In which era did human history begin?
A
Cenozoic
B
Paleozoic
С
Cambrian
D
Precambrian
E
Mesozoic

Answers

Answer 1

Answer:

Prehistoric

Explanation:

The Prehistoric Period—or when there was human life before records documented human activity—roughly dates from 2.5 million years ago to 1,200 B.C. It is generally categorized in three archaeological periods: the Stone Age, Bronze Age and Iron Age.


Related Questions

Explain how meiosis results in four haploid daughter cells.

Please help this is due today and I really need help

Answers

Answer:

phones

Explanation:

Kennedy Space Center is located on Florida’s coast directly east of Orlando. It is one of several NASA centers and facilities around the country. Which of these activities happens only at Kennedy Space Center?


shuttle landings

manned launches

astronaut training

commercial launches

Answers

Answer:

Shuttle landing

Explanation:

Answer:

Shuttle landings

Explanation:

Daughter cells formed by mitosis have exact copies of the parent cell's DNA. What process ensures that is possible?

Answers

so the process involves copying the chromosomes first and then carefully separating the copies to give each new cell a full set

Daughter cells formed by mitosis have exact copies of the parent cell's DNA. The anaphase process ensures that is possible.

What is mitosis?

Cell division occurs during mitosis. All eukaryotic cells go through the process. There are four stages to the process. The cell divides during the procedure. A daughter cell that is identical to the parent cell is created.

Prophase: This is mitosis's initial phase. At this point, the chromosomes begin to compress and the cell begins to break.

This is the second phase, or metaphase. The chromosomes align in the spindle fiber during this stage, and a checkpoint is also established.

Anaphase: At this time, the sister chromatids separate, align, and the chromosomes divide.

The final phase is known as the telophase. The nuclear membrane developed as the nucleus closed.

Therefore, the process that ensures the daughter cells formed by mitosis have exact copies of the parent cell is the anaphase.

To learn more about mitosis, refer to the link:

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what animal has the strongest bite force

Answers

Answer: I think crocodile

Explanation:

Answer:

I'm pretty sure it is jaguar

this is my thousands time asking: please help

Answers

the answers c

hope it helps!

Answer:

hey bro i think its A

Explanation:

Which molecules contain only carbon, hydrogen, and oxygen?
Select all that apply.
carbohydrates
glucose
proteins
O nucleic acids

Answers

[tex] \huge \purple{\tt{Answer:}} [/tex]

glucose

The molecule here that contains only carbon, hydrogen, and oxygen is Glucose. So the correct option is B.

What is glucose?

Glucose is a monosaccharide or simple sugar. It is a kind of sugar found in honey and fruits. Glucose is the major sugar present in our body.

It is the main source of cellular energy utilized in the process of cellular respiration. Thus, it helps in proper cell functioning and metabolism.

Starch molecules are composed of various monomers of glucose. They are the polysaccharides of glucose. The structural formula for glucose is C₆H₁₂O₆. This means that glucose is only composed of carbon hydrogen and oxygen atoms.

Glucose is a type of Carbohydrate but there are other kinds of carbohydrates that contain elements like nitrogen and sulfur. Proteins and nucleic acids also contain other elements like phosphate, nitrogen, and sulfur.

Thus only glucose is composed of oxygen, carbon, and hydrogen.

Therefore the correct option is B.

Read more about glucose, here

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help pls :3

Is the energy transferred to each organism in this food web the same? explain your answer.​

Answers

Answer:

Is the energy transferred to each organism in this food web the same? Yes

Which of the following have improved farming practices and crop production? Select all that apply.

Increased number of farmers
Sophisticated irrigation
Chemical fertilizers
Chemical pesticides

Answers

Answer:

sophisticated irrigation, chemical fertilizers, chemical pesticides

Explanation:

The use of irrigation to provide needed water and the use of natural fertilizers to promote crop growth are farming methods that have been practiced for centuries. More sophisticated irrigation techniques, various chemical pesticides, and modern chemical fertilizers have been developed in the twentieth century.

Evolution is any change in the heritable traits within a
A. generation
B. population
C. individual

Answers

Answer:

B. population

Explanation:

CORRECT

Evolution is any change in the heritable traits within a population. Therefore, option (B) is correct.

What is evolution?

Evolution is the process by which populations of organisms change over time through the gradual accumulation of genetic variations. It is the central concept of modern biology and provides a framework for understanding the diversity of life on Earth.

Evolution occurs through the mechanisms of natural selection, genetic drift, gene flow, and mutation. Over time, genetic variations that confer a survival advantage in a particular environment become more common in a population, while those that are detrimental or neutral are selected against.

This process can lead to the emergence of new species, as well as the extinction of others. The study of evolution has practical applications in fields such as medicine, agriculture, and conservation, and helps us understand our place in the natural world.

Learn more about evolution, here:

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Need help Fast please Science

Answers

Answer:

Im pretty sure it's A

Some dairy farmers want to increase the amount of milk produced by their cows. How can the farmers use selective breeding to increase milk production?

Answers

Answer:

By choosing cows that are high milk producers

Explanation:

Answer:  By choosing cows that are high milk producers

Explanation:

Read the two statements given below.

Statement 1: All living matter at the smallest level is made of cells
Statement 2: New animal cells are formed from pre-existing animals

Which of the following best relates the statement to the correct type of theory? (5 points)

a
Both statements are about scientific theories.

b
Both statements are about everyday life theories.

c
Statement 1 is about an everyday life theory, and statement 2 is about a scientific theory.

d
Statement 1 is about a scientific theory, and statement 2 is about an everyday life theory.

