8th grade science second page

8th Grade Science Second Page

Answers

Answer 1

Answer: Part A. 1. 159.5mm, 3. If they go 16cm per 29 years it would take 90 years to go 50cm 4. probably because the earthworms don’t go below 1 meter deep so rocks don’t go deeper.

Explanation:


Related Questions

XBXь х Хү
What is the probability that this couple will have a colorblind son?

Answers

Answer:

2

Explanation:

Identify the parts.
A. Stigma
B.
C. Sepal
D.
F.
H.
J.
K.
L.
O.
P.

Answers

Answer:

A. anther

B. receptacle

C. sepal

D. petal

F. filament

H.

J.

K. pollen tube

L.Ovary

O. Ovule

P. Style

* I'm confused with H and J

When you were born you were 22 inches long now you were about 60+ inches long how do you account for this 40+ inches of growth?

Answers

You account as in you count. If you get what im saying here, you must first use the multiplayer equation.

which of the following element is not present in proteins

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Answer:

Protein: a compound made of amino acids. Each amino acid is made of carbon, hydrogen, oxygen, and nitrogen. Most proteins also include sulfur.

Which means the only choice left is helium

i hope this is the answer you are looking for

Creating RNA from DNA

Answers

Cells make RNA messages in a process similar to the replication of DNA. The DNA strands are pulled apart in the location of the gene to be transcribed, and enzymes create the messenger RNA from the sequence of DNA bases using the base pairing rules. 3. RNA molecules made in a cell are used in a variety of ways.

that's some cool stuffffp

Ferns tend to live in which of the following habitats?"
moist and sunny
moist and shady
O dry and sunny
Odry and shady

Answers

Answer:

Moist and shaddy

Explanation:

moist and shady
hope it helps

Why is the sea otter's diet of seafood a problem with some of the fisherman?

Answers

Answer:

Sea otters, because of their eating habits, are considered a “keystone predator,” predators that keep the ecosystem balanced. ... When not enough otters are around to eat the sea urchins, the urchin colonies grow unchecked and “urchin barrens” increase.

Explanation:

Division creates 2 types of B Cells: _________________ and Memory B Cells

Answers

Lymphocyte is the anwer

Answer:

Hello There!!

Explanation:

The answer is plasma cells.

hope this helps, have a great day!!

~Pinky~

I will give brainlies if you answer correctly and give an explanation!

Regular periods of overeating followed by self-induced vomiting are associated with which physiological disorder?
A. Anorexia
B. Bulimia
C. Obesity
D. Parkinson's

Answers

Answer:

B. Bulimia

Explanation:

See below for a description of each case:

Anorexia (also known as Anorexia nervosa) is an eating disorder characterized by abnormally low body weight. It's similar to the starving of oneself to achieve lower weight, but this is unhealthy. It's very common (more than 3 million cases per year in US) and is treatable. This can last for several months or years and is more common in females from ages 18–35.

Some symptoms include:

Extreme weight loss

Thin appearance  

Fatigue and insomnia  

Bluish discoloration of the fingers

Hair that thins, breaks or falls out  

Amenorrhea (absence of menstruation)  

Dry or yellowish skin  

Dehydration

Bulimia (also known as Bulimia nervosa) is an eating disorder characterized by binge eating, followed by methods to avoid weight gain (ie. vomiting). It's very common (more than 3 million cases per year in US) and is treatable.  It can last several years or be lifelong and are more common in females from ages 18–35.

Some symptoms include:

Binge eating

Forceful vomiting

Long-term fear of gaining weight  

Overuse of laxatives or diuretics

Use of supplements or herbs for weight loss

Excessive exercises

Stained teeth (from stomach acid)

Obesity is a condition characterized by abnormal or excessive fat accumulation. It's extremely common (more than 3 million cases per year in US) but is treatable. It can last several years or be lifelong. Family history may increase likelihood for some types.

Some symptoms include:

Above average body weight  

Sleep apnea- a condition in which breathing is irregular and periodically stops during sleep  

Skin problems caused by moisture that accumulates in the folds of your skin  

Osteoarthritis in weight-bearing joints, especially the knees

Parkinson's disease is a chronic and progressive movement disorder, meaning it weakens the control of movements of the body over time. It's fairly common (more than 200,000 cases per year in US). There are treatments to manage the condition but there is no known cure. This can last several years or be lifelong. It's more common in 60+ years old males.

