1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kifflom [539]
3 years ago
6

According to cell theory _____. all cells have a nucleus all cells are differentiated all cells reproduce by mitosis all living

organisms are composed of cells
Biology
2 answers:
kodGreya [7K]3 years ago
8 0

Answer:

All living organisms are composed of cells

Explanation:

Before the invention of advanced and complex microscopes used today, scientists like Anton Van Leeuwenhook observed some living organisms e.g Protista using his invented lens (now ancient) but later in 1665, Robert Hooke, was able to coin the term "cell" for the box-like structures he observed when viewing corked tissues through a lens.

However, in the 1800s, this view began to change thanks to the advancement in lens and the construction of microscope, which enabled scientists to see components of the cell. Microscopes allowed early scientists to view and postulate about the cells they could see. In 1839 specifically, Scientists like Mathias Schleiden and Theodor Schwann formulated a general theory of how cells work that is very simple, which was later spiced up by Rudolf Virchow.

The universally accepted historic scientific theory called Unified Cell theory states that:

1. All cells are made up of one (unicellular) or more (multicellular) cells.

2. The cell is the basic and fundamental unit of life and;

3. New cells arise from previously existing cells

Free_Kalibri [48]3 years ago
4 0
I believe it is "All living organisms are composed of cells."
You might be interested in
A muscle cramp is a sudden, painful contraction of a muscle, during which movement is difficult. What is happening at the cellul
svetoff [14.1K]

Answer:

Muscle cramps are caused by the inability of myosin fibers to break free from the actin filaments during contraction, resulting in a prolonged contraction. A lack of ATP would obviously produce cramping, as myosin requires ATP to become free from actin.

6 0
3 years ago
Read 2 more answers
What type of stellar object will the sun end its life end
Lerok [7]
Your wording is a bit confusing, but I get what you're trying to say.

Here's what the life cycle of a star looks like.

Stars begin as giant balls of hydrogen colliding together and releasing a ton of energy. This hydrogen will eventually fuse together to form helium, and once all of the hydrogen has become helium, This helium will, after a very long time and under lots and lots of pressure, form carbon. When this happens, it is considered a red giant, and the star becomes bigger and less bright. The star will become less and less bright and eventually start to shrink as all of that carbon turns to heavier elements like iron, turning into a dwarf star that eventually dies out.
(Dwarf stars are still shining are called white dwarf stars, and dead ones are black)

The cool part, though, is that massive stars (those which have a mass of at least 3 times the Sun's) turn into heavy elements so fast that the core collapses almost instantaneously and explodes violently into a ball of fire known as a supernova.

Sometimes the core of the star gets left behind, and either forms a neutron star or, if it has the mass of a massive star, will collapse in on itself and become a black hole.

7 0
3 years ago
The stems of a plant:
Snezhnost [94]
Should be A I think
4 0
2 years ago
Question 1 (Multiple Choice Worth 2 points)
Gelneren [198K]

Answer:

1

Explanation:

because of more fish they allow more oxygen and due to of that increased algae blooms can come.

5 0
2 years ago
Which system creates blood cells?
Stella [2.4K]

skeletal system create blood cells

6 0
3 years ago
Read 2 more answers
Other questions:
  • Choose one of these hormones: Glucagon, Insulin, or Thyroid hormone.
    11·1 answer
  • From which part of the embryvo are embryonic stem cell lines derived?
    14·1 answer
  • Explain the relationship between crossing over and genetic variation
    12·2 answers
  • When tissues unite to perform complicated activities what are they called
    9·1 answer
  • The Monarch butterfly feeds on milk-weed to obtain nectar. While visiting the flower, the butterfly may incidentally pick up pol
    5·1 answer
  • What animals were impacted by the disappearance of the grey wolf?
    5·2 answers
  • In science why is it important to have more than one piece of evidence to support your claim?
    10·1 answer
  • Some organisms can reproduce both sexually and asexually. Which of the following is a long-term consequence of undergoing only a
    7·2 answers
  • Texto donde se desarrolle la definicion de seleccion natural. Además, empleem los siguientes terminos: Variabilidad, mecanismo s
    5·1 answer
  • Model of a cell cycle
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!