1. What force, created when two surfaces rub together,
makes it difficult to drag a large object across the
ground?
A gravity
B friction
C lift
D drag
2. Which of the following do many scientists think
caused the extinction of the dinosaurs?
A an asteroid
B freezing temperatures
C wildfires
D all of the above
3. All lobster shells contain __________, compounds that
give lobsters their color.
A melanin
B DNA
C pigments
D dye
4. Nitrogen dioxide, a major air pollutant, is a gas
produced mainly by __________.
A cars
B cow farts
C factories
D wildfire smoke
5. The most common cause of concussions among high
school football players is __________.
A contact with another player
B hitting the ground
C crashing into equipment
D practicing too hard
6. __________ of the elements on the periodic table are
found in nature.
A 100%
B Around 75%
C About 50%
D Less than 50%
7. Emeralds form when elements in __________ are
heated and pressed together.
A rocks
B Earth’s crust
C Earth’s core
D lava
8. Lobsters usually have brown shells, but some can be
different colors due to __________.
A an adaptation
B a mutation
C an environmental factor
D a change in pH
9. During which time of year is air pollution the highest
in London?
A Summer
B Spring
C Winter
D Fall
10. Dinosaurs became extinct about __________ years
ago.
A 65 million
B 6.5 billion
C 65,000
D 6,500

Answers

Answer 1

Answer:b friction

Explanation:


Related Questions

Which part of the teenage brain is still developing prefrontal cortex temporal lobe occipital lobe limbic system

Answers

Answer:

amygdala

Explanation:

Because the prefrontal cortex is still developing, teenagers might rely on a part of the brain called the amygdala to make decisions and solve problems more than adults do. The amygdala is associated with emotions, impulses, aggression and instinctive.

The prefrontal cortex is the part of the teenage brain that is still developing. Thus, the correct option is A.

What is the Prefrontal cortex?

The prefrontal cortex may be defined as a region of the brain that is located at the front of the frontal lobe. It performs a variety of functions like planning, personality development, etc. in the life of an individual.

The prefrontal cortex is developing till the completion of adulthood or may be up to the age of 30 to 35.

During this time, teenagers are completely dependent on the part of the brain known as the amygdala which plays functions similar to the prefrontal cortex in teens.

Therefore, the prefrontal cortex is the part of the teenage brain that is still developing. Thus, the correct option is A.

To learn more about the prefrontal cortex, refer to the link:

https://brainly.com/question/24171355

#SPJ5

1. Is genetic modification a helpful application of technology that makes plants resistant to pests and disease while improving nutritional value?
2. Is genetic modification an unnatural tinkering with our food supply that lacks sufficient regulation and oversight?

Answers

Answer:

Yes genetic modifications is a helpful application of technology that makes plants resistant to pests and disease while improving nutritional value

Explanation:

plz give me brainiest

In order to replicate behavior, one must retain it in memory. True or false?

Answers

Answer:

True

Explanation:

"One must retain behavior in memory in order to duplicate behavior," is a true statement.

What is a long term memory?

Memory can be divided into two distinct classes: short-term and long-term.

Memory for the long termMemory in the near term

After the information has been encoded in the appropriate manner, it is stored in the long term memory for use at a later time. As a consequence, the assertion that "in order to repeat behavior, one must retain it in memory" is validated as being correct.

Learn more about long term memory, here:

https://brainly.com/question/16009462

#SPJ6

Predict :What do you think the offspring of a red chicken and a white chicken will look like?

Answers

Answer: I predict that if they follow a dominant/recessive inheritance pattern, they will most likely be red.

Hope this helps!! :D

Answer:

I predict that if they follow a dominant/recessive inheritance pattern, they will most likely be red.

Explanation:

Scientists are studying the evolution of the sloth. They have fossils from 30, 20, 15 and 10 million years ago. Which fossil is most similar the the modern-day sloth? *

Answers

Answer:

30 million years ago

Explanation:

Sloths are slow moving animals and are also cute animals. These animals are  mostly found in Central America and South America.

