What method do scientists use to trace plant and animal extinctions through Earth's history

Answers

Answer 1

Answer:

Paleontology is the study of the history of life on Earth as based on fossils. Fossils are the remains of plants, animals, fungi, bacteria, and single-celled living things that have been replaced by rock material or impressions of organisms preserved in rock.

Explanation:

Answer 2
Because there are very few ways of directly estimating extinction rates, scientists and conservationists have used an indirect method called a “species-area relationship.” This method starts with the number of species found in a given area and then estimates how the number of species grows as the area expands.
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Related Questions

What is the mRNA made from the following DNA.
CGATCG?
(please help!)
A. CGTUCG
B. CGATCG
C. GCTAGC
D. GCUAGC

Answers

Answer:

GCUAGC (D)

Explanation:

DNA always consists of A/T and C/G

RNA (mRNA/tRNA always consists of A/U and C/G but never T!

If you have a T in your DNA, your mRNA will have an A.If you have an A in your DNA, your mRNA will have a U.

DNA never has a U, but RNA never has a T.

Hope this makes sense!

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What would happen to the members of a food web if most of the trees died?
A. only the trees will be effected
B. only things that eat tree leaves will have less to eat
C. Nothing will happen
D. The whole food web will be disrupted

Answers

D is the correct answers
D is the right response

Which feature of chytrids makes them different from the other types of fungi? the material that strengthens their cell walls the special digestive material they release their use of budding to reproduce their ability to live in dry environments

Answers

Answer:

the material that strengthens their cell walls

Explanation:

Chytrids originate from the kingdom fungi and a division known as Chytridiomycota. They contain a feature of unique characteristics by the presence of the chitin and the cellulose cell wall. The chitin made up the component of their cell wall in fungi but in Chytrids, the cellulose helps to strengthens their cell walls.

Answer:

A. the material that strengthens their cell walls

2. What can you infer from the fact that ants make up
20 percent of the mass of all land animals combined?
a. Ants are very heavy
b. Ants live for a long time
c. Ants thrive in locations all over the world
d. Ants breed faster than any other organism on earth

Answers

D, because they are not heavy, so if they form 20 percent of the mass of all land animals combined it means that there are many ants in the world due to the fast breed

Ant breed faster than any other organism on earth, 20% of earth mass have land animals. Many ants are on the earth. Thus, option D is correct.  

What are the major features of ants ?

Ants belongs to Formicide family  which is related to so called eusocial insects like bees and termites. It is appeared in the Cretaceous period that is more than 90 million years ago.

The diversity of ants is every where except Antarctica.

The body has three parts such as  a head, a meso-some and metasoma or gaster.

Ants are mostly omnivorous but can be scavengers , predators or herbivores based on ecological context.

The reproduction in which young, queens  fly during mating time, fertilize with male, this flight is called as nuptial flight.

Then queen lay eggs, then larvae emerge to become pupae, then adults such as workers, soldiers, males or other queens are produced.

Thus, option D is correct.  

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why are there 2 hydrogen atoms and only one oxygen

Answers

Answer:

Oxygen is an electronegative

Explanation:

Not only is it because in the chemical equation for water there is 2 hydrogen atoms and 1 oxygen atom, but they also share their electrons to fill their outermost levels and that are attracted together.

Hope this helps!!

Every 3 bases (a codon) in the RNA codes for 1 amino acid.
Example: CCA codes for proline (pro)
2. Write the amino acid that corresponds to each codon.
CGG
CUG
AGC
CAG

Answers

Answer:

Lysine

Leucine

Serine

Glutamine

HELP NEED THIS BY TODAY!
What did Mendel study that lead him to his discovery

Answers

Answer:

A monk, Mendel discovered the basic principles of heredity through experiments in his monastery's garden. His experiments showed that the inheritance of certain traits in pea plants follows particular patterns, subsequently becoming the foundation of modern genetics and leading to the study of heredity.

Explanation:

Answer:

Mendel studied the genetics of pea plants.