Answers

A. they do not talk about everyday life. It is purely science.

WHAT ARE THE THREE PARTS OF DNA⁈ ( help due right now !! ) ʅ(◞‿◟)ʃ

Answers

1. a phosphate group

2. a sugar group

3. one of four types of nitrogen bases.

Hope I helped and good luck with your assignments!!! ^^

__________________________________________________

1.リン酸基

2.糖基

3.4種類の窒素塩基の1つ。

私があなたの割り当てを手伝って頑張ってくれることを願っています!!! ^ ^

What does Binomial Nomenclature mean? (In the grand scheme people! No one-word answers!)

Answers

In the grand scheme of things, binomial nomenclature helps identify and differentiate various species of plants, animals, bacteria, etc.

What would happen if I poured a glass of water into a beaker with 90% clay and 10% sand? Would the water rush through the soil or would it move slowly through the soil? Please explain your answer.

Answers

Answer:

it would go slowly on the sand but when it touches the clay it will go faster

Explanation:

Which of the following is NOT an example of evidence that supports the theory of evolution?

Answers

you haven’t gave any examples :)

why is recombination important to evolution

Answers

Hope this helps you

Vascular
plants contain tubelike structures that transport wat
and nutrients, which allows these plants to grow_______
than
nonvascular plants.

Answers

Answer:fronds

Explanation:

How does oxygen concentration in the atmosphere correlate with animal diversity?

Answers

Answer:

Oxygen burns the food within their bodies and releases energy for various activities and thus it helps animal to be alive. to use it in respiration. Animals need oxygen (O) to survive. In fact, all organisms need oxygen to complete the process to burning glucose for fuel.

Explanation:

WILL GIVE BRAINLIEST PLEASE HELP

You determine that the soil in your backyard is 70% silt, 30% sand, and 35% clay. Is this a good soil to grow crops?

Answers

Answer: Yes

Explanation:

I’m not sure why it seems right tho

point
Look at the materials shown below.

Plant
Gold
Silver
Water

Which of these materials are minerals?
а silver and water
B silver and gold
C plant and gold
D plant and water

Answers

Answer:

Silver and gold

Pls Help!!! will give Brainliest!!!!!!!!!!!!!

Answers

Answer:

Example: Grass(producer)--->Grasshopper(Primary)---->blue bird(Secondary consumer)--->Rattlesnake(Teritary)

Example 2:Oak Tree leaves(Producer)--->caterpillar(primary producer)---->Treecreeper(Secondary)---->Hawk(Teritary)

Example 3:Grass(producer)--->Grasshopper(Primary)(again lol)--->Frog(Secondary)--->Snake(Teritary)

(Note:I hope this helps because I learn this food chain in my biology class ^^)

1. What structures will a blood cell pass through
as it moves through the heart from the vena
cava to the aortic valve?

Answers

Right side of the Heart

Explanation:

Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.

What best explains why there's fewer secondary consumers than producers?

Answers

Answer:

because of inefficiency

Explanation:

The organisms that eat the primary consumers are meat eaters (carnivores) and are called the secondary consumers. ... Because of this inefficiency, there is only enough food for a few top level consumers, but there is lots of food for herbivores lower down on the food chain. There are fewer consumers than producers.

1 Which of the following levels of organization are in order from least complex to most
complex?
A Organ system = organ = cell molecule
B Molecule cell = organ = organ system
C Cell = molecule = organ system = organ
D Organ = organ system = molecule = cell

Answers

Answer:

I believe the answer is B

Explanation:

maybe I get brainliest?

Living organisms include bacteria, protozoans, fungi, animals, and plants. What characteristics do all of these living things share? A. use sunlight for energy B. have nuclei with DNA C. made of one or more cells D. have DNA E. have cell walls F. reproduce​

Answers

Answer:

F

Explanation:

All those things can reproduce sexually or asexually

Answer: c

Explanation:

all contain cells

Define: tropical
Plzz help

Answers

of, typical of, or peculiar to the tropics

Answer:

when the air within a forest or and area where there are large bodies of water that evaporate is thick with precipitation.

Tropical usually makes people think of the amazon because the humidity is so high that you get hot very easily.

Explanation:

Why do we need the respiratory system?

Answers

Explanation:

Your respiratory system is the network of organ and tissues that help you breath.This system help your body absorb oxygen from the air so your organ can't work.It also clean waste gases ,such as carbon dioxide from your blood

Which of the following would change the allele frequencies of a population?
A)Lack of mutation in the DNA
B)Mating is random with no selection occurring
C)A population on an island remains isolated and no one leaves or moves on the island
D) All of the answer choices would change allele frequencies of a population.

Answers

Answer: option B.

B)Mating is random with no selection occurring

Explanation:

This will cause change in allele frequency because it's a genetic drift which is the change in the frequency gene variant that is common in a population due to random sampling or random mating. When this occur it lead to a change in percentage or incidence of gene variant in a population since there is random sampling without any selection.

Mating is random with no selection occurring, which would change the allele frequencies of a population.

What would increase the allele frequency in a population?

Natural selection can drive microevolution, or a difference in allele frequencies over time, with fitness-increasing alleles becoming more common in the population over generations.

Thus, option"B" mating is random with no selection occurring.

To learn more about allele frequency click here:

https://brainly.com/question/3405614

How do other organisms benefit from other biotic and abiotic things in tropical rainforest?

Answers

Answer:

All of the biotic factors are dependent upon the abiotic factors. ... Water, sunlight, air, and the soil (abiotic factors) create the conditions that allow rain forest vegetation (biotic factors) to live and grow. Organisms like monkeys, bats, and toucans eat the vegetation supported by the abiotic factors.

Explanation:

Biotic things are stuff like sunlight, air, dirt, etc. Plants and animals are abiotic. Abiotics benefit from biotics because they use the air, light, and dirt to function in everyday life.

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