Answer:
When Frederick Griffith discovered two strains of Streptococci in 1923, the bacteriologists were intrigued by the differences between them: the S (smooth) strain, which produces colonies that are smooth and shiny on a lab plate; the R (rough) strain, which lacks a polysaccharide coat and produces colonies that are rough and irregular on a lab plate.
Explanation:
how many feet of intestines does the average person have
Which of the following does not directly cause erosion?
O Ice
OLichen
ОSun light
oChemicals
Answer:
a ice
Explanation:
ice doesnt cause erosion directly
Which aquatic ecosystem is often compared to a tropical rain forest why?
Answer:
Coral reefs is the answer.
Explanation:
Coral reefs are often called the "tropical rainforests of the sea" for their astounding richness of life. Due to their structural complexity, corals are one of the most productive ecosystems on Earth, providing important services to mankind including fisheries, coastal protection, medicines, recreation, and tourism.
Source: Internet
1. Describe how chemical changes
are
different from physical changes.
Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
Explanation:
Answer:
In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. In a chemical change, the kind of matter changes, and at least one new substance with new properties is formed.
Explanation:
Physical changes are limited to changes that result in a difference in the display without changing the composition.
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Two brothers have thick hair that grows over their faces and most of their bodies.
This human disorder, called Ambra's Syndrome, shows X-linked dominant inheritance. The
mother of the boys is also affected by Ambra's Syndrome, although her excessive hair growth
occurs in various, scattered patches on her skin rather than a continuous coverage like her sons.
What is the most likely explanation for the patchy expression of hairlessness on the mother's
skin?
The most likely explanation for the irregular expression of hairlessness on the mother's skin is codominance
Codominance is a biological term to refer to the hereditary pattern that is characterized by:
In the heterozygous state, there is no recessive allele, but both behave as dominant. Codominance is characterized by the manifestation of both characteristics as dominant, without mixing.According to the above, the irregular expression of the lack of hair in the mother is a manifestation of the codominance of the hair gene and the hairless gene that do not mix but are seen independently.
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below is a view at 1000x magnification of a gram stain of the cerebrospinal fluid. what type of white blood cell predominates in charlie’s csf?
The type of white blood cell that predominated in charlie's CSF is neutrophils.
Cerebrospinal fluid (CSF) is a transparent, colorless plasma ultrafiltrate with little protein and few cells. It is produced in the choroid plexus in the ventricular brain system.
The type of white blood cell that predominated in charlie's CSF is neutrophils. They are granular leucocytes, with active phagocytes. In the cytoplasm, there is the presence of neutral staining granules whose phagocytic activities are integral to subdue the invasion of pathogens.
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a human red blood cell is placed in a solution whose solute concentration is twice as great as the concentration of the cell cytoplasm. The cell membrane is selectively permeable allowing water but not the solutes to pass through. What will happen to the cell? a.) No change b.) the cell will shrivel because of osmosis c.) the cell will swell because of osmosis d.) the cell will shrivel because of active transport of water e.) the cell will swell because of active transport of water
Answer:
the cell will shrivel because of osmosis, moving to the region of higher concentration, and it shrivels due lost of water
How are glucose and ethanol similar in structure and function?
Answer:
Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide as by-products...
Explanation:
Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide as by-products.
What is the surgery that involves trimming excess prostate tissue in order to treat urinary problems that are caused by an enlarged prostate?
Answer:
d. TURP is correct
Explanation: Transurethral resection of the prostate
Which of the following statements would correct one of the roles listed in the table?
Answer:
Glucose combines with water to form carbon dioxide.
Explanation:
Glucose combines with water to form carbon dioxide.
As the troponin changes shape (due to binding calcium), it moves the ______ molecule to which it is attached, thus exposing the active sites on the G-actin molecules.
As the troponin changes shape (due to binding calcium), it moves the tropomysin molecule to which it is attached.
Once calcium binds to troponin and causes it to change it shape, it removes the tropomysin away from the binding site therefore effectively exposing the myosin binding sites.
This occurs during muscle contraction (movement) in the skeletal muscles.
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Answer: tropomyosin
Explanation: just took a quiz :)
What are the three general classes of neurons that correspond to the three major aspects of nervous system function
Plants do not eat, how do they carry out the process of nutrition?
