1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anvisha [2.4K]
1 year ago
8

what is a mass extinction? what is a mass extinction? an event that causes the extinction of a large fraction of earth's species

an extinction caused by the impact of a massive asteroid or comet an event that causes most, but not all, of the population of various species to die an event in which the largest of earth's species go extinct
Biology
1 answer:
sineoko [7]1 year ago
8 0

A mass extinction event occurs when a species disappears far more quickly than it is replaced. This is typically understood as the loss of around 75% of all species over a "short" period of geological time, or fewer than 2.8 million years.

An enormous number of species were wiped out by a harsh, worldwide, swift, and selective event is mass extinction. According to marine fossils, at least 75% of all species are thought to have become extinct. The most recent mass extinction is the Cretaceous-Paleogene extinction event, which is also the only one that can be proven to have been caused by a significant asteroid impact. All non-avian dinosaur species, making up about 76 percent of all species on the earth, perished during mass extinction. The Chicxulub asteroid impact in what is now Mexico, which occurred 66 million years ago, caused an ecosystem collapse that resulted in the extinction of the dinosaurs and >75% of all land and sea species as well as the macroevolution of mammals.

Learn more about mass extinction

brainly.com/question/11872946

#SPJ4

You might be interested in
Peat is a mixture of partially decomposed plant and animal material found in waterlogged, acidic, anaerobic environments. people
Verizon [17]

because the total time for restoration is lengthy, peat can be considered a fossil fuel. The correct option is B.

<h3>What exactly are fossil fuels?</h3>

Fossil fuels are fuels derived from the remains of dead plants and animals that decomposed over time under intense heat and pressure.

Because their replenishment time is longer than a human lifetime, fossil fuels are non-renewable energy sources.

Some examples of fossil fuels are petroleum, coal, etc.

The missing options of the question are:

  1. peat is a fossil fuel because rewetting it takes only 3-5 years.
  2. peat is a fossil fuel because the total time for restoration is lengthy.
  3. peat is not a fossil fuel because it has biologic origins, making it a biofuel.
  4. peat is not a fossil fuel because humans can promote the replenishment of peat.

The restoration process of peat takes a long time of more than 100 years. As a result, because the total time for restoration is lengthy, peat can be considered a fossil fuel.

Thus, the correct option is B.

For more details regarding fossil fuels, visit:

brainly.com/question/2029072

#SPJ1

3 0
2 years ago
¿Por qué las bacterias resistentes se multiplican más rápido después de que un paciente ha tomado antibióticos en comparación co
Fofino [41]

Answer: In Spanish

¿Cómo se vuelven resistentes las bacterias a los antibióticos?

R: Las bacterias pueden volverse resistentes a los antibióticos de varias maneras. Algunas bacterias pueden "neutralizar" un antibiótico cambiándolo de una manera que lo hace inofensivo. Otros han aprendido a bombear un antibiótico fuera de la bacteria antes de que pueda causar algún daño. Algunas bacterias pueden cambiar su estructura externa, por lo que el antibiótico no tiene forma de adherirse a la bacteria que está diseñada para matar.

Después de exponerse a los antibióticos, a veces una de las bacterias puede sobrevivir porque encontró una manera de resistir el antibiótico. Si incluso una bacteria se vuelve resistente a los antibióticos, puede multiplicarse y reemplazar todas las bacterias que fueron eliminadas. Eso significa que la exposición a los antibióticos proporciona una presión selectiva que hace que las bacterias sobrevivientes sean más propensas a ser resistentes. Las bacterias también pueden volverse resistentes a través de la mutación de su material genético.

Answer in English :

How do bacteria become resistant to antibiotics?

A: Bacteria can become resistant to antibiotics through several ways. Some bacteria can “neutralize” an antibiotic by changing it in a way that makes it harmless. Others have learned how to pump an antibiotic back outside of the bacteria before it can do any harm. Some bacteria can change their outer structure so the antibiotic has no way to attach to the bacteria it is designed to kill.

After being exposed to antibiotics, sometimes one of the bacteria can survive because it found a way to resist the antibiotic. If even one bacterium becomes resistant to antibiotics, it can then multiply and replace all the bacteria that were killed off. That means that exposure to antibiotics provides selective pressure making the surviving bacteria more likely to be resistant. Bacteria can also become resistant through mutation of their genetic material.

I don't know if this help you at all.

3 0
3 years ago
The shoulder is ______ to the neck.<br><br> Lateral<br> Medial<br> Distal<br> Proximal
Travka [436]

The shoulder is Lateral to the neck.

<h3>Is the shoulder lateral or medial?</h3>

Away from the median plane of the body (ex: the shoulder is lateral to the head or the ear is sideways to the brain). Medial: toward the median plane of the body (ex: the head is medial to the shoulder or the nose is medial to the cheek).

Thus, option "A" is correct.

To learn more about  Lateral shoulder click here:

brainly.com/question/25647852

#SPJ1

8 0
2 years ago
Read 2 more answers
What is the flow of water called
PSYCHO15rus [73]

Answer:stream Flow or the channel runoff

Explanation:

Explanation:

7 0
3 years ago
Which one is incorrect?
Dafna11 [192]
A. Cellular Respriration starts with glycolysis is the answer
3 0
3 years ago
Other questions:
  • What do lysosomes use to break down foreign matter and dead cells
    11·1 answer
  • Question 4 Unsaved
    14·1 answer
  • Based on the location of the flagellum what function does it serve
    7·1 answer
  • When blood glucose levels are high and the glucose is not utilized for cellular respiration, the human body will store this gluc
    13·1 answer
  • En que etapa de la meiosis se forma un nuevo nucleo
    7·1 answer
  • the drinking water in a location in florida had a foul odor and taste. investigatiors revealed that storm water runoff had carri
    6·1 answer
  • What organelle is responsible for protein synthesis?
    15·1 answer
  • Growing a new plant from the cuttings of a parent plant is an example of
    11·2 answers
  • How can analyzing amino acid sequences can help scientists infer patterns of evolution between species?
    15·1 answer
  • Particles of the ground that have a lot of energy can do two different things with this energy. What are these two things?​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!