Where do scientists think the water on Earth might have come from?


1. all planets have water from the sun

2. stars collided with dust particles

3. dust particles combined with magnetic forces around Earth

4. asteroid collisions delivered water to early earth

Answers

Answer 1

Answer:

number 2 is the right answer i think

Answer 2

Answer:

all plants have water from the sun


Related Questions

100 POINTS
Assume that r max is 1.0 and the carrying capacity is 2,000. calculate the population growth rate when n= 2,100 and when n = 2.500 individuals.

Answers

Answer:

Given:rmax = 1.0carrying capacity = k = 2000N = 2100N = 2500dN/dt =popu

Explanation:

The population growth rate when n = 2100 and when n = 2500 individuals is - 0.25 and for n = 2100 individuals , it is - 0.05 .

What is population growth rate ?

Population growth rate is the rate at which a population increases in size over a specific period of time, usually expressed as a percentage.

It is calculated by subtracting the number of deaths and emigrations from the number of births and immigrations, and then dividing this figure by the total population at the start of the period.

The logistic growth model can be used to calculate the population growth rate at a given population size (n) using the following equation:

r = r_max * ((K - n) / K)

where:

r = population growth rate

r_max = maximum per capita growth rate

K = carrying capacity

n = population size

Given r_max = 1.0 and K = 2,000, we can calculate the population growth rate for n = 2,100 and n = 2,500 as follows:

For n = 2,100:

r = 1.0 * ((2,000 - 2,100) / 2,000)

r = 1.0 * (-0.05)

r = -0.05

Therefore, when the population size is 2,100 individuals, the population growth rate is -0.05, indicating that the population is decreasing in size.

For n = 2,500:

r = 1.0 * ((2,000 - 2,500) / 2,000)

r = 1.0 * (-0.25)

r = -0.25

Therefore, when the population size is 2,500 individuals, the population growth rate is -0.25, indicating that the population is decreasing at a faster rate than when the population size was 2,100 individuals.

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Two new cells formed that have the same structure and number of chromosomes as the
parent cell
A. telophase
B. anaphase
C. interphase
D. metaphase

Answers

Answer:

B. Telophase

Explanation:

Telophase is the final stage in mitosis.  The result of telophase is two identical daughter cells with the same structure and number of chromosomes as the parent cell.

10. Social institutions are _ of the socialization process???. a. agents b. targets c. casualties d. opponents​

Answers

Answer:

agents is the correct answer of the question

Explanation:

hope it will help you

Temperature differences between
seasons can be beneficial to the
organisms in lakes and ponds.
Which of these is a benefit of
seasonal temperature
differences?
A. separates where certain fish can live
B. causes all vegetation to freeze
C. removes all terrestrial life

Answers

Answer:a

Explanation:

The benefit of seasonal temperature is separates where certain fish can live.

What is temperature?

Average temperatures rise year-round as a result of global warming (see the U.S. and Global Temperature indicator), while some seasons may experience greater rises than others.

Winter is especially susceptible to temperature increases. Overall, minimum temperatures have risen faster than maximum temperatures on average.

Thus, a large portion of the observed warming in the United States has occurred during the winter, during the night, and in the northern regions of the country—when and where it is typically the coldest.

Even while the United States has had numerous winters with extraordinarily low temperatures, these winters have grown less frequent overall.

Therefore, The benefit of seasonal temperature is separates where certain fish can live.

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Does the cell shown have a cell wall a cell membrane or both? Explain pls

Answers

I think it is the wall because the wall is what is outside protecting the cell right? So, wouldn’t it be the wall

Answer:

Both every cell especially this one needs both a cell wall and membrane

Explanation:

I learned this

which planet takes the longest time to orbit around the sun

Answers

Answer:

Planet Neptune

Explanation:

Given that it's a little further away from the sun, Neptune takes the longest time to orbit around the sun.

Cows cannot produce their own food. Cows are

Answers

Explanation:

As we know cows are dependent on plants so plants are the producers and cow which consume the produced food are known as consumers.

Plant--->Cow---->Lion----->Fungus (food chain)

Plant:- producer

Cow:-primary consumer

Lion:- secondary consumer

Fungus :- decomposers

What is unique about a cephalopod's vision among mollusks?
Group of answer choices

All species have sophisticated eyes, and squid, octopi, and cuttlefish have camera eyes.

A. All species have a camera eye.

B. They have complex compound eyes.

C. They have poor eyesight.

Answers

Answer: A. All species have a camera eye

Explanation:

Mollusk eyes vary in complexity, but cephalopods like squid, octopi, and cuttlefish have "camera eyes", meaning that they focus by movement. Cephalopod eyes are similar to vertebrate eyes in this way.

