Answers
Answer:
D. phase-contrast microscopy
Explanation:
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For a specimen of an active motile microorganism, the most effective microscope for visualization would be the phase contrast microscope.
The phase contrast microscopy is a technique designed to make images of live, colorless, and transparent microbes visible by enhancing the contrast. Most light microscope requires that microbes are killed and stained before they can be visible. The phase contrast technique uses optical mechanism such that any slight variation in the phase of the organism leads to a change in amplitude and can be seen in the contrast of its image under the microscope.In summary, the phase contrast microscope would be the most effective microscope to use when a live microbe specimen is in question due to the fact that it would use a phase change to create an enhanced image without having to kill or stain the microbe.
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Related Questions
he reflexes from sense organs in the head are co-ordinated by the brain.
Name a sense organ involved in a reflex co-ordinated by the spinal cord.
Answers
Answer:
sense of touch
Explanation:
There are five sense organs that involved vision, hearing, taste, smelling, and touch.
Sense of touch is involved in a reflex coordinated by the spinal cord as when we touch something, sensory nerves sends the information to the brain and spinal cord. the motor nerves process the signals in the brain and send it back to the muscles, that leads to contraction reflexively.
Hence, the correct answer is "sense of touch".
Fats and oils are rich in nonpolar covalent bonds, specifically C-C bonds and C-H bonds. What is the consequence?
Answers
Answer:
they become insoluble in water.
Explanation:
The many C-C and C-H bonds make fats nonpolar and insoluble in water.
The consequence is they become insoluble in water. The correct option is D.
What are fats and oils?One of the three macronutrients is fat and oil (the other two are protein and carbohydrates).
However, fats and oils differ from one another in that fats are primarily derived from animal sources, whilst oils are primarily derived from plant sources.
Because fatty acids are amphipathic, they have polar and nonpolar ends on opposite sides of their molecular structure.
Fat molecules known as monounsaturated fats have only one unsaturated carbon link (also called a double bond). Similar to olive oil, oils containing these fat molecules are liquid at room temperature and start to solidify when it becomes cold.
Therefore, the correct option is D. they become insoluble in water.
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The question is incomplete. Your most probably complete question is given below:
They become hydrophilic
They are able to form bilayer membranes
they become soluble in water
they become insoluble in water
HELP ANSWER QUICK!!!!
A scientist examines the legs of two different species. Due to similarities in the bone arrangement, the scientist concludes that the
leg structures of the two species are homologous.
What can the scientist conclude about these species?
ОА.
The two species evolved from a common ancestor.
OB
The two species are evolutionarily unrelated.
O C.
The two species have identical DNA.
O D.
The two species are found in the same ecosystem.
Answers
Answer:
A this is the definition of homologous
D would analogous
Explanation:
Indicate the expected number of Barr bodies in interphase cells of individuals with Klinefelter syndrome; Turner syndrome; and karyotypes 47,XYY, 47,XXX, and 48,XXXX.
Answers
Answer:
Barr bodies are small bodies that are dark staining bodies that show the inactivated X chromosome, these sex chromatin bodies attach to the membrane of the nucleus of interphase cells.
One less of the total number of X-chromosome (n-1) represents the number of Barr bodies.
Then,
The number of Barr bodies with Klinefelter would be:
Klinefelter (47,XXY): (n-1) = (2-1) = 1 Barr body as here two X chromosome present.
Similarly, for
Turner (45,XO): (n-1) = (1-1) = 0 Barr bodies (X chromosome = 1)
Now, as per the question, the bar bodies for karyotypes given
47,XYY: (n-1) = (1-1) = 0 Barr bodies
47,XXX: (n-1) = (3-1) = 2 Barr bodies
48,XXXX: (n-1) = (4-1) = 3 Barr bodies
Need help with this one
Answers
Answer:
Hey sorry but I also need this answer
Explanation:
please let me know if you get it !
Let me know, this question is 13 points.