Explanation:

Mendel looked at the pea plants in his monastery garden to determine genetics. He found that some plants had white flowers, while some did not, and he used that discovery to determine the genetics of the plants.

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Darcy put three healthy plants in pots. She put them in three places. Each plant had good soil, air, and water. After three weeks,
Darcy checked on the plants.
Based on the results, where do you think Darcy put plant #2?
es )
A)
in the shed
B)
under a tree
)
on the back deck
D)
in the front yard
Fr

Answers

What were the results? Was there a table or graph included in this question?

Answer:

A)in the shed

Explanation:

Just did the usa test prep

please help me
What are segments?​

Answers

Answer:

each of the parts into which something is or may be divided.

All of the following are types of somatoform disorders except __________.
A.
conversion disorder
B.
obsessive-compulsive disorder
C.
somatization disorder
D.
hypochondrias

Answers

Answer:

B.

obsessive-compulsive disorder

Explanation:

The types of somatoform disorders does not include the obsessive-compulsive disorder.

What is somatoform disorders?

Somatic symptom disorder (SSD should be called as the somatization disorder or somatoform disorder. It is the form of mental illness that leads into one or more symptoms such as pain.

Therefore, it include the conversion disorder, somatization disorder, hypochondrias

Hence, the option b is correct.

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Put "Sympatric Speciation" in a sentence

Answers

Answer:

A 2008 study suggests that sympatric speciation has occurred in Tennessee cave salamanders.

Explanation:

Hope this helps

Choose which statement best describes an element.

A. Anything that takes up space

B. A pure substance that cannot be broken down into other substances by chemical means.

C. Water

D. Atom has a nucleus with neutrons and protons in it.​

Answers

Answer:

B

Explanation:

Elements are pure substances that cannot be broken down into other substances by chemical means .

Why would the atomic number be better to identify an element than the atomic mass?

Answers

Answer:

because the atomic number tells you how many protons and neutrons there are

Explanation:

Can someone help me with this chromosome assignment?

Answers

this is the answer for only first page.

homologous, diploid,gametes,haploid

the same thing as what the other person said.

di=2

hap=1

remember that for diploid and haploid

When organisms

they increase in size.

Answers

Answer:

The increase in size and changes in shape of a developing organism depend on the increase in the number and size of cells that make up the individual. Increase in cell number occurs by a precise cellular reproductive mechanism called mitosis.

Explanation:

Despite his fear of germs, Howard Hughes neglected his own hygiene despite having those around him follow strict cleanliness practices. Hughes had these odd behaviors because __________.
A.
he believed he was unable to escape any infection
B.
he developed obsessive-compulsive disorder at an old age
C.
he thought he would be contaminated from the outside
D.
his paralysis at a young age prevented him from being self-sufficient

Answers

Answer: it’s c he thought he would be contaminated from the outside

Explanation:

I took the test

Howard Hughes neglected his own hygiene despite having those around him follow strict cleanliness practices. Hughes had these odd behaviors because he thought he would be contaminated from the outside.

What is importance of cleanliness?

Cleanliness gives rise to a good character by keeping body, mind, and soul clean and peaceful. The cleanliness only which helps to improve our personality by keeping clean externally and internally.

Thus, option "C" is correct.

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how does the cell work

Answers

Cells get crude materials — counting water, oxygen, minerals and other supplements — from the nourishments you eat. They let in crude materials through the cell film: the lean, versatile structure that shapes the border of each cell.

As a cell grows in size, transporting the materials in and out of the cell becomes more difficult. Which process would help a cell to efficiently transport more materials into the cell as it grows?
Grupo de escolhas da pergunta

A) The cell develops a thinner cell membrane.

B) The cell undergoes a mutation.

C) The cell stores more materials in its vacuoles.

D) The cell divides into two cells creating more space for materials.


ASAP

Answers

Answer: D

Explanation: I answered the question

When the process would helps a cell to efficiently transport more materials into the cell as it grows: The cell divides into two cells creating more space for materials.

How does a Cell Grow?

