Biology High School

1 point
14. A scientist is using potassium-40, which is a radioactive isotope of
potassium, to discover the absolute age of a fossil by radiometric dating.
The scientist determines that about three-fourths of the original
potassium-40 atoms in the fossil now remain in the fossil. What additional
information is necessary for the scientist to determine the absolute age of
the fossil? *
the half-life of potassium-40
O O
the identity of an index fossil
the atomic mass of potassium-40
the total mass of the fossil

Answers

Answer 1

I want 10 point lol the answer is 40

Answer 2

Answer: c. the ratio of the mass of potassium-40 to stable potassium isotopes

Explanation:

1 Point14. A Scientist Is Using Potassium-40, Which Is A Radioactive Isotope Ofpotassium, To Discover

Related Questions

Which of the following occurs during prophase?

A) The DNA condenses and the nuclear membrane breaks

B) The chromosomes line up in the center of the cell.

C) The sister chromatids separate

Answers

B my good sir thank you!

The statement "The DNA condenses and the nuclear membrane breaks" occurs during prophase.

What is prophase?

In the beginning stage of mitosis and meiosis known as prophase there are different level of activity. This is when the DNA becomes more condensed the protective nuclear membrane. The mitotic spindle starts to form.

In prophase the DNA undergoes condensation, while simultaneously the nuclear membrane disintegrates. This enables the formation of the spindle. Allows for the movement of chromosomes, within the cell.

learn about prophase here https://brainly.com/question/12828200

#SPJ6

please answer this biology question!

Answers

5- A

Hope this helps

Explain

10. Which of the following provide most of the energy in ecosystems?
a. keystone species
b. carnivores
c. generalists
d. producers

Answers

Generalists is the answer

Answer:

Explanation:

Can someone help me with these? (The circle the correct option parts)

Answers

The correct answer is C!

The dlagram showsa model of how bacteria reproduce by
cell division.
Which two statements explain what this model shows?
A. It shows asexual reproduction.
D B. It shows offspring that have the same genes as the parent.
C. It shows sexual reproduction.
O D. It shows how genetic variation develops in offspring.

Answers

This is asexual reproduction and it shows offspring that have the same genes as the parent, since the genetic material was copied before the division.

Answer:

A & B

Explanation:

A-P-E-X

What is the space called in a cell that holds water

Answers

central vacuole

bhubyigty

Answer:

Central vacuole.

Explanation:

A central vacuole is an organelle that is full of water. This vacuole is bounded by a single membrane and functions as a combination of reservoir, waste dump, storage region, and keeps the cell in shape.

What does the presence of new rock near an oceanic ridge indicate?

A. There is always a deep-sea trench underneath.
B. There is evidence of seafloor spreading.
C. They are made from oceanic crust.
D. They have iron oriented in different directions.

Answers

Answer:

Explanation:

Answer:

Explanation:

b makes the most sense to me

why doesn't Venus have a moon

Answers

Answer:

Nobody shall ever know -.-

Explanation:

Answer:

It does not -_-

Explanation:

Venus does not have any moons. This is because any moon orbiting Venus would be in an unstable orbit and would most likely be swallowed by the mammoth gravitational pull of the sun. Whenever we look up at the night sky, we see a greyish white object hung among thousands of other visible stars.

What are 3 differences between light dependent and light independent reactions

Answers

Answer:

In the light-dependent reactions, energy from sunlight is absorbed by chlorophyll and that energy is converted into stored chemical energy. In the light-independent reactions, the chemical energy harvested during the light-dependent reactions drives the assembly of sugar molecules from carbon dioxide.

Explanation:

A flower species releases a strong odor that protects the flower by keeping predators away. The odor also prevents pollinators from visiting the flower. The flower is able to survive, but cannot reproduce. What is the relative fitness of this flower?

A. 50%
B.100%
C.75%
D.0%

Answers

Answer:A

Explanation:Because its a guess!

what are parts of a flower?

Answers

Stamen, petal, sepal, pistil, stigma, ovary, and carpel

Answer:

That is the part of the flower.

What is the total mass of organic molecules in 100g of chicken?

Answers

JDBXHSUDDHDYYSISHXGVSBDKXIDHD

Which three of the following choices are examples of commons ?
O A. Clean air
B. Personal computers
C. The night sky
DD. A neighbor's swimming pool
E. State parks

Answers

Answer:

A, C, and E

Explanation:

A P E X

Commons are the term used to refer to scarce resources such as air, water, and sky that with tangible benefits can be used by all but cannot be claimed by anyone.

Examples of commons are clean air, night sky, and state parks.

The examples of common include:

Sky, State Parks, and Clean Air are examples of commons. These are the resources available to the populace and cannot be owned by any organization or agencies, or any individual.

Personal computers and a neighbor's swimming pool are not examples of commons as the computers are owned by an individual or an organization, whereas the neighbor's pool is also a private property that cannot be accessed by others.

Thus, the correct answers are clean air, night sky, and state parks.

To know more about commons, refer to the following link:

https://brainly.com/question/547437

Brown hair is dominant over light colored hair. Cross two light haired people.

