The cells were first discovered when a scientist named Robert Hooke observed cell walls in cork under a microscope.
Who was Robert Hooke and what was his importance for cytology?Robert Hooke's observation made it possible to visualize the dead cell walls of cork, even without knowing what the image represented, exactly, and without relating living beings to a cellular composition.
In the beginning, the cell theory was elaborated by the scientist Robert Hooke, in the year 1665. Based on this research, the cell is a morphophysiological unit of all living beings, that is, it corresponds to the smallest unit of life.
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Select the correct answer from each drop-down menu. juan picks up a steel utensil and immediately drops it because it’s extremely hot. how does the reflex arc work to protect juan from a worse burn? in a reflex arc, the neuron carries the action potential from the .
The correct answer will be
1. Motor neuron
2. Spinal cord to muscle
In a Reflex arc, the Motor neuron carries the action potential from the Spinal cord to muscle.
The following are the components of a reflex arc:
A stimulus-detecting receptorA sensory neuron that will transmit the data to the spinal cord.A processing interneuron for the data (not present in all reflexes)A neuron that transmits signals to an effector organAn organ that carries out the reaction action.A brain circuit that manages a reflex is called a reflex arc. In vertebrates, the majority of sensory neurons synapse in the spinal cord rather than passing directly into the brain.
When Juan picks up a steel utensil the receptor detects the stimulus. A sensory neuron transmits the data to motor neuron which activates spinal cord which then signals the effector organ to carry out the reaction action i.e., Juan immediately drops the hot Utensil.
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Answer:
Thus us what you should see got it right on plato!
Explanation:
Besides drinking and cooking, in what other ways do you use water?
What is the founder effect?
A(when an individual is lonely
B(When individuals join a population and their genes merge into the pool.
C) When individuals become isolated from the
larger populations and the gene pool differs
from the original population over time
Answer:
What is founder effect
Explanation:
i think C)
Worldwide, what percentage of human water usage does industry account for? (Note: This relates to water usage now, not water supply.) What is the percentage in the United States?
Worldwide, 19% of human water usage does industry account for. While the percentage of United States withdrawals total of 5% of water usage for industrial purposes.
What percent of water is used in the United States for thermoelectric power?A total of 49% of water is used in the United States for thermoelectric power.
Apart from this, Industrial and manufacturing businesses also utilize about 12 percent of the public water supply in the United States.
Therefore, it is well described above.
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A woman with type a blood (genotype: ao) is married to a type b person (genotype: bo). What blood types will their children have?
The blood types of the children formed from a woman with type A blood (genotype: AO) is married to a type B person (genotype: BO) is:
ABAOBOOOHow to cross parents with specific genotype?According to this question, a woman with genotype AO is crossed with a man of genotype BO.
This means the following cross will be performed:
AO × BO
The offsprings of this cross will have the following genotype:
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What happens during prophase of meiosis I?
Answer:
Meiosis I, the first meiotic division, begins with prophase I. During prophase I, the complex of DNA and protein known as chromatin condenses to form chromosomes. The pairs of replicated chromosomes are known as sister chromatids, and they remain joined at a central point called the centromere.
Explanation:
Which of the following is the disadvantage of sexual reproduction?
A. Formation of new characteristics
B. Increased diversity of the species
C. More survival rates
D. Mate selection
Answer:
I think that it is mate selection though not sure
For which of the following problems would growing and maintaining cover crops be an appropriate solution? (3 points)
I. Erosion is thinning the soil on a farm.
II. The organic matter and nutrients in the soil on a farm are being depleted.
III. The soil on a farm is becoming arid due to decreased water-carrying capacity.
A. I and II only
B. I and III only
C. II and III only
D. I, II, and III
Cover crops are suitable for preventing erosion, evapotranspiration of water from soils, as well as prevent leaching of nutrients. The correct option is D.