When a Cell growth is not to be confused with cell division or the cell cycle, which are distinct processes but they can occur alongside cell growth during the process of cell proliferation,

whereas a cell, it is known as the "mother cell", Also, when grows and divides to produce two " daughter cells ".

Therefore, The correct option is 'D'. The cell divides into two cells creating more space for materials.

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what do the arguments for and against the use of stem cells in medical research share?​

Answers

Answer:   Stem cell research can potentially help treat a range of medical problems. It could lead humanity closer to better treatment and possibly cure a number of diseases:

Parkinson’s Disease

Alzheimer’s Disease

Heart Diseases, Stroke and Diabetes (Type 1)

Birth Defects

Spinal Cord Injuries

Replace or Repair Damaged Organs

Reduced Risk of Transplantation (You could possibly get a copy of your own heart in a heart-transplantation in the future

Stem cells may play a major role in cancer

Better treatment of these diseases could also give significant social benefits for individuals and economic gains for society

Cons

"We should not mess with human life."

"Humans should not be trying to play God"

Some argue that stem cell research in the far future can lead to knowledge on how to clone humans. It is hard to say whether this is true, but we have seen devastating consequences of other research-programs, even with good intentions, such as nuclear research.

Stem cells are cells, which have the ability to transform into many different types of cells. The stems cells have the potential to specialize in any type.

The stem cells are extensively used for research, curing diseases, and especially in developing prosthetics. The stems cells provide new cells for the growth and development of the replaced and damaged cells.

The arguments for and against the use of stem cells are:

Arguments for the use of stem cells in medical research are:

1. The stem cells enhance the growth and development of healthy skin tissue.

2. The cells can be used to enhance the production of collagen.

3. The study of stem cells helps in understanding the causes of disease.

Arguments against the use of stem cells in medical research are:

1. The use of stem cells for research harms human life and dignity.

2. People believe that killing blastocysts or stem cells is equal to taking a human life.

3. However, the transplant of stem cells can be rejected by the patient's body, therefore, can cost the life of the patient.

Therefore, the use of stem cells for research can be fruitful or disadvantageous.

To know more about stem cells, refer to the following link:

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Si fuimos creados para la felicidad ¿Por qué la mayoría de las personas viven sus vidas de manera infeliz? Escribe por las menos 3 razones

Answers

Answer: esto se deve a la monotonia por ejemplo el trabajo hacer eso todos los dias es estresante

tambien puede ser devido a problemas personales por ejemplo un divorcio la muerte de algun familiar.

o pueden ser las condiciones de vida que se poseen

Explanation:

2. What are the two main forms of energy? Describe them.

Answers

Answer:

Kinetic energy and Potential energy

Explanation:

Thank you

K and p energyyyyyy

PLEASE HELP, WILL MARK BRAINLEST

The picture below shows a model of the solar system.

Picture shows the sun in the center and six circular orbits around it. The first orbit around the sun has the planet Mercury, the second orbit has planet Venus, the third orbit has planet Earth, the fourth orbit has planet Mars, the fifth orbit has planet Jupiter, and the sixth orbit has planet Saturn.

Which of these is most likely a use of this model?

make the concepts about solar system more understandable
show the exact distances between objects in the solar system
reproduce every characteristic of the solar system accurately
prove that most theories about the solar system have loopholes

Answers

Answer:

A

Explanation:

It is likely used as a representation of the solar system to help visual learners understand better.

Answer:

A

Explanation:

Which of the following options best depicts the process of protein synthesis?

1. protein → RNA → DNA
2. DNA → amino acid → RNA → protein
3. DNA → RNA → protein
4. RNA → DNA → RNA → protein

Answers

During translation, the genetic code in mRNA is read and used to make a protein. These two processes are summed up by the central dogma of molecular biology: DNA → RNA → Protein.

A football is kicked by a player. The ball travels 50 m, to the west when it is caught by another player and that player travels 50 m, south. Create a vector diagram that shows both displacement vectors and the resultant displacement vector of the football.Use the scale of 1 cm of the graph paper = 10 m of motion.

Answers

Answer:

The football will hit the ground 2.11 seconds later.

