Which natural events likely caused Earth's past mass extinctions?

Answers

Answer 1
In my opinion

Mass extinctions happen because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes. One famous mass extinction event is the one that lead to the extinction of dinosaurs, 65 million years ago.
I hope it’s help
Answer 2

Answer:

Its because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes.

Explanation:


Related Questions

The process of nitrification is
carried out by what group of
organisms?
A. producers
B. animals
C. bacteria

Answers

C) Bacteria is the correct option

A group of students burned three different kinds of food and
collected data.
Food
sample
Mass
Starting
temp.
Ending
temp.
1
100 g
20°C
24°C
2
50 g
20°C
30°C
3
110 g
20°C
27°C
6a. How many calories were contained in each piece of food? Remember:
cal = m XAT

Answers

Answer:

sample

Mass

Starting

temp.

Your Hot Wheels car travels 120 cm in 1.34 seconds. What is its SPEED?
0.01 cm/s
67.55 cm/s
89.55 cm/s
160.80 cm/s

Answers

Answer:

c) 89.55 cm/s

Explanation:

in this situation you have to divide to find the speed-

120/1.34 = 89.55223880...

closest answer is c

or rounded

89.55

hope this helps.

Which labels correctly complete the diagram

Answers

Answer:

The answer is the first one, i hope it helps

Explanation:

Reread the first and second paragraphs. Number the events below in order from first to last.
___ Local business owners and movie studios began working together to bring films to local theaters.
___ Early movie theaters started opening in the early 1900s.
___ The first movies were made in the late 1800s.

Answers

Movies made in 1800s
Movie theaters open in the 1900s
Business owners team up

How does the movie “The Martian” related to a biology concept?

Answers

Answer:

Because of the garden that the dude made on mars.

Explanation:

The dude grew plants from his crew's poop and made a little tent with airtight seals, and as he said, once you grow something, you colonize it.

Which of these describes a nebula

Answers

Answer:

A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova. Other nebulae are regions where new stars are beginning to form. For this reason, some nebulae are called "star nurseries."

Explanation:

The amount of light, pressure, and temperature are examples of?

Answers

Explanation:

The answer is No. You know light from Stars travel in cold temperature of space and different pressure as they enter our planet after travelling many light year to reach us at the same the speed.

Light bends when entering a different medium(refraction). Even if the medium is same and the temperature is different it will get bend. As the 2 different temperature air behave like 2 mediums (Due to distribution of atoms ).

But light doesn't’ bend by heating or by putting pressure on it.

Please Help
Which resource is renewable?
A. Wind
B. Diamonds
C. Aluminum
D. Coal

Answers

Answer:

A. Wind

wind is a renewable resource because there is unlimited supply of it.

Explanation:

What signals your body to breathe out, or exhale. We learning about the respiratory system

Answers

Answer: Your brain constantly gets signals from your body which detect the amount of oxygen and carbon dioxide in your blood. Your brain will send signals to the muscles involved in breathing and adjust your breathing rate depending on how active you are.

HOPE THIS HELPED HAVE A WONDERFULL DAY!

4. A bacterium is discovered with new mutated form of isocitrate dehydrogenase that catalyzes the same reaction but produces hydrogen gas instead of NADH. a. Write a balanced equation for the new reaction. b. What affect does this mutation have on the amount of ATP produced from one glucose molecule

Answers

Isocitrate + NAD+ -> a-ketoglutarate + CO2 + H2

The amount of ATP produced from one molecule of glucose will decrease because NADH is no longer produced in the isocitrate dehydrogenase reaction. Without generation of this high energy electron carrier there will be less electrons from one molecule of glucose that are transferred to and through the electron transport chain. So there will be less protons (H+ ions) pumped into the intermembrane space. So there will be less of a H+ ion gradient across the inner mitochondrial membrane to drive the synthesis of ATP by ATP synthase.

A bacterium is discovered with a new mutated form of isocitrate dehydrogenase that catalyzes the same reaction but makes H₂; the reactant is isocitrate, and the product is alpha-ketoglutarate. As the proton count decreases, less ATP is produced.

What is the importance of the proton gradient in energy production?

