PLEASE HELP WILL MARK BRAINLIEST
Which best describes eras and periods?

A. Eras have a smaller time span than periods.
B. Eras and periods are independent of each other.
C. Eras and periods both appear at the start of the Cambrian period.
D. Eras were more recently established on the time scale than periods.

Answers

Answer 1

Answer:

B or C i think

Explanation:

because Eons are broken into eras and then into periods.  Its not A tho

Answer 2

Answer:  b

Explanation:


Related Questions

How does the urban and natural water cycle compare?

Answers

Answer:

Explanation:

he natural water cycle is a continuing process of evaporation, condensation, precipitation and groundwater (Figure 1). ... The urban water cycle (Figure 2) shows the consequences of increased development. More development and more concrete means less infiltration of rainwater into the soil, and more run off.

~Hope it helps! And stay safe~

Both the urban and natural water cycles have a lot of differences in their properties and occurrence. This is because due to the presence of artificial surroundings in urban areas.

What do you mean by the water cycle?

The water cycle may be defined as the continuous movement of water throughout the atmosphere. It involves all the processes and stages of water.

Due to the development in the urban areas, the natural water cycle gets affected. The natural water cycle deals with evaporation, condensation, sublimation, etc. but the urban water cycle has concrete walls, infertile soil, and a ruptured environment where there is less or no rainfall at all.

Therefore, Both the urban and natural water cycles have a lot of differences in their properties and occurrence.

To learn more about the Water cycle, refer to the link:

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True or False: Humans have radial symmetry

Answers

Answer:

false

Explanation:

not everyone has radial symmetry

False human bodies are not perfectly symmetrical

When meiosis is complete what has been produced

Answers

Answer:

Sex cells or gametes (eggs in females, sperm in male) are produced after meiosis is completed.

Explanation:

During meiosis one cell? divides twice to form four daughter cells. These four daughter cells only have half the number of chromosomes? of the parent cell – they are haploid. Meiosis produces our sex cells or gametes? (eggs in females and sperm in males).

hope this helps :)

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how does a scientist answer a scientific question?

Answers

Observing and measuring (A)

Read the following summary, which describes a body process. Then, answer the question.

Blood enters the right side of the heart and travels to the lungs. There, the lungs eliminate carbon dioxide and exchange it for more oxygen. The oxygen-rich blood enters the left side of the heart. Then, arteries carry blood away from the heart.

What process is being described?

Group of answer choices

Circulation

Excretion

Immune response

Respiration

Answers

Answer:circulation

Explanation:circulatory system

effects of corona virus in the respiratory system and circulatory system ?

Answers

Within 2-14 days, your immune system may respond with symptoms including: fever, a cough, shortness of breath, trouble breathing, fatigue, chills sometimes with shaking, body aches, headache, a sore throat, loss of taste and or smell, nausea and possibly diarrhea.

During what epoch did India collide with Asia? When did Antartica drift over the South Pole? Estimate the date in millions of years ( Ma ).​

Answers

Answer:

India Collided with Asia and Antarctica drifted over the South pole during the Oligocene Epoch, about 23.0

million years ago (Ma).

Paige turns on an electric space heater in the center of her bedroom. The coils glow, and the room becomes warmer. How is heat reaching the corners of Paige's bedroom?

Answers

Think of it this way. Osmosis occurs when water flows to a different side given its a membrane or not. This is because it flows to a less dense area to reach equilibrium between the two sides. Heat is very similar. It will try to spread to places where there is not as much heat. Keeping the laws of heat travels up, the heat from the coils will reach the ends. We call this "Thermal Equilibrium"

Can someone answer this please.

Answers

Answer:

Humans first evolved in Africa, and much of human evolution occurred on that continent. The fossils of early humans who lived between 6 and 2 million years ago come entirely from Africa. Most scientists currently recognize some 15 to 20 different species of early humans.The first true primates evolved by 55 million years ago or a bit earlier, near the beginning of the Eocene Epoch. Their fossils have been found in North America, Europe, and Asia. They looked different from the primates today.

hope this is what you were looking for!

List three particles found in blood plasma and give their main purpose.

Answers

Answer:

Blood plasma is a 'yellowish liquid' component of blood that holds the blood cells in whole blood in suspension. It is the liquid part of the blood that carries cells and proteins throughout the body. It makes up about 55% of the body's total blood volume. It is the intravascular fluid part of extracellular fluid. It is mostly water, and contains important dissolved proteins, glucose, clotting factors, electrolytes, hormones, carbon dioxide, and oxygen. It plays a vital role in an intravascular osmotic effect that keeps electrolyte concentration balanced and protects the body from infection and other blood disorders.

