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3 years ago

Rock Cycle here’s my cell theory notes

Biology

1 answer:

White raven [17]3 years ago

3 0

Answer: In biology, cell theory is a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. Cells are the basic unit of structure in all organisms and also the basic unit of reproduction.

The three tenets to the cell theory are as described below:

All living organisms are composed of one or more cells.

The cell is the basic unit of structure and organization in organisms.

Cells arise from pre-existing cells.

The theory was once universally accepted, but now some biologists consider non-cellular entities such as viruses living organisms, and thus disagree with the first tenet. As of 2021: "expert opinion remains divided roughly a third each between yes, no and don’t know".As there is no universally accepted definition of life, discussion will continue.

Explanation:

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Describe the view if you were to stand in the penumbra of a solar eclipse.

nignag [31]

During a solar eclipse, when the Moon's shadow falls on the Earth, we stand in the shadow rather than looking at it. Observers standing in the umbra see a total eclipse of the Sun, while observers under the penumbra see a partial eclipse.

4 0

3 years ago

Which statement about bacteria is TRUE?a. All bacteria are multicellular organisms. b. Bacteria do not use the same genetic code

motikmotik

Answer:

Which statement about bacteria is TRUE?a. All bacteria are multicellular organisms. b. Bacteria do not use the same genetic code as organisms in other domains. c. Bacteria are in a domain of their own. d. Archaea belong to the same domain

The answer to the question is Option C (Bacteria are in a domain of their own)

Explanation:

There are eight distinct taxonomic categories:

Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species

A domain, is a taxon in the highest rank of organisms, higher than a kingdom in the classification of life.

The three domains are the Archaea, the Bacteria, and the Eukarya.

Organisms are placed into domains and kingdoms based upon their:

Cell type

Their ability to make food
The number of cells in their bodies

Members of the domain bacteria are called Prokaryotes.

Bacteria are not multicellular organisms. They are large group of unicellular microorganisms.

Bacteria are single-celled microorganisms that does not have a nucleus or any other membrane and they can exist either as free-living organisms or as parasites.

The most common four Bacteria are: Micrococcus, Staphylococcus, Bacillus, and Pseudomonas. Bacteria and eukaryotes have membranes composed mainly of glycerol-ester lipids.

Archaea have membranes composed of glycerol-ether lipids. Archaea are any group of single-celled microorganisms with no cell nucleus or any other organelles inside their cells. They have distinct molecular characteristics separating them from bacteria.

Archaea are prokaryotes that share certain characteristics with bacteria.

Bacteria aren’t placed in a kingdom by themselves, they have their own domain.

Bacteria are placed in their own domain, because of morphology and especially ancestry, like any other organism.

5 0

3 years ago

What are the levels of organization within the human body from the most simple to the most complex?

Aleks04 [339]

Answer:

D. cell, tissue, organ, organ system, organism

Explanation:

also before cells there are also (and in order) atoms, molecules, organelles

(have a great day!)

;)

5 0

3 years ago

If a corn plant has a genotype SsTt, what are the possible genetic combinations that could be present in a single grain of polle

wolverine [178]

The maize plant possesses the SsTt genotype.

The F1 generation will produce the children depicted in the punnet square after they are crossed.

<h3>What is pollen grain?</h3>

A seed plant's pollen is a collection of microspores that typically takes the form of a fine dust. Each pollen grain is a tiny body with a unique shape and structure that develops in seed-bearing plants' male structures before being carried by a variety of agents (such as wind, water, insects, etc.) to the female structures, where fertilization takes place.

The genotype in question is a mono-hybrid heterozygous characteristic.

The pollen grains having a genetic combination like ST, St, sT, and st as depicted in the image will result from a cross between the two genotypes.

For more information regarding pollen grain, visit:

brainly.com/question/20638294

#SPJ1

6 0

2 years ago

Which two scientists worked together to develop a three-dimensional model of DNA?

Oxana [17]

The last one.) watson and crick

8 0

3 years ago

Read 2 more answers