You find a rock sample with radioactive atoms present. 25% of the original radioactive atoms were present, how many half lives have passed

Answers

Answer 1

Answer:

Im literally taking a test that my teacher made and i have no idea what the answer is

Explanation:


Related Questions

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How is homeostasis maintained in an ecosystem?

Answers

Answer:

Homeostasis is maintained through negative feedbacks. As changes in the environment push a system property from its equilibrium, negative feedbacks counteract the. Change in environment. Change in environment.

Homeostasis is maintained through negative feedbacks.

Hope it is useful

When the bubbling reaction stopped, the liquid was poured into another container. Did this liquid react when liver was added?

Answers

Answer:

Yes in fact it did

Explanation:

If an animal has both male and female
parts, what is it called?
A. hermaphrodite
B. autotroph
C. two species
D. parasite

Answers

Answer:

option A is correct answer hope it helps

How is the energy released by a molecule of ATP?

Answers

When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and ATP is converted to adenosine diphosphate (ADP). ... Likewise, energy is also released when a phosphate is removed from ADP to form adenosine monophosphate (AMP).

Which statement best describe a chromosome?
A. It is a single piece of DNA that contains genes.
O B. It forms the hereditary material of all life on Earth.
OʻC. It is the passing of characteristics from one generation to the next.
O D. It is the part of a chromosome that ties together two chromatids.

Answers

It’s is c :) that’s the best choices

Answer: A

Explanation: It most definetly not B, becuase not every form of life has DNA. A chromosome is a single chain of DNA that is coiled and super coiled to form dense thread-like pieces. The term chromosome is derived from the Greek words "chroma" or color and "some" or body and is so named because chromosomes have the ability to be stained with dyes.

Hello please answer this really fast all of the screen shots will be in the comments I will give 90 points to who ever answers it really fast​

Answers

Answer:

Where? Where are your questions? Attach the questions.

Answer: bro where is the question ???

Explanation:

How might an animal species be different in various habitats

Answers

Answer:

they adapted to their climate

Explanation:

Answer:

hey adapted to their climate

Explanation:

Above


DNA's shape is similar to what basic structure?

Answers

Answer:

a helix!

Explanation:

you can also call it a double helix

help please, i am confused

Answers

Answer:

a. acquired trait

b. adaptation (inherited trait)

c. adaptation (inherited trait)

d. acquired trait

Which nitrogen-containing substance is formed when amino acids are broken down?​

Answers

The answer is Urea. Hope this helps! :)

Answer:

Urea

Explanation:

Urea is produced in the liver and is a metabolite (breakdown product) of amino acids.

How did the temperature relate to the “recommended temperature limit” (solid horizontal red line)?

Will give extra points for right answer or explanation

Answers

Answer:

The “recommended temperature limit” represents limit of the temperature that is good for our world.

Explanation:

The temperature related to the “recommended temperature limit” means that in the graph there is a limit of temperature for our world's environment. if the temperature is between this limit, there is less or no adverse effect on our environment while on the hand, if the temperature exceeds from this limit, then it adversely affected our world because the emission of carbondioxide gas in the atmosphere increases due to this increase temperature..


What can form volcanoes as the two plates push apart and magma is able to rise up from the
ground and form new ocean crust?
A
convergent
B
Hot spots
C
Transform plate boundaries
D
Divergent plate boundaries

Answers

Answer:a

Explanation:

Answer: the correct answer is d

Explanation:

Which of the following is NOT consistent with the concept of natural
selection?
A. Individual organisms are able to change their genetic adaptations in
order to better survive in changing environments.
B. More offspring are produced than can survive in an environment
(overproduction of offspring).
C. There is genetic variation within populations.
D. Organisms with beneficial variations are more likely to survive and
reproduce, passing on their genes to subsequent generations.
Click to choose your answer helow:

Answers

Answer:

A. Individual organisms are able to change their genetic adaptations in

order to better survive in changing environments.

Explanation:

Natural selection can be defined as a biological process in which species of living organisms having certain traits that enable them to adapt to environmental factors such as predators, competition for food, climate change, sex mates, etc., tend to survive and reproduce, as well as passing on their genes to subsequent generations.

