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AURORKA [14]
2 years ago
8

1.What do you call the number in front of a chemical formula that tells how many atoms or molecules of a substance take part in

the reaction?
A) yield

B) coefficient

C) symbol

D) subscript

2.A balanced equation has ?

A) the same number of reactants as products

B) the same total number of coefficients on both sides of the equation

C) the same number of each kind of atom on both sides of the equation

D) an equal number of molecules on both sides of the equation

3.In a chemical reaction, the total mass of the products _____.

A) must always be the same as the total mass of the reactants

B) is always less than the total mass of the reactants in an open system

C) can be greater or less than the total mass of the reactants

D) must be less than the total mass of the reactants

4.Due to the principle of conservation of mass, _____.

A) all chemical formulas have coefficients

B) all chemical reactions must have an equal number of reactants and products.

C) all chemical reactions must take place in open systems

D) all chemical equations must be balanced

help me please
Biology
1 answer:
blsea [12.9K]2 years ago
3 0

Answer:

d

Explanation:

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Answer:

a Anaphase I

b Metaphase I

c Telophase I

d Anaphase II

e Prophase I

f Telophase II

Explanation:

Prophase I begins after the DNA has been duplicated, as shown in picture e. The chromosomes are condensed, and also visible, which is apparent in picture e.

The next stage is called Metaphase I, in which the pairs of homologous chromosomes align at The the centre of the cell and the spindle fibres attach, as shown in picture b.

The pairs of chromosomes are pulled apart to opposite poles of the cell by the spindle fibres., as shown in picture a. This stage is called Anaphase I.

Then, a process called Telophase I occurs, when the cell divides into two daughter cells. One of these cells is shown in picture c.

Picture d shows the stage Anaphase II, where the spindle has attached and the chromatids are pulled to the opposite poles of the cell.

The final picture left is picture f, which shows the daughter cell at the end of meiosis II, where the nuclear envelope is reforming, as in telophase II.

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3 0
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marusya05 [52]

Answer:

Parasitism

Explanation:

Parasitism is the form of mutual relationship between two organisms which occurs in such a way that one organism always get benefit and the other always gets harm. The one getting harm may or may not be killed due to it.

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Similarly, Malaria is caused in human by a parasite called plasmodium. It enters into the blood and causes a disease called Malaria which can even lead to the death of affected individual,the parasite itself stays healthy and gets benefit.

Hope it help!

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Explanation:

there are some agriculture inventions  

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