b) How many species has the genus Homo had in the course of history and when did this
genus first arise? (2 points)

Answers

Answer 1

Answer: The genus Homo had three species, H. habilis, H. rudolfensis, and H. erectus, and the genus first arose about 2.5 million years ago

Explanation:


Related Questions

Which best explains why earthquakes sometimes occur in the same locations as mid-ocean ridges and rift valleys

Answers

Answer:

The reason why earthquakes sometimes occur in the same locations as mid-ocean ridges and rift valleys securely is:

Active tectonic plate edges are found at these locations.

Explanation:

Earthquakes are caused by the release of energy that occurs regularly at the edges of tectonic plates, which with their movement allow the release of said energy, which later translates into an earthquake. In simpler words, imagine that tectonic plates are pieces of a domino together next to each other trying not to leave space, each union between one piece and another is a possible focus of energy release if these pieces move, and if that happened, whatever was on them would feel an earthquake or tremor.

There are places that are much more prone to earthquakes than others, for example, San Andreas Fault, which is heard a lot by the great earthquake it could cause in California.

Answer:

Faults form because crust gets cracked when plates move apart along divergent plate boundaries.

Explanation:

Just took the quiz and got it right. Believe me on this.

Question 6 (1 point) ✓ Saved
Having 1 leader CAN help to get through a task and reduce arguing
True
False​

Answers

The answer is false. Group work is better than having leaders

Pronghorn antelopes are hoofed animals that eat grasses and live in large herds in the prairie
biome. In which one of these other biomes would an animal with similar adaptations live: taiga,
desert, savanna, or deciduous forest? Explain your answer.​

Answers

Most likely a savanna because there is a lot of space to roam around and plenty of grass to eat.

Joey eats strawberries for lunch. Explain how homeostasis is maintained in the endocrine systems once the fruit has entered Joey’s body.

Answers

Answer:

Explanations:

Homeostasis can be defined as the phenomenon whereby there is balance or stability within the internal and external environment of a cell or the body. The internal environment of the organism is kept constant during homeostasis. During this process there is adjustments in the

internal environment Because there is always change in the conditions inside and outside the cell. When the system of the body is able to adjust itself it's reffered to as homeostatic regulation.

The endocrine system which contains glands that is responsible for the secretion of hormones into the bloodstream play also vital part during Homeostasis, This is because hormones which are the chemical messaged effect some change cells in another part of the body. The endocrine system is responsible for the regulations of

metabolism as well as the development of some body cells and systems via feedback mechanisms, hormones such as

Thyrotropin-Releasing Hormone during Homeostasis. Therefore as Joey eats strawberries for lunch the hormones makes adjustment of muscle metabolism and also regulate fluid and ion concentration in the system or body

If your phenotype is free earlobes and free earlobes is dominant what is your genotype

Answers

If your phenotype is free earlobes which is dominant then your Genotype can be Ff or FF.

Answer:

ff

Explanation:

hope this help

describe the effects of lifestyle on the respiratory and circulatory systems

Answers

Answer:

Explanation:

Eating healthy foods, getting enough sleep, and being active every day can help keep your respiratory system, cardiovascular system and immune system strong. Getting enough exercise makes your lungs stronger and better at giving your body the oxygen it needs.

Carbon is stored in


A.Trees and other living things

B.Oceans

C.Underground in soil and fossil fuels

D.All are correct

Answers

Answer:

all are correct

Explanation:

Carbon is also found in the atmosphere where it's a part of carbon dioxide gas emitted when fossil fuels are burned and when living organisms breathe. It's in organic matter in the soil, and it's in rocks. But far and away the most carbon on Earth is stored in a surprising place: the ocean.

D. All are correct
Carbon is stored in all of the above

which substance is a reactant in photosynthesis

Answers

Answer:

carbon dioxide and water

Explanation:

Carbon dioxide and water are reactants to photosynthesis.

Which of the following statements are not true of carbohydrates?

A. Triglycerides are the most common type.
B. Monosacharrides, disacharrides, and polysacharrides are the most common types.
C. They are the most readily available source of energy for organisms.
D. Certain carbohydrates are enzymes or catalysts.

