Answer: Gram-positive bacteria.
Explanation:
Gram-positive bacteria are those bacteria that stain dark blue or violet by Gram staining. This is due to the structure of the cell envelope, since they possess a cell wall composed of a thick layer of peptidoglycan, which surrounds the previous one. The cell wall is attached to the cytoplasmic membrane by lipoteichoic acid molecules. The peptidoglycan layer confers high resistance to these bacteria and is responsible for retaining the stain during Gram staining. Unlike gram-positive bacteria, gram-negative bacteria have a second lipid membrane outside the cell wall and a single peptidoglycan layer.
An antibiotic is a chemical substance produced by a living being or synthetically derived, which kills or prevents the growth of certain classes of sensitive microorganisms, such as bacteria. An antibiotic could be bacteriostatic if it prevents the growth of bacteria or bactericidal if it destroys them.
Antibiotics usually attack cell walls, such as β-lactams that act on the peptide chains of the bacterial cell wall. That is, they act by inhibiting peptidoglycan synthesis. This is why gram-positive bacteria are susceptible to certain types of antibiotics because they possess a large amount of peptidoglycan.
1. Most students in Britain take the GCSE when ____________.
A. They are 11 years old
B. They are 16 years old
C. They finish grade 10
D. They begin grade 11
2. What is the first thing you’ll notice when you visit almost any school in Britain?
A. The school logo
B. The school gate
C. The school playground
D. The school uniform
3. What do most teenagers in Britain prefer to wear?
A. Trendy labels
B. Expensive uniforms
C. Fashionable hats
D. Economical trainers
4. The word ‘highlight’ in paragraph 2 is closest in meaning to __________ .
A. Confuse
B. Remark
C. Emphasise
D. Decrease
5. According to the passage, which of the following statements is NOT true?
A. Students in Britain can take 8 subjects at the GCSE.
B. Most British teenagers spend 2-3 hours watching TV after school.
C. Most 16-year-old students in Britain don’t like school uniforms.
D. Many British teenagers judge their friends by their shirts or trainers.
Answer:
1.c
2.d
3 .d
4.a
5.c
this is all I got
Describe two specialized cells in the respiratory system that enable the lungs to function?
Answer:
Respiratory epithelial cells line the respiratory tract from trachea to bronchi into bronchioles and alveolar sacs. ... The goblet cells produce and secrete mucous to trap pathogens and debris within the airway tract. Basal cells are progenitor cells that differentiate into cells types found within the epithelium.
write at least 4 dyes used for staining?
Answer:
Staining dyes are dyes used for staining in microbiology and histology.
describe the role of enzymes in seeds germination
) An allosteric interaction between a ligand and a protein is one in which: (3 pts) A) binding of a molecule to a binding site affects binding of additional molecules to the same site. B) binding of a molecule to a binding site affects binding properties of another site on the protein. C) binding of the ligand to the protein is covalent. D) multiple molecules of the same ligand can bind to the same binding site. E) two different ligands can bind to the same binding site.
Answer:
B) binding of a molecule to a binding site affects the binding properties of another site on the protein.
Explanation:
In an allosteric interaction between a protein and a ligand, the ligand binds to a site in the protein. As a result, there is a change in the properties of other active sites on the protein. These active-site changes may or may not allow the protein to bind to other molecules. There is a change in the protein that affects the affinity of the active site for other molecules. The affinity on the active site increases if the protein binds to an activator and decreases if the protein binds to an inhibitor molecule.
is a hair tie a good example for the cytoplasm since a hair tie holds your hair together as the cytoplasm does to the rest of the organelles?
Answer:
I don't see why not, I mean, based on what I remember about my biology, I think that's a great example. :)
What Creates local winds ?
A. As hot air sinks and cold air rises winds are formed
B. As cold air sinks and hot air rises winds are formed
C. As Precipitation falls winds are formed
Answer:
B
Explanation:
hot air rises because it is less dense and cold air sinks because it is more dense. for example if he had a balloon and it was in the freezer it would shrink however if you were to leave it out for a little while it would expand.
Question 6 of 25
Which is an example of a vestigial structure?
A. Raccoon tail
B. Fish gills
C. Whale pelvis bone
D. Human arm
help:,)
the answer for your question is D
why us a spirogyra called a thallus ? which types of nutrition does it show ?why?
Explanation:
a plant body that is not differentiated into stem and leaves and lacks true roots and a vascular system. hence spirogyra called a thallus.
Spirogyra is an example of Green algae , thus it prepare its own food by process of photosynthesis in presence of sunlight and chlorophyll.So, its nutrition type is Autorophic.
What is one of the negative consequences of burning waste?
A. It reduces consumption
B. It pollutes the groundwater
C. It contributes to climate change
D. It creates runoff
Answer:
B. It pollutes the groundwater.
Answer:
B. It pollutes the groundwater.
Lizard is a poikilothermic animal give reason please
Answer:
Both reptiles and amphibians are poikilothermic, which means that they cannot regulate their own body temperatures internally
3. What is the change in a population's allelic frequency due to chance?
natural selection
gene pool
genetic drift
allelic frequency
Answer:
option c is the answer to this question
genetic drift is the answer
Name three kinds of prokaryotic cells
Answer:
Euryarchaeota
Crenarchaeota
Nanoarchaeota
Answer:
lactobacillus acidophilus.
Cyanobacteria.
Archaea.
Both anaerobic and aerobic respiration use what to produce ATP and NADH?
Answer
glucozo
Explanation:
Which of the following could your family do to lower its carbon footprint?
Answer:
That's correct
Explanation:
Insulating homes lower footprint
Set the thermostat 2 degree warmer in winters could lower your family carbon footprint.