The proton gradient is formed during the electron transfer chain (ETC) by using all the NADH and FADH₂ that are derived from the glycolysis and kreb cycle. NADH and FADH₂, for example, are two compounds that travel through the different complexes to create the proton gradient, which later produces ATP; however, when H₂ is produced instead of NADH, less of a proton gradient is formed, and thus less ATP is produced. The equation is isocitrate+ NAD+ → alpha-ketoglutarate +CO₂ + H+

Hence, the reaction is composed of substrates isocitrate, NAD+, and products alpha-ketoglutarate, CO₂, and a proton (H+), which will be formed with significantly less ATP than the normal ATP produced from the one glucose.

Learn more about the proton gradient here.

https://brainly.com/question/28046848

#SPJ2

what are the tropical rainforest dominant plants

Answers

Answer:

Orchids, Queen’s Tears, Lilies, Poinciana, Torch Ginger, Heliconia and Bromeliads. Orchids. This type of rainforest flowers grows in humid environments such is the Amazon rainforest. This type of rainforest flower is most frequently found rainforest flower in tropical rainforests.

Explanation:

What is the difference between osmosis and diffusion:)

Answers

Osmosis is the movement of solvent particles
Diffusion is the movement of particles from an area of higher concentration to lower concentration
Osmosis is the movement of water molecules through the cell and Diffusion is the movement of molecules, such as oxygen, in and out of a cell

Help me lable cells pls? Prokaryote and Eukaryote?​

Answers

The diagram is not clear but I will only try to answer what I can see

A is the pilus and it help the bacteria to attach itself to a specific surfaces or to other cells
B is the cytoplasm and it protect the cell from damages and also store molecules required for cellular processes
C is the plasma membrane they keep toxic substance out of the cell and regulate the in and out of specific molecule
K is the chloroplast and it store chlorophyll which is responsible for the color pigment
M is the large vacoule, and it stores waste , water and nutrients in the cell

I can’t see L well , that is why am unable to answer it
Thank you

Two protein kinases, PK1 and PK2, work sequentially in an intracellular signaling pathway. You create cells that contain inactivating mutations in the genes that encode either PK1 or PK2 and find that these cells no longer respond to a particular extracellular signal. You also create cells containing a version of PK1 that is permanently active and find that the cells behave as though they are receiving the signal even when the signal is not present. When you introduce the permanently active version of PK1 into cells that have an inactivating mutation in PK2, you find that these cells also behave as though they are receiving the signal even when no signal is present.
Answer the following question in the space give.
A. From these results, does PK1 activate PK2, or does PK2 activate PK1? Explain your answer.

Answers

Answer:

The answer is "PK1 activates PK2"

Explanation:

All enzymes were required again for the transmission of a signal. If Pk1 is continuously active, pk2 will no longer be required, as per my theory, can trigger pk1, therefore the cells were if they amplify the message even when they're not active. But since both enzymes require regular copies together for transduction, pk2 is simple and pk1 requires to also be activated.

What are the monomers that determine the shape of a protein?

Answers

Answer:

Chains of amino acids make proteins. They can fold into many different complex shapes.

If various physiological responses are constantly adjusting, do you think the body is ever in equilibrium?
Why or why not?

Answers

No because there is a consistent trade of energy between us. The body won't accomplish that even after it is no longer living since the body rots and this will likewise make a progression of material and energy between the two.

Respiratory syncytial virus uses the nasopharynx as its main replication site. has symptoms of dyspnea and rales. causes serious disease in infants 6 months old or younger. can be treated with the antiviral aerosol ribavirin. All of the choices are correct.

Answers

Answer:

All of the choices are correct

Explanation:

The respiratory syncytial virus (RSV) is an enveloped, negative-strand RNA virus (Paramyxoviridae family) capable of infecting ciliated cells of the airways by using its surface glycoproteins G and F for attachment and fusion during viral entry in target cells. RSV can affect the lungs and parts of the respiratory system (e.g., nasopharynx). Although RSV generally causes mild, cold-like symptoms, this virus may also lead to severe infection in babies (12 months) and infants, being one of the most common types of respiratory infections in children, older adults, and immunocompromised patients. Some common symptoms in individuals with RSV pneumonia include fever, nonproductive cough, dyspnea, wheezes, rales, rhonchi, etc.