All metabolism of a cell occurs in the ___________ of the cell, which is made up mostly of ___________.

Answers

Answer:

Mitochondria

Explanation:

Is there a connection between intensity of UV radiation and skin color?

Answers

Answer:

Explanation:

Sun exposure which also includes its intensity is responsible for detrimental damage to the skin ranging from sunburn, etc and skin cancer.They also aid in the accumulation of DNA lesions which are unable to be repaired by the body systems which are distributed throughout the whole epidermal layers and the uppermost dermal cells in light, intermediate and tanned skin while they were restricted to suprabasal epidermal layers in brown or dark skin in interaction with the individual's genetics.

To solve this problem of damage to the skin, a way to do this was to evolve skin that was dark to protect against the sun's more damaging rays. Melanin, the skin's brown pigment, is a natural sunscreen that protects tropical peoples from the many harmful effects of ultraviolet (UV) rays as the sun rays is a lot high in these areas.

Select all the correct answers.
Nathan is an ecologist. He’s studying the effect of secondary consumers on primary consumers. His current research focuses on a population of blue jays and crows. They eat caterpillars and mice. If the number of blue jays increases, what are the likely effects on other populations?
The number of crows will increase.
The number of mice will decrease.
The number of mice will remain the same.
The number of caterpillars will decrease.

Answers

Answer:

I would say that "The number of mice will decrease.' is a valid answer choice along with "The number of caterpillars will decrease."

Explanation:

The more predators there is the less prey will be as the continue to eat.

Answer:

the number of mice will decrease

Explanation:

According to the theory of natural selection, organisms that possess variations best suited for an environment are
a. more likely to survive and reproduce
b. less likely to survive and reproduce
c. without an advantage compared to other organisms in the population
d. more likely to go extinct

Answers

Answer:

The answer is A

Explanation:

Since their variations are best suited for the environment, they have a higher chance of surviving.

Up to this point, did you notice any differences between the development of male and
female gametes?
Explain​

Answers

Both require different hormones that start the production of gametes for example oestrogen is produced in women and testosterone is produced in males

Both male and female gametes are produced by different organs and in different sizes.

The main difference between male and female gametes is that male gametes which are known as sperm cells are produced in large numbers by the male reproductive organs whereas female gametes are called egg cells which are produced single at a time by the female reproductive organs.

Both male and female gametes are formed by meiosis type cell division. The female gamete is a large in size and motile while the male gamete is small in size and also motile so we can conclude that both gametes are produced by different organs, numbers and sizes.

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How does climate affect where people live?

Answers

Answer:

People who like colder weather will live in colder areas, and vice versa

Explanation:

Describe what the observations imply about how starlings are affected by flocking behavior in the wild and explain how evidence suggests that flocking behavior provides an advantage to starlings.

Answers

Answer:

Explanation:

Starling is a bird from the family sturnidea. It originated from Europes and Asia from where it introduced to other part of the world. They lives in the wild.

Starling birds moves in group or tight flock from a place the other. They usually form a flock called murmuration where they move together in group following each other to avoid predation.

Starling have been able to survive on the wild with this behaviour. They stir above the average height of their neighbor in a coordinated manner preventing them from being caught by preys.

Which statements explain what the fossil record indicates?

Answers

Answer:

the fossil record provides evidence about the history of life on earth.it also shows how different groups of organisms,including species, have changed

Explanation:

Answer:

The answer is the amount of water on Earth has decreased over time.

Explanation:



What is the mass number of an ion with 106 electrons, 157 neutrons, and a +1 charge?

The answer is NOT 126

Answers

#electrons equal #protons = 106
Plus 1 charge => m protons = 106 + 1 = 107
Mass number: 107 + 157 = 264 g/mol

The ion has 106 electrons and 157 neutrons and +1 charge.

This means the original atom has lost one electron originally there are 107 electrons in the neutral atom which shows that there are also 107 protons. 264 is the mass number.

electrons=protons = 107

Mass number: 107 + 157 = 264 g/mol

What are the components of an atom ?

The atomic structure consist of three particles proton, neutron and electron.

Protons are the positively charged particles present in the nucleus of the atom.

The charge of a proton is equal to the charge of an electron to maintain the balance in the atom.

Neutrons are neutral charged and dense particle present in the nucleus of atom.   Hydrogen is the only element that does not have a neutron.

Electron is the smallest particle revolves around the nucleus of the atom.

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There are 25 elements found in living things. How many of these elements are found in some organisms but not all?​

Answers

Answer:

Six

Explanation:

All living things have six basic elements in common: carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur, abbreviated as CHNOPS.

