1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
IRINA_888 [86]
3 years ago
5

How many miles does someone run in an 8km race?

Biology
1 answer:
nignag [31]3 years ago
3 0

Answer:

4.97097mi

Explanation:

1 km is equivalent to 0.621371mi

8 multiplied by 0.621371= 4.97097

You might be interested in
A) Compare and contrast diffusion, passive transport (diffusion & facilitated), primary active transport and secondary activ
zheka24 [161]

Answer:

<u>Passive transport</u>: It does not need any energy to occur. Happens in favor of an electrochemical gradient. Simple diffusion and facilitated diffusion are kinds of passive transport.

<u>Simple diffusion</u>: molecules freely moves through the membrane.

<u>Facilitated diffusion</u>: molecules are carried through the membrane by channel proteins or carrier proteins.

<u>Active transport</u> needs energy, which can be taken from the ATP molecule (<u>Primary active transport</u>) or from a membrane electrical potential (<u>Secondary active transport</u>).

Explanation:

  • <u>Diffusion</u>: This is a pathway for some <em>small polar hydrophilic molecules</em> that can<em> freely move through the membrane</em>. Membrane´s permeability <em>depends</em> on the <em>size of the molecule</em>, the bigger the molecule is, the less capacity to cross the membrane it has. Diffusion is a very slow process and to be efficient requires short distances and <em>pronounced concentration gradients</em>. An example of diffusion is <em>osmosis</em> where water is the transported molecule.
  • <u>Facilitated diffusion</u>: Refers to the transport of <em>hydrophilic molecules</em> that <em>are not able to freely cross the membrane</em>. <em>Channel protein</em> and many <em>carrier proteins</em> are in charge of this <em>passive transport</em>. If uncharged molecules need to be carried this process depends on <em>concentration gradients</em> and molecules are transported from a higher concentration side to a lower concentration side. If ions need to be transported this process depends on an <em>electrochemical gradient</em>. The <em>glucose</em> is an example of a hydrophilic protein that gets into the cell by facilitated diffusion.

<em>Simple diffusion</em> and <em>facilitated diffusion</em> are <u>passive transport</u> processes because the cell <u><em>does not need any energy</em></u> to make it happen.

  • <u>Active transport</u> occurs <em>against the electrochemical gradient</em>, so <u><em>it does need energy to happen</em></u>. Molecules go from a high concentration side to a lower concentration side. This process is always in charge of <em>carrier proteins</em>. In <u>primary active transport</u> the <em>energy</em> needed <em>comes from</em> the <em>ATP</em> molecule. An example of primary active transport is the <em>Na-K bomb</em>. In <u>secondary active transport</u>, the<em> energy comes from</em> the <em>membrane electric potential</em>.  Examples of secondary active transport are the carriage of <em>Na, K, Mg metallic ions</em>.
7 0
3 years ago
The world's food supply is evenly distributed. true or false
IgorC [24]

False

should be the answer


7 0
3 years ago
Read 2 more answers
How do radio waves help indirectly measure the distance of a star from earth?
madam [21]

As Earth orbits the Sun, this same principle is used by astronomers to determine the distance to nearby stars. ... Parallax is the first "inch" on the yardstick with which astronomers measure distances even further to objects.

3 0
3 years ago
What counteract pressure that pushes and pulls at the side of a building during an earthquake
Evgesh-ka [11]
D. Cross braces this is the right answer
7 0
3 years ago
List three reasons why environmental conservation is important​
navik [9.2K]
Protections the ozone layer
Maintaining animal and human food chain
Preserving potable water and making efficient use of non renewable resources
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which sentences describe the differences between photosynthesis and cellular respiration?
    7·2 answers
  • What expression does talcott parsons use to describe the family?
    8·1 answer
  • Why do farmers use fertiizers and what is a limiting nutrient?
    13·1 answer
  • What happens as pigments are mixed together?
    7·1 answer
  • What is a principle of the fluid mosaic model of cell membrane structure?
    14·1 answer
  • Which of the following do scientists think is responsible for climate change?
    15·2 answers
  • Colorblindness is caused by a recessive x-linked gene. a woman that is heterozygous for this trait marries a man with normal col
    6·1 answer
  • A veterinary team is called to a ranch after the rancher found a cow that had been lost for the past week. The cow is down and h
    11·2 answers
  • Question 5 answer right answer
    7·1 answer
  • A group of students investigated the effect of soaking small onion bulbs in different concentrations
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!