The appropriate choice must be (A).
What is the role of scientists in society?Science contributes greatly to the generation of knowledge and hence contributes to the operation of democracies, fosters innovation and allows countries to be competitive in the global economy.
The ongoing work of men and women from various nations throughout history has contributed to the existing body of scientific knowledge.
It is not simply wealthy men with money who could conduct experiments and get a scientific conclusion. We are all familiar with Marie Curie, who is renowned for her work in radioactivity and twice earned the Noble Prize.
Of course, advances in science have been accomplished before to the 20th century; for instance, Newton discovered gravity in the 17th century.
Therefore, the existing body of scientific knowledge is not constrained by specific limitations; rather, it is the result of ongoing efforts made by men and women from various nations throughout history.
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How is sucrose moved in sink?
The sucrose moved in sink by active transport.
What is active transport?Active transport is a type of transport in which the cell expends energy to move solutes against their concentration gradients. The sodium-potassium pump is an example of active transport. Active transport differs from passive transport in that the cell does not expend energy.
In this case, the sucrose moves from companion cells in sink elements by active transport. This reduces the water potential of the sink element by osmosis, which increases the hydrostatic pressure.
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What does it mean to describe a scientist as skeptical.
Answer:
To describe a scientist as skeptical means that they question both existing ideas and new hypotheses.
Explanation:
Skepticism is the act of suspending judgment (the opposite of jumping to conclusions) when evaluating an explanation or claims. It allows scientists to consider all possibilities and systematically question all information in the course of an investigation
Why is acetylcholine broken down?
Acetylcholine broken down is the process by which this neurotransmitter activates a suitable ligand-receptor to trigger a cell signaling pathway.
What is Acetylcholine?Acetylcholine is a chemical messenger (i.e., a neurotransmitter) that is used to transmit signals inside the body.
Acetylcholine broken down is due to its hydrolysis, which ends cell signaling between brain synapses.
In conclusion, Acetylcholine broken down is the process by which this neurotransmitter activates a suitable ligand-receptor to trigger a cell signaling pathway.
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What's the PH of the stomach and small intestine
The intraluminal pH is rapidly changed from highly acid in the stomach to about pH 6 in the duodenum. The pH gradually increases in the small intestine from pH 6 to about pH 7.4 in the terminal ileum. The pH drops to 5.7 in the caecum, but again gradually increases, reaching pH 6.7 in the rectum.
The pH of the stomach is acidic while that of small intestine is slightly alkaline.
What is pH?
This is referred to as the power of hydrogen and is the measure of the degree of acidity or alkalinity of a substance.
The stomach contains dil. Hcl which makes it acidic while the small intestine is alkaline because of the presence of bile.
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cells that are thick in the middle and tapered towards the end are called _________ cells
Cells that are thick in the middle and tapered towards the end are called fusiform cells
What are fusiform cells?Fusiform cells are those cells that has a spindle-like structure which means that it is thinner at the extremes and larger at the center.
A typical example of fusiform cell are the cells of the dorsal cochlear nucleus (DCN).
Therefore, cells that are thick in the middle and tapered towards the end are called fusiform cells
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which of the following is not an important er-resident enzyme that modifies proteins in the secretory pathway?
The option that is not an important er-resident enzyme that modifies proteins in the secretory pathway is D) Sec61.
What are the ER enzymes?The smooth ERare those enzymes that take part in the synthesis of lipids as well as the phospholipids, and they carry out important role in the formation of new cellular membrane.
Some important er-resident enzyme are:
oligosaccharyl transferase BiPprotein disulfide isomeraseTherefore , option D is correct.
The options for the question are:
A) oligosaccharyl transferase
B) BiP
C) protein disulfide isomerase
D) Sec61
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Which item is a carbon source?
OA. Burning of fossil fuels
OB. Fossil-fuel deposits
O C. Limestone rock formations
OD. Replanting of rain forests
Answer:
A
Explanation:
Burning of fossil fuels
Why the nucleus can’t be seen at end of prophase in eukaryotic cell?