Functions of cover cropsCover crops are grown primarily to protect the soil from the following:
water and wind erosionexcessive evaporation of watermineralization of nutrientsweed and pests.In addition, some cover crops are able to fix nitrogen into soils and serve as a source of green manure for the soil.
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In which situation would new technology be most likely to cause a change in an existing theory about new structures a cell?
The new technology makes it possible to detect and analyze a structure more rapidly.
The new technology allows scientists to confirm the presence of an existing structure in a cell.
The new technology makes it possible to produce additional structures that were not previously there.
The new technology allows detection of a structure that could not be detected previously.
The situation that the new technology be most likely to cause a change in an existing theory about new structures of a cell is the new technology allows detection of a structure that could not be detected previously.
What is a technology?Technology is the application of scientific knowledge for practical purposes. Technology is used in the advancement of the worlds. New technologies help to solve many problems that were impossible before.
Thus, the correct option is D.
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The new technology allows detection of a structure that could not be detected previously. Thus, the correct option is D.
What are the benefits of technology?
Sales will probably improve as a result of technology that makes it simpler for people to buy from you, including an e-commerce solution and numerous payment apps. Marketing departments are forced to adapt the social media platforms that your clients and potential customers use since they are born and die on a monthly basis.
The tasks that HR departments perform for hiring, reviewing applicants, onboarding, and training involve a significant amount of technology. The more HR duties you can complete using technology, the quicker they can be completed and the less likely it is that you will make a mistake that could result in a lost recruit, an employee leaving, or a lawsuit. Employee education on topics like benefit enrollment and corporate policies, for instance, guarantees appropriate paperwork is done and cuts down on training time for new hires.
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Black coat color is dominant over white coat color in guinea pigs. in addition to coat color, rough coat is dominant over smooth coat.
b. Demonstrate a cross between a heterozygous black/homozygous smooth and homozygous white/heterozygous rough. describe the phenotypes as fractions?
Answer:
Explanation:
C = dominant black coat
c = recessive white coat
T = dominant rough coat
t = recessive smooth coat
Heterozygous black coat + Homozygous smooth guinea pig genotype:
Cc tt
homozygous white/heterozygous rough:
cc Tt
Punnett Square
After looking at Punnett squares attached, we can see that 1/2 of offspring are either black or white and 1/2 of offspring are either rough or smooth.
Cc - black coat - 2/4 - 1/2
cc - white coat - 2/4 - 1/2
Tt - rough coat - 2/4 - 1/2
tt - smooth coat - 2/4 - 1/2
Polyploid speciation occurs through _________
a. inbreeding
b. species migration
c. rapid environmental change
d. errors during meiosis
What do you think the climate is like where this palm tree grows?
Awnser: Tropical zones
Explanation:Unsurprisingly, the researchers found that most types of palms are clustered in tropical zones. Most palms flourish in areas with mean annual temperatures between 64 and 82 degrees Fahrenheit, but a few hardy varieties don't mind damp, cold feet
The energy produced during photosynthesis can be stored in the form of ______. ADP proteins sugars fats
Answer:
The energy produced during photosynthesis can be stored in the form of ___sugars___.
Explanation:
Hope it Helps!!!
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 the muscle system respond to stimuli to produce motion. The skeletal 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 spinal cord.
What are Skeletal muscles?Skeletal muscles may be defined as the muscles that fasten to your bones and authorize you to achieve a broad range of activities and operations.
Skeletal muscles control the direct movement of a person's will and are hence referred to as voluntary movement. While the spinal cord is associated with both movements directly or indirectly. It is a prolonged, delicate tubelike network liable for holding incoming and outgoing messages through the brain to the rest body.
Therefore, it is well described above.
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Answer
skeletal & spinal cord
Explanation:
The nervous system and the muscle system respond to stimuli to produce motion. The movements of skeletal 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 spinal cord
Brad is swimming in the ocean on a hot sunny day. he finds the water to be much colder than the sand on the beach, even though the sun is warming them both. identify the reasons for brad’s observation. the water is colder than the sand because it requires more to change temperature. this is because the water has a higher than the sand.
