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mojhsa [17]
3 years ago
8

Henri becquerel is credited with the discovery of:

Biology
1 answer:
hodyreva [135]3 years ago
3 0
The Discovery<span> of Radioactivity. In 1896 </span>Henri Becquerel<span> was using naturally fluorescent minerals to study the properties of x-rays, which had been</span>discovered<span> in 1895 by Wilhelm Roentgen</span>
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Which of these neurotransmitters is not released at sympathetic neuroeffector junctions?
Lorico [155]

Epinephrine

Epinephrine is usually produced by the two kinds the adrenal glands and certain neurons.  It plays an important role in the fight-or-flight response by increasing blood flow and also to muscles, output of the heart, pupil dilation, and blood sugar.  

7 0
3 years ago
Please help me in my homework (keep it simple,i couldnt find Science ;-; I am sorry) What is environment? What are three main as
meriva

Answer: It is then the space in which the life of living beings and the interaction between them and other things takes place. It is made up of living organisms, abiotic elements and artificial elements. It includes physical, chemical and biological components of the organisms and elements that form it. It is important because it is the place of habitat of humanity, it provides natural elements such as water and food, it provides fuels and raw materials that serve to manufacture artificial things and it contributes to the sustainability of life on the planet.

Explanation:

The environment is a system made up of living organisms (such as animal and plants), abiotic elements (lifeless, such as stones or water) and artificial elements (created by man, such as buildings) that are related to each other and can be modified by human action. <u>It is then the space in which the life of living beings and the interaction between them takes place</u>.

It includes physical, chemical and biological components of the organisms and elements that form it. That is, how is its composition and its function in the environment.

The importance of the environment lies in:

  • It is the place of habitat of humanity, so it influences the life of human beings and future generations. It is the space where life develops at this time with all living beings and their natural components.
  • It provides natural elements such as water and food since it offers all its natural resources needed by the human being.
  • It provides fuels and raw materials that serve to manufacture the artificial things we use daily, to build houses, have light, transport, among many other benefits to exist.
  • In the environment we find a great biological diversity of plants and animals that help maintain the ecological balance of the earth. This contributes directly to the sustainability of life on the planet. Each organism has a unique role to play.

Therefore, all societies must guarantee their care for their existence and make rational use of all their resources.

7 0
2 years ago
Match each atom to the corresponding number of electrons it will steal or give away.
Stella [2.4K]

Answer:

1. Fluorine (7 electrons) => c. steals 1 electron

2. Calcium (2 electrons) => a. gives away 2 electrons

3. Oxygen (6 electrons) => d. steals 2 electrons

4. Lithium (1 electron) => e. gives away 1 electron

5. Xenon (8 electrons) => b. neither gives away nor steals any electron

Explanation:

Given the following valence electrons of the atoms listed above, each atom can be matched to its corresponding number of electrons it can steal or give away as they form bonds and attain a stable state:

1. Fluorine (7 electrons) => this will steal 1 electron from another atom to attain a stable state when it comes to make the number of electrons 8.

2. Calcium with 2 valence electrons, will give away this 2 electrons in its outer shell to be stable and form bond with another atom that will accept these 2 electrons.

3. Oxygen with 2 valence electrons, will steal 2 electrons to make the electrons in its outer shell 8, as it bonds with another atom to become stable.

4. Lithium will give away 1 electron to become stable when it combines.

5. Xenon with 8 electrons in its outer shell is in a stable state and kind of inert. It doesn't need to receive or steal any electron from or to any other atom in this state.

7 0
3 years ago
Photosynthetic and chemosynthetic organisms can be called primary producers because they make their own food?
LenaWriter [7]

Heterotrophs are organisms that must consume food from other organisms because they are unable to synthesize their own food molecules.

<h3>What is heterotrophs?</h3>
  • An organism is referred to be a heterotroph if it is unable to manufacture food on its own and must obtain it from other sources of organic carbon, primarily plant or animal materials.
  • Heterotrophs are primary, secondary, and tertiary consumers in the food chain but not producers.
  • Because they eat producers or other consumers, heterotrophs are referred to as consumers.
  • Humans, dogs, and birds are all instances of heterotrophs.
  • In a food chain, a group of creatures that supply energy and nutrients to other organisms, heterotrophs occupy the second and third levels.
  • An organism is referred to as a heterotroph if it consumes other plants or animals for food and energy.
  • Its origins are in the Greek words hetero, which means "other," and trophe, which means "nutrition."
  • Autotrophs and heterotrophs are two main classifications of organisms depending on how they receive energy and nutrients.

Learn more about heterotrophs here:

brainly.com/question/21450466

#SPJ4

3 0
1 year ago
Which type of immune system cell engulfs pathogens and other foreign particles?
FromTheMoon [43]

A macrophage is a large phagocytic cell that engulfs foreign particles and pathogens. So Macrophage.

Hope this help! :)

6 0
2 years ago
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