The number elements that are found in some organisms but not all is 19 in number. This is further explained below.

What are elements?

Generally, elements are simply defined as compounds that cannot be broken down into smaller chemicals using standard chemical procedures.

In conclusion, Some of the elements found in living things are

Oxygen (O)Carbon (C)Hydrogen (H)Nitrogen (N)

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Wich action would most likely increase the amount of carbon in the environment

Answers

Answer:

Cutting down trees

Explanation:

Of course this is just my opinion, but stopping the production of oxygen can greatly effect the carbon and oxygen ratio thus, increasing the level of carbon in the air. There are many different ways for the increase of carbon to take place but I think that cutting down trees has a major effect.

Burning fossil fuels will increase carbon emissions

This type of reproduction in plants is centered around the flower's ovum
and pollen fusing together:​

Answers

Answer:

sexual reproduction

Explanation:

The type of reproduction in which the ovum and the pollen of a flower fuse together is refer to as sexual reproduction.

The ovum of a flower is equivalent to the female reproductive part while the pollen is equivalent to the male's reproductive part. During fertilization, the female reproductive part (the ovum) fuses with the male's reproductive part (the pollen) to produce a zygote.

Who Knows The Answer ?

Answers

Answer: Water consumption rises because suburban communities use  more water.

Explanation:

Urban sprawl can be described as a wide growth of the urban areas without proper planning. When such a large population starts to live in an urban area then the water consumption would be more. Even the construction process to support the urban sprawl will require adequate amounts of water. Hence, option C is correct.

Other options like option D id false because the usage of more water will lead to an increase in water consumption. The water consumption will not drop.

Why does tempreture increase when the amount of carbon dioxide or methane in the earth system increase?

Answers

Carbon dioxide controls the amount of water vapor in the atmosphere and thus the size of the greenhouse effect. ... This means that Earth's temperature will increase at least another 0.6 degrees Celsius (1 degree Fahrenheit) because of carbon dioxide already in the atmosphere

What are some Characteristics of the Golden eagle?

Answers

Answer:

Golden Eagles have a square tail, fully feathered legs and large talons. Females are much larger than males and they both have the same coloured plumage. Golden Eagles are very agile in flight and they can remain in the air for hours. They have a graceful, soaring flight with their wingtips being slightly upturned.

Explanation: Golden Eagles have a square tail, fully feathered legs and large talons. Females are much larger than males and they both have the same coloured plumage. Golden Eagles are very agile in flight and they can remain in the air for hours. They have a graceful, soaring flight with their wingtips being slightly upturned.

Answer:

Golden eagles are very Graceful, in appearance.  In flight golden eagles are known to be very agile. This characteristic “Agile”, gives them the ability to think quickly. This makes golden eagles smart.

Explanation:

Which feature increases the absorption of glucose in the small intestine

Answers

Answer:

The correct answer is villi.

Explanation:

The carbohydrates consumed by human beings are further dissociated into its mono forms, that is, fructose, glucose, and galactose. Of these monosaccharides, about 80% is glucose, which gets absorbed with the assistance of absorptive cells in the small intestine. In the walls of the small intestine, the food after digestion is passed into the blood vessels via the process of diffusion.  

The mucosa or the inner wall of the small intestine is enveloped by finger-like tissues known as villi that further comprise microscopic finger-like outcrops called microvilli. These villi and microvilli enhances absorption of nutrients as they increase the surface area of the small intestine. Thus, the absorption of glucose within the small intestine is enhanced by the presence of villi.  

1. In Japanese four o'clock flowers, color is inherited by genes that show incomplete dominance. In such flowers, a cross between a homozygous red flower and a homozygous white flower will always result in pink flowers.

Answers

Answer:

Explanation:

Incomplete dominance occur when two allele expresses itself in the phenotype of an organism.

Its a situation where by an allele is not dominant over another other in an heterozygous condition but it gives a blend of the two allele in the phenotype of the offspring.

Example is the phenotype of a 4'o clock plant that gives pink flower when a red flower is crossed with white flower.

Why Does Evolution Matter Now?
Why is the theory of evolution an important theory in for
doctors and the field of medicine? How does the theory affect the way illnesses and treatments are approached?​

Answers

Answer:

Like all biological systems, both disease-causing organisms and their victims evolve. Understanding evolution can make a big difference in how we treat disease. ... And considering the basic processes of evolution can help us understand the roots of genetic diseases

Hope it helps :)

what type of metal is copper

Answers

Answer:

Copper

Explanation:Copper is a metal.

