What is believed to be the main cause of most mass extinctions throughout geological history?

Answers

Answer 1

Answer:

was caused by global warming that left ocean animals unable to breathe. The largest extinction in Earth's history marked the end of the Permian period, some 252 million years ago

Explanation:

Answer 2
Although the best-known cause of a mass extinction is the asteroid impact that killed off the non-avian dinosaurs, in fact, volcanic activity seems to have wreaked much more havoc on Earth's biota. Volcanic activity is implicated in at least four mass extinctions, while an asteroid is a suspect in just one.

Related Questions

Hybrid plants are more likely to be sterile than open-pollinated plants.
True
False

Answers

Answer: true

Explanation:

1. Which of the following is a facultative anaerobe?
A. Clostridium sporogeneses
B. Mycobacterium tuberculosis
C. Escherichia coli
D. Micrococcus luteus

2. Which of the following is a strict anaerobe?
A. Clostridium sporogeneses
B. Mycobacterium tuberculosis
C. Escherichia coli
D. Micrococcus luteus

3. Which of the following is a microaerophile?
A. Clostridium sporogeneses
B. Mycobacterium tuberculosis
C. Escherichia coli
D.micrococcus luteus

Answers

Answer:

1 .c

2.a

3.a

hope it helps

How are mitosis and meiosis similar?

A.
both require DNA replication

B.
both have two cell divisions

C.
both produce gametes

D.
both involve crossing over

Answers

I think is d,,,,,,,,,,,,,,,,

air particles from areas of

Answers

Answer:

Size comparisons for PM particles. PM stands for particulate matter (also called particle pollution): the term for a mixture of solid particles and liquid droplets found in the air. Some particles, such as dust, dirt, soot, or smoke, are large or dark enough to be seen with the naked eye.

Explanation:

Can any body help me plzz

Answers

most likely crop rotation if not i dont know

Q. Why is energy required by an organism even during sleep ?
Q. Give the energy transformation that takes place in the process of photosynthesis.
Q. What is chlorophyll ?
Q. Name the various factor which affect the rate of photosynthesis.
Q. Define photolysis.​

Answers

➥ Even, when an organism is asleep, various biological processes keep on occurring in its body which requires energy.

➥ During photosynthesis‚ “Solar energy is converted into chemical energy”.

➥ “Chlorophyll” is a green coloured pigment found in plants that helps in absorbing sunlight used in photosynthesis.

➥ Several factors which affect the rate of photosynthesis:

Light. Temperature. Water.CO2.

➥ “Photolysis” is the process by which water is split into oxygen, which is released into the atmosphere, and hydrogen.

help guysssss with my 73 points as plssssss​

Answers

Answer:

I'm pretty sure it's oil gland hope this helps

the answer is d) oil gland

Which of the following processes is a form of cell division?



Go phase


G2 phase


Mitosis


Cytokinesis


Both options 1 and 2


Both options 3 and 4

Answers

Answer:

both options 4 and 3 is the answer..

What factors can disrupt Earth's systems?

Answers

Answer:

Natural disasters and human activity.

Explanation:

1. overpopulation
2. pollution,
3. burning fossil fuels
4. deforestation.

can anyone help me it due today?​

Answers

Answer:

Hi how are you doing today Jasmine

Answer:

3

Explanation:

primary consumers/1st order heterotrophs

Which of the following is closest to the weight in Newtons of a 20 kg
object on the Earth's surface? g = 10 m/s2
a 200N
b 400N
C 20 N
d 350 N

Answers

Answer:

AHHHHH LESLIE

Explanation:

BAHHAHAIRIDJ WHY HE ASIGN THIS SHII IT DONT MAKE SENCEEE

Answer:

200n is the answer

Explanation:

ur welcome

What cell tissue helps animals move?

options:

muscular
nervous
connective

Answers

Answer:

MUSCLE CELLS also known as Myocytes

Explanation:

the muscle fibers or muscle cells are long tubular cells responsible for moving an organism’s limbs and organs. Muscle cells can be either skeletal muscle cells, cardiac muscle cells or smooth muscle cells

Snails move with the help of

Answers

Answer:

the slimy thing that helps them slide everywhere :)

Explanation:

The muscle in Lanes arm would best be described as which of the following?

Answers

Answer:

what following

Explanation:

What group of Echinoderms has penta-radial symmetry?
A.Sand dollar
B. Sea Cucumber
C.Sea Star
D. Sea Urchin
E. All of the above

Answers

Answer is E

Examples of Pentaradial Symmetry. In the animal

kingdom, there is only one known phylum that exhibits pentaradial symmetry, and that's the Phylum Echinodermata. Echinoderms include sea stars (or starfish), sea urchins, sea lilies, sand dollars, and sea cucumbers.