Answer:
The sea has a higher specific heat capacity than the sand meaning it takes more energy to heat up. The sand has a lower SHC so it requires less energy to heat up therefore heats faster and Brad will observe the sand to be hotter than the sea
The sea has a higher specific heat capacity than the sand meaning it takes more energy to heat up.
What do you mean by specific heat capacity?The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
In thermodynamics, the specific heat capacity of a substance is the heat capacity of a sample of the substance divided by the mass of the sample, also sometimes referred to as massic heat capacity.
For liquid at room temperature and pressure, the value of specific heat capacity (Cp) is approximately 4.2 J/g°C. This implies that it takes 4.2 joules of energy to raise 1 gram of water by 1 degree Celsius.
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What is the hypothesis? What educated guess are the scientists making?
Please help with this question about the beet root extract
An assumption or concept is given as a hypothesis for the purpose of debating it and testing if it might be true.
What is a hypothesis in a scientific way?In the scientific process, the hypothesis is developed before any pertinent research—aside from a basic background review—has been conducted. You pose a question, research previous studies, and then formulate a hypothesis.
A hypothesis is typically a speculative assertion made solely with the intention of being tested.
In contrast, a theory is a principle that has been developed in an effort to explain phenomena that have previously been supported by evidence. It appears in the titles of several scientifically recognized principles, including big bang theory.
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What makes a vertebrate chordate different from an invertebrate chordate?
Vertebrate chordates differ from invertebrate chordates by the presence of the vertebral column.
Vertebrate vs invertebrate chordatesChordates are of two groups - vertebrates and invertebrates.
The vertebrate chordates have vertebral columns which developed from the notochord.
The invertebrate chordates, even though possess notochords at some points in their life, do not have vertebral columns.
Vertebrate chordates include fishes, birds, reptiles, and mammals. Invertebrate chordates include the tunicates and the lancelets.
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Root hair cells absorb MINERALS from the soil by the process of…
Answer:
oot hair cells
Plants absorb water from the soil by osmosis. They absorb mineral ions by active transport, against the concentration gradient.
Explanation:
✓
What is the circulatory system?
A) Temperature Regulator
B) Transport System
C) Immune System Booster
D) Heater
Answer:
It has to do with the body. So, B
Explanation:
Answer:
B transport system.
Explanation:
The circulatory system, circulates (carries) blood around the body.
What happens when the body fails to take up excess glucose from the blood a. The excess glucose binds to working proteins, rendering them nonfunctional. b. The excess glucose is metabolized to produce energy for physical activities. c. The excess glucose retains water in the body to prevent dehydration. d. The excess glucose from the blood gets stored in the adipocytes. e. The excess glucose gets converted into useful alcohols.
Explanation:The excess glucose gets converted into useful alcohols.
When the body is unable to take up excess glucose from the blood then at time the fats from the blood gets stored in fats storing cells called as adipocytes. The excess glucose gets converted into useful alcohols. Last option is correct.
What are adipocytes ?These are the cells that store fats in the human body are called as adipocytes. These are the main energy storing cells.
The excess glucose gets converted into useful alcohols.
At this situation glucose is provided by the the carbohydrates where the glucose is the stored compound in the form of glycogen.
Therefore, the excess glucose is stored in the form of useful alcohols.
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Diffusion does not require any energy.
How does diffusion work?
A. Particles move from areas of higher concentration to
areas of lower concentration.
B. Molecules are moving AGAINST a concentration
gradient.
C. Heat is released making molecules move more quickly.
D. Cells only use energy to move substances across the
membrane.
A - Read below
Diffusion is simply particles spreading around. Think of it like spraying perfume in a room. Where the person sprayed the perfume would be a high concentration as there is a lot of that perfume there. However, on the other side of the room there would be little to no perfume. So the perfume spreads around until it is evenly distributed in the room.
Which is the best example of a question that could be used to develop a testable hypothesis?
O Does altitude affect how food tastes?