What type of cell where most of the dna is concentrated in the nucleus

Answers

The type of cell where most of the DNA is concentrated in the nucleus is eukaryotic

control of the housefly​

Answers

Answer:

hope this will help you

Explanation:

use sticky trapsuse ultraviolet light trapkeeping windows screened and doors closeduse insecticide spray

which cellular structure is possessed by all cells?
a. nucleus
b. cell membrane
c. chloroplast
d. mitochondria

Answers

Answer:

However, all cells have four common structures: the plasma membrane, which functions as a barrier for the cell and separates the cell from its environment; the cytoplasm, a jelly-like substance inside the cell; nucleic acids, the genetic material of the cell; and ribosomes, where protein synthesis takes place

Explanation:

Hope this helps.

The cellular structure that, is possessed by all cells, is the cell membrane. The correct option is b.

What is cellular structure?

Cellular structures are the components of cells. The nucleus, cell membrane, cytoplasm, and the cell organelle. The cell organelle is present inside the cellular membrane.

The cell membrane is the structure that posses by all cells, as it covers all the organs and the cells.

Thus, the correct option is b. cell membrane.

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Many citizens are concerned about the potential negative impact on human health of consuming genetically modified organisms (such as salmon). What would you tell them to try and alleviate their fears? (5 points)
GIVING BRAINLIEST! PLEASE DO A LONG (ISH) ANSWER!!!

Answers

The transmission of antibiotic resistance, toxicity, and allergenicity are all known to be major health risks associated with GM foods.

Some people worry that the increasing number of cell phones will cause cancer because of the energy of the radio waves they emit. Cell phones are a new technology that only recently became widely used. And because cancer takes years to develop, the amount of risk is not yet known.

summarize what’s known so far. In your summary, include information about the energy of radio waves. Be sure to only use credible sources. Based on what you learned from your research, do you think people should limit their cell phone use? Why or why not?

Answers

Answer:

Cell phones emit radiofrequency energy, a form of non-ionizing electromagnetic radiation, which can be absorbed by tissues close to the phone. The amount of radiofrequency energy a person is exposed to depends on the frequency of the signal and the amount of time they spend on the phone. The Federal Communications Commission (FCC), the International Agency for Research on Cancer (IARC), and the American Cancer Society (ACS) all agree that more research is needed to determine the possible health effects of cell phone use. So far, there is no scientific evidence that proves that cell phone use causes cancer. Some studies have suggested a possible link between cell phone use and cancer, but more research is needed to confirm these results. The ACS does not recommend limiting cell phone use because the risk of cancer is still unknown.

Hope this helps!

Explanation:

Answer:

If people are scared because phones cause cancer because of the radio waves why aren't they scared of laptops/computers/pc, TVs, and even tablets all of these are the same thing but bigger so why is it okay to not be scared to get cancer from these items? I think if we stop using our phones as much it will be good because not only will kids and teenagers touch grass more but they will be able to explore things they never knew existed. In my opinion, we should stop using all electronic a lot because they all probably do end up causing cancer and other issues in the future.

Explanation:

Hope it helps:) wrote it myself.

Definition for neutron science.

Answers

Explanation:

neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.

Assume that r max is 1.0 and the carrying capacity is 2,000. calculate the population growth rate when n= 2,100 and when n = 2.500 individuals.

Answers

Answer:

Answer my recent question

Why are seeds so important? what will happen if there are no more seeds.

Answers

we won’t be able to reproduce food and it will slowly kill the world by hunger
Seeds are important because: No seeds = No food, no vegetables.
No trees, no air.
We won't be able to produce food.



PLEASSEEEEE HELP ME

Answers

Answer:

Eukarya

Explanation:

Eukaryotic organisms have truel nucleus and nuclear membrane. Mammals and Fishes are Eukaryotic organisms cause their cells have nucleus and nuclear membrane.

When does the amniotic fluid form in humans​

Answers

Answer:

hope it's helpfull..... ;)

Part C. These Beatles have a uniform distribution. And you’re one how many Beatles are there per hectare? How many Beatles per hectare you were there in the year the Beatles Rich carrying capacity? Round up or down to the nearest whole number if necessary

Answers

In year 1, the population was 11,500 spread over 115 hectares.

What is carrying capacity?

Carrying capacity referred to as a specie's average population size in a particular habitat. The species population size is limited by environmental factors like adequate food, shelter, water. If these needs are not met, the population will decrease until the resource rebounds.

The number of beetles per hectare is 11,500/115= 100 beetles.

By year six, when the beetles reached the carrying capacity, the number of beetles per hectare is 14,677/115 = 128  beetles.