The mutation rate is the probability of a single gene mutating in an offspring bug.

a. True
b. False

Answers

Answer:

True

Explanation:

A mutation is any alteration in the genetic sequence of the genome of a particular organism. Mutations in the germline (i.e., gametes) can pass to the next generation, thereby these mutations can increase their frequency in the population if they are beneficial or 'adaptive' for the organism in the environment in which the organism lives (in this case, an insect/bug). The mutation rate can be defined as the probability of mutations in a single gene/locus/organism over time. Mutation rates are highly variable and they depend on the organism/cell that suffers the mutation (e.g., prokaryotic cells are more prone to suffer mutations compared to eukaryotic cells), type of mutations (e.g., point mutations, fragment deletions, etc), type of genetic sequence (e.g., mitochondrial DNA sequences are more prone to suffer mutations compared to nuclear DNA), type of cell (multicellular organisms), stage of development, etc. Thus, the mutation rate is the frequency by which a genetic sequence changes from the wild-type to a 'mutant' variant, which is often indicated as the number of mutations per round of replication, per gamete, per cell division, etc. In a single gene sequence, the mutation rate can be estimated as the number of de novo mutations per nucleotide per generation. For example, in humans, the mutation rate ranges from 10⁻⁴ to 10⁻⁶ per gene per generation.

Please match the following terms with the appropriate definitions.
Distance

[ Choose ]
Displacement

[ Choose ]
Slope

[ Choose ]
SI unit for speed and velocity

[ Choose ]
SI unit for acceleration

[ Choose ]

Answers

Distance - an amount of space between two things

Displacement - something that is moved from original place or the area between a object when place in water (volume)

Slope - rise over run or an angle of a line

Sl unit for speed and velocity - meter per second

Sl unit for acceleration - meter per second squared

7 examples of RNA and DNA ​

Answers


Rotavirus, polio virus, yellow fever virus, dengue virus, hepatitis C virus, measles virus, rabies virus, influenza virus and Ebola virus are examples of RNA virus.

Adenovirus, herpes virus, poxvirus and papillomavirus are examples of DNA virus.

what are all the zodiac names
if I was born in september what is my zodiac
I WILL GIVE 20 POINTS FOR THIS

Answers

Answer:

Virgo

Explanation:

Have a great day :)

Answer:

libra, cancer, aries, scorpio, leo, pisces, saggitarius, aqurious, capicorn, tarous, and gemini

Explanation:

Virgo

The zodiac sign for September  is Virgo.

This zodiac symbol is considered to influence those born August 23 - September 22, under the Virgo zodiac sign

Question 6
Below which of the following pH is rain regarded as 'acid rain'?
10
6
9
7

Answers

Answer:

10

Explanation:

Most earthquakes happen along the ?
A.fault
B.volcanic mountains
C.pacific ring of fire
D.mid- ocean ridge

Answers

D. Mid- ocean ridge

I need help please!!!

Answers

Answer:

I believe the answer is x

Explanation:

I can't really tell from the graph bit I hope this helps

Its x I think. Baiiiiiiiiiiiii

If a change in the soil occurred, how could that impact the organisms (consumers) in that ecosystem? Pls explain

Answers

Answer:

The soil could kill the plants in the area and the consumers will lose there food and the organisms will die off or go extinct.

Explanation:

Which of these statements about Hox genes is true?
A. They regulate the development of body parts.
B. They occur in random places on the chromosome.
c. They were first discovered in mammals.
D. They are only involved in the development of embryos,
not adults.

Answers

Answer:

A. They regulate the development of body parts

Explanation:

I just did it on Savvas (Pearson)

The statement which is true about HOX genes is they regulate the development of body parts.

What do you mean by HOX genes?

HOX genes may be defined as components of the homeotic transcription factor family that play a key part in controlling the body plan.

HOX genes play two important roles, which are given below:

Specifying the place where the limb of organisms forms.Specifying whether the particular mesenchyme cells will become stylopod, zeugopod, and autopod.