Some symptoms include:

Tremors, trembling of hands, arms, legs, jaw and face

Stiffness of the arms, legs and trunk

Slowness of movement

Poor balance and coordination

Speech difficulty

Write an example of DNA before and after a point mutation

Answers

Answer:

An example of DNA is the chain of basic materials in the chromosomes of the human cell.

After mutation, the DNA sequence is changed.

Can someone plz help me out. I don’t really understand this.

Answers

7. b and 8. c i attached the photo for u to see how i did it

After eating a sugary snack, a person's blood sugar
level may rise for a short period of time. Which
statement describes the body's way of restoring
homeostasis?
A. The brain will stimulate the body to sweat
in order to increase blood sugar levels.
O B. The brain will stimulate the cells to produce
more sugar, increasing blood sugar levels.
C. The brain will stimulate the cells to
maintain the elevated blood sugar levels.
O D. The brain will stimulate the release of a
chemical that will lower blood sugar levels.

Answers

The answer should be D.

What is the condition of outside air a certain time and place

O Climate zone

O Weather

O Climate

O Element

Answers

the would have to be weather

In order for natural selection to occur, there must be variation within the population. Which statements are an accurate reflection
of the relationship between natural selection and variation in the population? Select ALL that apply.
A)
Mutations are caused by natural selection.
B)
Mutations are a source of variation within any population.
Genetic variation is increased in populations with sexual reproduction.
D)
Genetic diversity is decreased overall by the mechanism of natural
selection
E)
Natural selection lowers the population size but maintains the genetic
variation in a population.

Answers

Answer:

the correct answer is b, c, d

Explanation:

i just took the quiz on usatestprep

The correct answer is (B) and (C)

What are Mutations?

Mutation is a change in the DNA sequence in any organism.Mutation will cause the formation of new nucleotide sequence resulting in genetically diverse population.

learn more about mutations below,

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Bacteria Natural Selection

Answers

Answer:

Bacterial resistance arises through the simple process of natural selection. Bacteria divide rapidly, but DNA replication is imperfect. In the presence of antibiotics, while most bacteria are killed, a small number of resistant mutants may survive and take over.

Explanation:

When bacteria are initially exposed to an antibiotic, those most susceptible to the antibiotic will die quickly, leaving any surviving bacteria to pass on their resistant features

P S Q R The biological levels of organization range from a single organelle all the way up to the biosphere in a highly structured hierarchy. Multicellular organisms are organized from the simplest to most complex: cells, tissues, organs, organ systems, organisms. Evaluate the model above. Select ALL of the statements that accurately depict the examples shown in the model. A) R shows an animal cell. B) O shows types of tissue. P shows organs in the endocrine system. D) P shows an organ system, the digestive system. E) S shows an organ system, the digestive system.​

Answers

Answer: the red thing pretend is blood and blue thing is water you first ta

Explanation:

Answer:

A) R → Q → P → S

Explanation:

I just took the test on USA Test Prep

1 point
7.A tree has organs that carry out specific functions needed for survival.
What function do the tree's leaves carry out? *

A)act as reproductive structures

B)capture sunlight to make food

C)take in dissolved minerals

D)anchor the tree underneath the soil

Answers

Answer:

C sorry if im wrong

Explanation:

.

Why do the temperatures change over the months?
O A. Because the Moon is tilted on its axis, it reflects more sunlight on Earth during different times of Earth's yearly orbit.
B. Because the Sun is tilted on its axis, parts of Earth get more sunlight during different times of Earth's yearly orbit.
O C. Because Earth is tilted on its axis, the stars reflect more light during different times of the Earth's yearly orbit.
D. Because Earth is tilted on its axis, parts of Earth get more hours of sunlight during different times of Earth's yearly orbit.

Answers

Answer:

Answer

Explanation:

B because the more the sun is titled the more heat=different season.

Because Earth is tilted on its axis, parts of Earth get more hours of sunlight during different times of Earth's yearly orbit. As Earth orbits around the Sun, its axis is tilted at an angle of about 23.5 degrees. Hence the correct option is D.

Why do the temperatures change over the months?

The temperatures change over the months primarily because of Earth's axial tilt. As the Earth rotates around the sun, the angle at which sunlight hits different parts of the Earth changes.

This is because the Earth's axis is tilted about 23.5 degrees relative to its orbit around the sun. When a particular hemisphere is tilted toward the sun, it receives more direct sunlight, resulting in warmer temperatures.

Conversely, when that hemisphere is tilted away from the sun, it receives less direct sunlight, resulting in cooler temperatures. This cycle repeats itself annually, causing changes in temperatures over the months.

