Answer:
Prokaryotes lack a true nucleus with well defined nuclear membrane and other membrane-bound organelles. Mitochondria are the double membrane bound organelle and hence is absent in prokaryotes. Mesosome is an extension of the cell membrane presence in the cytoplasm as infolding and serves to increases surface area and as a site for cellular respiration in prokaryotes. Histones are positively charged proteins that serve in the packaging of negatively charged eukaryotic DNA but are absent in prokaryotes.
So, the correct answer is option A.(DNA is complexed with histones).
The statement which is not true for prokaryotic cell is that they are all parasitic. Thus, the correct option is C.
What is Prokaryotic cell?Prokaryotes are the organisms whose cells lack a nucleus and other membrane-bound organelles. Prokaryotic organisms are divided into two distinct groups which are the bacteria and the archaea, which scientists believe to have the unique evolutionary lineages. Most of the prokaryotes are small in size, single-celled organisms which have a relatively simple structure.
Examples of prokaryotic organisms are blue-green algae, bacteria and mycoplasma. Among the prokaryotes, bacteria are the most common and multiply very fast.
Therefore, the correct option is C.
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Your question is incomplete, most probably the complete question is:
Which one of the following is not true of prokaryotes ?
(a) They are living cells
(b) They lack a nucleus
(c) They all are parasitic
(d) They are both archaea and bacteria
What speed do thorn bugs move at?
Answer:
they are not built for speed, and often move quite slowly.
Explanation:
<3
?????!!!!!!!!!!!Help
Answer:
1. lysis
2. Synthesis
3. polymer
4. Hydro (hydrolysis)
5. dehydrate
6. monomer
I believe these are the correct answers...
PLEASE HELP URGENT QUESTION NEEDED ASAP PLEASE BIOLOGY
QUESTION:
Generate an argument about whether or not viruses should be considered living or nonliving. Use at least two pieces of data to back up your claim.
Answer:
viruses are non living when they are not in another living being
But when they get into a living being,the virus cell produces more of the virus cells and in the end the host cell explodes
viruses are non living when they are not in another living being is the correct answer
During a running race, a person's breathing rate and heart rate increase. These changes most directly help the person do which of the following?
A. increase the rate of digestion.
B. decrease the rate of gamete production.
C. decrease the rate of protein synthesis in neurons.
D. increase the rate of cellular respiration in mitochondria.
Answer:
D. increase the rate of cellular respiration in mitochondria
These changes most directly help the person to increase the rate of cellular respiration in mitochondria.
What is cellular respiration?Cellular respiration is a series of metabolic processes that take place within a cell of an organism.
During a running race, a person's breathing rate and heart rate increase. These changes most directly help the person to increase the rate of cellular respiration in mitochondria.
Thus, the correct option is D " increase the rate of cellular respiration in mitochondria."
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30 POINTS
The chart below shows the atomic numbers and mass numbers for two elements. Element 2 has a greater atomic number and mass number that element 1.
Element 1
Atomic number 26
Mass number 56
Element 2
Atomic number 31
Mass number 70
How many more neutrons does element 2 have than element 1?
5
14
9
39
Answer:
9
Explanation:
i took the hmh test
Why do some croplands suffer from excessive soil salinity?
If we are moving the decimal point to the left we are moving from a ___________ unit to a _______________ unit.
Which behavior is both territorial and used for courtship?
1.) baring teeth as a sign of aggression 2.) sparring or wrestling using antlers or horns
3.) dance rituals with potential partners
4.)defending a nest from predators
Answer:
2.) sparring or wrestling using antlers or horns
Explanation:
Territorial behavior is defined as the animal behavior in which animals protect their territory from other species.
Courtship behavior is defined as the animal behavior that is involved in mating and eventual reproduction.
Sparring or wrestling using antlers or horns is both territorial and used for courtship. Many animals or males uses their antlers or horns for wrestling or to fight with other animals to protect their territory while some males are involved in ritualized mating behaviors that include antler wrestling (sparring). The loud vocalizations during antler wrestling show the dominance of males that females and leads to mating.
Hence, the correct answer is "2.) sparring or wrestling using antlers or horns".
Name at least 2 parts of the cell that form Vesicles to transport materials around the
cell.
Answer:
golgi apparatus and the endoplasmic reticulum
A sarcomere is...
A. an organ
B. a protein filament or fiber
C. the basic contractile unit of muscle contraction
D.an organelle
Answer:
C, basic contractile unit of muscle fiber.
Explanation:
If you read the definition of sarcomere, this is what it says: "A sarcomere (Greek σάρξ sarx "flesh", μέρος meros "part") is the complicated unit of striated muscle tissue. It is the repeating unit between two Z lines. Skeletal muscles are composed of tubular muscle cells (myocytes called muscle fibers or myofibers) which are formed in a process known as myogenesis."
hope this helps.
Need help ASAP
You will be required to write a paragraph on anything related to science. A paragraph consists of at least one introductory sentence, three supporting sentences and a concluding sentence. Think of a topic that interests you and it will be much easier for you to write about it.
Answer:
The theory of Continental Drift suggest that hundreds of years ago all the continents were one big continent called Pangea. Soon these contintents split up created the places that we live today. This theory was introduced by Alfred Wegener. His colleges thought he was crazy, but later studies proved his impossible theory to be true. By the process of "sea floor spreading" the continents were then ripped apart and drifted to where they are today.
Choose one human body system and describe the major organs that make up the system.
Answer:
respiratory system
-heart
-Lungs
-trachea
-pulmonary blood vessels
-pharynx
-oral cavity
-nasal cavity
according to Google ofcourse.....