Explanation:y = y0 + v0yt + ½ayt

2

0 = v0sin  t + ½ayt

2

0 = t(v0sin + ½ayt)

t = 0 or v0sin + ½ayt = 0

½ayt = – v0sin

=

−20sin

=

−2(18.0)sin(35.0°)

−9.8

explain how the cells, tissue, and organs within the circulatory system work together to enable it to perform its function of pumping materials around the body and removing waste products such as carbon dioxide.

Answers

Answer:

the body has levels of organization that build on each other.Cells make up tissues,tissues make up organs,and organs make up organs system.

Kerstin is getting ready to graduate high school. She wants to become a cardiac perfusionist. Which best describes the path she should take to her career?

Answers

Answer:

four-year degree , master’s degree , certification exam from ABCP

Explanation:

Answer:

She should do a four-year degree , master’s degree , certification exam from ABCP

Explanation:

What are some factors that can cause observed evolutionary change?

Answers

Answer:

There are four such forces: mutation, gene flow, genetic drift, and natural selection.

Explanation:

Answer:

natural selection, random genetic drift, mutation, population mating structure, and culture.

Explanation:

I hope this helps! ^^

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Hello My name Is Chloe, Do you think you can help me with My Question
I need Facts on sharks.
I'm doing a report for school.
Thanks:)

Answers

Answers:

Here are some fact about sharks that i found cool

#1

Possibly one of the most evolved sharks today are hammerhead sharks. They have an advanced sensory system and a body shape that has adapted to hunt specific prey

#2

Sharks may be one of the most important species on Earth. They have been maintaining our oceans for over 400 millions years.

#3

Sharks have evolved and changed much over millions of years. However many sharks today still share some of the features as sharks from millions of years ago.

#4

Sharks have been in our oceans for over 400 million years. Some of the earliest sharks were discovered dating back to the Devonian age.

#5

Sharks have survived five massive planet extinction events. These extinction events killed most life on earth and the last one around 65 million yeas ago killed the dinosaurs.

#6

There are over 500 species of shark.

#7

It is believed that each whale shark's pattern is unique, like a human's fingerprint.

#8

Sharks do not have bones. Instead, they have cartilage, that's what makes up human noses and ears

#9

According to the Smit.hsonian, there are over 500 known shark species, though many are endangered or declining due to various factors like overfishing.

#10

Your odds of getting attacked and killed by a shark are 1 in 3,748,067. In a lifetime, you are more likely to die from fireworks or lightning. Whereas over 100 million sharks are killed every year by humans.

#11

Whale sharks are the world’s biggest fish.

#12

Sharks mature slowly and reach reproductive age anywhere from 12 to 15 years.

#13

Hammerhead sharks' eyes are on the sides of their heads, so they have nearly a 360-degree sight line. Their panoramic view of the undersea world is inhibited by two blind spots, one in front of the snout and the other directly behind the head.

#14

Sharks predate the dinosaurs by 200 million years.

#15

Great whites can detect one drop of blood in 25 gal (100 L) of water and can sense even tiny amounts of blood in the water up to 3 mi (5 km) away.

(sorry if this took a lot of time but i had search somethings)

Have a nice day!

Answer:

Sharks do not have bones. ... Most sharks have good eyesight. ... Sharks have special electroreceptor organs. ... Shark skin feels similar to sandpaper. ... Sharks can go into a trance. ... Sharks have been around a very long time. ... Scientists age sharks by counting the rings on their vertebrae. ... Blue sharks are really blue.Sharks, in some form or another, have been around for 450 million years. ... There are over 500 species of shark. ... Sharks do not have bones. ... The whale shark is the largest fish in the ocean. ... Another shark species is the hammerhead shark, known for its distinct appearance.

Explanation:

Water, ice, wind, sand, and chemicals are constantly crumbling mountains, flattening hills, widening valleys, and deepening canyons. __________________ never stops

Answers

Answer:

erosion

Explanation:

which category of birds can find food on both land and large body of water

Answers

Answer:

A seabird can find food on both land and sea

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