Is it because the nucleus breaks down or nuclear membrane and why? Please
The nucleus can't be seen at the end because the nucleus envelope breaks down and nucleus disappears
Explanation :-
** chromosomes contract , spiral and becomes visible even in light microscope and nucleoli becomes smaller(material to chromosomes)
** chromosomes split length wise to form chromatids connected by centromeres
** nuclear membrane breaks down
** nucleus disappears
The part of the vertebrae that transfers weight along the axis of the vertebral column is the:.
The part of the vertebrae that transfers weight along the axis of the vertebral column is the:. vertebral body
What is the vertebral body?
The vertebral body serves as a weight-bearing part of a vertebra. The vertebral body is a thick and disc-shaped structure and forms the anterior portion of the vertebrae.
A vertebral body has rough inferior and superior surfaces. Being disc-shaped, the vertebral bodies of subsequent vertebrae are stacked upon each other and thereby, serve to carry the weight.
Thus, the vertebral body is the answer.
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Which endocrine gland releases a hormone to regulate calcium levels in the bloodstream ? A. Thyroid B. Pituitary gland C. Adrenal gland D. Pancreas
Answer:
b
Explanation:
Parathyroid glands release a hormone to regulate calcium levels in the bloodstream the regulation of calcium levels in the blood.
Explanations:
Endocrine glands are the gland that secret hormone directly into the blood for creating certain stimuli. Parathyroid glands produce parathyroid hormone, which plays a key role in the regulation of calcium levels in the blood. The parathyroid glands are two pairs of small, oval-shaped glands. They are located next to the two thyroid gland lobes in the neck. Each gland is usually about the size of a pea.
functions:
Release of calcium by bones into the bloodstreamAbsorption of calcium from food by the intestinesConservation of calcium by the kidneysStimulates cells in the kidney to transform weaker forms of vitamin D into the form that is strongest at absorbing calcium from the intestines
therefore, option A is the correct answer.
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Chromosomes contain different amounts of:
Answer:
DNA srry if im wrong
Explanation:
Answer:
DNA
Explanation:
A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.
A student drew this model to show the gas exchange in the human body.
a diagram of the transport of oxygen and carbon dioxide around the body in the blood, from the lungs to the organs and again to the lungs
What are the strengths of the model the student created?
Answer:
gases
Explanation:
one strength would be that the graph clearly shows the gases and pathway of the gases which are taken in and used in exhalation.
which organism causes gastroenteritis and is possibly transmitted through the respiratory route in addition to the fecal-oral route
An organism causes gastroenteritis and is possibly transmitted through the respiratory route in addition to the fecal-oral route Noroviruses.
What is gastroenteritis?The term "gastroenteritis" refers to irritation and inflammation of the digestive tract, including the stomach and intestines.
The most common causes are viral agents, bacteria, parasites and food poisoning, and the most common complaints are diarrhoea, abdominal pain, cramps, nausea and vomiting.
Noroviruses are the leading cause of adult gastroenteritis in North America and are responsible for projectile vomiting in infected individuals.
Thus, Noroviruses is the answer.
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How are microtubules built and destroyed?
Microtubules are generated by polymerization of dimer subunits of alpha and beta-tubulin.
What are microtubules?Microtubules are essential proteins of the cytoskeleton that provide structural support to the cell.
Alpha and beta-tubulin subunits are arranged in a repeated way to form protofilaments, whereas molecular motors are proteins that disassemble microtubules.
In conclusion, microtubules are generated by polymerization of dimer subunits of alpha and beta-tubulin.
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Comparable segments of the mitochondrial DNA sequences of two similar species are shown below. This segment of DNA mutates at a rate of two base pair per 330,000. years. The DNA sequences for Species A is CTGTCCGAAG and Species B is CTGTCCGTCG. How many years ago did these species diverge from a common ancestor? 660,000 years ago
33 years ago
330,000 years ago
6,000 years ago
The homo-logous mitochondrial sequences CTGTCCGAAG and CTGTCCGTCG suggest that species diverge from a common ancestor 660,000 years ago.
What is the mutation rate?The mutation rate indicates the number of nucleotide differences between two homo-logous sequences that emerged in evolution in a given period of time.
In this case, the mutation rate is one nucleotide per 330,000 years and here we have two mutations (CTGTCCGAAG and CTGTCCGTCG), thereby it is expected that the sequences diverged 660,000 years ago.
In conclusion, the homo-logous mitochondrial sequences CTGTCCGAAG and CTGTCCGTCG suggest that species diverge from a common ancestor 660,000 years ago.
