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#1 Which of these events happened earliest in the history of life on Earth?
A. eukaryotic cells with a nucleus
B. skeleton made of bone
C. multicellular organisms, like algae
D. opposable thumbs

#2 Which of these events happened earliest in the history of life on Earth?
A. dinosaurs
B. early animals
C. prokaryotic cells
D. eukaryotic cells

#3 Early life needed which of the following conditions to exist?
A. building block molecules
B. a source of energy
C. instructions
D. all of these were necessary

#4 It is thought that prokaryotes that were good at making ATP began to live inside other prokaryotes that were good at getting glucose. One provided glucose while the other shared its ATP. This formed early mitochondria, and natural selection favored these cells and they diversified to many forms. This idea is called the
A. cell theory
B. endosymbiont theory.
C. mitochondria theory.
D. eukaryotic theory.

Answers

Answer 1

Explanation:

4) option B endosymbiont theory

2) option C prokaryotic cells


Related Questions

please answer fast! 69 points

Answers

Answer:

The answer is D

Explanation:

Renewable resources need to be protected

Answer:

Renewable resources need to be protected.

Explanation:

Many resources deplete if handled irresponsibly. Renewable resources will endure a lot longer if used correctly and effectively. People may reduce their waste and use natural resources effectively by practicing conservation.

The vegetative body parts of a higher plant is made up of-----------,------------and----------.​

Answers

Explanation:

The vegetative pats of a higher plant is made up of ROOTS,STEM and LEAVES.

HELP ME PLEASE!!!! answer the ones you know
What happens when each muscle contracts? Ex. Biceps = bends arm at the elbow
1) Deltoids =
2) Latissimus Dorsi =
3) Pectoralis Major =
4) Trapezius/Rhomboids =
5) Rectus Abdominis =
6) Erector Spinae =

Answers

Answer:

For example, the biceps muscle, in the front of the upper arm, is a flexor, and the triceps, at the back of the upper arm, is an extensor. When you bend at your elbow, the biceps contracts. Then the biceps relaxes and the triceps contracts to straighten the elbow.

Which best describes how a diet with low carbohydrate intake would affect glucose levels and cellular respiration?

A. Glucose levels would decrease, and cellular respiration would decrease.

B. Glucose levels would increase, and cellular respiration would decrease.

C. Glucose levels would increase, and cellular respiration would increase.

D. Glucose levels would decrease, and cellular respiration would increase. ​

Answers

Answer:

A

Explanation:

After being digested carbohydrates are broken down into glucose so there would be a decrease in glucose levels. Glucose is needed for cellular respiration so it would also decrease

The infection that puts women at risk for cervical cancer is.

Answers

Answer:

human papillomavirus (HPV)

Explanation:

Its a type of cancer that puts women at risk or even death when it is not treated properly.

The breaststroke is started in the dive position in the water

Question 4 options:
True or false

Answers

Breaststroke starts:

Swimmers need to dive in for breaststroke in the same way as in front crawl and butterfly.

The breaststroke is not started in the dive position in the water. Therefore, the statement is false.

What is breaststroke?

The breaststroke is not started in the dive position in the water. It started in a stationary position with the swimmer, which faces forward and floats in the water.

The swimmer then takes a breath followed by the beginning of the stroke by pulling both arms back simultaneously and lifting their head and shoulders out of the water.

The legs are brought together by the swimmer andglides forward before the repetition of the arm and leg movements. It is the butterfly stroke because of the dive position, as the swimmer resurfaces both arms extended above the head to begin the stroke.

Therefore, the breaststroke is not started in the dive position in the water as it is started in a stationary position with the swimmer facing forward and floats in the water.

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What causes lactic acid fermentation?

A. too much ATP
B. an upset stomach
C. insufficient oxygen
D. too many mitochondria

Answers

C

Explanation:

Lactic fermentation can be caused by lack of oxygen inside of the muscle cells.

WILL GIVE BRAINLIEST IF UR RIGHT!