What is carbon foot print ?
A carbon footprint is the total amount of greenhouse gases (including carbon dioxide and methane) that are generated by our actions.
What does reducing carbon foot print mean?Reducing your carbon footprint at home typically means consuming less energy.
To learn more about carbon footprint , here
https://brainly.com/question/24102961?referrer=searchResults
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When the Earth's rotation naturally brings water away from the
equator and moves cold water close to the surface Westerly
winds begin to strengthen again. What does this signal?
O A. The midpoint of the Coriolis Cycle
O
B. The beginning of El Nino
O c. The end of El Nino
OD. The beginning of an Ice Age
A scientist hypothesized that oxygen atoms from both carbon dioxide and water are used to make glucose during photosynthesis. However, experimental results using oxygen isotopes showed that all of the oxygen from the water ended up in the oxygen molecules that were produced. None of the oxygen from water was found in glucose.
What should the scientist do to best gain scientific understanding of this topic?
a. Analyze the results, and change the experimental methods to retest the hypotheses in a different way.
b. Discard the faulty results that do not support the original hypothesis, and repeat the experiment using the same methods.
c. Analyze the procedural errors that took place in the experiment, and summarize these in a conclusion statement.
d. Repeat the experiment and adjust new data to support the original hypothesis.
The scientist Discard the faulty results that do not support the original hypothesis, and repeat the experiment using the same methods; option B.
What is an experiment?An experiment is a research or test conducted in order to prove or disprove a hypothesis.
An experiment is conducted using steps or procedures based on an explanation given to an observation.
The results of the experiment by the scientist disproved his hypothesis.
Therefore, the scientist should discard the faulty results that do not support the original hypothesis, and repeat the experiment using the same methods.
Learn more about experiments at: https://brainly.com/question/17274244
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6.Explain how animals in Vertebrata are classified into further subgroups.
Answer:
Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals
1 A large quantity of fertiliser has been washed into a stream. Decide whether the following 'rise' or 'fall'.
a) Concentration of minerals in the water
b) Total biomass of algae
c) Light levels below the surface
d) Amount of photosynthesis below the surface
e) Mass of decomposing organic matter f ) Number of bacteria
g ) Amount of respiration below the surface
h ) Amount of oxygen dissolved in the water
i) Number of mayfly nymphs in the water j) Number of fish in the water
When cells are damaged, they release proteins called ____ ?
inflammatory chemical signals that evoke local vasodilation
What is another name for data?
A) square root
B) addition
C) subtraction
D) information
Answer:
the correct answer is option ( D )
Hope it helps you
Mark my answer as brainlist
have a nice day
Answer:
the answer is information
Why are fungi more like animals than plants?
PLEASE HELP ME
Answer:
Hey mate.....
Explanation:
This is ur answer.....
However, unlike plants, fungi do not contain the green pigment chlorophyll and therefore are incapable of photosynthesis. That is, they cannot generate their own food carbohydrates by using energy from light. This makes them more like animals in terms of their food habits.
Hope it helps!
Brainliest pls!
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Which of the following represents a mutualistic relationship?
1 point
Both organisms benefit
Both organisms do not benefit
One benefits and the other is unchanged
One benefits and the other is harmed
Using the drop down menus, identify the structures common to all cells.
Answer:
i need the choices
Explanation:
In the 1950s the structure of DNA was discovered by using models and x-ray chromatography currently science has used advanced technology to completely map out the genes in a human's body. What would be the best advantage of using this information?
Answer:
Gene therapy to correct defective genes that cause diseases.
Explanation:
Gene therapy refers to the procedure that involves the introduction of nucleic acids (DNA or RNA) into the cells of an organism for the purpose of correcting abnormalities, such as a mutations or in other words to treat a genetic disease.Gene therapy entails bringing a normal and functional gene known as a trans-gene into a cell with altered gene. Another method can bring RNA capable of partially regulating or blocking the expression of an altered gene.The nucleic acids are introduced into the patient's cells by means of a viral vector or injected directly into the cells in the form of naked DNA.pls mark brainliest
Annette has her thyroid gland removed because of a malignant tumor. She takes synthetic thyroid hormone to replace the thyroxine that her thyroid gland would have produced, but she is worried about her blood calcium level since she has lost her source of calcitonin. Does she need to worry about this problem
Answer:
She doesn't need to worry if her parathyroid glands are working.
Explanation:
Although Annette has to worry about the impacts of thyroid gland removal and synthetic thyroid hormone intake, the calcium levels in her body need not be a concern as long as her parathyroid glands are functioning normally.
This is because the parathyroid glands are responsible for regulating calcium levels in the blood, through the production of parathyroid hormones or parathormone.
Help needed in biology…!
Answers:
viii) ATP
ix) To extract its chlorophyll
x) Amino Acids
xi) Aquatic submerged plants
xii) Rapid blood flow at high pressure
Hope this helps!
[I learned this in Bio this year so I know the answers]
Reset
Which of the following is TRUE about osmosis?
i. Osmosis is a type of active transport.
ii. Kidney dialysis is an example of osmosis process.
HELP!!!!!!!!!! Which of the following statements regarding membrane transport is false? I will mark brainliest!!!!!!!
Answer:
It is the 3rd one I believe
What is not an issue regarding DNA identification?
(A) It is not very reliable
(B) Having databases of millions of DNA profiles can result in more incorrect coincidental matches with partial samples
(C) There is disagreement about whose DNA should be included in the database
(D) Private information related to peoples genetic makeup could get out, which could result in discrimination against them on that basis
Answer:
(A) It is not very reliable
Explanation:
Having a database would cause lots of issues and disagreements
