The best resolution that can be achieved with light microscopes is; 200nm
What is the resolution of the microscope?The light microscope is also called optical microscope and it is a type of microscope that primarily uses visible light and a system of lenses to produce magnified images of smaller objects.
The best resolution that can be achieved with light microscopes is about 0.2 microns or 200nm because the maximum useful magnification it can provide is approximately 1,000x.
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What type of blood vessel carries
oxygen-poor blood back to the
heart?
Answer:
veins
Explanation:
Veins carry oxygen-poor (deoxygenated) blood back to the heart, whereas arteries carry oxygen-rich blood away from the heart.
Explanation:
as blood travels through the body, oxygen is used upand the blood become oxygen poor. oxygen-poor blood returns from the body to the heart through Superior vena cava and inferior vena cava, the two main veins that Bring blood back to the heart. this is my answerWhich of the following questions could best be explored using a scientific investigation?
An empirical scientific question is one that focuses on things, creatures, or occurrences in our immediate environment. By examining quantifiable data and supporting evidence, it can be resolved by experimentation, observation, or other data collection methods.
These questions are appropriate scientific questions and can be tested using the scientific method:
a) The color of Handragea flowers can be studied by growing it in different soils with different pH values and the result can be noted.
b) The properties of soil affecting color of flowers can be studied by growing the flowers in different types of soils like clay, sand, nutrient rich, nutrient deficient, silt, etc.
e) If the grass requires fertilizer one set of grass can be grown without fertilizer while one set can be grown with fertilizer to check the query.
There are limitations to the scientific process. Only quantitative data from observable, quantifiable, and repeatable experiments can it provide objective answers to questions. It is unable to respond to introspective queries based on qualitative judgments or beliefs hence, other options will be incorrect.
Hence, The following questions are considered appropriate scientific questions that can be tested using the scientific method.
a. Does the pH of the soil affect the color of hydrangea flowers?
b. What properties of the soil influence the color of hydrangea flowers?
e. Does grass require fertilizer in order to grow?
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Answer:
The answer is how many seeds are in an apple
Explanation:
Which represents the cross between parent plants if one is heterozygous and has yellow-colored pods and the other is homozygous and has green-colored pods?.
The cross between parent plants if one is heterozygous for yellow pods and the other is homzygous for green pods - Yy yy., i.e., option A.
What is heterozygous?The occurrence of different types of alleles is referred to as heterozygous condition.
A heterozygous genotype may consist of one normal allele and one mutated allele, or two distinct mutated alleles.
The missing options of the question are:
Yy ´ yyYY ´ yyYy ´ Yyyy ´ yyThe cross between parent plants if one is heterozygous for yellow pods and the other is homzygous for green pods - Yy yy.
Thus, the correct option is A.
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Answer: Yy’ yy
Explanation:
because I said so
Carbon fixation occurs in the second stage of photosynthesis, during the light-independent reactions of the Calvin cycle. In the first step of this cycle, the enzyme Rubisco adds CO2 to the energy-rich compound ribulose 1,5-bisphosphate, ultimately producing two molecules of 3-phosphoglycerate. In a culture of green alga that is carrying out photosynthesis in the presence of CO2 in the laboratory, what would happen to the levels of ribulose 1,5-bisphosphate and 3-phosphoglycerate in the minutes after the lights were turned off and the cultures were plunged into darkness
Ribulose 1,5-biphosphate will be depleted while 3-phosphoglycerate will accumulate.
Carbon fixationThe first step of the carbon fixation during which Rubisco adds CO2 to Ribulose 1,5-biphosphate to produce 2 molecules of 3-phosphoglycerate requires energy molecules from the light reaction.
In the subsequent steps, Ribulose 1,5-biphosphate is regenerated in a step that requires energy molecules from the light reaction.
Thus, in the first few minutes of turning off the light, the available energy molecule from the light reaction will be used up to produce 3-phosphoglycerate. However, the regeneration of Ribulose 1,5-biphosphate will become impossible.
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the diaphragm is innervated by the __________ nerve, which allows it to contract.
The diaphragm is innervated by the phrenic nerve, which allows it to contract.