Answers

Answer:

this is very helpful to you

Explanation:

thank you

What is the physiological explanation for the negative effects of prolonged stress on health? Talk about stress hormones.
2. If your child believes in Santa Claus and you never tell them that he isn't real, why would they figure it out for themselves as they get older?
3. According to Piaget's theory of cognitive development what is "primary circular reaction?" Provide an example.
4. "My computer stopped working because it doesn't like me." "The sidewalk made me trip and scratch my knee." These statements illustrate how a young child thinks. According to the theory of cognitive development what is this an example of and why?
5. What are some reasons that a very bright child might not do well on an intelligence test (an IQ test)?
6. Explain the term "learning disability" in your own words.
7. The teacher refers a child to the psychologist because she continues to fail in all subjects. Before you begin to suspect a disability, what are the other factors that may affect the child's school performance?
8. Least restrictive environment, mainstreaming, inclusion: in special education what do these terms refer to? What are the advantages of mainstreaming a classified child?
9. Explain the difference between "functional death" and "brain death." How do these terms affect the decision to discontinue life support treatment?
10. What are some arguments against euthanasia?

Answers

Answer:

1. Hormones can be activated by stressful conditions.

2. Because this belief is associated with the innocence (lack of cognitive experience).

3. Babies start to associate movements and they acquire the ability to repeat these actions.

4. Because they have to develop the ability to deal with complex problems.

5. Due to the lack of suitable stimulation.

6. Learning disability is a disorder that affects the capacity to learn.

7. It is likely that she needs a more suitable stimulation to learn.

8. These terms represent an ideal environment that provides support to develop skills and abilities.

9. "functional death" refers to the death of the central nervous system, while "brain death" refers to the loss of cerebral functions.

10. Religious beliefs.

Which of the following groups of parrots is most likely in Hardy-Weinberg equilibrium?
A. A group with 50 DD parrots, 30 Dd parrots, and 20 dd parrots.
B. A group with 30 DD parrots, 40 Dd parrots, and 30 dd parrots.
C. A group with 25 DD parrots, 50 Dd parrots, and 25 dd parrots.
D. A group with 50 DD parrots, 25 Dd parrots, and 25 dd parrots.

Answers

Answer:

B. A group with 30 DD parrots, 40 Dd parrots, and 30 dd parrots.

A group with 30 DD parrots, 40 Dd parrots, and 30 dd parrots is most likely in Hardy-Weinberg equilibrium.

What do you mean by Hardy-Weinberg equilibrium?

The Hardy–Weinberg principle, also known as the Hardy–Weinberg equilibrium, model, theorem, or law, states that allele and genotype frequencies in a population will remain constant from generation to generation.

The Hardy-Weinberg equilibrium is a principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.

For populations in the Hardy-Weinberg equilibrium, the equation connects allele frequencies to genotype frequencies. This equation allows us to compare a population's genetic structure in reality over time to the expected genetic structure.

Learn more about Hardy-Weinberg equilibrium:

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i need some help plz​

Answers

Answer:

C. A sperm fused w/ an egg

Explanation:

This is the definition of a zygote.

A. is a blastula.

B. is simply a gamete found in females.

C. is the answer.

D. is the placenta.

Some laboratory mice are spotted, due to a dominant gene. Solid color is recessive. A solid color female mouse is mated to a spotted male. Both parents are homozygous. What percentage of mice should be found in the litter?

Answers

Answer: percentage of mice that will be spotted is 100%, and 0% chance of being solid colored.

Explanation:  First, homozygous means each parent have matching chromosomes (Like XX, instead of Xx)

Lets make a punnet square and show the data. We will use 'S' for spotted and 's' for solid

The punnet square shows that the percentage of mice that will be spotted is 100%, and 0% chance of being solid colored.

Hope this helps :)

The percentage of mice that will be spot-ted is 100%, and 0% chance of being solid colored.

Calculation of the percentage:

In the first time, h-o-m-o-z-y-g-o-u-s means each & every parent should have matching chromosomes (Like X-X, instead of X-x)

So based on this, we can say that The percentage of mice that will be spot-ted is 100%, and 0% chance of being solid colored.

in this way, the percentage is determined.

learn more about percentage here: https://brainly.com/question/14625849

What are the sources of coastal pollution?

Answers

Answer:

Point sources include combined sewer overflows, concentrated animal feeding operations, sanitary sewer overflows, storm water, oil spills, industrial discharges; discharge from boats, and dumping of ballast water from ships.