Simply stated, natural selection entails the survival of the fittest. Therefore, the species that are able to adapt to the environment will increase in number while the ones who can't adapt will die and go into extinction.

The statements which are consistent with the concept of natural selection includes;

I. More offspring are produced than can survive in an environment (overproduction of offspring). This ultimately implies that, the more offsprings that are reproduced by the parent organism, the more likely are they to survive.

II. There is genetic variation within populations. This simply means that tere is a better chance of having good or beneficial traits being passed from the parent organism to her offsprings.

III. Organisms with beneficial variations are more likely to survive and reproduce, as well as passing on their genes to subsequent generations.

I need help on this ASAP!! Cellular respiration and photosynthesis

Answers

Answer:

1 and 3

Explanation:

CF is an autosomal recessive disease. A carrier male is married to a carrier female. What is the chance they will have a child with cystic fibrosis?
0 percent
25 percent
50 percent
75 percent
100 percent

Answers

25 percent chance of having a child with cystic fibrosis


I have a test in a couple days and I still don’t know how to do this stuffsomeone teach mee
!(points given)!

Answers

- P P
p Pp Pp
p Pp Pp

Hom0zygous dominant: 0/4 or 0%
Heterozygous: 4/4 or 100%
Hom0zygous recessive: 0/4 or 0%

Probability of purple: 4/4 or 100%
Probability of white: 0/4 or 0%

True or False: The molecules move away from the source and travel to the end of the wave.​

Answers

Answer:

The answer is False because molecules stay is one place they may vibrate but in they stay in the same place

Which of the following is a compressional/longitudinal wave?
А
water
B
fans doing the "wave" in a football stadium
С
light
D
sound

Answers

Answer:

D. Sound

Explanation:

Both А. water and B. fans doing the "wave" in a football stadium are both literal waves and are not examples of a compressional/longitudinal

Answer:

the answer is sound

Explanation:

a sound wave in longitudinal

what is needed for dna replication

Answers

Answer:

enzymes

ATP energy

nucleotides

Explanation:

All of the above are needed. Nucleotides are the basic building blocks of new DNA, ATP energy is needed because replication is an active process, and enzymes catalyze the reactions needed to carry it out (e.g. helicase to separate the strands to be replicated, DNA polymerase to build the new strands, and ligase to "glue" the fragments together).

The picture represents muscle tissue.

Which type of muscle tissue is pictured?

Answers

Answer:

Smooth muscles

Explanation:

How are the equations for photosynthesis and cellular respiration related

Answers

HOPE THIS HELPS! :)

Notice that the equation for cellular respiration is the direct opposite of photosynthesis: Cellular Respiration: C 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O. Photosynthesis: 6CO 2 + 6H 2 O → C 6 H 12 O 6 + 6O.

PLEASE I NEED HELP WILL MARK THE BEST AND LOTS OF POINTS!!!

Answers

Answer:

A-Carrier Protein

B-Outside of the cell

Z-Glucose

Y-oxygen

X-Water inside the cell

Explanation:

What are the 5 main functions of soil? List and describe each

Answers

Soil covers the surface of the Earth and is a valuable ecosystem. Soil is made up of minerals, nutrients, water, air, organic matter and microorganisms. Because of its makeup, soil has a variety of uses in a variety of industries.

Agriculture

Soil has vital nutrients for plants. As a result, it is used in agriculture to nourish plants. The roots of a plant receive nutrients from the soil to help it grow. The North Carolina Department of Agriculture and Consumer Services notes that 13 essential plant nutrients come from the soil.

Building

Soil is an important part of the building process. Soil compaction, which increases the density of the soil, is done as part of the building process. The purpose of the compaction is to improve the load support. If not done, structural failure can result. Soil can also be used as building materials such as adobe and red bricks.

Pottery

Clay soil is used in making ceramics, or pottery. When water is added to clay soil, it can be used to create the ceramics. Once formed, you can leave it to dry and it will retain its shape. Any type of ceramic can be created with the clay soil, such as a vase, bowl, cup or sculpture.

