At the end of which era did the dinosaurs became extinct?
1. Mesozoic
2. Paleozoic
3. Jurassic
4. Cenozoic

Answers

Answer 1

The Mesozoic era should be the correct answer

Answer 2

Answer:

the answer should b cenozoic


Related Questions

PLS HELP DUE TODAY! IF U ANSWER U GET BRAINLIEST!


In a mutualistic relationship...

A.

one organism benefits while the other is unaffected.

B.

both organisms benefit.

C.

one organism hunts and consumes the other organism.

D.

one organism benefits while the other is harmed.

Answers

B. both organism benefit

Only plants can photosynthesize, and only animals can perform cellular respiration
O True
O False

Answers

Answer:

false, plants and animals perform cellular respiration but only plants can photosynethesize.

Explanation:

Only plants can photosynthesize, and only animals can perform cellular respiration. The given statement is false.

What the process of cellular respiration involves?  

The process of cellular respiration involves the oxidation of biological fuels in the presence of an inorganic electron acceptor, like as oxygen, to generate significant quantities of energy that are used to power the major creation of ATP. The process of converting chemical energy from foods into adenosine triphosphate (ATP) in an organism's cells, followed by the discharge of waste products, is known as cellular respiration.

During catabolic processes, which divide big molecules into smaller ones and release energy, respiration takes place. One of the main mechanisms through which a cell produces chemical energy to power cellular activity is respiration. A sequence of biochemical stages, some of which include redox reactions, make up the total process.

Therefore, Only plants can photosynthesize, and only animals can perform cellular respiration. The given statement is false.

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Ive been stuck on this on You have a total of 46 chromosomes, 23 from each parent. *
true or false 1st is brainliest

Answers

No yes no yes no yes no yes

Answer:

yooooooooooooooooooooooooo

Explanation:

HELP!!!! Due in 1 hour.

Answers

It’s c then b then d then a

Answer:

1- A

2- B

3- D

4- C

Should be right

Explanation:

whats the point of biology

Answers

Answer:

just wait until chemistry you will miss bio

Explanation:

Answer:

Biology is the natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution. Despite the complexity of the science, there are certain unifying concepts that consolidate it into a single, coherent field.

Explanation:

have a great day

:)

What are the two factors that affect enzyme activity?

Answers

Answer:

temperature and concentration

Explanation:

I take biology

letter z most likely represents molecules of

Answers

Answer:

2) glycogen...................

Milk was added to a bottle of Coca Cola. Is this a chemical change or a
physical change? Explain your answer.

Answers

Answer:

Chemical Change

Explanation:

When a cola is diluted with milk the phosphoric acid in the soda. curdles the milk into little globs.

1. Proteins are one of the four main
types of
A.biomolecules
B.living
C.complex

Answers

Living is the answer of questions

How is our genetic material determined? Explain using what you know about heredity.

Answers

DNA, deoxyribonucleic acid, is the genetic material in your cells. It was passed on to you from your parents and determines your characteristics. The discovery that DNA is the genetic material was another important milestone in molecular biology

Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents

A tissue in a living organism is made up of one or more

Answers

Answer:

Tissues are made up of cells

Answer:

These are organisms that are made up of more than one cell. ... A group of cells can form a tissue—A group of tissues can make up an organ (such as a lung) —A set or organs can make up a system (such as a respiratory system)—and the systems can make up the organism

Hope this helps

Neurons that are i myelinated appear ___ which is what we call ____ matter
A. White:white
B.grey:grey
C. White:grey
D.grey:white

Answers

Answer:

A

Explanation:

If an organism is eukaryotic, many celled, can move and cannot make it owns food but must hunt or gather food, which kingdom would it be be placed into?

Answers

Answer:

Kingdom Animalia

Explanation:

An organism that is many-celled, can move, and cannot make its own food but must hunt or gather food would be placed in the kingdom Animalia.

Animals are generally heterotrophic, multicellular, and are able to move from one place to another. They ingest their foods and carry out digestion within their bodies and egest out undigested foods.

Animals are different from plants primarily in that they cannot make their own foods through photosynthesis. They are different from fungi in that they cannot carry out extracellular digestion of foods. Also, animals are different from bacteria and protists in that they multicellular rather than being unicellular.

please helpppppppppp

Answers

Answer:

2nd option is correct .

Explanation:

In Anaphase ii , sis chromatids separates and pulled towards the opposite sides of the cell.