Answers

Answer:

I’m not sure what your looking for but there’s the punnet square

Explanation:

Someone please help me this test is time I need an answer and I’m very confused plz help

Answers

Whoever made this test is retarted. I feel sorry for you. :(

Organisms are made of parts that work together to form a living system. The smallest functional unit of life in an organism is known
as
OA a cel
ОВ.
an organ system
OC
a tissue

Answers

Answer:

A. a cell

Explanation:

Cells are the building blocks of life, or, the smallest unit of life. Cells join to make tissues, and tissues join to make muscles, and muscles join to make an organ system. This means that it can't be either of the other two options.

Hope it helps and have a great day! :)

describe the effects that enzymes can have on substrates

Answers

When an enzyme binds its substrate, it forms an enzyme-substrate complex. This complex lowers the activation energy of the reaction and promotes its rapid progression by providing certain ions or chemical groups that actually form covalent bonds with molecules as a necessary step of the reaction process.

Enzymes bind with chemical reactants called substrates. There may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. In some reactions, a single-reactant substrate is broken down into multiple products. ... The enzyme's active site binds to the substrate.

hope this helped!

HELP PLEASE! BRAINLIEST AND 10 points

7. The Endangered Species Act protects biodiversity by——-

a.making a list of protected animals

b.preserving habitat

c.all of these

d.prohibiting the sale of endangered species

Answers

Answer: Hold on i need to change my answer rq.

Explanation:

The Endangered Species Act is the strongest law for protecting biodiversity passed by any nation. Its purpose is to prevent the extinction of our most at-risk plants and animals, increase their numbers and effect their full recovery — and eventually their removal from the endangered list.

The diagram below represents a feedback mechanism.
Higher blood sugar
Pancreas secretes
less hormone
Pancreas secretes
more hormone
Lower blood sugar
The hormone referred to in this feedback mechanism is
1
estrogen
2.
insulin
3.
progesterone
4.
testosterone

Answers

Answer: Insulin

Explanation:

Help plis I don't understand

Answers

The answer would be Nucleus....Chromatin or the last option.

Hope this helps! (:

Why my ice taste like water? (Very disappointed with flavor)

Answers

Pfft- I don’t know honestly, might want to check that out

Answer:

it like water

Explanation:

This is for my culinary class. It’s on manners and etiquette. Any help would be appreciated (-:

5) If there are 3 forks on your place setting, which one do you use first?

9) You’re not sure how to eat a food that you have never eaten before. What should you do?

Answers

do u have snap ? there’s a group we help each other out with school

3. Why do offspring look like the parent during reproduction through mitosis?

Answers

Living things produce offspring of the same species, but in many cases offspring are not identical with each other or with their parents. Plants and animals, including humans, resemble their parents in many features because information is passed from one generation to the next.

all you need is in the photo

Answers

Answer: transpiration

Explanation:

when water leaves from trees or shrubs its called transpiration

Answer:

the answer would be runoff

Explanation:

because the water is running down the slope

What is the responsibility of DNA in the cell

Answers

Answer:

It helps make protiens and is like a blueprint for your body.

Explanation:

Answer:

The main role of DNA in the cell is the long-term storage of information.

Explanation:

It is often compared to a blueprint, since it contains the instructions to construct other components of the cell, such as proteins and RNA molecules.

Help me pls!will give brainliest

Answers

The answer is A
Using energy

Peter conducted the investigation below to find the energy contained in a peanut. If the burning peanut raised 20 g of water from 18°C to 22°C, how much energy did it contain? Use the equation E = m × c × ΔT to find your answer. Assume that c (the specific heat capacity of water) is 4181 J/kg. Give your answer to two decimal places.

Answers

Answer:

334.48

Explanation:

delta T = 4 degrees

m = 20 grams of water

c = 4.181 J / gram

E = 20 * 4.181 * 4

E = 334.48 Joules

Remember to change c to Joules / gram

4181 j / kg * 1 kg / 1000 grams = 4.181 j / gram

A red flower and a flower with red and white spots are crossed. What is the percentage of them having an all red flower

Answers

Answer:

75%

Explanation:

Since the red seems to be to dominant trait, and the white recessive, I would assume that 75% would be the answer due to using a punnet square.

If the lysosome and cell membrane were missing from the animal cell would the cell
be able to maintain homeostasis?
No, because the lysosome and the cell membrane aren't needed
Yes, becuse the lysosome and the cell membrane aren't needed
No, because the lysosome and the cell membrane are needed
Yes, because the lysosome and the cell membrane are needed

Answers

Answer: No, because the lysosome and the cell, membrane are needed.

If cells didn't have a membrane, the cell would just melt everywhere. If we didn't have lysosomes, there would be a lot of toxins in the cells.

Hope this helps :)

Which would a scientist most likely examine to locate gene mutations?

Answers

Answer:

DNA

Explanation:

Comparing with multiple of the same species, and one with an abnormal tribute or dna segment? Assuming this is a trick question

Other Questions

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