Explanation:

how is mRNA processed

Answers

Answer:

Eukaryotic mRNA precursors are processed by 5′ capping, 3′ cleavage and polyadenylation, and RNA splicing to remove introns before being transported to the cytoplasm

Explanation:

need help with this​

Answers

What are the question choices ?

If the food source is affecting the buffalo population, what do you predict the graph of the food source would look like? Either draw a graph or write a prediction.

Answers

Answer:

I think the number of buffalo should reduced,for the grass to grow better and act as the food for buffalo

If the food source is affecting the buffalo population, the number of buffaloes in the area should decline.

What do you mean by Population?

A population may be defined as the number of individuals of the same species in a particular area at a given time.

Anything that affects the population of any species, it definitely reduces the number of specific species in a particular area. Then the affecting resource has the chance to spread in a much better way.

Therefore, if the food source is affecting the buffalo population, the number of buffaloes in the area should decline.

To learn more about Population, refer to the link;

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According to the theory of natural selection, why are some
individuals more likely than others to survive and reproduce?
A
Some individuals pass on to their offspring new
characteristics they have acquired during their lifetimes.
B
Some individuals are better adapted to exist in their
environment than others are.
с
Some individuals do not pass on to their offspring new
characteristics they have acquired during their lifetimes.
Some individuals tend to produce fewer offspring than others
in the same environment.

Answers

Answer:

B. some individuals are better adapted to exist in their enviornment than others are

Explanation:

Explain in detail the life cycle of the metamorphosis of amphibians.

Answers

Amphibians, like frogs and newts, have a slightly more complicated life cycle. They undergo a metamorphosis (a big change): they are born (either alive from their mother or hatched from eggs)

1. What do you call metamorphic rock formed from igneous rock?
2. What do you call metamorphic rock formed from sedimentary rock?

Answers

Explanation:

1.gneiss metamorphic rock formed igeous rock

2.called met

Answers:

1. Gneiss
2. met

Hope this helped !

Which of the following is a nonrenewable resource?
A. Solar
O B. Biomass
O C. Petroleum
D. Hydropower

Answers

Answer:

C.

Explanation:

answer is c) petroleum

Comparing the skeletons of which of the following fish would
best show the evolution of a fish species?
a male fish and a female fish that could produce offspring
the same fish just before it received a cut and after it healed
a fish that lived recently and a fish that lived a long time ago
the same fish just after it hatched and when it was full-grown

Answers

Answer:

C. a fish that lived recently and a fish that lived a long time ago

Good luck with it :)

The deep ocean gets carbon from?-

Answers

Answer:

Explanation:

Carbon dioxide from the atmosphere dissolves in the surface waters of the ocean. ... Photosynthesis by tiny marine plants (phytoplankton) in the sunlit surface waters turns the carbon into organic matter. Many organisms use carbon to make calcium carbonate, a building material of shells and skeletons

Answer:

Carbon from the atmosphere enters the ocean depths in areas of deep water formation in the North Atlantic and offshore of the Antarctic Peninsula. Where deep currents rise towards the surface, they can release “fossil” carbon dioxide stored centuries ago.

Explanation:

A species is endangered if it_____
no longer exists anywhere on earth
is in danger of becoming extinct
is not native the environment
has high genetic diversity

Answers

Answer:

is in danger of becoming extinct

Is in danger of becoming extinct

Which feature separates watersheds?
A.) basins
B.)bays
C.)ridges
D. )rivers

Answers

Answer:

c

Explanation:

C.) Ridges are the feature that separates watersheds.

What is watershed ?

A watershed is a region or area of land that collects and drains water into a particular river, stream, or other body of water.

Ridges or high points of land are critical in separating watersheds because they provide the boundary or border between two adjacent watersheds. When rain falls or snow melts, the water will flow downhill towards the closest body of water.

However, if that body of water is separated from another by a ridge, the water will flow down opposite sides of the ridge, into different watersheds.

Ridges are created by geologic processes such as tectonic uplift or erosion, and can vary in size and height. In some cases, a single ridge can divide a large drainage basin into two or more smaller ones, each with its own unique set of characteristics and ecosystems.

The boundary or border of a watershed is formed by a ridge or high point of land that separates one watershed from another. Water that falls on one side of the ridge flows into one watershed, while water that falls on the other side of the ridge flows into a different watershed.

