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melomori [17]
4 years ago
12

Anna heated 15 g of Substance A to obtain 5 g of substance B, 4 g of Substance C, and a certain amount of Substance D, which sta

tement is correct
A) the mass of substance D was 10g less than the mass of substance A
B) the mass of substance D was 1 g greater than the mass of substance B
C) the mass of substance A was equal to the total mass of substance C and substance D
D) the mass of substance A was equal the the total mass of substance B and substance D
Biology
1 answer:
weqwewe [10]4 years ago
6 0

Answer:

I think its B

Explanation:

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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
3 years ago
Friend me please. i only have one friend on here.
Mekhanik [1.2K]
Sure! I’ll friend ya Rn
4 0
3 years ago
Which substance on the plasma membrane helps identify chemical signals from outside the cell?
cluponka [151]

Answer:

<em><u>The correct option is A) carbohydrate chain</u></em>

Explanation:

The carbohydrate chain present in the cell membrane helps determine the characteristics of the cell and it also helps to identify the chemical signals from outside the cell. Hence, option A is correct.

Other options, like option B, is not correct because the function of the cholesterol in the cell membrane is to prevent the fatty acids from sticking together. Option D is not correct because transport proteins help some molecules to move inside the cell.

6 0
3 years ago
Why are populations, rather than individuals, the units of evolution?
dimulka [17.4K]

Explanation:

The unit of evolution is the population. A population consists of organisms of the same species that live in the same area. In terms of evolution, the population is assumed to be a relatively closed group. This means that most mating takes place within the population.

3 0
3 years ago
Periods of growth for the economy followed by downturns describes _____. real GDP final goods and services economic cycle
Fittoniya [83]

The correct answer is Economic cycle.

The natural fluctuation in economy between the period expansion (economy growth) and contraction (recession) is known as the economic cycle.  

The normal growth and downturn in the economy is the basic definition of Economic cycle.

During the time of expansion the investors seek to purchase companies and shares and during the time of contraction the investors look to invest and purchase the companies such as utilities and healthcare.

7 0
3 years ago
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