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brilliants [131]
4 years ago
9

What technological advancement was necessary before scientists could begin to observe cells?

Biology
1 answer:
Sladkaya [172]4 years ago
8 0
They needed neuron and compound microscopes i am learning about that




WE HAVE STEM BRAINS :}
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Please answer this for me.
aleksandrvk [35]

Answer:

absorption of water

because the picture is a plant cell and the vacoule is very large in which it contains the solution of the cell

5 0
4 years ago
Read 2 more answers
5) An air pressure of 30.30 inches of mercury is equal to how many millibars of air pressure?
Assoli18 [71]

Answer:

2

Explanation:

1,026.1

when air pressure is 30.30 inches of mercury is equal to 30.30

the result become 1026.1

4 0
3 years ago
Which action is a reflex action​
aev [14]
Reflex arc which can act on an impulse before that impulse reaches the brain.
8 0
4 years ago
If an organism that is incubated on a kligler iron agar slant produces a red slant and yellow butt, this indicates that the orga
Harlamova29_29 [7]

Klinglers iron agar medium is used to find the enterobacteria which can ferment glucose , lactose and hydrogen Sulphide . They are H₂S producing bacteria .

This media have phenol red as an indicator. When the glucose is fermented to acid , the production of acid turn the indicator from red to yellow, but it is then reoxidised and turns red again . When lactose is fermented it produce large amount of acid , and turn indicator yellow . Hence the slant will become yellow.And combination of ferrous sulphate and sodium thiosulphate helps in detection of H₂S which produce black color at the butt .

Learn more about indicator at : brainly.com/question/20264817

#SPJ4

4 0
1 year ago
The diagram represents some stages in the 19. development of the modern horse, according to evolutionary theory. The diagram is
alexdok [17]

Hello. You forgot to add the diagram.

The diagram is attached below.

Answer:

1. examination of homologous fossilized structures of primitive horses

Explanation:

As you can see in the diagram, to show the stages of the development of the modern horse, a comparison is made between the forelimb structure and the molar tooth of these horses (related to the adult form). These two factors of comparison establish the representation of fossilized homologous structures of primitive horses.

As you may already know, homologous structures are different body structures from different animals that have a strong similarity (because they are inherited from a common ancestor). When these animals die and these structures are conserved, we can say that they have been fossilized.

As the forelimb structure and the molar tooth of the horses shown in the diagram are homologous structures that were fossilized, we can say that option 1 is the correct answer to your question.

3 0
3 years ago
Read 2 more answers
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