what were some of the earliest life forms? and what were they like

Answers

Answer 1
The earliest forms of life were microorganisms. These organisms appeared about 3.77 billion years ago.

Related Questions

What is a recessive allele?

Answers

Answer:

A type of allele that when present on its own will not affect the individual. Two copies of the allele need to be present for the phenotype to be expressed.

Explanation:

Answer:

A recessive allele is a variety of genetic code that does not create a phenotype if a dominant allele is present. An allele is a specific variation of a gene, or specific segment of DNA. Different alleles produce slightly different proteins, which function in different ways.

Explanation:

Hope this helps

have a great day!

Light-dependent and light-independent reactions occur at the same time. True or False

Answers

true  because they are driven by the ATP made by the light-dependent reactions. Both systems shut down in the dark. The light-independent reactions can last a little longer if there is ATP remaining in the chloroplast.

Help me I’ll give 50 points helppp!

Answers

Answer:

2 Refraction, Transition/bouncing?

7. Opaque, absorbs

Explanation:

StraightLustre,ShineMirrorTransparency, PropertyNot deep,less fastersee,redoblique ,blockswood,more metals,Board,pen

Can someone please helpppppo I’ll mark the brainliest

Answers

Answer:

C [the third one btw]

Explanation:

He believed that evolution gradually [slowly] happened over time.

Hope this helps :D Have a great day

please help i will give brainlist

Answers

Answer:

I think it's c hope I hope I helped if not I'm sorry:(

Option B is i hope
I think it is

A group of students wants to investigate the effect of the concentration of salt in salt solution (2, 5, 10, 15%) on the growth of the mint plant after three weeks of planting. Write a procedure helping the students to carry out their investigation.

Answers

Answer:cccccccccccccccccccccccc

Explanationccccc

Mutations that are passed to offspring must
OCcur
in

Answers

Answer: Gametes

Explanation:

what is reduced soil?

Answers

Answer:

A chain of reactions is initiated upon soil flooding leading to reduced (low) soil redox potential (Eh, mV) conditions. These reactions include physical, chemical and biological processes that have significant implications for wetland plants.


Physical processes include restriction of atmospheric gas diffusion in the soil leading to depletion of soil oxygen and accumulation of carbon dioxide [4,5]. ... This process leads to oxygen depletion and reduction in soil oxidation reduction potential (Eh) followed by a chain of soil chemical changes.

Name three sources of atmospheric carbon dioxide. (Write in complete sentences and be very detailed.)

This is science.
First and best answer gets 5 stars, a thanks, and a brainliest!

Answers

Simple and easy but three sources are:
1. Decomposition
2. Ocean Release
3. Respiration

Answer:

Yes, there are natural sources of atmospheric carbon dioxide, such as outgassing from the ocean, decomposing vegetation and other biomass, venting volcanoes, naturally occurring wildfires, and even belches from ruminant animals.[1]

[1](www.climate.gov/news-features/climate-qa/doesnt-carbon-dioxide-atmosphere-…)

Which statements about freshwater sources are true? Check all that apply. B Only about 3 percent of Earth's water is fresh water Most of the fresh water on Earth is groundwater. About 75 percent of the fresh water on Earth is frozen in ice sheets. The largest source of usable fresh water is groundwater. More fresh water is in the atmosphere than in rivers and lakes. ​

Answers

Answer:

all but 3 percent

Explanation:

because i looked it up

Answer:

groundwater is correct

Which of these is thickes layer of earth

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Answer: core

Explanation:

The core is the thickest layer of the Earth, and the crust is relatively thin, compared to the other layers.

if an object is 3 AU from the sun, it is

Answers

Answer:

That probably refers to asteroids.

Explanation:

There is a large belt of asteroids between the orbits of Mars and Jupiter.

Can someone explain the Punnett square ?

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Answer:

so in the punnet square, you hvae the 4 squares inside the big on. on top of the square, you have 2 letters, representing the dominant and the repressed genes. On one side, typically  the left, you have another two letters, again genes. to get the gene types to fill in your squares, you take the first letter of the top set and the first letter of the side set. for this example, we are going to use Bb(top) and BB(side). you would take the B from the top, and you would pu it with the B from the side. in the top left square, you should have BB. next, you go and take that same top B and do it with the second letter of the side, B again. this again gives you BB.  next, you take the second letter of the top, b, and you join it with B. in the top right square, you would write or type in Bb. Even though the b was on top, it is after the B because in this cause, it is not the dominant gene. when you do the second top and side letters together, you again get Bb.

Explanation:

the main points.

in this example, i used B to be the dominant gene and b to be the repressed/ submissive gene. you always put the dominant gene letter before the repressedmake sure you fill the squares in properly. in this one, you should have 3 BB and 1 Bb. this shows that the gene set BB is going to showwhen you fill in the squares, the first top letter and the first side letter fill in the top left square.the first top letter and the second side letter go left bottom.second top letter and first side letter go in right top.second top and second side go in right bottom.always place the dominant gene first in the punnet square.

add me and message me if you need more help. we can also zoom to figure it out.

