.
Explanation:
Answer: By forming a continuous protein pathway across the membrane, these proteins enable specific hydrophilic solutes to cross the membrane without coming into direct contact with the hydrophobic interior of the lipid bilayer. Carrier proteins and channel proteins are the two major classes of membrane transport proteins.
what do the letters in the acronym pmat stand for?
Answers
Four phases of mitosis: prophase, metaphase, anaphase, and telophase
PMAT acronym stand for four phases of mitosis prophase, metaphase, anaphase, and telophase.
What is PMAT?PMAT has been known as an acronym that is used for a transporter protein Plasma membrane monoamine transporter as well as the four stages of the mitosis cell cycle. On the basis of the reference given in the form of an image, it is most like the four stages of mitosis are Prophase, Metaphase, Anaphase, and Telophase.
Prophase is the first stage of mitosis and followed by the metaphase, anaphase, and ends with telophase. Telophase is followed by cytokinesis. On the basis of the reference given in the form of an image, it is most like the four stages of mitosis are Prophase, Metaphase, Anaphase, and Telophase.
Therefore, PMAT acronym stand for four phases of mitosis prophase, metaphase, anaphase, and telophase.
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a student is investigating cellular transport. what will most likely occur when the student places a cell that is 95% water inside of a solution that is 100% water?
Answers
Cellular transport refers to the flow of substances into or out of the cell across the cell membrane.
When the student places a cell that is 95% water inside of a solution that is 100% water, the cell will achieve net movement and if water continues to enter, it swells up and burst.
When a cell is placed in a hypotonic solution, water flows into the cells and the cell gains volume until it achieves equilibrium. But if water continues to flow in afterwards, it swells up and burst.Learn more about cellular transport: https://brainly.com/question/6949569
I’m confused with this question
Can anyone help?
Answers
I get why u were confused cause the way they word some of the answers literally doesn't make any mf sense
my best answer would be the 3rd one (sediment that is sorted by size due to the changing velocity of the water)
Explanation:
because when sediments are well sorted their sizes are similar
When you sit in a chair, it exerts_____
against you.
Answers
Answer:
When you sit in your chair, your body exerts a downward force on the chair and the chair exerts an upward force on your body. There are two forces resulting from this interaction - a force on the chair and a force on your body.
Explanation:
Compare the four types of cells animal, plant, protest, bacteria, what structures do they have in common
Answers
Answer:
They all have cytoplasm and cell membrane
That's all that I could find
Define photosynthesis?
Answers
Answer:
PROCESS BY WHICH PLANTS MAKE THEIR OWN FOOD WITH THE HELP OF WATER, MINERAL , CHLOROPHYLL CARBON DIOXIDE IN THE PRESENCE OF SUNLIGHT IS CALLED PHOTOSYNTHESIS.I HOPE IT IS HELPFULName 3 things that come from decayed plants, are fossil fuels, and release carbon dioxide when they are burned.
Answers
Answer:
carbon cycle, neutral, and decomposition
Most of the aerobic respiration of a cell takes place in which structure?
A chloroplast
B lysosome
C vacuole
D mitochondria
Answers
ill give brainlietst and 50 points
Drag each tile to the correct location on the chart.
Determine whether each statement describes mitosis, meiosis, or both mitosis and meiosis.
Answers
Answer:
DNA replicates in both mitosis and meiosis, Mitosis occurs during growth and development, In meiosis the number of chromosomes reduce by half, Mitosis occurs in all organisms, Meiosis occurs in organisms that sexually reproduce, and chromosomes stay the same in Mitosis.
Explanation:
Mitosis: Occurs during growth and development, Occurs in all organisms, and The number of chromosomes remains the same
Meosis: The number of chromosomes reduces by half, and Occurs in organisms that sexually reproduce
Both: The DNA is replicated.
1. The DNA is replicated: Both Mitosis and Meiosis. In both processes, DNA replication occurs before the division of cells, ensuring that each daughter cell receives a complete set of genetic information.
2. Occurs during growth and development: Mitosis is the process responsible for the growth, repair, and development of multicellular organisms by producing identical daughter cells.
3. The number of chromosomes reduces by half: Meiosis involves two divisions that result in the reduction of chromosome number by half, leading to the formation of gametes (sperm and egg cells) with half the usual number of chromosomes.
4. Occurs in all organisms: Mitosis is a fundamental process occurring in various organisms, ranging from unicellular to multicellular, for growth, tissue maintenance, and asexual reproduction.
5. The number of chromosomes remains the same: In mitosis, the daughter cells have the same number of chromosomes as the parent cell, maintaining the chromosome count.
6. Occurs in organisms that sexually reproduce: Meiosis is specific to organisms that reproduce sexually, as it produces genetically diverse gametes that contribute to the variability of offspring.
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Diagram and label a chromosome in prophase
Answers
1. The desire for a male child.
2. Lack of awareness about birth control measures.
iii) 1. The pituitary gland secretes hormones that regulate all other endocrine glands so it is called the master gland.
2. Gametes are produced by meiosis in which the number of chromosomes gets reduced to half. So they are haploid. During fertilisation, the zygote has a diploid number of chromosomes.
Epinephrine mediates the fight-or-flight response of the body. One of the effects is to increase the amount of glucose available to muscles. What does the signaling pathway triggered by epinephrine cause to occur in liver cells
Answers
Answer:
In liver and muscle cells, epinephrine stimulates the release of glucose from glycogen by inhibiting glycogen synthesis and stimulating glycogen breakdown.
Explanation:
My aunt works in the medical field, so I asked her. Hope this helps whoever needs it.
How do gravity work?
Answers
Answer:
Gravity makes the Earth constantly pull us down. ... The force of gravity depends on the mass (weight) of each object. The force with which two objects attract each other is proportional to their mass and decreases rapidly the moment we separate them.
Explanation:
hi i'm mexican long live mexico
Answer:
the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body.
Explanation:
Which reactanat makes cellular respiration more efficient than fermentation when making ATP?
a
Oxygen
b
Glucose
c
Water
d
Carbon Dioxide
Answers
Answer: glucose I think?
Explanation: I’m not sure but it should be more efficient.
What are three organs that could be part of a mollusk respiratory system?
Answers
2. Mantle cavity
3. Pulmonary sac
I ACCIDENTLEY SCREAMED PRETTY GAY
Answers
Answer:
.
Explanation:
Answer:hahahahah really why thats so funny
Explanation:
what would happen if cells with mutated dna replicated
Answers
Answer: Incorrectly paired nucleotides that still remain following mismatch repair become permanent mutations after the next cell division.
Explanation: If they replicated than the entire thing would copy that and would be permanent.
if you have been to a beach for a whole day, then you have seen tides roll in and out. What causes
Earth's high tides?
Answers
Answer:
The Moon
Explanation:
High tides and low tides are caused by the moon. The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides.
Answer:
it's caused by the gravitational forces from the moon.
Explanation:
grew up at the beach
hope this helps
people who have come back from being legally declared dead. what was your experience
Answers
my friend told me that one his friend uncles was in a car crash not in a bad one but it did send his uncle flying it hit his head and there was alot of blood people thought he was dead but after like a few hours in the doctor he just opened his eyes but still couldnt move