Medicine

Soil is commonly used in antibiotics. Microbes created in the soil are harmful to bacteria, which is why soil is used in medicine. Medicines created by soil include skin ointments, tuberculosis drugs and anti-tumor drugs.

Beauty Products

Some beauty products are made with soil. Commonly used beauty products where used soil is used in the production include blush and foundation. Soil rich in clay can also be used in facial masks and toothpastes.

The main function of the soil is to serve as a seat, facilitate the permeability and circulation of water and air, being important for plant life.

What is soil?

It is the layer that covers the most superficial part of the planet and it is where plants grow and animals live.

Functions of soil

Biomass production.

It supplies water, air, and nutrients to plants, provides food, energy, raw materials, and natural traits.

Hydrological function.

It intervenes in the regulation of infiltration, storage and flow of surface and subsurface water and its quality.

Environmental function of filtering, storage and transformation.

Filtering, pH buffering, retention of hazardous waste compounds and polluting discharges, etc.

Biological habitat and gene pool.

Reserve of genes of animals and plants essential for the maintenance of biodiversity.

Wheater regulating function.

Sink of greenhouse gases and effects on the global energy balance and the global hydrological cycle.

Therefore, we can conclude that soils acts as a filter, buffer medium and storage of water, air, nutrients and chemical products or discharges.

Learn more about functions of soil here: https://brainly.com/question/939774


Responsible for the flow of
___, and other ______, and
hormones to and from.

Answers

Answer:

kidney

Explanation:

pancreas to regulate salt

Did y'all know grapes r toxic to doggos? Like how did I not know this? *~*

Answers

Answer:

lol yes

Explanation:

i knew. usually sweet things are

Yes I knew this lol

What is the role of transport
proteins in active transport?




Please help asap!! :)

Answers

C :)))))))))))))))))))))

Use your knowledge of osmosis to explain why the mass of each cube increased.

Answers

Osmosis passes from a medium with a high concentration of water molecules to another with a low concentration of water molecules and since the potato has low water concentration so the water transfers to it increasing its mass

The mass of each potato cube increased because they have gained water by osmosis.

Recall that: osmosis is the movement of water molecules from the region of high water concentration (high water potential) to the region of low water concentration (low water potential) through a semipermeable membrane.

A solution with a high solute concentration will have low water potential and vice versa. They are also said to be hypertonic when compared to a solution with a low solute concentration (hypotonic).

Thus, the potato cubes increased in size because the cells of the potato have low water potential when compared to the distilled water in which they were thrown. In other words, the cell sap of the potato cubes is hypertonic while the distilled water is hypotonic.

More on osmosis can be found here: https://brainly.com/question/21395644

The best determination of a community’s quality of life is _______.

Answers

The energy used per capita

Which of the following statements explains the importance of enzymes that check for and repair mistakes during DNA replication?

A
The enzymes replace the DNA with RNA
B
The enzymes speed up the rate of RNA synthesis.
C
The enzymes prevent many genetic mutations from being expressed
D
The enzymes remove many recessive gene copies from the nucleus.

Answers

Answer:

C!!

Explanation:

The statement explains the importance of enzymes that check for and repair mistakes during DNA replication is the enzymes prevent many genetic mutations from being expressed. Thus, the option C is correct.

What is RNA polymerase?

RNA polymerase is an enzyme that aids in the transcription of DNA into RNA during transcript in the nucleus. The enzymes prevent many genetic mutations from being expressed.

Primase is an enzyme that synthesizes short RNA sequences called primers. These primers serve as a starting point for DNA synthesis during replication as the DNA polymerases cannot begin the synthesis of the new strand, they only extend it after primase begins it and primase produces RNA molecules, the enzyme can be said to be a type of RNA polymerase.

Therefore, The statement explains the importance of enzymes that check for and repair mistakes during DNA replication is the enzymes prevent many genetic mutations from being expressed. Thus, the option C is correct.

Learn more about genetic mutations on:

https://brainly.com/question/1282397

#SPJ6

I NEED THIS ASAP!!!!!
Gravity is an example of which kind of force??
A) contact
B) noncontact
C) speed
D) direction

Answers

Answer:

I want to say B. Noncontact

Explanation:

I hope this helps!