Learn more about watersheds at:

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It is most commonly believed that India or China has the highest population density in the
world, however this is not true, what country holds that honor?

Answers

Answer:

Monaco

Explanation:

Hope this helped :)

Why did Gregor Mendel use peas in his experimentsGregor Mendel’s research formed the basis of the field of

Answers

Answer:

Peas have characteristics that have two forms. Scientists often use fruit flies as a method to test hypotheses about human genes.

Explanation:

HELP PLS!!!!!!!!!!!!

A good environmental decision _____.


has no ecological costs


discounts the environmental costs


should have more benefits than costs


has only environmental benefits

ILL GIVE 40 POINTS TO WHOME OVER IS RIGHT





HELPPPPPPPPPPPPPP MEEEEEEEEEEEEEEEEEEEEEEE

Answers

C. I believe this is correct

This was simulation. What are some variables that this peppered moths simulation does not address?

Answers

Answer:

The simulation only shows how a population can change overtime in response to the changes in the environment. During the industrial revolution, one particular phenotype of moths had an advantage over the other and hence, was subjected to natural selection. What this simulation does not tell us is the causality and correlation aspect of the change that occurs in the moths. Correlation does not equal causation, and the simulation does not shed any light on these variables in this case.

Explanation:

Hope that answers the question, have a great day!

HELP ASAP!!!!

Describe a habitat in ur community that would support non vascular plant!!!!

Answers

Moist soils, Damp walls and mud regions where the water is not in limiting conditions are best suited for the growth of non vascular plants as they can not absorb and transport water to taller aerial organs.

would really appreciate a brainliest! Hope this helped! =)