Which of the following is true about chemical reactions?
A) Chemical reactions can create products (outputs) that are more complex than the reactants (inputs)
B) Chemical reactions involve changes in the energies of the molecules involved in the reaction
C) Organisms take in the matter and rearrange those atoms during chemical reactions.
D)Both A and B
E)All the Above

Answers

chemical reactions involve changes in the energies of the molecules involved in the reaction

During a chemical reaction, bonds are formed or breaked to make new products which may complex than the reactants. Energy changes can be happened in a reaction during rearrangement of atoms. Thus, all of the statements are correct.

What is a chemical reaction?

A chemical reaction is a chemical change occuring for matter where the atoms are regrouped into new products through bond making or bond breaking or both.

The change in energy during a reaction is called enthalpy change, where each reactant is associated with a standard energy and the energy may change with temperature or other external factor.

There may more than two reactants and some reactions are completing through several stages and may lead to complex products which are having entirely different properties from the reactants. Therefore, all the given statements about chemical reactions are correct.

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which statement best describes the role of plate tectonics in changes that occur on earth
A. the movement of plates builds pressure that is released during an earthquakes
B. convection currents in the mantle cause mountain ranges to slowly collapse over time
C. the subduction of oceanic crust cools the mantle and prevents volcanic eruptions
D. seafloor spreading causing ocean basins to get smaller and shallower over time

Answers

Answer:

A

Explanation:

Just took the quiz

The statement that best describes the role of plate tectonics in changes that occur on earth is that the movement of plates builds pressure that is released during an earthquake, which is option a.

What is plate tectonics?

Plate tectonics is the theory that explains the large-scale movements and interactions of the Earth's lithospheric plates, which make up the outermost layer of the Earth. These plates are made up of both the crust and the uppermost part of the mantle, and they move and interact with each other over time. The movement of plates is driven by convection currents in the Earth's mantle, which is the layer of hot, molten rock that lies beneath the crust. These currents cause the plates to move apart from each other at divergent plate boundaries, where new ocean crust is created.

Hence, the correct answer is that the movement of plates builds pressure that is released during an earthquake, which is option a.

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Imagine another universe that is completely empty except for a large solid sphere at rest. Suddenly, an identical sphere pops into existence 1 trillion kilometers away. What will happen?

Answers

can you coloborat ?

how do enzymes speed up chemical reactions
3 ways
also one of them is lower activation energy and idk what else

Answers

Answer:

Enzymes lower the activation energy of a reaction by...

making the molecules' transition state stableproviding alternate reaction pathwaysdestabilising substrates

Explanation:

Enzymes are complex, folded protein structures - in biological processes they facilitate chemical reactions.

Molecules usually collide at random, and specific chemical reactions (breaking and forming bonds) require the correct molecular orientation and energy to react. Enzymes..

provide an alternate reaction pathway with lower energy requirements. stabilize the molecules, keeping them in their transition states til they can react- these usually enter short lived, reactive and high-energydistort the substrate. These slightly alter their typical structures- bonds under stress are easier to manipulate and break, requiring less energy input for changes later on

Time and large amounts of energy, are needed to arrive at these orientations to allow the reactions to occur- this is a barrier called activation energy.

Thus, enzymes help by lowering the activation energy needed for the reaction (e.g. hydrolyzing a bond) to progress, and they increase the rate of chemical reactions.

2. Describe how adenine and thymine are related to each other.

Answers

Answer:

They are the nucleotide base pairings for DNA( Deoxyribose Nucleic Acid)

Explanation:

A->T

C->G

Answer:

Adenine always binds to thymine, while cytosine and guanine always bind to one another.

Explanation:

This relationship is called complementary bases paring. These complementary bases are bonded together via hydrogen bonds, which can be easy broken apart what the DNA need to unzip and duplicate itself

What molecule provides short term energy

Answers

Answer:

ATP

Explanation:

it's a molecule called ATP (adenosine triphosphate)

Answer:

Carbohydrate is the answer

The list includes six situations.
• A book sliding across a table at a constant speed
• A ball sitting on a shelf
• A can rolling down a ramp
• A swing moving back and forth
A car traveling at a constant speed of 15 m/s
• A bird landing on a branch
Which objects in the list experience an unbalanced force?
O A. The book, the ball, and the car
B. The ball, the car, and the bird
O C. The can, the swing, and the bird
D. The book, the ball, the can, and the swing
Look

Answers

Answer: C

Explanation:

Answer:

ccccccc

Explanation:

A hand sanitizer was advertised to be more effective at killing bacteria than any antibacterial soap. Students were split
evenly into 4 groups test this claim. Groups 1-3 washed their hands using the assigned hand sanitizer or soap (see
table) and warm water for two minutes, and then dried their hands with a paper towel. Group 4 rubbed their hands
vigorously for 2 minutes in warm water, without any soap or sanitizer, and then dried their hands with a paper towel.
After washing, each student’s hands were swabbed and the swab was applied to a culture plate and incubated. Finally,
the bacterial cultures were counted.