From many many million years sloths have lived on this planet. Sloth have evolved from elephant size to moose size in the past few million years. But scientist have known very little about their nature and about their species.

There are about many fossils from 30 million years to 10 million years but recently scientist have discovered that the fossils of sloth from the 30 million years ago are similar to the modern day sloth.  

uses strong magnetic fields to show a cross section of
a body part and can show both soft tissues and dense tissues. Cross sections can
be combined by computer to give a complete image of the whole area.

Answers

Answer:MRI (magnetic resonance imaging)

Explanation:

How do the circulatory system and immune system work together to respond to an injury?

Answers

Answer:

The number of white blood cells in the blood can increase during an immune response. These cells travel through the circulatory system and the lymphatic system to an injured or infected area of the body. White blood cells leave the blood vessels and travel into the damaged tissue, where the immune response takes place.

Distinguish between voluntary and involuntary actions.

Answers

GREETINGS!_____________________________________

ANSWER:

DEFINITIONS_____________________________________VOLUNTARY MUSCLES:

Voluntary muscles are those muscles which work under our conscious control and can be controlled at will also we can choose choose them when to use and when not to use. These are simply SKELETAL MUSCLES attached to the bone, so all the movements of hand and legs and whatever u do are because of voluntary muscles.

__________________________________________________INVOLUNTARY MUSCLES:

the muscles in the human body that do not work under our will and we cant control them. They are mainly controlled by the autonomic nervous system in the body. So, involuntary muscles include all the muscles whose activity which is not controlled by our NERVES. They are also called SMOOTH MUSCLES since they are present as the visceral layer over the organs.

_____________________________________DIFFERENCES

1)      VOLUNTARY MUSCLES are under our control but INVOLUNTARY                 MUSCLES are not under our control

2)      VOLUNTARY MUSCLES are also known as skeletal muscles but INVOLUNTARY MUSCLES are also known as smooth muscles

3)      VOLUNTARY MUSCLES are attached to the bones in the body, but INVOLUNTARY MUSCLES are attached to the soft hollow internal organs.

4)      VOLUNTARY MUSCLES are controlled by the somatic nervous system. INVOLUNTARY MUSCLES are controlled by the autonomic nervous system.

5)      VOLUNTARY MSUCLES  require more energy. INVOLUNTARY MUSCLES require less energy.

_____________________________________HOPE THIS HELPS!

Label the model to show the process of photosynthesis.

Answers

Answer:

Starting at the top where the line is pointing at the green thing going right.

O2SugarChloroplast Calvin cycle CO2H2OGranum ADPRadiant Energy

Explanation:

The steps of the process of photosynthesis are:

oxygenSugarChloroplastCalvin cycleCarbon dioxidewaterGranumADPRadiant Energy

What is photosynthesis?

Photosynthesis is the process of converting light energy into chemical energy. It occurs in the organism containing chlorophyll because chlorophyll traps the sunlight for the reaction.

The steps included in the photosynthesis are added in the image below

Thus, the steps of the process of photosynthesis are:

oxygenSugarChloroplastCalvin cycleCarbon dioxidewaterGranumADPRadiant Energy

Learn more about photosynthesis, here:

https://brainly.com/question/1388366

#SPJ2

HELPPPPPPPP!!!!!!!!!!!!!!

Answers

Answer

Heterozygous i think

Explanation:

Human cells have 46 chromosomes. Each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere. Once the chromosome has split, each chromatid is called a daughter chromosome. At the end of cytokinesis, how many daughter chromosomes will be found in each cell? Explain.

Answers

Answer: 2

Explanation:

Each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. Human cells have 46 chromosomes. Each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.

At the end of cytokinesis, there will be 46 daughter chromosomes in each cell.

MITOSIS:Mitosis is the type of cell division that results in two daughter cells that are genetically identical to one another.

According to this question, human cells possess 46 chromosomes, which divides during mitosis into daughter chromosomes called chromatids.

Therefore, after cytokinesis, 46 daughter chromosomes will be present in each cell in order to maintain the chromosome number of the parent cell.