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Need help solving this Mr. Bryan's class has 60 students. 1 of the students stay for tutoring on Monday. If Mr. Bryan equally divides the students that stay4for tutoring into 5 groups, how many students are in each group? Maintaining a competitive business environment is an important role of ________ in the economy.. corporationsB. governmentC. the banking systemD. colleges and universities Demand for consumer goods is necessarily variable. Forecasting the demand for consumer goods is an important business activity, as all businesses have to plan ahead. Manufacturer of consumer goods has been studying the demand for one of their products and the level of demand is given in the following stem and leaf plot, where stem unit is 100 and leaf unit is 10. Stem Leaf 1 1, 2, 3, 4.5, 5, 6, 7, 7, 9, 9.5 2 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 4, 5, 7, 9 3 0, 0, 0, 2, 8 4 5 0 6 7 8 0 9 10 11 12 0 The outer fences are ___________. The radius of a circle is 10 m. Which choice is best represents the area of the circle?314 square meters78.5 square meters1256 square meters62.8 square meters Which of these are the correct base pairs in DNA?A.adenine and guaninecytosine and thymineB.cytosine and guanineadenine and uracilC.adenine and thyminecytosine and guanineD.adenine and uracilthymine and cytosine (1 point)2. Which of the following shows the correct parenthetical citation of a quotation from page 75 of a bookcalled New York City: The Rough Guide by Martin Dunford and Jack Holland?(Dunford and Holland 75)(Dunford 75)(New York City, p. 75)("New York City" 75) Blood has traveled from the heart to the toes. Which describes the next stepof the circulation process?A. The blood goes back to the heart to get oxygen.B. The blood releases oxygen on the way back to the heart.C. The blood goes through the liver to get oxygen.D. The blood travels to the lungs to get oxygen. Sulfuric acid (H2SO4) has a molar mass of 98.1 g/mol. How many oxygen atoms are found in 75.0 g of H2SO4? A. 1.15 10^23 B. 1.84 10^24 C. 4.61 10^23 D. 7.87 10^23 If an angle is supplementary and one measures 70 what is the measure if the other angle? Everybody in the United States has heard the song about the star-spangled banner. Nearly everybody has sung it. It was written by Francis Scott Key.Key was a young lawyer. In the War of 1812 he fought with the American army. The British landed soldiers in Maryland. At Bladensburg they fought and beat the Americans. Key was in this battle on the American side.After the battle the British army took Washington, and burned the public buildings. Key had a friend who was taken prisoner by the British. He was on one of the British ships. Key went to the ships with a flag of truce. A flag of truce is a white flag. It is carried in war when one side sends a message to the other.When Key got to the British ships, they were sailing to Baltimore. They were going to try to take Baltimore. The British commander would not let Key go back. He was afraid that he would let the Americans know where the ships were going.Key was kept a kind of prisoner while the ships attacked Baltimore. The ships tried to take the city by firing at it from the water. The British army tried to take the city on the land side.The ships did their worst firing at night. They tried to take the little fort near the city.Key could see the battle. He watched the little fort. He was afraid that the men in it would give up. He was afraid that the fort would be broken down by the cannon balls.The British fired bomb-shells and rockets at the fort. When these burst, they made a light. By this light Key could see that the little fort was still standing. He could see the flag still waving over it. He tells this in his song in these words:"And the rocket's red glare, the bombs bursting in airGave proof through the night that our flag was still there."But after many hours of fighting the British became discouraged. They found that they could not take the city. The ships almost ceased to fire.Key did not know whether the fort had been knocked down or not. He could not see whether the flag was still flying or not. He thought that the Americans might have given up. He felt what he wrote in the song:"Oh! say, does that star-spangled banner yet waveO'er the land of the free, and the home of the brave?"When the break of day came, Key looked toward the fort. It was still standing. There was a flag flying over it. It grew lighter. He could see that it was the American flag. His feelings are told in two lines of the song:"Tis the star spangled banner, oh, long may it waveO'er the land of the free, and the home of the brave!"Key was full of joy. He took an old letter from his pocket. The back of this letter had no writing on it. Here he wrote the song about the star-spangled banner.Which is the best summary statement for this passage?A)Francis Scott Key was kept as a kind of prisoner on a British ship bombing Baltimore.B)Francis Scott Key was a young lawyer who fought in the War of 1812 with the American army.C)The British soldiers became discouraged when they were unable to take the city of Baltimore.D)Francis Scott Key used the battle for Baltimore as inspiration for writing "The Star-Spangled Banner. Who were a group of citizen-soldiers? Discuss the narrators tragicomic treatment of akaky in the opening pages What challenges arise when trying to protect the environment? Select four options. A)expensive clean energy startup B)costs threat to the livelihood of many citizens. C) negative effect on future crop yieldsD)expensive to monitor fishing and tourism industries more land available for farming Service Department Charges In divisional income statements prepared for Demopolis Company, the Payroll Department costs are charged back to user divisions on the basis of the number of payroll distributions, and the Purchasing Department costs are charged back on the basis of the number of purchase requisitions. The Payroll Department had expenses of $64,560, and the Purchasing Department had expenses of $40,000 for the year. The following annual data for Residential, Commercial, and Government Contract divisions were obtained from corporate records: ResidentialCommercialGovernment Contract Sales$2,000,000 $3,250,000 $2,900,000 Number of employees: Weekly payroll (52 weeks per year)400 250 150 Monthly payroll80 30 10 Number of purchase requisitions per year7,500 3,000 2,000 a. Determine the total amount of payroll checks and purchase requisitions processed per year by the company and each division. Can yall answer this or not !? 9.A game show producer asked 100 randomly selected adults, Have you ever bungee jumped? Of the adults surveyed, 14 said Yes! Is there convincing statistical evidence that the true proportion of all adults that have bungee jumped is more than 10%?(A)No, because the difference between the sample proportion and the population proportion is only 0.04, which is not greater than 0.05.(B)No, because the probability of observing a sample proportion at least as large as 0.14, if the population proportion is 0.10, is greater than 0.05.(C)Yes, because the probability of observing a sample proportion at least as large as 0.14, if the population proportion is 0.10, is greater than 0.05.(D)Yes, because the probability of observing a sample proportion at least as large as 0.14, if the population proportion is 0.10, is less than 0.05.(E)Yes, because the difference between the sample proportion and the population proportion is 0.04, which is less than 0.05. Implement the function get_stats The function get_stats calculates statistics on a sample of values. It does the following: its input parameter is a csv string a csv (comma separated values) string contains a list of numbers (the sample) return a tuple that has 3 values: (n, stdev, mean) tuple[0] is the number of items in the sample tuple[1] is the standard deviation of the sample tuple[2] is the mean of the sample what is the compound of libr Ashley presents a plan that reveals the height and elevation of doors and windows. It also reveals the placement of staiof presentation drawing did she use?A.floor planB.site plan C.elevation planD.section plan