Which action is necessary to halt the decline in biodiversity?


continue mining practices as they are


continue using fossil fuels at the present rate


adopt ecological conservation practices


adopt laws that address issues of economy over environment

Answers

Answer:

"adopt ecological conservation practices"

Answer:

adopt ecological conservation practices

Explanation:

please i need the last brainliest

Normal urine from a healthy person should not contain __________.

Answers

A healthy person’s urine must not contain glucose


High blood sugar

A little bit amount of glucose like 0.25mg/ml is totally normal but when it surpasses this level it becomes a thing of concern.

On a normal basis, the excess glucose ought to be absorbed back into the body by the kidney but when this doesn’t happen and it is expelled out through the urine then it could be a sign of diabetes and could mean that the individual is suffering from Glycosuria.


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Answer:

Dark coloring, or a thicker consitency

Explanation:

( for an easier answer ig)

What percentage of renewable energy do apple retail stores run on?.

Answers

Answer:

100 percent renewable energy

The company recently shared new details about its $4.7 billion spend in Green Bonds to support environmental projects around the world. While running on 100 percent renewable energy for nearly three years, Apple has also been helping its suppliers reach their renewable energy goals.

breeding from an existing selection
creating high-producing animals
using biotechnology for breeding

Answers

Breeding creating high-producing animals by using biotechnology in order to create a productive organism.

What is genetic enginnering?

Genetic engineering is the process in which we use recombinant DNA technology in order to change the genetic makeup of an organism.

So we can conclude that breeding creating high-producing animals by using biotechnology in order to create a productive organism.

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Part F
The rate at which an object weathers is determined by many different variables. For example, compare the two ancient
Egyptian structures below.
Both structures were carved in Egypt from the same type of rock more 1,000 years ago. However, the obelisk in New York
which was transported there from Egypt in 1881, has since experienced a much higher rate of weathering. What factors
likely sped up the weathering process for the structure that was moved to New York?

Answers

Answer:

One thing that can speed this is up is a building not being vacant or being in direct sunlight for far too long.

I think this is what you need, right?

Which method is best for seperating salt and breadcrumbs?

Answers

Answer:

Filtering to obtains breadcrumbs and the heat the salt solution to saturation and cool it

Absorption of glucose from the gut lumen depends on.

Answers

Answer:

protein and starch

Explanation:

the absorption depends on protein and starch

Which product is the result of mitosis?

two genetically identical nuclei

four sperm and four eggs
four genetically identical nuclei
two sperm and two eggs

Answers

Answer:

two genetically identical nuclei

Explanation:

The result of mitosis is two identical daughter cells, genetically identical to the original cell, all having 2N chromosomes.

Hope this helped <3 brainliest please? :)

Proteins are produced in the cell's ____.

Answers

Answer:

Amino acid cells

Explanation:

Protein is produced in cells amino acids go to DNA then RNA

------------------------ Awesome ------------------------

12.
A lizard species mostly eats fruit from one
particular type of tree. If a virus kills most of
these trees, which individual lizards will most
likely survive?
A.
lizards that can climb higher in the fruit trees
B.
lizards that have darker coloration
C.
lizards that can find other types of food
D.
lizards that produce more offspring

Answers

c

I think it’s C because they can find other foods since the food they eat from a particular trees are dead

In any population, some individuals will have more kids than other individuals (just by chance). Some of those individuals will be "lucky" and survive. Explain the cartoon and how it shows this idea.​

Answers

Answer:

By people stepping on the little bugs, it kills them. and when they are born some will die and others won't

Explanation:

The cartoon refers to the principle of natural selection, which operates in many species, including bugs.

When individuals of a species reproduce, their offspring inherit certain traits or characteristics that can be advantageous or disadvantageous. In the case of bugs, some may have stronger exoskeletons, faster reflexes, or better camouflage, which can help them survive being stepped on or avoid being noticed by predators.