Under the hypothesis of blending inheritance, what color(s) would the offspring of a black cat and a white cat be
Under the hypothesis of blending inheritance, the offspring of a black cat and a white cat would be GREY. This theory is not now accepted.
Blending inheritance is an erroneous theory from the 19th century that proposed that offspring inherit phenotypic traits as 'average values' observed for such traits in their parents.
Mendel's laws of heredity (i.e., the Law of Segregation and the Law of Independent Assortment) showed that blending inheritance is based on erroneous concepts.
Moreover, incomplete dominance is an inheritance pattern different from blending inheritance because incomplete dominance refers to the observation that in certain traits both gene variants or 'alleles' are expressed in heterozygous individuals.
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Some single-celled organisms make copies of themselves through mitosis. Which describes the function of the cell cycle in such single-celled organisms?
Answer:
In unicellular organisms such as bacteria, mitosis is a type of asexual reproduction, making identical copies of a single cell.
Explanation:
Unicellular organisms are asexual which means they don"t need partners.
The process of making sugars in the chloroplast is called??
Answer:
Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells. ... The entire process is called photosynthesis and it all depends on the little green chlorophyll molecules in each chloroplast.
on what basis are populations assigned to the same biological species?
Answer: On What Basis Are Populations Assigned To The Same Biological Species? Answer A Very Similar Appearance Being Able To Interbreed And Produce Fertile Offspring Relating To The Environment In The Same Way Sharing A Common Ancestor Having 99% Of Their Genes In Common
Mutations in proto-oncogenes are generally _____ whereas mutations in tumor-suppressor alleles are generally _____.
Answer:
mutations in proto-oncogene are generally cancerous while mutation in tumor-suppressor alleles are recessive and result lost of function
is SARS a common virus?
Answer: SARS is not a common virus, it is a viral respiratory illness that was recognized as a global threat. it is spread through close contact. Although it is a very serious illness, it is rare to get. only eight persons were laboratory-confirmed as SARS cases.
Explanation:
4. What are the four components of the Earth system?
Lithosphere (land), hydrosphere (water), biosphere (living things), and atmosphere (air)
During the development of skeletal muscle cells, some myoblasts do not fuse and instead become ______ cells.
what is the difference between ribose and deoxyribose
What percentage of body water loss can impact athletic performance?
Enzymes transferring electrons at the start of the ETS are referred to as ________, whereas enzymes transferring electrons to the terminal electron acceptor are designated as ________.Question 40 options:a) sulfatases; nitrogenasesb) lyases; hydrolasesc) permeases; proton pumpsd) dehydrogenases; oxidasese) oxidases; dehydrogenases
Answer:
dehydrogenases; oxidases
Explanation:
When salt water i added to a plant cell why does the cell membrane srink
If a higher concentration of salt is placed outside of the cell membrane, the water will leave the cell to bond with it. The loss of water from this movement causes plant cells to shrink and wilt.
whats one difference between the ways aristotle and theophrastos classified plants?
Answer:
Aristotle classified animals based on where they lived, while Linnaeus instead used an animal's morphology, evidence from both fossil records and living organisms.
Who discovered mercury and what is your source?
Answer: Sumerians
Explanation: www.whodiscoveredit.com/who-discovered-mercury.html
Answer:
Galileo Galilei first discovered mercury my source https://www.nhm.ac.uk/discover/planet-mercury.html#:~:text=Mercury%20is%20one%20of%20the,Galileo%20Galilei%20and%20Thomas%20Harriot. that link
Explanation:
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Plz answer this question: Read the passage and examine the photos. Then, suggest two reasons that scientists think developing pollen grains made vascular plants the most successful plants that live on land.
Answer:
Vascular plants are successful due to better transportation for water, nutrients and reproduction.
The xylem and phloem of the vascular bundles allow for distribution of water and food to all parts of the body.
Help me with this please
Answer:
4.Red
5. gamma waves
5. Gamma waves
Explanation:
if you look at the visible light they label all the colors for you red is at the end closest to increasing wavelength
is there a nutritional difference in brown and white eggs
Answer:
there is no significant difference in nutrients between brown and white eggs.