BIOLOGY MIDDLE SCHOOL

How did scientists discover the common structure of cells?

Answers

Answer 1
Answer: They used the mcroscope to observe the structures of the cell. Some scientists draw while they are observing in the microscope
Answer 2
Answer: scientists first discovered cells through the microscope

Related Questions

What is an important trait or skill for a scientist to have?
WHICH STATEMENTS DIFFERENTIATE DNA AND RNA
As water passes into the guard cells, the pore opens. explain why.
What does DNA stand for
Which process must occur first before any cell division can take place

PLZ HELP FAST. I DON"T WANT TO DO SUMMER SCHOOL!!!!!!!!!!!!Which represents a deletion of a section of the DNA shown here?



A—C—T—G—G—A—T







A.

A—C—T—A—T






B.

A—C—T—C—C—T—T






C.

A—C—T—C—G—A—T






D.

A—T—C—T—G—G—A—T

Answers

the answer is c now can you help me with mine because its due tommrow
I believe that the answer is (c) A—C—T—C—G—A—T 
I hope this helped ☻

Summarize the process of fertilization and implantation.

Answers

The process of fertilization involves the deposition of sperms into the vagina to the egg cell during sexual intercourse. Sperms make their way towards the cervix and uterus, and eventually goes to the fallopian tubes. Only a few hundred will remain as they interact with the egg through the use of their heads and movement patterns.

The process of implantation happens when the embryo, the fertimized eggs develops inside the fallopian tube after three days, and then travels to the uterus.

Why are certain traits adaptations in one environment,but not in another?

Answers

Answer:

The correct answer will be option-B

Explanation:

Adaptation is a process by which the species changes itself to become best fitted to their environment. The adaptation is the result of the genetic changes that are passed on from the parents to the offspring and become established in a population. The natural adaptation is the driving force of the evolution of organisms on earth.

Since adaptation ensures the survival of the species to their respective environment which increases their reproductive rate, therefore, Option-B is the correct answer.
You already answered the question in the picture above

Choose all the answers that apply.Which of the following increases erosion?
clearing forests
leaving fields unplanted
careless farming
contour plowing
crop rotation
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Lost soil nutrients can be replaced through _____.
contour plowing
recycling
crop rotation
erosion

Answers

the first one is contour plowing

Answer:

First one is

-careless farming

-leaving fields unplanted

-clearing forests

And the second is

-crop rotation

Explanation:

Why is it relatively rare to observe a solar eclipse

Answers


Because the area on Earth that's inside the tip of the moon's shadow is
usually only a couple of hundred miles wide at most, and it's moving along
the Earth's surface at thousands of miles an hour, and only the people who
happen to be inside that little area see the total solar eclipse.

Over a substantial period of time, the numbers of solar and lunar eclipses
are equal.  For example, during the 100 years of the 20th Century, there
were 128 solar eclipses, and 129 lunar ones.

The difference is that during a lunar eclipse, everybody on the night side of
Earth can see it, but during a solar one, you have to be in just the right place
on the day side.

Another way to look at it:
A lunar eclipse happens on the Moon, and anybody who can see the Moon
can see the eclipse.  But a solar eclipse happens on the Earth, and in order
to see it, you have to be where the eclipse is.
The solar eclipse may only be able to be seen in one area, and that is totally normal. Traveling at such a fast speed not many would be able to. So, the velocity and speed it is going at does have a play in this matter ⇒ :) 

Gradualism is a pattern of evolution in whichA. a single species evolves into several closely related species.
B. several distantly related species develop similarities.
C. a species evolves at a slow, steady pace.
D. a species has periods of little evolution interrupted by periods of rapid evolution.
 
Mass extinction would most likely result from which of the following events?
A. A disease kills off a single species of predator within an ecosystem.
B. A wildfire burns a national park.
C. Global temperatures drop several degrees after several massive volcanic eruptions.
D. A massive earthquake strikes North America.

Answers

1.   C. a species evolves at a slow, steady pace. 

Gradualism, is the process by which a certain specie or creature undergo changes and variations in a limited and solely focusedly confined in long period of time.

2.       A. A disease kills off a single species of predator within an ecosystem.

Mass extinction is a massive and global elimination in a certain specie or species. It doesn’t involve itself only in a secured and measurable area but it impacts the whole large-scale of population as a whole.    



Other Questions
Which of the following is not part of the nitrogen cycle? a conversion of atmospheric nitrogen into usable organic compounds by bacteria b breathing in nitrogen gas from the atmosphere c nitrogen fixation d conversion of nitrogen from decaying organisms into ammonia
Which factor is most likely to cause a faster rate of blood flow
What causes scientific knowledge to change over time
Which type of water is more dense: cold, salty water or warm, less salty water? Explain your answer