All categories

3 years ago

Looking at a cell under a microscope, you note that it is a prokaryote. How do you know? (1 point)

2 answers:

5 0

The correct option is C.
There are basically two types of cells, they are prokaryotic and eukaryotic cells. The eurkaryotic cell is a well developed cell that is usually find in multi cellular organisms while the prokaryotic cell is usually find in unicellular organisms. The prokaryotic cell is typically described as a primitive cell because it lacks nucleus and do not possess most of the remaining cell organelles. The organisms that possess prokaryotic cells are called prokaryotes. Examples of such organisms are bacteria and archaea.
Instead of nucleus, prokayotes possess a nucleiod region which contains the cell's DNA. Prokaryotic cells also possess cell wall, cytoplasm and ribosomes.

enot [183]3 years ago

4 0

A prokaryotic cell is devoid of a nucleus, unlike a eukaryotic cell.

Further Explanation:

A prokaryote is a single-celled organism that does not contain a distinct nucleus. It also lacks other membrane-bound organelles such as endoplasmic reticulum, mitochondria, chloroplast, and Golgi apparatus. For example, E. coli, archea, streptococcus bacteria, and Streptomyces bacteria. The region containing the DNA is called nucleoid. The nucleoid is not membrane bound.

The genetic material (DNA), proteins and other metabolites are present within the cytoplasm of a prokaryotic cell surrounded by a cell membrane and not in separate cellular compartments. Certain bacteria also contain flagellin protein which makes the flagellum required for chemotaxis. The physiological response of a bacteria in the direction of increasing or decreasing the concentration gradient of a particular molecule is chemotaxis.

The prokaryotes or bacteria might acquire four basic shapes: cocci, spiral, bacilli, and vibrio. A coccus shape represents a bacterium which is ovoid or spherical in appearance. A bacterium is called spiral when it contains spiral-shaped twisted rods. Some other bacteria have either cylindrical or comma-shaped and are hence called as bacillus or vibrio, respectively. The bacterial and archaeal species perform asexual reproduction, for example, binary fission.

On the other hand, the eukaryotes are multicellular as well as unicellular. The unicellular eukaryotes are algae, protozoa, and phytoplankton whereas, the multicellular eukaryotes are animals, brown algae, green algae, and fungi. The organelles present in the cytoplasm of the eukaryotic cell are mitochondria, chloroplast, nucleus, and Golgi apparatus. These organelles are bound by a membrane on the outside. The major part of DNA is present in the nucleus which is surrounded by a nuclear membrane whereas; mitochondria and chloroplast also contain some of the genetic material in the case of animals and plants respectively.

Learn more:

1. Learn more about science and society brainly.com/question/1721226

2. Learn more about difference between law and theory brainly.com/question/192651

3. Learn more about primary succession brainly.com/question/1386621

Answer Details:

Grade: High School

Subject: Biology

Chapter: Cell- The Unit of Life

Keywords:

Eukaryotes, prokaryotes, DNA, genetic material, membrane-bound organelles, nucleus, nucleoid, mitochondria, chloroplast, endoplasmic reticulum, multicellular, unicellular, single-celled organism, flagellum, flagellin.

You might be interested in

A family takes its summer vacation at a beach resort. Six-year-old Timmy spends the entire morning in a swimming pool. When his

Kitty [74]

Water diffuses into the skin via sweat ducts which alters the electrolyte balance. electrolytes can be salts like sodium and potassium. This alters the stability of neurons causing blood vessels to constrict therefore decreasing the amount of fluid in the fingers which would normally give the skin tension. The decrease causes wrinkles.

8 0

3 years ago

The traditional view of mangrove forests as wastelands and unhealthy environments helped promote their degradation because _____

Westkost [7]

This view led individuals and businesses to disregard these areas as unimportant and therefore they served as prime locations for dumping and pollution. This dumping and pollution led to the further degradation and destruction of these vital natural habitats.

6 0

3 years ago

HELP RIGHT NOW PLZZZZZZZZZ

mrs_skeptik [129]

2nd one is the right answer

8 0

3 years ago

Read 2 more answers

Read the scenario below and answer the question that follows.

schepotkina [342]

Answer:

The answer is A

Explanation:

Because he scolded her

I hope this helps! :)

Plz mark Brainliest trying to rank up!

Have a nice day!

6 0

3 years ago

Read 2 more answers

As a molecule moves through the plasma membrane it passes through a hydrophobic layer of phospholipid tails then a hydrophilic l

Firdavs [7]

Answer:

"As a molecule moves through the plasma membrane it passes through a hydrophilic layer of phospholipid heads then a hydrophobic layer of phospholipid tails and then another hydrophilic layer of phospholipid heads".

Explanation:

Biological membranes are formed by two lipidic layers, proteins, and glucans.

Lipids characterize for being amphipathic molecules, which means that they have both a hydrophilic portion and a hydrophobic portion at the same time. These molecules have a lipidic head that corresponds to a negatively charged phosphate group, which is the polar and hydrophilic portion. They also have two lipidic tails that correspond to the hydrocarbon chains -the apolar and hydrophobic portion- of the fatty acids that esterify glycerol.

Membrane lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other, constituting the internal part of the membrane.

Through this lipidic bilayer, some molecules can move from one side of the cell to the other, which happens because of concentration differences. When this occurs, molecules must pass through the hydrophilic layer of phospholipid heads then through the hydrophobic layer of phospholipid tails and then again through another hydrophilic layer of phospholipid heads.

3 0

3 years ago