The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach. The diagram is used by biologists to determine the probability of an offspring having a particular genotype.

Does anyone know the answer?

Answers

Answer:

Fungi

Explanation:

Brainliest - Answer Quickly
What is the source of all energy in an lecosystem?

Options:
Cellular Respiration
Photosynthesis
Recycling of Matter
Solar Energy

Answers

Answer:

solar energy

please mark me brainliest..

have a good day

Answer:

SOLAR ENERGY

Explanation:

PLEASE MARK ME AS BRAINLIEST

MULTIPLE CHOICE QUESTION
Why do scientists think that cuttlefish
have the biggest brain to body ratio of all
invertebrates (animals without a spine)?

Answers

Answer:

Due to its high intelligence.

Explanation:

Scientists think that cuttlefish  have the biggest brain to body ratio of all  invertebrates that allows it to sense sight, smell, and sound that comes to it in the form of pressure waves. Due to this big brain, cuttlefish are very intelligent so due to its intelligence the scientists thinks that cuttlefish has the biggest brain as compared to other big vertebrates such as octopus.

Question 1 (4 points)
(04.01 LC)

Rocks created from the cooling of magma or lava are called (4 points)

Answers

Answer:

igneous rocks

Explanation:

brainliest plz?

Answer:

the answer is igneous rocks

Explanation:

I did the exact same test because I am also from the same school (FLVS)

NEED HELP WITH THESE 4 QUESTIONS WILL GIVE BRAINLIST!!!
1.What were some characteristics that the finches developed to give them an advantage in surviving?

2.How do you think that the one species of finch evolved into many different species, each with its own advantages?

3. In what ways do these advantages help the finches to survive and reproduce?

4. What might have happened if the finches didn't evolve into many different species?

Answers

Answer:

1. Because the drought reduced the number of seeds and finches with bigger beaks were able to eat the larger and harder seeds so more of them survived.

2. Summary: Changes in the size and form of the beak have enabled different species to utilize different food resources such as insects, seeds, nectar from cactus flowers as well as blood from iguanas, all driven by Darwinian selection

3.  Medium ground finches with larger beaks could take advantage of alternate food

4. three species of Darwin's tree finches have been known to inhabit Floreana  but no birds singing that song on Floreana have been heard in many years.

Explanation:

What is osmoregulation?

Answers

Answer:

adalah penghijauwan kota

Osmoregulation is the active regulation of the osmotic pressure of an organism's body fluids, detected by osmoreceptors, to maintain the homeostasis of the organism's water content; that is, it maintains the fluid balance and the concentration of electrolytes (salts in solution which in this case is represented by body fluid) to keep the body fluids from becoming too diluted or concentrated. Osmotic pressure is a measure of the tendency of water to move into one solution from another by osmosis.[1] The higher the osmotic pressure of a solution, the more water tends to move into it. Pressure must be exerted on the hypertonic side of a selectively permeable membrane to prevent diffusion of water by osmosis from the side containing pure water.

Organisms in aquatic and terrestrial environments must maintain the right concentration of solutes and amount of water in their body fluids; this involves excretion (getting rid of metabolic nitrogen wastes and other substances such as hormones that would be toxic if allowed to accumulate in the blood) through organs such as the skin and the kidneys.

in what cells, do the cell cycle occur?

Answers

Answer:

In eukaryotic cells, or cells with a nucleus may this help u buddy

eukaryotes cells or cells with a nucleus

What is a constant?
O a variable
a number that stands alone with no variable
O the number in front of the variable
O two terms that look exactly the same


need help please

Answers

Answer:

a number that stands alone with no variable

Hope this helps!

Can someone help me please and thank you!!

Answers

Answer:

It should be the one that's selected in the image.

Explanation:

Triglycerides store unused calories and provide your body with energy. Cholesterol is used to build cells and certain hormones.

True or false scientific name tells you to family in which the organism belong

Answers

Answer:

False

Explanation:

A scientific name for a species is a unique name, which means that no species can have the same scientific name. The scientific name of a species tells you the genus and the species name of an organism. The genus comes first in the name and is the more inclusive group of organisms.

Arrange the levels of ecological organizations from smallest to largest

population
organism
community
ecosystem

Answers

Organism, Community, population, ecosystem

What absorbs water in the digestive system

Answers

Your answer is Small Intestine.

Your small intestine makes digestive juice, which mixes with bile and pancreatic juice to complete the breakdown of proteins, carbohydrates, and fats. Bacteria in your small intestine make some of the enzymes you need to digest carbohydrates. Your small intestine moves water from your bloodstream into your GI tract to help break down food. Your small intestine also absorbs water with other nutrients.

