what drives a mass extinction ?

Answers

Answer 1

Answer:

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.

hope this helps


Related Questions

Protists vary in structure and function more than any other group of organisms. However, here are some common traits: a.All have membrane-bounded organelles, and so are ___________________. b.Most are single-celled, or ___________________________. c.They get their food in several ways. Some contain chloroplasts and do photosynthesis, and so are considered __________________. Others ingest food particles and so are ____________________.

Answers

Answer:

a. eukaryotes

b. unicellular

c. autotrophs; heterotrophs

Explanation:

Protists represent a separate kingdom of eukaryotic organisms (ie., organisms whose cells have a nucleus). The most important features of protists include: 1- they are unicellular organisms, 2-contain mitochondria, 3-can be parasites, and 4-generally live in optimal conditions in moist or aquatic environments. In the past, protists were divided into Protozoa (animal-like organisms) and Protophyta (plant-like organisms), which nowadays we know are heterotrophic (also often parasitic) and photosynthetic protists, respectively.

what is meant by the term VO2 max

Answers

Answer:

VO2 max is the maximum volume of oxygen you can consume per minute per kilogram of body weight at your maximum performance. VO2 max is an indication of aerobic fitness and should increase as your level of fitness improves.

Answer:

VO2 is the maximum oxygen uptake.

Explanation:

VO2 is the maximum oxygen consumption during incremental exercise.

I NEED HELP PLEASE!!!

Answers

Answer:

I believe it is convergent boundaries

Explanation:

Answer:

C convergent boundaries

1) Organisms reproduce either sexually or asexually. Asexual
reproduction is the reproductive process in which offspring have only
one parent. Sexual reproduction involves two parents who combine
their genetic material to produce a new offspring. Which of the
pictures show asexual reproduction
A) A&B
B) B&C
C) C&D
D) A,B, & C

Answers

Answer: NO BLOODY PICTURE. I never get the picture, diagram whatever, so why do I get the question?

Explanation:

Plant cells usually can be distinguished from animal cells because only plant cells have

Answers

Answer:

A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane.

Explanation:

Brainliest please?

Which statement best explains the relationship between cellular respiration and photosynthesis?

Answers

Cellular respiration breaks down glucose, while photosynthesis builds glucose.

HURRY I WILL GIVE BRAINLIEST AND VERIFIED ANSWER & 100 PTS Earthworms are a species of worms that lives in moist soil along with other organisms like tiny insects and bacteria. Earthworms obtain water and nutrients by eating dead plant material found in the soil. Earthworms also release waste materials that help enrich the soil. Based on this information, which sentence is correct? The earthworms are an environment. The earthworms are a community. Soil is the earthworm’s habitat. Soil is the earthworm’s niche.

Answers

Answer:

it has to be the last and 2nd last one of them

Explanation:

Sorry if this is wrong

PLEASE HELP ME ITS FOR 17 POINTS!!!!!!!!!!!!!!!!!!!!

A forest area is being used for a new housing development. Most of the trees have been removed to make room for the
new houses. Predict the impact that this will have on the birds in the area.
The bird populations will stay the same because humans love birds.
The bird populations will decrease because humans see them as pests.
© The bird populations will increase because humans do not interfere with wild animals.
The bird populations will decrease due to competition for resources such as food and nesting sites.

Answers

Answer:

The bird populations will decrease due to competition for resources such as food and nesting sites.

Explanation:

Their food and habit is being taken away so they will have to compete. I hope this helps you! :)

Possible Brainliest? You don't have to if you don't want to!

Muticellular organisms, cells are organized into tissues, tissues into organs, organs into organ systems, and system into organisms.

Answers

Answer:

Explanation:

.

Which best describes the process of evaporation/transpiration in the
water cycle?
O A. Water from the ocean enters the atmosphere as water vapor.
O B. Water on the surface of Earth enters the groundwater supply.
C. Water vapor in the atmosphere returns to the surface of Earth as
liquid water.
O D. Water on the surface of Earth and water lost by plants enters the
atmosphere as water vapor.

