Which of the following is the distinguishing feature of prokaryotic cells?
Prokaryotic cells have a nucleus.
Prokaryotic cells do not have a cell wall.
Prokaryotic cells do not have a nucleus.
Prokaryotic cells have mitochondria.
Answer: The answer is C
A prokaryotic cell usually lack a well defined nucleus. The correct option is C.
What is a prokaryotic cell?A prokaryotic cell is one that lacks a true nucleus and membrane-bound organelles.
The prokaryotic cell is the foundation of organisms in the domains Bacteria and Archaea.
Thus, the correct option is C.
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Most pneumonia infections are caused by a virus or bacteria. What characteristic could scientist use to distinguish an infection caused by bacteria from an infection caused by a virus? Group of answer choices The bacteria would grow by itself outside the person. The virus would have DNA. The bacteria would make another person sick. The virus would have proteins.
Answer:
The bacteria would grow by itself outside the person
Explanation:
The bacteria would grow by itself outside the person. - this is correct. Bacteria are independent organisms that do not need other cells to replicate. However, viruses require the cell's machinery to divide and cannot survive independently
The virus would have DNA. - Both bacteria and viruses have DNA (or the virus might have RNA)
The bacteria would make another person sick. - Both viruses and bacteria could make another person sick
The virus would have proteins - Both viruses and bacteria have proteins
I’m not sure what the answer is.
Answer:
b DNA and RNA
Explanation:
because those are the two one
I need help please !
Answer:
14. f. diffusion
15. a. excreting waste
16. b. exocytosis
17. a, endocytosis
Explanation:
14. The movement of molecules from a high concentration to a low concentration is diffusion. Active transport uses energy to move molecules against their concentration gradient (from low to high). Osmosis specifically refers to water molecules. Endocytosis is the movement of molecules inside the cells via the cell membrane engulfing it.
15. The membrane controls the substances that enter and exit the cell, therefore it is involved in excreting waste products from inside the cell.
16/17 Endocytosis is engulfing substances to bring them inside the cell. Exocytosis is the reverse process, where substances exit the cell by fusing with the cell membrane. The movement of molecules from a high concentration to a low concentration is diffusion. Osmosis specifically refers to water molecules.
20. Which of the following is/are a base?
HCI
KOH
H20
H2SO4
NaOH
Answer:H2SO4
Explanation:
Answer:
KOH or potassium hydroxide
Explanation:
it is a very strong base reacting violently with acids
more____in our atmosphere make our planet
Answer:
Explanation:
Water molecules are polar, which give water its unique properties. One important property is water is the universal ________
A. Solvent
B. Drink
C. Liquid
D. Solute
Answer:
A. solvent
Explanation:
Its called the universal solvent because its capable of dissolving more substances than any other liquid.
What do all Organism Need? Select three Options
Nervous System
A Place To Live
Blood
Water
Food
Answer:
its blood water food
Explanation:
hope this help the person above me is correct
Answer:
your answers are
B. a place to live
D. water
E. food
Explanation:
What can be used to measure the rate of photosynthesis
Answer:
the answer it at the bottom
Explanation:
Uptake of CO2 by plants: Since CO2 is needed for photosynthesis, measuring how much of it is taken up by the plants gives us information on how much of photosynthesis is happening.
Release of O2: The amount of O2 produced during photosynthesis can be measured.
Water enters a cell when there is more salt IN the cell than the extracellular environment. This is an example
of
a. equilibrium
b. hypotonic
c. isotonic
d. hypertonic
Answer:
it would be b. hypotonic
Disagreement over or competition for a resource is known by which of the following terms?
logistics
conflict
preservation
conservation
Answer:
I think it's Conflict
Explanation:
What is density of a liquid with mass of 17.4 and a volume of 20 mL ? Would this liquid float or sink at room temperature based on its density and the known density of water?
Answer: The density of the liquid is 0.9 g/mL
. Hope this helps but I can not answer the second part. Hope that it is beneficial to you anyway! :)
(Edit) This might help you figure it out: The relative densities of an object and the liquid it is placed in determine whether that object will sink or float. An object that has a higher density than the liquid it's in will sink. An object that has a lower density than the liquid it's in will float.
Explanation:
Answer:
i think it would float tbh
Explanation:
sorry if it isnt correct i am just trying to help
A change in the sequence of a nucleotide in DNA could result in which of the
following?
A.) The end protein will be a different protein but there will be NO change in its
function.
B.) The end protein will be a different protein that could cause a change in its
function.
C.) The DNA would stop working.
D.)The end protein will be the same protein as before the change.
Answer: A
Explanation:
(A) A mutation is a small-scale change in the nucleotide sequence of a DNA molecule. A point mutation is shown but there are several other types of mutation, ... Replication errors can also lead to insertion and deletion mutations ... on function, but longer extensions might interfere with folding of the protein and so result in ...
Observing a human tissue sample under a microscope would be an example of what division of anatomical study?
Answer: Histology is the study of the microscopic anatomy of cells and tissues of plants and animals. It is performed by examining a thin slice (section) of tissue under a light microscope or electron microscope.
Explanation:
help me pleaseeee Cell membranes of all cells are composed of
Nucleic Acids
Carbohydrates
Lipids
O Proteins
Answer:
Okay, I got this from google and my notes but the cells inside of a cell membrane are composed primarily of fatty-acid-based lipids and proteins.
Explanation:
Membrane lipids are principally of two types, phospholipids and sterols (generally cholesterol). These membranes are composed primarily of phospholipids and proteins and are typically described as phospholipid bi-layers. They also contain cholesterol in the phospholipid bilayer.
