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Oduvanchick [21]
3 years ago
15

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

Biology
1 answer:
lara31 [8.8K]3 years ago
8 0
The invention of the microscope is the answer. 

I hope this helps. 

Have a nice day. 
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Drag each tile to the correct box.
schepotkina [342]

The order of mass movement event that gives people the least amount of time to react is:

  • Avalanche
  • Earthflow
  • Creep

<h3>What is Mass movement?</h3>

This is defined as the movement of rocks or soil down slopes under the force of gravity.

The one with the fastest movement is avalanche and the slowest is creep thereby making the above order is the most appropriate.

Read more about Mass movement here brainly.com/question/6068732

#SPJ1

3 0
1 year ago
Most of the regulated medical waste in the United States is incinerated. These incinerators are a health hazard because they rel
yaroslaw [1]

Answer:

volcanic waste dump and plastic eating bactirium to clean alot of things

also a purge to remove the overpopulation problem thus reducing the production and polution up to 10 to 50 % all over the world

Explanation:

7 0
3 years ago
Why is sample size important?
Delvig [45]
What is sample size and why is it important? Sample size refers to the number of participants or observations included in a study. ... The size of a sample influences two statistical properties: 1) the precision of our estimates and 2) the power of the study to draw conclusions.
8 0
3 years ago
En un cruce entre peces naranjas y peces grises se obtiene una generación (f1) de 50% peces grises . Realice el cruce y explique
Ilya [14]

Answer:

Uno de los progenitores es heterocigoto para color naranja (Nn) y el otro parental es homocigoto recesivo para gris (nn). Al haber una cruza entre un homocigoto recesivo y un heterocigoto, la 50% de la progenie expresa color naranja (Nn), mientras que el otro 50% expresa color gris (nn).

Explanation:

<u>Datos disponibles:</u>

  • Cruce entre peces naranjas y peces grises
  • 50% de la F1 son peces grises
  • Naranja dominante sobre gris

Podemos nombrar el alelo dominante para color naranja <em>N</em>, y al alelo recesivo  para color gris <em>n</em>.

Para que en un cruce entre dos fenotipos distintos, el 50% de la primer camada exprese uno de estos fenotipos, entonces uno de los parentales debe ser heterocigoto, mientras que el otro parental debe ser homocigoto recesivo. De esta forma 50% de la primera generación expresara uno de los fenotipos, mientras que el otro 50% expresará el otro fenotipo.

Supongamos que uno de los parentales lleva el genotipo <em>Nn</em>, y el otro parental es <em>nn</em>.

Cruce:

Parental)      Nn    x     nn

Gametas)   N    n       n    n

Fenotipos) Naranja     Gris

Cuadro de Punnett)      N           n

                            n       Nn         nn

                            n       Nn         nn

F1)  2/4 = 1/2 = 50% de la progenie tendrá genotipo heterocigoto, Nn

     2/4 = 1/2 = 50% de la progenie tendrá genotipo homocigota recesivo,    

     nn

     50% de la progenie será color naranja (Nn)

     50% de la progenie será color gris (nn)

               

3 0
3 years ago
As cell size increases, the surface area-to-volume ratio increases.<br> a. True<br> b.False
Lerok [7]
The answer is False

Hope this help :)
4 0
3 years ago
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