Answers

Answer:

A

Explanation:

Answer:

The answer is D

Explanation:

Water on the surface of Earth and water lost by plants enters the atmosphere as water vapor

The person above me is wrong I tried it and it was wrong and I tried D and I got it correct

3. What things does your body do automatically to cool down or warm up?

Answers

Answer:

For your body to cool down one method is to sweat.

Explanation: Your sweat glands release sweat, which cools your skin as it evaporates. This helps lower your internal temperature

To keep warm your body shivers and your blood pressure decrease, it brings the blood back to the heart to keep you warm, also in you blood, your hormones create glucungons that makes the liver shoot out glucose to keep you warm. To keep cool you body sweats and in you blood the hormones create something called insulin that makes you cell take in the glucose in you blood.(Fun Fact: the things that I just said are negative feedback).

What does it mean for a model to be "to scale", or a scaled model?

Answers

Answer:

To scale means it's the same size as in real life, as in 1 foot = one foot

Scaled means it's shown either larger or smaller, as in 1 foot = 1 inch or 1 foot = 1 mile

Explanation:

I need help. Thanks!

Answers

Answer:

They bounce around and take form of the container

Explanation:

true or false , the mRNA codon UGG is the only codon that codes for the amino acid tryptophan

Answers

Answer:

true

Explanation:

Is Octane a mIxture??

Answers

Answer:

No

Explanation:

Octane is a straight-chain alkane composed of 8 carbon atoms. Octane is a colorless liquid with an odor of gasoline. Less dense than water and insoluble in water.

Answer:

Octane is a straight chain alkane made up of eight carbon atoms. ... N-octane is a colorless liquid with a diesel scent. Less thick than water, insoluble in water.

Explanation:

Description: Octane is a chain alkane.

Molecular formulas: C8H18 or CH3-(CH2)6-CH3

When you use the same histone protein as your standard, you determine the histone protein concentration to be 5 mg/ml. Explain the discrepancy (pick ONE answer): (5 points) a. The histone protein has fewer basic amino acids than albumin. b. The histone protein has more acidic amino acids than albumin c. The histone protein has more basic amino acids than albumin d. The histone protein contains more methionine than albumin

Answers

Answer:

A. The histone protein has fewer basic amino acids than albumin

Note: The question is incomplete. The complete question is given below:

You use the Bradford (coomassie) assay to determine the concentration of a whey protein. You use bovine albumin as your standard. You determine the histone protein concentration to be 3 mg/ml. When you use the same whey protein as your standard, you determine the histone protein concentration to be 5 mg/ml. Explain the discrepancy (pick ONE answer): (2 points) The histone protein has fewer basic amino acids than albumin. The histone protein has more acidic amino acids than albumin c. The histone protein has more basic amino acids than albumin d. The histone protein contains more methionine than albumin

Explanation:

The Bradford assay measures the concentration of proteins in a a protein sample using a color change that occurs from brown to blue when the protein in the sample binds to Coomassie dye. The Coomassie dye specifically binds to basic and aromatic amino acids in the protein. A standard curve is created using absorbance data from samples of proteins of known concentrations. The spectrophotometer is set to read at 595 nm in the Bradford assay as the peak absorbance of Coomassie Blue once bound to proteins occurs at 595 nm.

The higher the concentration of proteins, the higher the color intensity and the higher the absorbance values.

Since when bovine serum albumin was used as standard, the sample protein concentration was lesser than when the protein sample was used as standard, this means that the sample protein binds less to Coomassie dye as a standard thereby giving a higher sample protein concentration than the BSA standard. Therefore, the histone protein has fewer basic amino acids than albumin.

The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on these data, this enzyme functions best at what temperature and pH? *

Answers

The graph is attacged and the options is as follows:

Temperature of 27oC and a pH of 4

Temperature of 37oC and a pH of 6

Temperature of 40oC and a pH of 8

Temperature of 50oC and a pH of 10

Answer:

The correct answer would be - temperature of 37oC and a pH of 6

Explanation:

The graph 1 shows the relation between the rate of reaction for an enzyme and the temperature of  reaction is been represented. In this graph the rate of eaction is highest (point from the slope starts decreasing) at the So, by the options and graph the temperature 37°C(Below 40°C) rate of reaction is maximum.