Hence the correct option is D.

To know more about Earth's axis:

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All matter has the same properties.
A.True
B.False

Answers

Answer:

True

Explanation:

Answer:

False.

Gaseous matter is non-visible, solid and liquids are visible--already making them different. All matters (including the 4th matter) have different chemical and physical properties.

Pls help meeee I’m stuck and thank you so much

Answers

Answer:

The answers is b

Please help and thank you whoever you are

Answers

i believe it’s 2. the suns radiation provides heat to the earth sorry if i am wrong

What are three of the products whales are hunted for by the whalers and their substitute products?

Answers

I know that they are hunted with Whale oil

Hi! Could You Help Me? - Pick A Scenario That You Believe Will Have The Greatest Impact On A Food Web In Your Local Ecosystem And Explain -

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3: Trees are very eco friendly and they are what help us breathe natural air. They have a impact in a pro and con way. Pro, they build more stores, homes, and things we need in those spaces. Con: They are killing our fresh air and we don’t need that. The world is already going through disasters, and we are getting animals extinct.

Describe asexual reproduction in your own words

Answers

Explanation: person,organism. that has no sexual feeling or thoughts about it  

Answer:

Asexual reproduction is the process where an organism gives life to an identical genetic offspring, multiplying themselves

Explanation:

Which of these statements about constellations are true?


Constellations are always changing and may form new images.

Constellations are groups of stars that form patterns in the night sky.

Constellations are groups of stars that can be seen in specific areas of the night sky.

Each constellation has a story about what it means or represents.

Answers

I going with A hope that helps

The statements which are true about constellations are as follows:

Constellations are groups of stars that form patterns in the night sky.Each constellation has a story about what it means or represents.Constellations are always changing and may form new images.

Thus, the correct options for this question are A, B, and D.

What do you mean by Constellations?

Constellations may be defined as clusters of stars that form a recognizable pattern and were imagined in order to construct noticeable and apparent configurations of objects or creatures in the sky, especially at night.

These groups of stars are also present in the day but they are not perceived due to the extremely high light of the sun. So, they form patterns in the night sky. These groups of stars are not specifically present as they are distributed randomly and can form new images.

Therefore, the correct options for this question are A, B, and D.

To learn more about Constellations, refer to the link:

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Which of the following sentences are the best short summary for a flashlight?A A flashlight flashlight has has many many uses.uses.A A flashlight flashlight is is able able to to create create light light energy, energy, which which allows allows us us to to see see in in the the dark.dark.A A flashlight flashlight is is a a necessary necessary tool tool for for every every household.household.A A flashlight flashlight is is a a portable, portable, battery-battery-operated operated device device that that makes makes light.light.

Answers

Answer:

The last one

Explanation:

Flashlight is a portable, battery-operated device that makes light.

A flashlight is a portable, battery operated device that makes light is the best short summary for a flashlight.

What are the features of flashlight?

A flashlight or torch is a portable hand-held electric lamp. Formerly, the light source typically was a miniature incandescent light bulb, but these have been displaced by light-emitting diodes since the mid-2000s.

The three main features for a flashlight are Dimensions, Battery, and Light. Each of these characteristics are very important when it comes to selecting a flashlight.

Flashlights are used as a light source outdoors, in places without permanently installed lighting, during power outages, or when a portable light source is needed.

Learn more about flashlight:

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The ecosystem with the greatest sustainability will be the one that has the

Answers

Answer:

Different organisms or animals

Explanation: In a ecosystem, if you have different animals or organisms, it give them a better chance of survival, reason being that they can choose to eat whatever animal or organism they want because there is lots of animals to choose from the ecosystem. Basically the more diversity you have, the better chance you will survive, and the less diversity you have, the less chance of survival.

Someone please please help me with this !! I would really appreciate it

Answers

Answer:

A

Explanation:

Because you would have to have a high mobility to get food and take of without being hit.

How does evolution work to create the diversity of life on Earth?

Answers

Evolution and diversity result from the interactions between organisms and their environments and the consequences of these interactions over long periods of time. Organisms continually adapt to their environments, and the diversity of environments that exists promotes a diversity of organisms adapted to them.

Base your answer to the question on the chemical reaction below.

If the chemical reaction takes place in an organism that requires sunlight to produce substance X, the organism must be

1. a heterotroph
2. an annelid
3. an autotroph
4. a fungus​

Answers

Answer: 3 an autotroph

Why? Autotrophs are an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.

Hope this helps :D
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