PLEASE ANSWER ASAP ILL GIVE YOU THE BRAINLIEST AND ALOT OF POINTS
which is an example of how stem cells are currently being used?
1. For generating healthy cells to form replacement organs like brains
2. for directing differentation to treat diabetes and arthritis
3. for testing for possible side effects of a new cancer medication
4. for curing heart disease by regenerating damaged heart tissue
I HEARD THAT 4 IS NOT CORRECT SO PICK THE CORRECT ONE THA ISNT FOUR. ITS FROM EDGE2020
Answer:
1. For generating healthy cells to form replacement organs like brains
Stem cells can be used for curing heart disease by regenerating damaged heart tissue. The correct option is 4.
What is stem cell?Stem cells are the raw materials of the body, the cells that give rise to all subsequent cells with specific responsibilities.
Under the right conditions, stem cells divide to establish more cells known as daughter cells in the body or in a laboratory.
Bone marrow stem cells, for example, may be able to generate bone or cardiac muscle cells.
This research has resulted in early-stage clinical trials to assess the effectiveness and safety of the product in humans.
Adult stem cells, for example, are currently being examined in people suffering from neurological or cardiovascular disease.
Thus, the correct option is 4.
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why must blood glucose levels be carefully controlled?
Answer:
Blood glucose is a sugar that the bloodstream carries to all cells in the body to supply energy. A person needs to keep blood sugar levels within a safe range to reduce the risk of diabetes and heart disease. Blood glucose monitoring measures the amount of sugar that the blood is transporting during a single instant.
Explanation:
Hope this helps you
Do mark me as brainliest
What is the main function of glycolysis in cellular respiration?
O A. To make water molecules
B. To make glucose molecules
C. To breakdown water molecules
D. To breakdown glucose molecules
Answer:
The answer is B. To make glucose molecules
How many calories are in a mg of sodium?? Please help i’m bout to end my life
Molecules that contain carbon and make up livin things
What is agricultural monoculture and why is that bad for crops?
Arteries, veins, and capillaries are part of what system
Answer:
The circulatory system
Explanation:
The circulatory system delivers oxygen and nutrients to cells and takes away wastes. The heart pumps oxygenated and deoxygenated blood on different sides. The types of blood vessels include arteries, capillaries and veins.
The cycle that is critical for the formation of organic compounds is the ___cycle.
Why are cells stained?
1 point
To make the cell turgid
To nourish the cell.
To help in cell multiplication.
To highlight the cell organelles.
Answer:
To highlight the cell organelles
The basic reason that cells are stained is to enhance visualization of the cell or certain cellular components under a microscope.
24. List some examples of cell specialization?
Answer:
trae blood cells
Muscle cells
Part D
Follow these steps and study the table to answer the question,
1. Go to the Weekly US Map: Influenza Summary Update e. At the top of the map, click the back arrow
several times until the map no longer changes. If the current season is shorter than 6 months, view
the previous season with the drop down box. Note how the trends change over time.
2. Review the following data table, which represents the estimated number of deaths, medical visits,
illnesses, and hospitalizations averted by the flu vaccine during several flu seasons.
Averted Deaths
Averted Averted Averted
illnesses Medical Visits Hospitalizations
Pneumonia and Respiratory and
Influenza Circulatory
Deaths Deaths
Fraction
Number Number Number prevented Number Number
(%)
2010-2011 5,039,277 2,514,353 70,821 20.8
3,434
9,880
2011-2012 1,981,571 968,312 39,301
2012-2013 5,628,332 2,701,875 61,522 11.1
1,823
5,280
2013-2014 6,683,929 3,080,284 86,730 21.5
3,840
2014-2015 1,606,813 792,958 47,449
1,419
2015-2016 5,083,498 2,504,323 71,479 18.9
2,882
Season
22.7
1,227
3,618
9,172
7.5
Using the data you just reviewed, create a scientific argument of one to two paragraphs that support or
oppose the current flu vaccine recommendations.
Answer:
Flu vaccinations are fundamental as they reduce the risk of flu illness by over 50%.
Explanation:
Flu vaccinations reduce the risk of flu illness by over 50%. This makes this process extremely important and fundamental for all human beings as they not only protect the person who gets the vaccine, but it also contributes to the prevention of spreading to other people, especially children and older adults who possess a greater risk of developing flu complications.
The antibodies that are produced by the vaccine prevent the flu virus from attaching to a healthy cell. However, if a person has not been vaccinated, the virus will attack the healthy cells because there is an absence of antibodies that prevent this process.
What are limitations that logistic model has?
Answer:
Explanation:
Logistic regression is also vulnerable to overfitting. It cannot be applied to a non-linear problem. It will perform poorly with independent variables which are not correlated to the target and are correlated to each other.
Name all four of the macromolecules. Identify the monomer (building block) for each macromolecule.
Answer:
Lipids - polymers called diglycerides, triglycerides; monomers are glycerol and fatty acids
Proteins - polymers are known as polypeptides; monomers are amino acids
Nucleic Acids - polymers are DNA and RNA; monomers are nucleotides, which are in turn consist of a nitrogenous base, pentose sugar, and phosphate group
Carbohydrates - polymers are polysaccharides and disaccharides*; monomers are monosaccharides (simple sugars)
PLZ BRAINLIEST
Fill in the blanks with the correct word from the list
Answer:
1. Genetic diversity. 2. Cultural value. 3. Greenhouse effect. 4. Biodiversity. 5. Compassion. 6. Species diversity
Explanation:
Pretty sure
When a rapidly moving cold air mass overtakes a slow-moving warm air mass, the result is a(an)
Ans Occluded front
Explanation:
Answer: Occluded front