Similarly, in other graph rate of reaction and and pH has been represented in which rate of reaction is maximum at pH 6. after 6 pH the rate of reaction started decreasing.

Which of the following is found in all organisms?
o chloroplast
O lysosomes
nucleoli
ODNA

Answers

D. DNA
All organisms contain dna

Carbohydrates like glucose can undergo spontaneous rearrangement to give an alternate configuration for the anomeric carbon when the ring is free in solution. However, when glucose is covalently attached to another sugar through C1, this rearrangement cannot occur. Consequently, the configuration of carbohydrate oligomers and polymers is fixed. Why can't glucose rearrange when in a polymer form?

Answers

Answer:

The presentation according to another circumstance is categorized in the following section.

Explanation:

Glucose constructs anomers because of the extreme involvement of flexible metal-carbon because that continues to exist as something of a monomer. However, when plastics are established, transformation is limited with glycoside formation of complexes among both anomeric carbon atoms.

Sucrose, besides obvious reasons, would be manufactured by glucose and fructose, which have been connected by something like a glycerol backbone involving glucose carbon atom as well as fructose. The mechanism including its creation of anomers even by movement through carbon becomes called "Mutarotation" Sucrose doesn't always show mutation.

How is Gypsy’s story related to psychology?

Answers

Answer:

Gypsy’s story is directly related to psychology.

Explanation:

Gypsy’s story is related to psychology because according to her mother who said that her daughter Gypsy Rose suffering from leukemia, and mental disorder but this claim of her mother proved wrong when the full health check up of Gypsy Rose was held. The doctors said that she was psychologically torture by her mother which leads to the killing of her mother.

In humans, mitosis produces cells with ____ chromosomes and _____ chromosomes are found in the gametes after Meiosis.

Answers

Answer:

46, 23

Explanation:

The modern industrial agricultural practice that has resulted in high yields but with a loss in biodiversity is:

Answers

Answer: Monoculture

Explanation:

One type of crop at a time in one specific field. "Mono" means one.

4. Which is produced in cellular respiration? A. Carbon dioxide B. Oxygen C. Sugar​

Answers

That would be A. Carbon dioxide.


I hope this helped!

I would appreciate it if you gave me a thanks and brainliest mark (:

Answer: A

Explanation:

During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water.

A mutation is a (chance) of genetic material.

Many mutations are (neutral) (meaning not helpful nor harmful)


mutations Insertions and deletions are (?)​

Answers

Answer:

An insertion changes the number of DNA bases in a gene by adding a piece of DNA. As a result, the protein made by the gene may not function properly. Deletion. ... This type of mutation occurs when the addition or loss of DNA bases changes a gene's reading frame.

Brainliest Which of the following best explains how most plants grow? *


Plants store the excess oxygen they produce, resulting in them gaining mass

Plants store the excess glucose they produce, resulting in them gaining mass

Plants store the excess carbon dioxide they produce, resulting in them gaining mass

Plants store the excess water they produce, resulting in them gaining mass

Answers

Answer:

plants store the glucose they produce, resulting in them gaining mass. that should be the correct answer

What is sexual
reproduction? What is the advantage of this method of reproduction?

Answers

Sexual Reproduction - type of reproduction that involves two parents

Advantage - more genetic diversity in species

sexual reproduction: reproduction with two parents
advantages: diverse genetic makeup

research on obesity rates and genetically based skin color illustrate different types of biological change because

Answers

Explanation:

research on obesity rates and genetically based skin color illustrate different types of biological change because obesity rates demonstrate an evoked cultural response; genetically based skin color does not.

Please help I need it ASAP!!

