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kondor19780726 [428]
3 years ago
8

Like all valid scientific theories, modern cell theory

Biology
2 answers:
gavmur [86]3 years ago
6 0

The right answer is A.builds on the work of earlier scientists.

The cellular theory appeared in the 19th century, it consists of three principles:

1) All living organisms are made of at least one cell.

2) The cell is the basic organizational unit of life.

3) All cells come from other living cells

The cell is the structural and functional unit of an organism.

Readme [11.4K]3 years ago
5 0

so your answer is:

builds on the work of earlier scientists

:)

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Proteins are made where in the cell
LUCKY_DIMON [66]
Proteins are made in the "Nucleolus" of the cell by the "Ribosomes"

Hope this helps!
5 0
3 years ago
What are the body’s three defenses? How do they differ from each other.
Artemon [7]

Answer:

- Physical and chemical barriers

- non-specific innate responses

- specific adaptive responses

<u>The differences are...</u>

The first barrier is the physical and chemical barrier. It is the first line of defense when in contact with outside sources, this can be through the skin, earwax, nose-hair, etc.

The second barrier, the non-specific innate response, is after these outside sources have somehow managed to pass through the first barrier. They come into contact with cells and enzymes that help to defeat them.

The third barrier, the specific adaptive response, is the body's way of dealing with pathogens that the body has encountered before. (B cells activate)

8 0
3 years ago
Increases and decreases of the heart rate result from changes in the activity of the _______. A. medulla oblongata B. thalamus C
pantera1 [17]

Option A. Increases and decreases of the heart rate result from changes in the activity of the <u>medulla oblongata</u>

<u></u>

<u></u>

<u></u>

What is medulla oblongata ?

  • Medulla oblongata, also called medulla, the lowest part of the brain and the lowest portion of the brainstem.
  • The medulla oblongata is connected by the pons to the midbrain and is continuous posteriorly with the spinal cord, with which it merges at the opening (foramen magnum) at the base of the skull.
  • The medulla oblongata plays a critical role in transmitting signals between the spinal cord and the higher parts of the brain and in controlling autonomic activities, such as heartbeat and respiration
  • The medulla is divided into two main parts: the ventral medulla (the frontal portion) and the dorsal medulla (the rear portion; also known as the tegmentum).
  • The ventral medulla contains a pair of triangular structures called pyramids, within which lie the pyramidal tracts.
  • The pyramidal tracts are made up of the corticospinal tract (running from the cerebral cortex to the spinal cord) and the corticobulbar tract (running from the motor cortex of the frontal lobe to the cranial nerves in the brainstem)

To know more about medulla oblongata, refer:

https://brainly.in/question/123107

#SPJ4

7 0
2 years ago
Arrange the steps of energy production in the correct order.
harina [27]
Consumption of food
Breakdown of starch into glucose
Absorption of glucose molecules
Cellular respiration
ATP
3 0
3 years ago
Read 2 more answers
Plz help Me i will really appreciate it
Artist 52 [7]

Answer:

An energy pyramid is a model that shows the flow of energy from one trophic level to the next along a food chain. The pyramid base contains producers—organisms that make their own food from inorganic substances. All other organisms in the pyramid are consumers

Explanation:

8 0
3 years ago
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