Answer: Small intestine

Either you put small intestine in the wrong place, or you're able to put the same one for multiple questions

Lloyds lab partner is looking down into a test tube while he hears the contents by using a flame. Which action should Lloyd recommend to his partner if heating must continue?

Answers

Answer:

To stop looking throught the test tube. lol

Explanation:

Predict the effect on shrubs growing in one area if they are treated with a compound that blocks electron flow through the electron transport chains of chloroplasts. Provide reasoning to justify your prediction.

Answers

Answer:

The shelves or die and will not be able to produce sugars. Blocking electron flow prevents the formation of the proton gradient required to produce the ATP used for sugar production.

The shrubs will die because they cannot photosynthesize. Without it, plants begin to wilt and finally die because photosynthesis requires light.

In the absence of photosynthesis, do plants die?

In essence, photosynthesis is the mechanism that powers the survival and growth of plants and even algae. The majority of plants would perish quickly if photosynthesis suddenly stopped.

Night-time is not a time when plants engage in photosynthesis. Only when exposed to the right wavelengths of artificial light during the night can plants perform photosynthesis. Light energy is absorbed with the aid of the pigment chlorophyll. Light energy is converted into chemical energy through the process of photosynthesis.

To learn more about photosynthesis refer to:

https://brainly.com/question/19160081

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What is the purpose of the other tube of water?

Answers

Explanation:

cant see photo

Answer:

delude the other thing

there is no picture so i have no idea what your asking. ill edit this answer to be more specific when you explain

Explanation:

Which of the following provides the best summary of the process of natural
selection?
A. Populations become better adapted to their environment.
B. Individuals pass on their best traits to their offspring.
C. Individuals always change in response to their environment.
D. Population sizes increase with every generation.
SUBMI

Answers

Answer:

c

Explanation:

What is a similarity and a difference between the stars Rigel & Betelgeuse?​

Answers

Stars as large as Betelgeuse are very unusual. In contrast, Rigel, the bright, bluish-white star at the southwest corner of Orion, is smaller and much hotter than Betelgeuse. Although Rigel is smaller than Betelgeuse, it is still a super-giant star compared to the sun.

hope this helps ^^

Answer:

Stars as large as Betelgeuse are very unusual. In contrast, Rigel, the bright, bluish-white star at the southwest corner of Orion, is smaller and much hotter than Betelgeuse. Although Rigel is smaller than Betelgeuse, it is still a super giant star compared to the sun

i hope this helps~

Other Questions
slope = 2; 3-intercept=-1 What is (-6,3) reflected across the x axis What are the challenges of human interactions? Which of the following is true given that -4 > -9?A.-4 is to the left of -9 on a horizontal number lineB.-4 is at the same place as -9 on a horizontal number lineC.-4 is the opposite of -9 on a horizontal number lineD.-4 is to the right of -9 on a horizontal number line ill give you brainliest if you answer fast and correctly 40 POINTS (1) WILL GIVE BRANILESTi DONT LIKE ABSURD ANSWERSThank you! Please please help me Given what culture means, given an examples of what might count as a cultural achievement. a sample of an unknown metal has a mass of 21.6g and volume of an 8.00cm3 calculate the density of the unknown metal Translate the figure 7 units right and 3 units down.Plot all of the points of the translated figure. caleb bought 6 packs of pencils for $18. How much will he pay for 8 packs of pencils. What is (-4/7) - (-10/7)=? 3x + 10 = 4x +54. How did you get your answer? The Northwest Ordinance of 1789, which effectively created the Northwest Territory, banned slavery in this newly created territory of the United StatesWhat was a major long-lasting effect of the Northwest Ordinance.A) established the Ohio River as the permanent boundary between free and slave states that lasted until the Civil warB) U.S. Supreme Court recognized the authority of the Northwest Ordinance to extend to all states as the states entered the UnionC) prohibition of slavery within the territory and establishing the Ohio River as the border between free and slave states in the territoryD) creation of slavery within the territory and establishing the Ohio River as the border between the free and slave states in the territory If a diploid tomato cell has 24 chromosomes, how many chromosomes will the tomatos gametes have?a) 6b) 12c) 24d) 48 How do Jerome and carlos respond to being bullied True or false: After returning from their journey, Lewis became Governor of the Louisiana Territory while Clark became Governor of the Missouri Territory. They both lived long happy lives. which organ circulates blood throughout the entire body? Read the passage and then answer the question A mother and father and their two children are struggling - with money and with society. They decide to move out to the country where land is cheaper. There, they try to start a new life. For this story to qualify as a work of Modernism, how best should it end? O A. They discover their true problem in life is one another. O B. Through hard work, they manage to slowly tame the land. O C. Outlaws attack their homestead; a stranger rescues them. OD. A tomado strikes, destroying their property, but they live. What is an internal conflict in literature?A. a fight between two people in a familyB. the struggle with an outside forceC. the psychological struggle in ones mindD. an argument between work partners