BIOLOGY HIGH SCHOOL

In a river, large boulders are transported by _____.A. Solution
B. Traction
C. Suspension
D. Abrasion
Which answer choice is the correct one? Thank you.

Answers

Answer 1
Answer: The correct answer is B. Traction.

Traction is the force that generates movement of objects that have a desire to remain immovable.
Answer 2
Answer:

Answer: B. Traction

Traction is a geological process in which a mechanical force transports larger and heavier rocks by sliding and rolling along the substratum. Traction occurs by water erosion. It results in the movement or transportation of large rocks stones or boulders, which are otherwise settled at the bottom, by the force exerted by the water current. These rocks, stones or boulders gets displaced from their sites and attains a rolling movement due to fast flowing water current.  

Related Questions

The longest and largest bone of the upper limb is the ________
6. In an ecosystem, sometimes more than one animal is a predator to the same animal. For example, the great barn owl and the the bald eagle both share a habitat, and they both hunt mice. Which answer explains how this relationship can work? a. They are both hunted by the red fox. b. The eagle migrates to other ecosystems. c. The owl hunts at night, and the eagle hunts during the day. d. There is an overpopulation of owls.​
Maria wanted to learn more about the birds that visit her backyard. She installed several bird feeders and offered a variety of bird seed mixes in order to attract a mix of species. For a month, she observed the bird feeders three times a day for an hour each day and counted the types of birds that she saw. Then, she made a pie chart to represent her findings. What is the most likely reason that she chose a pie chart?
Environmental degradation is a consequence of previous technological advances. Please select the best answer from the choices provideda. True b. False
Which of these is a segment of DNA that contains the information necessary to produce a protein?

A hydrocarbon has molecular formula C3H8. Identify the class of hydrocarbons it belongs to.

Answers

Answer:

Alkanes

Explanation:

There are 3 classes of hydrocarbons based on the on the presence of single, double and triple bond present in them. These classes are mentioned as under:

1) alkanes

2)alkenes

3)alkynes

Alkanes are the hydrocarbons which are compounds of carbon and hydrogen bonded by single bond. Their general formula is CnH2n+2 that means if in an alkane n = 3 then it will have 3 carbon and 2n+2 = 8 hydrogen molecules.

Alkenes are the hydrocarbons which are compounds of carbon and hydrogen bonded by double bond. Their general formula is CnH2n.

Alkynes are the hydrocarbons which are compounds of carbon and hydrogen bonded by triple bond. Their general formula is CnH2n-2.

As explained above, the given hydrocarbon is an alkane because its chemical formula is C3H8 which satisfies the condition for formula CnH2n+2 which is valid for alkanes.
It would belong to the group known as the Alkane which have the general form C_(n) H_(2n + 2)

Organisms are constantly interacting with their environment. Sometimes this interaction has a positive effect on the environment, other times a negative impact. Beetles in the forest infest and eat limbs of trees that have fallen to the forest floor. The best way to describe the beetles impact is to say that A) they are having a neutral impact on the environment by acting as decomposers.

B) they are having a positive impact on the environment by acting as decomposers.

C) they are having a negative impact on the environment by acting as decomposers.

D) they are having a predatory impact on the environment by acting as decomposers.

Answers

The correct answer is option B) i.e. they are having a positive impact on the environment by acting as decomposers.

By acting as decomposers beetles are helping in recycling of nutrients between biotic (organisms) and abiotic factors (enviroment). So, it may be considered as positive impact on the environment. Decomposers play a very important role in food chains and food webs. They breakdown biomolecules and liberate the micronutrients and micronutrients as inorganic molecules back to the environment. These inorganic molecules are used by plants once again  to synthesize biomolecules. This is how nutrient cycle operates with the help of decomposers. For example, protein molecules of dead and decaying matter are broken down by decomposers to liberate nitrogen gas to the environment which is utilized by leguminous plants to make protein molecules again.
B is the correct answer

What is the growth rate? births = 20 deaths = 10 immigration = 5 emigration = 1 25 20 16 14

Answers

Okay let me settle this now... I, just as most of you, hate the giant long explanations, most people are here for the answer, so I'll do us all a favor here... It's 14.
We will write words shortly for the growth rate GR birth B,for death D,for immigration I and for emigration E.
So N=20
D=10
GR1=?
GR1=N-D
GR1=20-10
GR1=10
AND THEN FORM IMIGRATION AND EMIGRATION.
E=125 20 16 14
I=5
GR=?
GR2=E-I
GR2=125 20 16 14-5
GR2=125 20 16 9
AND THEN
GR2-GR1=GR
GR=125 20 16 9-10
GR=125 20 15
I THINK THIS IS THE ANSWER!!!

ONE QUICK PHYSICAL SCIENCE QUESTION 1. Why isn’t it possible for an atom to have a mass number of 15 and an atomic number of 18?

Answers

Anatom with an atomic number of 12 has 12 protons. Because the massnumber is the sum of the protons and neutrons, the mass number wouldneed to be at least 12. I hope this helped!

Before United States citizens travel to Africa, a(n) _____ for yellow fever is required.immunity
immunization
viral detection
antibiotic

Answers

Answer:

The correct answer would be immunisation.

Immunisation refers to the process of developing immunity against a particular pathogen or disease.

In this process, a vaccine consists of attenuated or heat killed pathogen is administered into a person.  

The body produces a primary immune response against the weakened pathogen or antigen. It also develops memory of the pathogen due to which body is able to recognise the pathogen easily if it encounters the same in near future.

It helps the immune system to produce quicker and amplified immune response against the pathogen and our body becomes immune to that particular disease or pathogen.

Thus, immunisation is required before travelling to Africa as yellow fever is very common there.
Before traveling to Africa you must get an immunization, or shot. By the way, I think this question belongs in english.

As hominids evolved, their litter sizes decreased and their gestation period increased. Which of the following inferences can be made based on this observation?Reproductive success would increase, since mothers had to carry fewer offspring.
Hominids would have less difficulty finding mates, since competition is reduced.
Maternal care for offspring would increase due to a greater investment to protect.
Offspring would likely migrate in order to expand their territory and find mates.

Answers

The correct answer is - Maternal care for offspring would increase due to a greater investment to protect.

During the hominid evolution, the litter sizes decreased and the gestation period increased, and that has resulted into a slower reproductive cycle. The smaller number of the litter means that the newborns are much more precious in the sense of the survival of the species, as any loss can have a very big negative effect on the future generations.

Because of that, the maternal protection, but also the protection of the father and everyone in the tribe is very big, and the young ones are well taken care of for much longer periods of time than before. That has made the hominid youngsters very dependent on the elderly for over a decade for their survival, thus prolonging their independence and ability to survive on their own.

Answer:

C

Explanation:
Other Questions
Does deforestation impact in climate change
Which statement correctly distinguishes photosynthesis and respiration?Photosynthesis occurs in animal cells and not plant cells.Cell respiration occurs in animal cells and not plant cells.Photosynthesis uses chemical energy as energy source, and cell respiration uses light energy.Photosynthesis uses light as energy source, and cell respiration uses chemical energy.
The tiny holes in the cell walls of plants that allow for the passing of materials are called the _____. middle lamellaplasmodesmatastomatastroma
Why are common names not a good reference to a species