Please look at the photo and help me ASAP

Answers

Answer:

1 red, 2 pink, 1 white

write a story of an atom below

Answers

Answer:

Democritus who was a Greek philosipher, believed that everything was made from tiny little indesrtuctible and undividable spheres called atoms at 400 B.C.E. Thomson believed that atoms were positively charged spheres of matter with electrons being randomly scattered in them in 1904

Which of the following is the correct order for the major parts of the gastrointestinal tract?

Question 7 options:

mouth, stomach, esophagus, large intestine, small intestine


esophagus, stomach, large intestine, small intestine, mouth


mouth, small intestine, stomach, esophagus, large intestine


mouth, esophagus, stomach, small intestine, large intestine

Answers

Mouth, esophagus, stomach, small intestine, large intestine

Explain the importance of organic compounds to the cell.

Answers

Answer:

Organic compounds essential to human functioning include carbohydrates, lipids, proteins, and nucleotides. ... Monomers are single units of organic compounds. They bond by dehydration synthesis to form polymers, which can in turn be broken by hydrolysis. Carbohydrate compounds provide essential body fuel.

What system includes the living components of the Earth?
a. geosphere
b. hydrosphere
c. atmosphere
d. biosphere
Please select the best answer from the choices provided
O A
OB
O C
OD​

Answers

Explanation:

d is the answer..........

Answer:

D

Explanation:

this contains all living organisms and it is intimately related to the other three spheres: most living organisms require gases from the atmosphere, water from the hydrosphere and nutrients and minerals from the geosphere.

Blood, a component of the ____________ , acts as the medium of hormone transportation throughout the body.

Answers

Answer:

BODY is the answer

Explanation:

Pls mark BRAINLIEST

circulatory system !!

Why are so many station miles used to gather weather data in the United States

Answers

Answer:

Why are so many station models used to gather weather data in the United States? Because the country is so large, and Earth's atmosphere is constantly changing, we need data from many stations to make accurate forecasts. ... A barometer is used to measure air pressure.

Explanation:

Tall (T) is the dominant allele in pea plants, while short (t) is recessive. Which are the genotypes of a tall plant?

Help!!!!!

Answers

Answer:

d

Explanation:

A dominant always masks a recessive characteristic in a genotype, so Tt is a tall plant. TT has two dominant traits, so it is also tall.

What is one environmental activity/event that can impact 3 of Earth’s spheres?

Answers

Answer:

Humans have a huge impact on all spheres. Negative impacts, such as burning fossil fuels, pollute the atmosphere. Piling up our waste in landfills affects the geosphere. Pumping waste into the oceans harms the hydrosphere.

Which set of structures makes up the brain stem? HINT: It's not B.

A. midbrain, pons, and medulla
B. pons, cerebellum, and medulla
C. midbrain, cerebrum, and cerebellum

Answers

Your answer is A. Midbrain, pons, and medulla.

Someone!! please and thank you

Answers

B.  the dad has 2 upper case A's, and the mom has one uppercase A and one lower case a allele.

Answer:  B I think the answer I was going for isn’t an option

Explanation:

What is chemical energy? What is mechanical energy? Give an examples. Your answer:

Answers

Answer:

Below

Explanation:

Chemical energy is stored chemicals as energy.

Chemical energy is in the food we eat.

Mechanical energy is kinetic and potential energy put together tomake movement.

Example: When bowling the bowling ball has mechanical energy, when the ball hits the pins, mechaincal energyis tranferred to the pins.

Brainilest?

why is a dominant acele called dominant​

Answers

Answer:

Dominance is a relationship between two alleles of a gene and their associated phenotypes.

A "dominant" allele is dominant to a particular allele of the same gene that can be inferred from the context, but it may be recessive to a third allele, and codominant (both appear in the organism) to a fourth.

good luck, i hope this helps :)

 

What is true of all body cells except sex cells?

Answers

Answer:

You have it completely right!

Explanation:

The answer is C because the chromosomes are counted by the number of centromeres which are contained on chromosomes and chromatids!

Why is it important to center the object you want to look at in your field of view before changing to a higher magnification objective lens? A. So the object is still in your field of view at the higher magnification. B. So you can always see the entire object at the higher magnification. C. So you do not damage the higher magnification objective lens.​

Answers

Answer:

B. So you can always see the entire object at the higher magnification

Explanation:

A microscope is used to view objects smaller than the naked or unaided eyes can see. The objective lens, in conjunction with the occular or eye lens, is used to achieve this purpose. The objective lens are of different magnifications as follows: 10X, 40X, 100X etc.

However, as the magnification increases i.e. higher objective, the object in the field of view becomes smaller and less focused. Hence, the object in the field of view must first be centered at a lower magnification/objective lens before changing to a higher one in order for the entire object to be seen at a higher magnification.

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