Answer:

Symbol : CU

NUmber : 29

Explanation:

how many teeth do yellow perch have on their tongue

Answers

Answer: it could be around 7 or 8

Explanation:Hope this helps

Other Questions
Answer quick for brainliest! What does jimmy carter say he will do if he is elected president When Fe2O3(s) reacts with H2(g) to form Fe(s) and H2O(g), 98.8 kJ of energy are absorbed for each mole of Fe2O3(s) that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation. Note that the answer box for the energy term is case sensitive. Use the SMALLEST INTEGER coefficients possible and put the energy term in the last box on the appropriate side of the equation. If a box is not needed, leave it blank. Will mark brainliest for whoever answers What is the mass number of the missing daughter nuclei? Determine which consecutive integers do not have a real zero of f(x) = x3 + 5x2 - x - 6 between them.a.(-6,-5)c. (-2, -1)b. (-5, 4)d. (1,2) On January 1, 2012, Browning Corporation had 75,000 shares of $1 par value common stock issued and outstanding. During the year, the following transactions occurred:Mar. 1 Issued 60,000 shares of common stock for $675,000June 1 Declared a cash dividend of $2.00 per share to stockholders of record on June 15June 30 Paid the $2.00 cash dividendDec. 1 Purchased 5,000 shares of common stock for the treasury for $18 per shareDec. 15 Declared a cash dividend on outstanding shares of $2.50 per share to stockholders of record on December 31Net income for 2012 amounted to $951,000.InstructionsPrepare journal entries to record the above transactions. Which feature should go in the "Shared" column?Select one:A. establishes a zoning boardB. guarantees individual freedomsC. requires a balanced budgetD. creates property taxes 1. __ are located in __ .2. and ____ are reactants.3. __ is made from __ .4. produces sugar and releases ___ .Choices:A. Carbon dioxideB. CellsC. CelluloseD. ChloroplastsE. OxygenF. photosynthesisG. SugarH. Water solve similar triangles Tyrone weighed 1 box of macaroni on a scale and found it weighed 0.6 pounds. What could Tyrone do to find the total weight of 100 boxes of macaroni? why was the hand cream used as a separating agent when the flubber was handled Show that if x, y, z are integers such that x^3+5y^3 = 25z^3, then x = y = 0. Which bug populations did survive during the air pollution? What kinds of artistic behaviors are needed to create a unique and meaningful artwork? How many seconds are required to make a left turn and join traffic? A line passes through the point (1,-3) and has a slope of -7. Find the equation of the line. Why do globalization and increasing interdependence pose risks to the globaleconomy?O A. Global production cannot be as efficient as national production.B. Disruptions in one place have effects everywhere.C. There is no consistent set of international regulations.D. Worldwide competition leads to market concentration.SUBMITw< PREVIOUS (1) There are many examples of grand architecture in the world. (2) Some of the most impressive are buildings of the ancient city called Petra in Jordan. (3) Petra is the Greek word for "rock." (4) The early inhabitants of Petrathe Nabataeansdid not use wood or brick to make the structures, but instead, they carved them right out of the desert sandstone cliffs. (5) Two thousand years ago, Petra was an important center of activity where caravans of travelers would pass through on their way to trade goods in other regions. (6) Their power and riches can still be seen today in the remains of their city. (7) Although Petra was built in a rugged, dry desert, the Nabataeans made wise plans for collecting and storing water. (8) This water system was made of cisterns, or reservoirs, that held water and channels that directed water from one place to another. (9) After thriving for about 1,000 years, Petra began to decline. (10) The trade routes that had once gone through the city were changed to go toward the sea. (11) In addition, an earthquake devastated the area. (12) The ruins of the city were rediscovered in the 1800s by a European traveler who disguised himself as a local Bedouin, or local Middle Eastern person, to find the remote location. (13) Today, modern travelers can visit Petra and see its majesty in person; tours are available by foot, donkey, or camel. (14) Much of Petra remains to be seen; archaeologists have uncovered only 15 percent of it. (15) The rest of this city is still "lost" or underground. Where would the following sentence best fit in the passage? The Nabataeans themselves were intelligent and wealthy traders. A. after sentence 5 B. after sentence 14 C. after sentence 1 D. after sentence 12 Which of the following statements is most correct? a. Because taxes on long-term capital gains are not paid until the gain is realized, investors must pay the top individual tax rate on that gain. b. Retained earnings, as reported on the balance sheet, represents the amount of cash a company has available to pay out as dividends to shareholders. c. 70% of the dividends received by corporations is excluded from taxable income. d. 70% of the interest received by corporations is excluded from taxable income. e. The corporate tax system favors equity financing, as dividends paid are deductible from corporate taxes.