Therefore, the statement which is true about HOX genes is they regulate the development of body parts.

To learn more about HOX genes, refer to the link:

https://brainly.com/question/22998796

#SPJ2

¿Qué organismo se nutren a través de la fotosíntesis?

Answers

Las celulas vegetales es decir las plantas

From his observations in the oceanic islands like the Galapagos, Darwin felt that: isolation is a significant factor in adaptation and speciation spontaneous generation is a significant factor in adaptation and speciation volcanic soils are a significatnt factor in adaptation and speciation inheritance of acquired characteristics is a significant factor in adaptation and speciation. none of these is correct

Answers

Answer:

isolation is a significant factor in adaptation and speciation

Explanation:

In the theory of evolution by natural selection proposed by Darwin, adaptation refers to the adjustment of organisms to their environments in order to increase their chances of survival in that environment. In the Galapagos Islands, Darwin observed that finches had different types of beaks adapted to the type of food they ate. From this observation, Darwin proposed that finches evolved to eat different food sources. In this case, the islands lead to an adjustment (evolutionary) process by which geographically isolated individuals accumulate genetic differences in order to adapt them to the environmental conditions in the islands, which then may also prevent breeding between individuals from different islands when they are reunited (i.e., it may also lead to speciation).

Which of the following conditions is an X-linked disorder?
A.
cystic fibrosis
B.
color blindness
C.
variegation
D.
Down syndrome
E.
sickle cell anemia

Answers

I think the answer is ethier d or e

Answer:

THE ANSWER IS B I THINK

Explanation:

RJEBEJRHRHRRHRH

Other Questions
19 less than 28 Write as a algebraic expression Dirk suffered a heart attack and was rushed to the hospital where heart surgery was performed. His total bill for medical services was $50,000. Dirk has a major medical policy with 80-20 coinsurance, a $1,000 calendar-year deductible, and a $9,000 out-of-pocket limit. The out-of-pocket limit applies to coinsurance only. Assuming this hospitalization was the first medical care that Dirk received during the year and that all of the hospital services were eligible for coverage under the policy, how much of the $50,000 bill will the insurer pay The three general requirements for resisting disease are:eating foods that will give you the proper nutritionexercisingeating foods high in caloriesgetting plenty of resttaking lots of vitamins Just need to identify this stuff If 9:3 is equal to 3:1 and then what is 12:4 equal to ? twice a number divided by 3 If you got famous tomorrow, what would it be for? Ozone in the stratosphere is a form of air pollution,True or False? solve the system of equations x-y=-14 and 5x+7y=-10 by combining the equations. Este texto trata de una iniciativa puertorriquea para mejorar el medio ambiente. El artculo original fue publicado el 4 de octubre de 2014 en Chile por el diario chileno La Tercera. Puerto Rico recicla tan slo un 11.3 por ciento de sus desperdicios slidosConsiderando la informacin presentada en el artculo, qu problema enfrenta Puerto Rico?A) No existe una normativa de reciclaje de alcance nacional.B) Se reciclan muy pocos de los residuos producidos.C) Se producen muchos gases de efecto invernadero.D) No se cumplen las leyes en cuanto a la energa limpia. Which inequalities have the solution set graphed on the number line? Select two options. A number line going from negative 6 to positive 2. An open circle is at negative 4. Everything to the left of the line is shaded. x less-than negative 4 Negative 4 less-than x Negative 4 less-than-or-equal-to x Negative 4 greater-than x x greater-than negative 4 Which region produced more Firearms (weapons) during the Civil War?A. NorthB. South Type the correct answer in the box. Spell all words correctly.Complete the statement with the correct word.-blank- is the act of reaping products at the right time of maturity. True or falseYou always have to use x and y as your variables when writingequations for word problems. What happened when the tanks were first used in battle? Solve for x: help me Solve for z.z7 = 8z = which is the coeffecient of x in this expression?2\3x+4\5y+11\9 -Cuntos nmeros 2 veras si cuentas de del 10 al 22? need help now! (probibility)The weather forecast predicts a 60% chance of rain. However, if it does not rain, the Hershey family has a 90% chance of going to an amusement park. What is the probability of going to the amusement park?