Treatment Bacteria Growth (# of bacteria)
Group 1: Hand sanitizer 28
Group 2: Soap A 12
Group 3: Soap B 13
Group 4: Warm water 24
A. What are the independent and dependent variables in this experiment?
B. Based on the claims of the hand sanitizer advertisement, what was the hypothesis for this experiment?
C. What is the control group?
D. What are 3 constants?
E. Based on the results in the data table, was the advertisement supported or refuted/rejected? Explain your answer.

Answers

Answer:

A) IV: Hand Sanitizer/Soap ; DV: #of bacteria

B) Hand Sanitizer is more effective in killing bacteria than Hand Soap.

C) Group 4 since they used neither product

D) Group 1, Group 2, and Group 3

E) The advertisement was rejected, because Hand Sanitizer was supposed to kill more bacteria, when in reality the Hand Soap did.

Explanation:

Hope this Helps!!

:D

Fossil fuels are formed in the geological past from the remains of living organisms. Petroleum products, such as coal and natural gas are considered fossil fuels. Why are these types of fuels considered NONrenewable?

Answers

Answer:

you cant easily create more fossil fuels in a relatively short amount of time. it usually takes thousands of years.

Explanation:

Help. During which phase of meiosis could an error result in trisomy and how?
А
Prophase l- an error during crossing over pulls an extra chromosome to one side of the cell
B
Metaphase 1- an error when spindle fibers attach results in an extra chromosome being created
Anaphase l- an error during random assortment pulls an extra chromosome to one side of the cell
D
Telophase l- an error when the nuclear membrane forms, it results in an extra chromosome being created

Answers

Answer: D

Explanation:

Just D.

PLEASE I NEED HELP OR IM GOING TO FAIL- 50 POINTS

Select from the drop-down menu to correctly complete the statement.

Different types of cells within an organism


A- sever a diffrent fuction

B- do not have any function

C- can survie all on their own

D- are all the same

Answers

A. serve a different function
A is the correct function, for example cells that makes up your liver perform the duties of a liver like filtering blood, while cells in your heart focus on helping the heart contract and relax.

What is the weight of a book that has a mass of 0.35 kg?

Answers

Answer:

3.5 N

Explanation:

The weight of an object can be found by using the formula

W = mg

m is the mass

g is the acceleration due to gravity which is 10 m/s²

From the question we have

W = 0.35 × 10

We have the final answer as

3.5 N

Hope this helps you

Answer:

4 pounds

Explanation:

i guesed

After a community is disrupted by a large-scale event, such as a forest fire, a new community is established through
which process?
a. climax succession
b. secondary succession
c. primary succession
d. soil formation

Answers

It is the process of one community replacing another as a result of changing abiotic and biotic factors is called ecological succession. IT begins with no life,only bare rocks and no soil present.

After a community is disrupted by a large-scale event, such as a forest fire, a new community is established through secondary succession The correct option is b.

What is secondary succession?

Secondary succession occurs when a disturbance affects a climax or intermediate community. This restarts the succession cycle, but not all the way back to the beginning soil and nutrients are still present.

When the severity of a disturbance is insufficient to remove all of the existing vegetation and soil from a site, secondary succession occurs.

Secondary succession can be initiated by a variety of disturbances, including fire, flooding, windstorms, and human activities (for example, logging of forests).

Tropical forests gain structural complexity, taxonomic diversity, and functional diversity during secondary succession.

These changes result in the accumulation of carbon and nutrients in aboveground vegetation, as well as the creation of habitat for forest animal species.

Thus, the correct option is b.

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How does a blind person know when they are done wiping?

please answer asap Yesterday i was hit in the eye with a baseball and two hours ago i was hit in the other eye with a football. now im blind in both eyeballs and im also stuck on the toilet please answer asap!!!$!

Answers

Answer:

they sniff it probably

Taste test, always works for me

Why can't blue whales get cancer?

Answers

Answer:

Because it is so big the mutated cell is harmless to them because of teir cell count

Explanation:

Answer:

Even though larger animals like elephants and blue whales have up to 100 billion more cells than humans in their bodies — and therefore many more chances for harmful mutations to develop — they are much more immune to cancer.

Explanation:

Which statement describes the damage that results from earthquakes?

Answers

Answer: people lose their homes, buildings collapse, people need to evacuate, etc.

Explanation:

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