Answers

The answer is T: cells, tissue, organs, organ system
T : cells, tissue, organ and organ systems

There is a multitude of evidence that supports how life has changed over time due to variation in the gene pool of different species. Which of the following choices below represents a scientific theory that explains these changes? *
A. As environments and ecosystems change over time, those that acquire suitable traits are more likely to survive and reproduce and the gene pool changes because organisms must adapt to survive and reproduce.
B. As environments and ecosystems change over time, those with variations for traits that are more successful in the new conditions are more likely to survive and reproduce, thus changing the allele frequency in the gene pool.
C. Because the environments and ecosystems show little change over time, organisms are already adapted for surviving in their given habitats for which they are made.
D. Because the environments and ecosystem show little change of time, the organisms that choose to adapt to different environments will migrate and become suited for new habitats.

Answers

Answer: A. Environmental drivers plus genetic variation in the population result in natural selection

Explanation: over geological time environmental conditions change. Organisms do not survive in one environmental niche with traits adapted to a possible future change that might suit those traits. Adaptation is not a matter of choice: adapt if possible or go extinct.

There is a (badly named) concept called pre-adaptation, which is that variations in some existing trait render adaptation to a different environment more likely.

Answer:

A

Explanation:

What is the danger posed by introduced species? *
O Non-native species might have no natural predators in their new environment
Non-native species can occupy space and crowd out indigenous species
Non-native species might prey on native species threatening extinction
All of these are dangers posed by introduced species

Answers

all of these are dangers posed by introduced species
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Which statement about the alkali metals is correct?A. They are usually gases.B. They are extremely unreactive.C. They are located in the left-most column of The Periodic TableD. They form negative ions with a -1 charge help plzzzz ill give extra points Evaluate the following expression using the values given: Find 5x 3y z if x = 2, y = 2, and z = 3 PLZZ HELPP OR IM FAILLING Which amendment gave women the right to vote?a. 13th Amendmentb. 14th Amendmentc. 15th Amendmentd. 19th Amendment Price of Rope3 The amount a hardware store pays for buying nylon ropeis represented by the equation y = 0.12%, where y is theprice it pays for x feet of rope. The amount the hardwarestore charges when selling the rope is represented bythe graphThe profit the store makes on the rope can be found bysubtracting the amount it charges for the rope from theprice it pays for the rope. If the store sells 80 feet of rope,how much profit does it make on that rope?Show your work.yA1.801.601.401.208 1.000.800.600.400.200 1 2 3 4 5 6Length (ft) What is the LA=______DEGREES at Best Buy they have a stereo system at the cells of 22000 and is on sale for 15% and sales tax is 7%. what is the final cost HELP I NEED FAST PLZZZ Belinda wrote the following phrase to describe the movement of particles in a state of matter."Marbles glide past one another."Which state of matter did Belinda most likely describe? Manuel ate lunch in 5 minutes. How many seconds is this? The Earth is heated by light from the Moon. TrueFalse Members of a baseball team raised $1199.50 to go to a tournament. They rented a bus for $830.50 and budgeted $30.75 per player for meals. Determine the number of players the team can bring to the tournament. How many atoms are in 2.37 moles of Krypton A store is having a 20%-off sale on all pairs of shoes. Kurt wants to buy a pair of shoes that have a regular price of x dollars. The sales tax is 7%. Which expression represents the final price of the shoes? the question is on the sheet. WILL MARK BRAINLIEST what type of transformation is described by (x,y) > (x+2, y+16)? which quotation from the devil short story supports the answer to part a ok how is every ones day ok what is 12345 times 23456= the subjects of Oceanic art are usually about ___A- farming,trade,and governmentB. Human sacrifice or military conquestC. fertility , human leaders, and the supernaturalD. nature or everyday objects Juan pago $50.00 pesos por 3 cajas de paquetes y 5 cajas de clavos, mientras que Pedro compr 5 cajas de taquetes y 7 cajas de clavos y tuvo que pagar $ 74.00 pesos . Cual es el precio de cada caja de taquetes y clavos ? a) Cuantas incgnitas hay en el problema ? b) Cuntas ecuaciones puedes construir segn el texto?c) Cuales son esas ecuaciones? Separate the following gene sequence into codons: TACGTCTTACGCTATGTCAnswer really quick plssss