What is phrenic nerve?The C3-C5 spinal nerves, which are parts of the cervical plexus, give rise to the phrenic nerve, a mixed nerve. It begins in the neck and travels through the thorax vertically before terminating on the diaphragm.
The phrenic nerve is bilateral, there are some significant distinctions between the left and right counterparts in terms of its courses and interactions with surrounding structures.
The primary purpose of the phrenic nerve, which makes it an essential part of the physiology of breathing, is to deliver the full motor innervation to the diaphragm.
Diaphragm is controlled by the phrenic nerve (the large dome-shaped muscle between abdominal and chest cavities). It is necessary for breathing. Diaphragm contracts as a result of signals sent by nerve (become thicker and flatter). This motion makes room for lungs to expand and take in air (inhalation).
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generally speaking, fossils can form when organisms choose one: a. travel over gravels and leave imprints. b. are preserved in recrystallized limestone called marble.
Fossils can form when organisms travel over gravels and leave imprints.
How fossil can formed?Fossils are formed when a living organism i.e. plant or animal dies and quickly buried by sediment. When burred into the soil they leave their imprint on the surrounding environment.
So we can conclude that fossils can form when organisms travel over gravels and leave imprints.
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Write a short description of the life cycle of a flowering plan
Answer:
Flowering plants begin as seeds. These seeds store energy and food within them long enough to reach the right environment and germinate. Germination is the development of a plant, growing from a seed into a seedling. Seedlings are the second stage of a flowering plant's life. This is when their roots begin to form and photosynthesis can begin. Next comes the growth period. After the seedling is planted, it requires a lot of food and energy as more leaves begin to emerge. The next stage of a flowering plant's life is the flowering stage itself. This is when buds and flowers begin to sprout. It enters the reproductive stage and pollination begins, allowing more seeds to be sown.
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)
Reviewing Meiosis:
1. How many cells are present and how many chromosomes are present in the cell at each stage?
start of Meiosis____
end of Meiosis 1_____
end of Meiosis 2____
Start of Meiosis = 1 cell 1 pair of chromosomes
End of Meiosis 1 = 2 cells crossed over chromosome (combined genes 1 in each cell = 2)
End of Meiosis 2 = 4 cells, 1 chromatid in each (4)
I hope it helps!
on area is 10m * 10m and 6 quadrants of 0.5 * 0.5m where set randomly and counted six five four three two and one grass respectively how many grasses would be found in the whole area
what is the significance of diffusion and osmosis in living organism ?give one example in support of your answer
Answer:
Plants use this to absorb water from the soil to the roots. Osmosis is important to plants because it allows for water uptake, photosynthesis and general stability.
Osmosis ensures that all cells and structures within a plant have correct water pressure and volume.
In animals, osmosis helps to absorb water from the intestines to the blood.
Explanation:
just Mark me brailinist
Fig. 6.1 shows four species of myriapod, not drawn to the same scale.
Polydesmus
denticulatus
1
Fig. 6.1
(a) State three features of all myriapods that are visible
Answer:
Many pairs of legs.Two body sections (head and trunk)One pair of antennae on the head.What makes plants wilt?
C. a lack of stability that would usually come from the
ribosomes
A. a lack of turgor pressure that would usually come
from water stored in the central vacuole
B. a lack of motility that would usually come from the
nucleus
Answer:
A
Explanation:
Due to the hot weather the plants moisture start to decrease until they wilt.
Answer: a lack of turgor pressure that would usually come from water stored in the central vacuole
Explanation: Dehydration.
how do the human nervous and endorcrine systems work together
The endocrine system, along with the nervous system, coordinates the body's functions to maintain homeostasis during rest and exercise. The nervous and endocrine systems also collaborate to initiate and control movement, as well as all of the physiological processes that movement entails.
What is endocrine system?The endocrine system is a web of glands and organs. It controls and coordinates your body's metabolism, energy level, reproduction, growth and development, and response to injury, stress, and mood using hormones.
The endocrine system, along with the nervous system, coordinates the body's functions to maintain homeostasis during rest and exercise.