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Fungi are divided into subgroups based on their methods of ____________.
Fungi are divided into subgroups based on their methods of sexual reproduction.
Fungi divisionFungi are divided into 4 groups, namely:
ChytridiomycotaZygomycotaAscomycotaBasidiomycotaThe division into the different groups is based on the methods of sexual reproduction used.
Zygomycota produce zygosporesAscomycota produce ascosporesBasidiomycota produce basidiosporesChytridiomycota produce diploid zoosporesMore on fungi can be found here: https://brainly.com/question/1261179
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Use the following vocabulary words in a coherent paragraph using the image below as a resource. Highlight your vocabulary words.
Transmit Absorb Frequency Light Energy Reflection Transparent
(image attached)
thank you!! WILL GIVE BRAINLIEST!!
Answer:
Transmit - cause (something) to pass on from one place or person to another.
Absorb - take in or soak up (energy or a liquid or other substance) by chemical or physical action.
Frequency - the rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light), usually measured per second.
Light Energy - Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes. Light is defined as a form of electromagnetic radiation emitted by hot objects like lasers, bulbs, and the sun.
Reflection - the throwing back by a body or surface of light, heat, or sound without absorbing it.
Transparent - (of a material or article) allowing light to pass through so that objects behind can be distinctly seen.
Answer:
In the photo to the left, we can see a red tomato. This tomato appears red because of how it is interacting with the light energy it is receiving. It is reflecting red, and absorbing all other colors: orange, yellow, green, blue, and violet. In this depiction, you can see an entire rainbow of colors going into the apple and only red coming/bouncing (reflecting) back off. You can also see the green of the stem, which is colored in the same way. It absorbs certain frequencies of light--all other colors of light than green--and reflects certain frequencies of light, green light.
In this image, we are able to see the apple and stem because the air/medium that we are seeing this image through is transparent. If the surroundings were opaque, we wouldn’t see red at all (all colors would be blocked if light is blocked).
Another transparent factor in this image are light waves. Actual lightwaves (unless they are being refracted in such a way that they are being spread out--like a laser beam hitting a spray of water mist) are transparent.
You wouldn’t be able to see the [red] lightwaves bouncing off, you would only see the red of the apple. When light is being refracted by a different translucent material--such as glass, plastic, and water--that material is also transmitting the light, it is passing on the light wave. This is when refraction/the bending of light due to a change in media occurs.
hope this helps!!
proteins not expressed on normal cells but found on tumor cells are called _____.
Proteins not expressed on normal cells but found on tumor cells are called tumor specific antigen.
What are cancer cells?Cancer cells are cells whose cells cycles and growth has been altered as a result of mutation in their DNA resulting in abnormally high growth rates.
Cancer cells are also called tumor cells.
Proteins that are expressed in tumor cells but not on normal cells are called tumor specific antigen.
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what energy is transferred during translation
Answer:
Guanosine triphosphate (GTP)
Explanation:
a purine nucleotide triphosphate, acts as an energy source during translation
The scientific evidence that scientists use in supporting or critiquing the conclusions of experiments usually consists of
A) raw data
B) outlier data
C) precise data
D) summarized data
Answer:
The answer is A raw data i think I'm not sure
I need help. The diagram below represents levels of organization in living things. Which term would best represent X?
Sometimes when organisms evolve, it gives rise to multiple species that can coexist simultaneously. Give an example supporting this statement.
need answer asap
The finches may have speciated from the Galápagos finch and now occupy different habitats.
What is speciation?
The term speciation has to do with a type of evolution that gives rise to new organisms from existing ones. It is common in the world today. These ne organisms all tend to coexist with each but may not be on the same habitat.
For instance, the finches may have speciated from the Galápagos finch and now occupy different habitats.
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All cells have ribosomes.
However, some cells have more
ribosomes than others.
the
Which cells have the MOST
ribosomes?
A. Cells that produce proteins.
B. Cells that produce energy.
C. Cells that are involved in reproduction.
Answer:
B
Explanation:
Ribosomes main purpose is to make proteins from the process called translation. This is the second step in the process.