As a result, those bugs with advantageous traits are more likely to survive and reproduce, passing on their favourable characteristics to the next generation, while those without these traits are more likely to die. This is an example of natural selction.

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True or False: Traits that are beneficial in one environment will always be beneficial in another environment

Answers

Answer:

False.

Explanation:

Natural selections favors traits that are beneficial in a specific environment. Traits that are helpful in one environment might actually be harmful in another.

10 A solution of sugarcone was, boiled with hydrochloric acid Sodium carbonate was heated with a Benedict solution An orange precipitate was formed .Why' was e solution boiled with hydrochloric acid.​

Answers

Answer:

the answer to the nearest whole thing was that a few times now that I have the same

removal of heavy metals from the soil can be done by trees.justify​

Answers

This is true because trees absorb nutrients from the soil in order to survive , in the process of absorbing these nutrients the heavy metals will be taken with it! Hope this helped

Large-scale evolutionary trends are the result of _____

Answers

Answer:

macroevolution

Explanation:

The answer is…Macroevolution

A glucose molecule is the

Answers

Answer:

The answer is B) monomer of starch and cellulose.

The person above me is right! Have a nice day :)

The presence of specialized cells in the root system of a grass plant benefit the plant by improving its ability to:.

Answers

Specialized epidermal cells aim to increase the absorption surface in the root system of a grass plant.

What are specialized cells?

They are those committed to the fulfillment of a specific function within a cellular system or tissue.

These help to absorb nutrients and are found, fundamentally, in the piliferous zone of the root.

Therefore, we can conclude that specialized epidermal cells aim to increase the absorption surface.

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What is the difference between the domains eukarya and bacteria.

Answers

Answer:

The main distinction between bacteria and eukaryotes is that bacteria lack a genuine nucleus and membrane-bound organelles, whereas eukaryotes have both.

Explanation:

^^

Which of the following environment changes is most difficult to survive

Answers

Answer:

Transition from a meadow to a forest

Explanation:

What is Mendelian inheritance

Answers

Mendelian inheritance refers to an inheritance pattern that follows the laws of segregation and independent assortment in which a gene inherited from either parent segregates into gametes at an equal frequency.

How many chloroplasts are present in a typical plant cell?

Answers

Answer:

10-100 chloroplasts

Explanation:

If a square-eyed, orange pet mates with a round-eyed, green pet, can they have any round-eyed orange
offspring? Explain

Answers

Yes, round-eyed orange offspring is formed because this round eyed feature is present in one of the mating organisms.

Can offspring of round-eyed orange produced?

If a square-eyed, orange pet mates with a round-eyed, green pet, they can also have round-eyed orange offspring because this round eyed feature is present in one of the mating organisms.

So we can conclude that round-eyed orange offspring is formed because this round eyed feature is present in one of the mating organisms.

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Do you think that the number of birds that are killed by wind turbines each year is acceptable? Why or why not? State your opinion and give reasons to support it. Answers must be at least three sentences.

Answers

Answer:

One of the most commonly repeated criticisms of wind power is that it kills birds. The giant spinning turbines are basically bird death traps—and often they cut through prime flying space, making the carnage even worse. At least that's the story. But how many birds really do die?

If you look around for statistics about bird deaths from wind turbines get you wildly different numbers. Some say just 10,000 birds a year

Explanation:

One of the most commonly repeated criticisms of wind power is that it kills birds. The giant spinning turbines are basically bird death traps—and often they cut through prime flying space.

What are the benefits of wind power?

The majority of wind power or wind energy is generated through the use of wind turbines. Wind power is a popular, long-lasting, and renewable energy source that has less of an environmental impact.

The process by which the wind is used to generate mechanical power or electricity is referred to as wind power or wind energy. The kinetic energy of the wind is converted into mechanical power by wind turbines.

This motion energy, or wind flow, is utilized by humans for numerous purposes: flying a kite, sailing, and even making electricity. The process by which the wind is used to generate energy is both referred to as "wind power" and "wind energy."

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