O What is the best brand of window cleaner?
O What is the effect of unfiltered water on plant growth?
O Does temperature affect human emotion?
Answer:
What is the effect of unfiltered water on plant growth?
Explanation:
What material is too important to ever
leave the nucleus?
A. DNA
C. Ribosomes
B. Protein
D. Mitochondria
Answer:
A. DNA
(out of all the options, the DNA molecules must never leave the nucleus)
Correct option:
What is D.N.A.?Discoverer: Friedrich Miescher
Date of Invention: 1869
'DNA' is usually defined as: deoxyribonucleic acid: an extremely long macromolecule that is the main component of chromosomes and is the material that transfers genetic characteristics in all life forms, constructed of two nucleotide strands coiled around each other in a ladderlike arrangement with the sidepieces composed of alternating phosphate and deoxyribose units and the rungs composed of the purine and pyrimidine bases adenine, guanin, cytosine, and thymine: the genetic information of the DNA is encoded in the sequence of the bases and is transcribed as the strands unwind and replicate.
Other options:
What are ribosomes?A cell organelle constructed in the nucleolus and functioning as the site of protein synthesis in the cytoplasm; consists of rRNA and protein molecules, which make up two subunits.
What is protein?Any of the numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the diet of all animals and other nonphotosynthesizing organisms, composed of 20 or more amino acids linked in a genetically controlled linear sequence into one more polypeptide chains, the final shape and other properties of each protein being determined by the side chains of the amino acids and their chemical attachments: proteins include such specialized form of collagen for supportive tissue, hemoglobin for transport, antibodies for immune defense, and enzymes for metabolism.
What is the mitochondria?An organelle in the cytoplasm of cells that function in energy production.
The "powerhouse" of a cell.
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Place the following in order of blood flow back to the heart.
- heart
- capillaries
- veins
- superior and inferior vena cava
Failure of the mitochondria to generate ATP will most significantly affect the ______ slow oxidative fast glycolytic fast oxidative-glycolytic skeletal muscle fiber type and therefore cause quicker muscle fatigue.
Failure of the mitochondria to generate ATP will most significantly affect the fast oxidative-glycolytic skeletal muscle fiber type and therefore cause quicker muscle fatigue.
What is mitochondria?Mitochondria is the cell organelle that is known as the power house of the cell. This is so because it uses aerobic respiration to generate the Adenosine triphosphate.
The Adenosine triphosphate. is then used by the cell as chemical energy to power some of its activities such as skeletal contractions.
Fast oxidative-glycolytic skeletal muscle fiber is a type of muscle that uses aerobic respiration to generate ATP.
Therefore, Failure of the mitochondria to generate ATP will most significantly affect the fast oxidative-glycolytic skeletal muscle fiber type and therefore cause quicker muscle fatigue.
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Microbial control methods usually target any of the following cellular components except which one?.
Microbial control methods usually target any of the following cellular components except the mitochondria. option D
What are microbial control methods?Microbial control methods are methods aimed at the causation of ineffectiveness of microorganisms.
They could be physical or chemical methods.
Some microbial control methods include high or low temperature, drying, osmotic pressure, filtration, radiation, etc.
These methods target cell components that are not found in humans.
Therefore, microbial control methods usually target any of the following cellular components except the mitochondria
The options are
a. plasma membrane permeability
b. nucleic acids
c. microbial proteins
d. mitochondria
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A permanent change in the DNA sequence of a gene
Answer:
A mutation.
Explanation: When a cell mutates is will be permanently changed.
Which is required for both anaerobic respiration and aerobic respiration?
O oxygen
O water
• mitochondria
glucose
Answer:
glucose
Explanation:
glucose is the starting material or precursor for both aerobic and anaerobic respiration. Only the products and pathways are different.
Answer:
glucose
Explanation:
took the test
The cost of renewable energies has increased over the last decade
A. true
B. False
Really need help on this asap pleasee!
giving out 15 points out for this :)