A hypertonic solution has:
Fewer water molecules outside the cell than are inside the cell
More water molecules outside the cell than are inside the cell
The same number of water molecules inside and outside of the cell
No water inside or outside of the cell
A hypertonic solution has:
Fewer water molecules outside the cell than are inside the cell. Thus, option "A" is correct.
What is hypertonic solution?The cell is in a hypertonic solution because it lost water through osmosis and shrunk.A hypertonic solution contains more solute molecules compared to solvent molecules while the hypotonic solution has more solvent molecules than solute molecules.When a plant cell is placed in a hypertonic solution it loses water through osmosis and shrinks.An animal cell placed in a hypotonic solution absorbs water through osmosis, increases in size and then bursts. Plant cell, on the other hand, does not burst when placed in a hypotonic solution as it contains a cellulose cell wall.Thus, option "A" is correct.
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When there are a lot of molecules in one place it is considered an area of:
When there are a lot of molecules in one place it is considered an area of High concentration.
What are molecules?
A molecule is a collection of two or more atoms held together by the attractive forces known as chemical bonds.
The movement of molecules from a region with a high concentration to one with a lower concentration is known as diffusion. Diffusion is the passage of tiny molecules across the cell membrane during cell transport.
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Explanation:
High concentration
Mark the word lot of moleculesIt refers to colligative property which is directly proportional to no of moleculesThen it is denoting that concentration is moreHence high concentration is correct
A decrease in the autonomic tone of the smooth muscle in a blood vessel would result in:.
A decrease in the autonomic tone of the smooth muscle in a blood vessel would result in an increase in blood flow through the vessel.
Meaning of smooth musclesmooth muscle can be defined as a muscle in the body that is non striated and involuntary in nature.
Smooth muscles are mostly found in hollow organs, passageways and tracts of some systems.
In conclusion, A decrease in the autonomic tone of the smooth muscle in a blood vessel would result in an increase in blood flow through the vessel.
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Which are the only two photic zones in the ocean?
a. Epipelagic and Abyssopelagic
b. Mesopelagic and Epipelagic
c. Epipelagic and Bathypelagic
d. Abyssopelagic and Bathypelagic
Part b is the answer- Mesopelagic and Epipelagic
Answer: d. Abyssopelagic and Bathypelagic
HELPPP I need someone who’s really good at biology to help with my midterm I have less than a week and I’m barely half ways done
I’ll give you my accellus log in if you are serious and willing to help !! PLEASE ILL BE YOUR BEST FRIEND
Answer:
I could help!
Explanation:
i just took bio last year and got a 5 on the EOC
Select the correct text in the passage.
Which phrase indicates a limit to the scientific accuracy of the experiment?
For the study of a particular drug, Marcus proposes an experiment with a particular population. Approximately 200,000 people in the United States take this drug. He started out with a sample size of 300 people. First, he conducts research on the medical history of the people in his study. He collects the information using reliable sources. He decides to repeat the experiment using a larger sample size.
The phrase that indicates a limit to the scientific accuracy of the experiment is to repeat the experiment using a larger sample size.
What is Scientific accuracy?Scientific accuracy may be defined as the correctness of a single measurement that should be accomplished by scientists during their practical experiments.
The complete question is as follows:
the sample size of 300 people.research on the medical historycollects the information using reliable sourcesrepeat the experiment using a larger sample size.The sample size will always play an active role in research. It also has a big impact on the accuracy of a scientific study. A larger sample size gives the most accurate results as compared to small sample size.
Therefore, the correct option is D.
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Answer:
" a sample size of 300 people "
Hope this helps!
Explanation:
Select the correct answer from each drop-down menu.
The nervous system and the muscle system respond to stimuli to produce motion. The movements of
muscles are mostly voluntary. Involuntary movements occur in these muscles when the nerve impulse passes from a sensory neuron to a motor neuron via an interneuron in the
.
The nervous system and muscular system respond to stimuli to produce movement.
What is nervous impulse?
The nerve impulse corresponds to an electrical current that propagates through neurons, thanks to a process of membrane depolarization. This depolarization process occurs through stimuli and its function is to transmit certain information to other cells (nervous, muscular or glandular).
With this information, we can conclude that the nervous system and muscular system respond to stimuli to produce movement.
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Answer:
skeletal
spinal cord
Explanation:
just took test on edmentum and got 5/5