Answer:

b

Explanation:

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Introduction: Match each example with the literary device that it showsAlicia was a sweet four-year-old, butshe also could be sneaky at times.ImageryThe wind hissed past the windows onthe dark and stormy night.ConflictCarlos and his twin, Juan, were bestfriends until the new girl arrived.Characterization How does the author connect Olive Schreiner and Isadora Duncans careers in the excerpt?A. The author explains how Schreiner analyzed Duncans natural dancing style in Women and Labor.B. The author argues that Schreiner and Duncans careers achieve similar, related goals for the womans movement.C. The author discusses why Schreiner is against Duncans dancing style due to its Grecian influences.D. The author demonstrates how Schreiners writing in Women and Labor inspired Duncans new style of dance. Which geometric sequence has a common ratio of -9?{-1, -9, 81, 729, }{1, -9, 81, -729, }{-9; -81; -729; -6,561; }{81; 729; 6,561; 59,049; }WILL GIVE BRAINLIEST!!!! Grace and her friend are doing some back to school shopping , Grace buys 4 binders and notebooks for 26.50 totalHer friend spends a total of $21.00 on 3 binders and 6 notebooks During the summer months, glaciers at the poles melt, delivering fresh water to the ocean. What does this do to salinity?Question 3 options:lowers salinityraises salinityit does not change the salinity Label if the following is physical or chemical weathering.1. The wedging of roots into rocks?2. Type of weathering that forms caves?3. Limestone dissolved by carbonic acid?4. Repeated freezing and thawing of rock causing it to break? 5. Acids from plant roots that break up rocks?6. Formations of potholes in the street?7. Formation of sinkholes?8. Decaying plants that dissolve rocks?9. Rocks carried by stream of water that ends up breaking up into smaller pieces?10. Tree roots that break up concrete on the sidewalk?Do as much as you can!! If you can't do all of them then just answer on what you have :)) Which of the following is NOT type of magnet apermanent magnet belectromagnet ctemporary magnet dDomain magnet Weight management may be easier for a person who inherited genes that tend toward obesity true or false? Parents have great influence over childs eating habits true or false? A rectangle is 4 times as long as it is wide. The perimeter is 30 feet. Find the dimensions. Which statement must be true according to the dot plot? The data is skewed to the right and shows that she never scored fewer than 2 points or more than 12 points in a game.The data is skewed to the right and shows that she scored 11 points in more games than all of the other games combined.The data is skewed to the left and shows that she never scored fewer than 2 points or more than 12 points in a game.The data is skewed to the left and shows that she scored 11 points in more games than all of the other games combined. what is the theme for where is here Which graph best represents directional selection?-Graph A-Graph B-Graph C Which of the following is most likely responsible for the fact that organic molecules no longer formed spontaneously on Earth?A. The amount of UV radiation increasedB. The amount of oxygen in the atmosphere increasedC. Water accumulated in the oceansD. Earth's surface temperature warmed Solve expression completely.64O1O 64O Unknown WILL MARK BRAINLIST PLS HELPThe letters for the word TENNESSEE are written on cards and then placed in a basket. What is the probability that on the first draw an E is picked, replaced, and then an S is picked?6/818/816/185/18 (t6)^2 t = 11 What is the answer please. As we are learning about and practicing claims inour lessons, it is time to start thinking about whattopic you may want to argue in your argumentpiece. Consider the topics we have beendiscussing in class: freedom, control, equality(racial, gender, etc), and more; if you were thepresident, what social issue would you addressfirst? Why? How? This should be a minimum ofthree well thought sentences. Assignment 1:Assignment: Focus on Commentary:Reply to this with commentary that connects the evidence to the claim: Claim: Another function of education is to promote the welfare of all children in the US. Evidence: For example, public schools are provided with federal money to give impoverished children free meals. Commentary: (complete this sentence) By ensuring students are fed... Evaluate your work space at home, school, or work. How would you design an adaptive environment for people who are mobility impaired? Here's an equation I need to solve:x/2 +3 = 10The first step is to subtract 3 from both sides:x/2 = 7What step do you do next to solve for x? divide by 2subtract 7multiply by 2add 7