Learn more about mitosis at: https://brainly.com/question/13536882

Which of the following is NOT one of the four systems into which scientists divide earth

A.biosphere
B.hemisphere
C.geosphere
D.hydrosphere

Answers

Answer:

Should be D

Explanation:

The one that is not one of the four systems into which scientists divide earth is hemisphere. The correct option is B.

What are the spheres of Earth?

The four main subsystems of the Earth are the land, the water, the living beings, and the air. The term "spheres" refers to these four subsystems.

They are the "geosphere" (land), "hydrosphere" (water), "biosphere" (life) and "atmosphere," specifically (air).

The biosphere, geosphere, hydrosphere, and atmosphere are the spheres. Together, they are in charge of establishing and preserving the Earth's climate, geological processes, and life.

The main significance of the hydrosphere is that it supports a variety of life forms, is crucial to ecosystems, and regulates the atmosphere. All of the water on the Earth's surface is covered by the hydrosphere.

Thus, the correct option is B.

For more details regarding spheres of Earth, visit:

https://brainly.com/question/24215268

#SPJ6

What provides the set of guiding principles for managing wildlife resources?
Seven Rules for Fair Chase
Seven Sisters of Habitat Reconstruction
North American Free Trade Agreement
North American Model of Wildlife Conservation

Answers

Answer:

North American model of wildlife conservation

Explanation:

North American model of wildlife conservation provide the guiding rules because it was created in the 19th century to provide set of building rules to guide the management of wildlife and conservation in the United States and Canada on the best decisions to take in wildlife management.

It was created due to increase in Extinction of wildlife species and increase in sportsmen.

The correct answer is The North American Model of Wildlife Conservation provides a set of guiding principles for managing wildlife resources, which is the last option, as the North American Model of Wildlife Conservation is a framework that originated in North America and is widely recognized as a successful approach to wildlife management.

Wildlife belongs to all citizens and is managed by government agencies on behalf of the public. The model promotes the elimination of market hunting and the commercial exploitation of wildlife. Wildlife resources are allocated and regulated through laws and regulations to ensure equitable access and sustainable use.

Learn more about wildlife here.

https://brainly.com/question/32036674

#SPJ6

Which of the following hazards oan severely harm a worker's lungs?
A. excessive noise
B. heat exposure
C. vehicle hazards
D. bins and silos

Answers

Answer:

I think that this might be your answer :) I tried hope this helps !

Explanation:

A) Heat exposure Because In terms of weather Heat:  Inhaling hot air, induces airway constriction making it difficult to breathe.

Also Of course, it's known that smoke from fire can have a terrible effect on your lungs. It can restrict oxygen flow, which can and most likely be deadly. So the exposure to the heat will distract them cause they cant breath while they work .

How is radioactive decay related to radiometric dating

Answers

Radiometric dating, often called radioactive dating, is a technique used to determine the age of materials such as rocks. It is based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.

Answer:

Radiometric dating, often called radioactive dating, is a technique used to determine the age of materials such as rocks.

Explanation: It is based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.

How many amino acids are present in a protein that requires 3,000 bases in its code?​

Answers

Answer:

1,000 amino acids

le Which two structures produce energy that cells can use? A and B, B and C, C and D, D and A​

Answers

D and A are the answers

Answer:

Your answer would be: D. D and A.

Explanation:

Have a good day.

A red blood cell is 8 um in diameter.
A bacterial cell is 40 times smaller.
Calculate the diameter of the bacterial
cell.
Tick one box.
0.02 um
0.2 um
2.0 im
20.0 cm

Answers

Answer:

0.2um

Explanation:

take each of the answers multiply by 40 and see which the answer is 8um

0.2×40=8um

The diameter of the bacterial; cell would be 0.02 micrometer therefore the correct answer is option A.

What is the scale factor?

It is defined as the multiplication factor used for the design of an object with respect to some other object. the scale is generally used to design prototype designs of large objects.

It is multiplied by the design dimension to get the actual size of the object or product.