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A population distribution shows _______.
a. the distribution of age groups within a population
b. the amount of organisms in a unit area
c. the total number of organisms in a population
d. where and in what arrangement organisms are located Please select the best answer from the choices provided

Answers

A population distribution shows where and in what arrangement organisms are located (Option d).

What is population distribution?

The expression population distribution makes reference to the spatial arrangement of individuals of the same species in a given area.

The area in which the population is found is a fundamental parameter to analyze its distribution.

In conclusion, population distribution shows the arrangement of organisms (Option d).

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Answer:

It is D.

Explanation:

what 3 things make decomposition vitally important

Answers

Answer:

Nutrients are released as the remains are decomposed.Water is released. We need water.This process also prevents multiple corpses from being in a place, which would not be healthy for this environment.

which of the following often negatively affect an individual's thought processes​

Answers

Answer:

What causes mental health problems?

childhood abuse, trauma, or neglect.

social isolation or loneliness.

experiencing discrimination and stigma, including racism.

social disadvantage, poverty or debt.

bereavement (losing someone close to you)

severe or long-term stress.

having a long-term physical health condition.

Explanation:

Apply: Under Mode, select Crime scene 1. This is a sinister case of sabotaged stew in a swanky restaurant. Use the procedures you have learned to collect fingerprints, classify fingerprints, and use minutiae to match collected fingerprints to suspect fingerprints.

Which suspect broke into the Glitzy Gala and sabotaged the stew?

Answers

Answer:

Cora Colander

Explanation:

I'm not for sure if that is gonna be helpful or even right but, hope u have fun.

Cora colander is the suspect who broke into the Glitzy Gala and sabotaged the stew.

How to collect fingerprints at a crime scene?

1. Investigate: Click on different parts of the crime lab to look for other visible prints. (Hint: There are a total of two visible prints.) To see which parts of the lab you can see up close, select Show all locations. Photograph and categorize every print you come across.

2. Notice: After locating the two visible prints, a duster will appear in the upper right corner. The duster distributes fingerprint powder, which adheres to the skin oils that comprise latent prints and allows them to be seen. Drag the duster into the lab to dust for prints.

Repeat your search of the room. When you find a latent print, drag the roll of tape over it to collect it. (Latent prints are collected with tape that adheres to fingerprint powder.) Gather and categorize the three remaining prints.

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PLEASE HELP 50 POINTS
Which of these has happened to your food by the time it reaches your stomach?

A. Fats have been digested by salivary amylase.

B. Large proteins have been broken down into smaller proteins.

C. The food has become acidic and is in smaller pieces.

D. The starches have been partially broken down.

Answers

Answer:

D. The starches have been partially broken down.

Explanation:

Your saliva has salivary amylase, an enzyme that breaks down starch into smaller glucose monomers. Thus, by the food reaches your tummy, some of the starch has been broken down. Protein and fats are primarly broken in stomach and food also becomes acidic in stomach.

D. The starches have been partially broken down. Yes because your saliva has a protein that breaks down starches.

How is the source of energy collected?

Answers

Answer:sun

Explanation:

because the sun is the reason the water air and plants grow

how many genders are there in this spiraling down hill world?

Answers

Answer:

I think it is something like 72

Explanation:

i know what you mean

Which carnivores live only in marine habitats?
Cephalopods
Bivalves
Gastropods
Arthropods

Answers

Answer: Cephalopods are carnivores that live only in marine habitats.

Explanation: Hope it helps:)

A diploid strain of yeast that was trisomic for a chromosome carrying the Trp1 gene was sporulated. When the asci were dissected and tested for the ability to grow without tryptophan, some asci had 4 prototrophic spores and some asci had 2 prototrophic spores and 2 auxotrophic spores. What was the genotype of the diploid trisomic parental strain with respect to the Trp1 gene?

Answers

Answer: Prototrophs are strains that have the same dietary requirements as their parents. Auxotrophs are mutants that require more nutrients in their media to develope.

Explanation :Prototrophs are strains that have the same dietary requirements as their parents. Auxotrophs are mutants that require more nutrients in their media to develope.

Why would it be hard to find the ideal C02 level if the light intensity were very low ?

Answers

Answer:

It would be difficult to find the ideal CO2 level with a low light intensity because the plant will have a difficult time trying to survive. It would be very hard considering with no light there's no reaction.

Explanation:

trust

Which phrases describe the importance of resource economics? Check all that apply.
maintaining healthy ecosystems
ensuring that resources are available for the future
increasing profits of companies
defining which resources are renewable
evaluating the costs and profits of resource use
monitoring impact of resource extraction on the environment

Answers

Answer:

A,B,F

Explanation

because these are the most imporatant  things on the list

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