The nervous and endocrine systems also collaborate to initiate and control movement, as well as all of the physiological processes that movement entails.
Thus, the nervous and endocrine systems work together to carry out the coordination of the body.
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D adhesion and cohesion of wale
24. Choose the correct statement that will make the following sentence true. "If a plant cell is put into a solution with a
very high concentration of solute,....
A water will leave the vacuole.
B
the cell will be turgid (the vacuole will be filled with water).
C the cell membrane will be held out by the pressure of water against the cell wall.
D. water will no longer enter the cell.
Answer:
water will leave the vacuole
Hello can someone help me please and thank:)
Answer:
B- J, L, K
Explanation:
Wrong Subject but the largest side's opposite angle is the largest if that made sense. For example, KL which is the largest side corresponds to the largest angle <J.
Using complete sentences, explain how large-scale agriculture leads to increased atmospheric co2.
Large-scale agriculture will definitely lead to increased atmospheric carbon dioxide. This is due to the attribute that the amount of oxygen released by agricultural plants increases and filters the air that contains toxic gases like carbon monoxide and vamoosing it with CO2.
What is Atmospheric CO2?Atmospheric CO2 may be defined as the amount and quantity of carbon dioxide that is generally present in the atmosphere by the activity of burning fossil fuels, automobile emissions, etc.
It is true that large-scale agricultural activities purify the atmosphere by eliminating all poisonous gases like CO, SO2, etc. This activity is generally performed by the overproduction of carbon dioxide through agricultural plants.
Therefore, it is well described above.
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The "collar bone" is also known as the:
According to the research, the collar bone is also known as the clavicle.
What is the clavicle?They are the bones of the human being that are found in the upper sector of the chest, articulating with the acromion of the shoulder blade and the sternum.
This bone is important for the composition of the shoulder joint complex, since it functions as a stabilizer for all parts of the shoulder, and therefore for the arm.
Therefore, we can conclude that according to the research, the collar bone is also known as the clavicle.
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Answer:
clavicle
Explanation:
hope this helps :)
Match the following. Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. ResetHelp 1. : Chemical or mechanical process of breaking down foodstuffs into simpler units. 2. : Wavelike smooth muscle contractions that move foodstuffs through the alimentary tube. 3. : Enzymatic breakdown of any type of food molecule. 4. : Process by which simpler chemical units pass through the lumen of the gastrointestinal tract into the blood or lymph.
Matching the following words to the appropriate blanks
Digestion is Chemical or mechanical process of breaking down foodstuffs into simpler units Peristalsis is Wavelike smooth muscle contractions that move foodstuffs through the alimentary tube Hydrolysis is Enzymatic breakdown of any type of food molecule Absorption is process by which simpler chemical units pass through the lumen of the gastrointestinal tract into the blood or lymph Processes of the digestive systemThe terms associated with the sentences listed are the various processes of the digestive system and they are Digestion ( a process of breaking down consumed food into simpler units for absorption ), Peristalsis, hydrolysis and Absorption which is the last phase of the digestive system.
During absorption the chemical units from the digested food passes through the lumen of the gastrointestinal tract into the blood where they are used by the body for the growth and daily activities of the body.
Hence we can conclude that the words matching the sentences are as listed above
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The missing words matched to the blanks
HydrolysisAbsorption DigestionPeristalsisAero in aerobic and anaerobic respiration stands for?
Owater.
Ohydrogen.
O carbon.
O oxygen.
Design a laboratory-based experiment to test the hypothesis that algae need light to grow.
The same algae is subjected to conditions in which one is exposed to light and another is not exposed to light while the nutrients in the both systems are kept the same.
What is algae growth?The growth of algae is the process by which the organism increases in size. Now we know that that the algae is photosynthetic hence light must be required for its growth.
In order to verify this, the same algae is subjected to conditions in which one is exposed to light and another is not exposed to light while the nutrients in the both systems are kept the same.
The results of this experiment must confirm that the algae exposed to light grows better than the algae that was not exposed to light.
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The smallest contractile unit within skeletal muscle would correspond to the distance between which two points in the figure?
The distance between 1 and 7 spans a sarcomere correspond the structure at B is covered by the perimysium.