When a parent is genetically unchanged
A) Heredity
B) Hybrid
C) Purebred
D)Cross
Two things you would do to help determine if these things are living
Answer:
Explanation:
"All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, adaptation, growth and development, homeostasis, energy processing, and evolution. When viewed together, these characteristics serve to define life."
what process is responsible for removing waste from the cell?
Answer:
Cellular Stomach
Explanation:
Containing acid and several types of digestive enzymes, lysosomes digest unwanted organelles in a process termed autophagy, from the Greek words for “self” and “eat.” The multipurpose lysosome also processes proteins, bacteria and other “food” the cell has engulfed.
Help Plz!!
Eliminate one word from each list and explain why you were able to eliminate it.
1. dog, cat, whale, oyster, mushroom
2. prokaryotic, eukaryotic, nucleus
3. bacteria, archaea, eukarya
4. fungi, animalia, plantae
5. sunflower, oak tree, button mushroom
*I also report incomplete answers, so please answer completely*
Answer:
1. mushroom
2. nucleus
3. eukarya
4. animalia
5. button mushroom
Explanation:
1. Mushroom because everything else in the list is an animal, while a mushroom is a fungi.
2. Nucleus because eukaryotic and prokaryotic are types of formations of a cell, while a nucleus is part of a cell and not a cell formation.
3. Eukarya because the Eukarya include all animals, plants, fungi, and protists. These organisms are eukaryotes, meaning they have membrane-enclosed nuclei within their cells. The Bacteria and Archaea are both considered prokaryotes, because their cells lack true nuclei, meaning a membrane does not enclose their genetic material.
4. Animalia because fungi and plantae are stationary organisms, while animalia are mobile. (ex. fungi and plantae= roots and animalia= feet/ not attached to one place)
5. Button mushroom because sunflowers and oak trees are producers, while a button mushroom is a decomposer.
Each student in a science class of 25 performed the same experiment. Each student shares their data and it is
recoded on a class data table. Tamara compared the data that she personally collected in her experiment to the
data collected by the rest of her classmates.
Which of the following might indicate to her that her results are valid?
Answer: three other classes performed the same experiment.
Explanation:
What causes the isopods to move to a specific area?
Answer:
Effects on biodiversity at different scales, geographical regions, and environments. Mostly humidity and temperature.
Explanation:
Isopod distribution is tightly connected to available habitats and habitat features at a fine spatial scale, even though different species may exhibit a variety of responses
Baking soda, Black coffee, Distilled water, Lemon juice out of these 4 item, which the strongest acid? How do you know?
Answer:
Baking soda is the strongest acid I think. I learned it in bio.
Explanation:
Hope this helps!
What impact does deforestation have on the carbon cycle?
Answer:
Deforestation can affect the water cycle and the carbon cycle. It will decrease the amount of transpiration. It will also increase the amount of carbon dioxide in the atmosphere by releasing the carbon dioxide as trees are burned and by decreasing photosynthesis.
Quick please whoever answer’s it correct will get brainliest answer.
Study the Image
Which point shows the trade winds?
1
2
3
4
Answer:
2
Explanation:
saw it on brainy like last year and that was the correct answer
Two proteins in the same cell perform different functions. This is because 2 points the two proteins are composed of what?
Answer:
It is composed of a single strand of nucleotides
Explanation:
What happens if there is no oxygen in cellular respiration of glucose?
five waste product of plants
Answer:
Oxygen, Carbon dioxide, glucose, leaves and bark.
:)
Which structure allows molecules to pass in and out of the cell?
The answer is the cell membrane in animal cells.
Answer:
b.chlorapast
Explanation:
What effect does the Coriolis Effect have on surface currents in the Northern and Southern Hemispheres?
Answer:
Coriolis effect
the result of Earth's rotation on weather patterns and ocean currents. The Coriolis effect makes storms swirl clockwise in the Southern hemisphere and counterclockwise in the Northern Hemisphere.
How long did the initial contamination of the Hudson River last?
Answer:
30 years
Explanation:
Answer:
30 Years
Explanation:
The Hudson river was contaminated in 1947-1977. Which is about 30 years
4. This is the step in the scientific method in which you explain your results and whether your
hypothesis was correct.
a research
c. conclusion
b. results
d. hypothesis
Answer:
C conclusion
Explanation:
After doing experiment and making a hypothesis and getting results you make a conclusion about your results
Answer:
c. conclusion
Explanation:
The conclusion is the part where you make a conclusion about the results you got. Was your hypothesis correct or incorrect? Does the experiment have to be done again maybe in a different way? etc.
Therefore, it is answer c.
Help needed! Just answer the question!
PICTURE BELOW! <3
Answer:
B
Explanation:
for the second part
Which of the following best explains why a cell's plasma membrane is composed of two layers of phospholipids rather than just a single layer?
Answer: The hydrophilic tails are directed inward and the hydrophobic heads are directed outwards.
Explanation:
A phospholipid is made up of two ends a hydrophilic or water-loving end that is phosphate head and a hydrophobic tail that is made up of fatty acid tail. The arrangement of phospholipid in a bilayer structure allows the entry of oxygen, carbon dioxide, and lipids to pass through them via concentration gradient via simple diffusion.
Lipids are amphipathic molecules that compose the membrane. Membrane lipidic bilayers allow only the hydrophilic heads to interact with water inside and outside the cell, while hydrophobic tails remain in the interlayer space, away from water.
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Two lipidic layers compose the cell membrane. There are also proteins and glucans incrusted in between.
Since lipids are amphipathic molecules with hydrophilic heads -negatively charged phosphate group- and hydrophobic tails, they need to form two opposite layers.
Lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells in contact with water. Meanwhile, their hydrophobic tails are against each other, constituting the internal part of the membrane.
Membranes are fluid, meaning that lipids and proteins composing them can move laterally, transversally, or rotationally.
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