As given in the problem A red blood cell is 8 micrometers in diameter. If a bacterial cell is 40 times smaller, then we have to calculate and calculate the diameter of the bacterial cell.

scale factor = 40

diameter of the bacterial cell = 8 micrometers/40

                                                 = 0.02 micrometers

Thus, the correct answer is option A.

To learn more about scale factors from here,

brainly.com/question/507867

#SPJ2

ok this is the last one

Answers

Answer:

Compound sentence

Explanation:

it uses a conjunction to add the to sentences together.

What does an organism's genotype describe?

the allele combination for a trait
the physical appearance of a trait
the number of alleles on a gene
the number of different traits inherited

Answers

Answer:

the allele combination for a trait

Explanation:

The genotype describes which alleles (versions) of a gene an organism has. Diploid organisms, such as humans, have two copies of each gene. Sometimes these alleles are the same and the individual is h0m0zygous for that gene. If they are different, the individual is heterozygous for that gene.

The physical appearance of a trait is the phenotype.

Answer:

The answer is A.

Explanation:

I don't know for sure but I will come back and tell u if it is right after my quiz...

Tell me the answer so hard

Answers

Answer:

Her arms are puffy, red, and swollen

Explanation:

It's a sign because you can physically see the condition of her arms.

Answer:

What you have picked is the correct answer

Explanation:

pulling the weeds, crying, and telling you that it hurts is not necessarily a sign to what to recommend to the mother of the little girl so she gets better.

This one strawberry plant is sending out a runner that grows into another strawberry plant. What type of reproduction would this be? This one strawberry plant sends out a runner and another strawberry plant begins to grow. What type of reproduction is this?

a. sexual reproduction


b. asexual reproduction


c. neither, plants don't reproduce.

Answers

I think it’s B. Strawberry’s can be propagated asexually by allowing plantlets on the end of runners.
The answer is B) asexual reproduction.

Strawberries reproduce asexually. I know this because I learned this last year!

Hope this helps!

Which of the following is true about the structure of DNA and RNA?
A. DNA and RNA have the uracil nitrogen base.
O
B. DNA is single stranded and RNA is double stranded.
O
C. DNA and RNA have a deoxyribose sugar.
O
D. DNA has thymine and RNA has uracil.

Answers

Answer:

Dna and RNA have a deoxribose sugar

The statement (D) is correct. DNA has thymine and RNA has uracil.

What is DNA and RNA?

DNA and RNA are both types of nucleic acids, large molecules that are made up of monomers called nucleotides. Nucleic acids are used to store genetic information, which the cell uses to make proteins.

Moreover, nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), carry genetic information which is read in cells to make the RNA and proteins by which living things function. The well-known structure of the DNA double helix allows this information to be copied and passed on to the next generation.

Hence, DNA is a double-stranded molecule that has a long chain of nucleotides. RNA is a single-stranded molecule which has a shorter chain of nucleotides. DNA replicates on its own, it is self-replicating. RNA does not replicate on its own.

Learn more about DNA and RNA:

https://brainly.com/question/19842534

#SPJ2

Convergent plates move _________ each other. This causes _______ to form as well as volcanoes.
A.
toward, mountain ranges
B.
away from, volcanoes
C.
toward, rifts
D.
away from, mountain ranges

Answers

Answer:

A.

toward, mountain ranges

Explanation:

A. Toward and mountain ranges

I need help with this IMMEDIATELY I will give 20 points and give a brainliest answer if someone answers it. PLZ HELP ME NOW!!! WITH BIOLOGY!!!

Answers

I only know part B and it is sexually reproducing cells need both genders and Asexual cells only need one

Which of the following pieces of equipment is NOT allowed to be taken into a contest?
O Clear plastic clipboard
O Measuring tape
O knife
Towel

Answers

Answer:

i think a knife or Measuring tape

Explanation:

how does DNA polymerase prevent mutation?

Answers

Answer:

It checks DNA for errors during replication.

Explanation:

Hope this was helpful.