What is the smallest contractile unit within skeletal muscle?A sarcomere comprises the segment between two consecutive Z lines and is the contractile unit of the muscle fiber, as it is the smallest portion of the muscle fiber capable of contraction and distension.
In this case, the distance between points 1 and 7 has the smallest structure of a skeletal muscle and corresponds to figure B.
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Explain what causes menkes syndrome include in your answer the symptoms and life expectancy of the affected person
Answer:
Menkes disease is caused by a defect in the ATP7A gene. The defect makes it hard for the body to properly distribute (transport) copper throughout the body. As a result, the brain and other parts of the body do not get enough copper, while it builds up in the small intestine and kidneys. Menkes syndrome causes impaired copper absorption. This results in changes in the arteries and deterioration of the brain. Menkes syndrome is rare. Most children born with Menkes syndrome have a life expectancy of < 4 years.
Explanation:
What phase of mitosis is shown in the
diagram below
Answer:
prophase
Explanation:
What is the analine blue stained structure in the sample?
The analine blue stained structure in the sample is called; Extracellular tissue
What is the component of the biological structure?From online sources, the analine blue stained structure is a stringy mass beneath the intestinal epithelium that extends into the villi.
Now, Aniline blue binds to extracellular structures such as the fibers in the lamina propria which is the name of the connective tissue beneath the intestinal epithelium.
Finally, the analine blue stained structure is called Extracellular tissue.
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The people represented by the Denisova fossils likely Group of answer choices were isolated to the point of extinction. looked very much like Neandertals. share a common ancestor with Neandertals. interbred with Homo erectus.
The people represented by the Denisova fossils likely share a common ancestor with Neandertals. The correct option is c.
What are Denisova fossils?So far, there is little physical evidence of the Denisovans' existence. A finger bone, teeth, and skull fragment from a Siberian cave, as well as a lower jawbone from a Chinese cave on the Tibetan plateau, have been discovered so far.
The people represented by the Denisova fossils likely share a common ancestor with Neandertals.
Thus, the correct option is c.
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+
C
What will most likely increase if there is a high death rate?
Answer: would be emigration
Explanation: When the death rate shoots up in a particular environment due to certain factors organisms are bound to emigrate away for such environment to avoid death from reaching them
A red blood cell has been placed into three different solutions. One solution is isotonic to the cell, one solution is hypotonic to the cell, and one solution is hypertonic to the cell. Determine which type of solution is in each beaker based on the cell's reaction. Drag each item to the appropriate bin.
The type of solution in each beaker based on cell's reaction are :
Isotonic solution : Normal reactionHypotonic solution : The cell becomes turgidHypertonic solution : The cell becomes deformedMatching each solution to the cell reaction
When the red blood cell is placed in an isotonic solution the solvent flows in and out of the blood cell at the same rate, when the cell is placed in a hypotonic solution the solvent flows into the cell at a faster rate causing the cell to swell ( becomes turgid ) also when the cell is placed in a hypertonic reaction the cell becomes deformed becomes it loses more water than it absorbs.
Hence we can conclude that The type of solution in each beaker based on cell's reaction are : Isotonic solution : Normal reaction, Hypotonic solution : The cell becomes turgid, Hypertonic solution : The cell becomes deformed
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What format is typically followed with
a hypothesis?
A. a long explanation
B. a question
C. if, then statement
Wang
Answer:
C.
Explanation:
A hypothesis is always in the form of an if, then statement.
which human evolutionary theory is supported by analysis of maternal inheritance through analyzing mitochondrial dna?
The human evolutionary theory is supported by analysis of maternal inheritance through analyzing mitochondrial dna is; Recent African Origin Theory.
What is human evolution theory?Human evolution theory is simply defined as the lengthy process of change by which people originated from apelike ancestors.
Now, the correct answer to the question will be "Recent African Origin Theory". This is because the "recent African origin" model proposes that all modern non-African populations are substantially descended from populations of Homo sapiens that left Africa after that time.
The description above corresponds with the idea that analysis of maternal inheritance is done through analyzing mitochondrial dna.
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