Answer: It checks DNA for errors

Explanation:

A-pex

Cytoplasm is liquid that keeps the cell _________.
A: moving
B: airy
C: solid

Answers

Answer:

I think the cytoplasm keeps the cell solid.

Explanation:

Cytoplasm keeps all the cellular organelles suspended. The cytoplasm helps to keep them in place. It is also the site of most metabolic activities in the cell, and it allows materials to pass easily throughout the cell.

The cytoplasm is the liquid that keeps the cell solid. The correct option is C.

What is cytoplasm?

The cytoplasm is a liquid that is filled inside the cell. Between the cell membrane and the nucleus, there is a jelly-like fluid called cytoplasm. It facilitates material exchange and storage among cell organelles.

Cytoplasm helps the cell to stay still and rigid. It places all the cell organelle into a fixed place and the transfer of ions and molecules is also done by the cytoplasm. It is made up of water, salts, and other various material.

They help in the coming in of the materials and going out of the materials. They also protect the cell from shock and other invasive, they make the cell rigid and flexible and also protect recall from each other.

Thus, the correct option is C. solid.

To learn more about cytoplasm, refer to the below link:

https://brainly.com/question/13841988

#SPJ2

What is glycogen and what is it used for?

Answers

Answer:

This stored form of glucose is made up of many connected glucose molecules and is called glycogen. When the body needs a quick boost of energy or when the body isn't getting glucose from food, glycogen is broken down to release glucose into the bloodstream to be used as fuel for the cells.

will give brainlist​

Answers

A is the answer I think :)
Other Questions
back again 3(11x + 5) = 279 Veronica observes how the force of friction causes an object to slow down. She writes the following observation: When an object moves across a smooth surface, there is less friction created than when an object moves across a rough surface. When the object stops moving, friction is created. Which statement corrects the error(s) in Veronica's observations? It is not smooth or rough surfaces that affects friction. It is the size of the push. When an object moves across a rough surface, there is no friction. When an object moves across a smooth surface, the friction increases. When an object stops moving, there is no friction. free brainlyist if you answer this question. How Can We Solve Local Problems? Solve for X.Just type the number only, the answer is a positive whole number Find the 54th term of the arithmetic sequence 2,-8,-14, ... Which phrases from the first stanza of the poem illustrate the use of imagery? Check all that apply. Chicago " it is snowing softly " "and a man has just " "he steps into the twilight " "carrying a wrinkled shopping bag" write an article that explains the differences between the education of white children and the education of the black children in united state before 1954 Colonists challenged British taxes effectively by boycotting british goods. (TRUE OR FALSE) answer with true or false. thanks. what is a art related question What is the role of friction when ; a boats engine stops What is the slope of the line that passes through the points (-6,-4) and(-12, 4)? Write your answer in simplest form. Tina and Zion earn $38 per week for delivering newspapers. Tina worked for x weeks and earned an additional total bonus of $15. Zion worked for y weeks. Which expression shows the total money, in dollars, that Tina and Zion earned for delivering newspapers? (1 point) Question 3 options: 1) 53x + 38y 2) 38x + 15 + 38y 3) 38x 15 + 38y 4) 38x + 53y A jogger runs 6km north, 5km east, then another 4km north. Her average speed is 8 km/h. How long will it take her to complete her run? Please help- I cannot get this wrong Publishers often add _____ to a text to help readers understand the meaning of old words.A.usage guidesB.footnotesC.current-day translationsD.context What caused the end of the Hellenistic Age? A. The death of Artistotle.B. The Rise of the Roman empireC. The fall of persia D. The death of Alexandria the great what is -2(15 5) + 7(-2) People who opposed Alexander Hamiltons plans to improve the economy - did not want a strong federal government.did not want a strong federal government.wanted the nations capital to be in the North.wanted the nations capital to be in the North.lived in states with a lot of war debt.lived in states with a lot of war debt.wanted weak state governments. Which is the correct definition for an ecosystem? Using the digits 1, 2, 3, 4, 5, 6, 7, and 9, make 4 two-digit prime numbers. What is the sum of those four prime numbers?