Answers
I need help with Human Anatomy/Physiology I just need help with the explanations please. :)
Answers
Answer:
The arm is a great example. The muscle would be the biceps brachii and the bones of the shoulder and the arm. The biceps brachii allows you to do flexion -- bringing your forearm closer to your shoulder and Extenion -- extending your arm outward so that it is fully straight.
This looks like a project and will take a lot of time so I provided a starting place to look into.
Explanation:
Answer:
I will explain down below.
Explanation:
So basically if I am correct you are supposed to do a project based off of the skeletal muscle system. You want to, get a piece of paper or a poster and draw a representation on it, then describe what each of the terms are. I am not 100% sure, but I did a project like this before in the past.
DNA polymerase is the enzyme responsible for
a. joining Okazaki fragments
b. reading the RNA codes for proteins
c. forming new copies of DNA
d. breaking the double helix by disrupting the hydrogen bonds
Answers
Salmon live in both fresh water and salt water during their lives. They are born in in fresh water but migrate out to marine waters for most of their life. Eventually, they return to the place they were born in fresh water to spawn. Changing between fresh water and salt water affects the balance of water in their body. Salmon have an internal control system called osmoregulation that restores the balance by negative feedback. This is an example of which characteristic of life
Answers
Answer: The question is incomplete because the options are not given. Here are the options gotten from another website.
A. adaptation
B. reproduction and development
C. response to the environment D. energy transformation
E. maintaining homeostasis
The correct option is maintain homeostasis which is C.
Explanation:
This is because salmon posseses adaptive physical characteristics that help it to suitably live both in freshwater and salt water. This is because homeostasis is the ability to resist any change in order to maintain body internal environment and this is a negative loop feedback. Organs of salmon work to control homeostasis but endocrine and nervous system engage more in maintain homeostasis.
The last option is correct.
The following information should be considered:
This is due to the sal-mon possessing adaptive physical characteristics that help it to suitably live both in fresh-water and salt-water. This epresent the ability to resist any salt-water in order to maintain body internal environment.Learn more: https://brainly.com/question/1979431?referrer=searchResults
The ______ function of the nervous system is to gather ______ information and make decisions that affect ______ functions.
motor; integrative; sensory
motor; sensory; integrative
integrative; sensory; motor
Answers
Explanation:
integrative; sensory; motor
hope it helps!
Aaminah saw a sparrow eating a caterpillar. She also noticed that the mango tree in her garden was covered in caterpillars. A food chain linking these organisms is: *
choose one of these
Caterpillars -> Mango tree -> Sparrow
Mango tree -> Caterpillar -> Sparrow
Mango tree -> Sparrow -> Caterpillar
Sparrow -> Caterpillar -> Mango tree
Answers
The first level in a food chain should be a primary producer which is the mango tree.
The second level in a food chain should be Primary consumer which is the caterpillar.
The third level in a food chain should be the secondary consumer which is the sparrow.
A food chain always starts from left to right. This from the primary producer then to the other levels.
Mango tree > Caterpillar > Sparrow
The first level in a food chain should be a primary producer which is the mango tree.
The second level in a food chain should be Primary consumer which is the caterpillar.
The third level in a food chain should be the secondary consumer which is the sparrow.
A food chain always starts from left to right. This from the primary producer then to the other levels. np
Why would global warming have an effect on sea levels?
Answers
Answer:
ice caps melting would cause more water leading to higher sea levels
1. Direction: Choose and write the letter of the correct answer on the space provides
16. Veich is used for sing four?
a. eggbeater
b. four sier
o .spettal
17. Which is include a inte and chopping board.
a puting tools b. pastry blender c. peeler
d. strainer
18. Which is used to separate the firer particles from the coarser particles of ingredients?
a grate
c.sk
19. Which is a unit of weight and measure which is equivalent to 1 pound?
a. 16 ounces
b. 1pint
d. 1 gallon
20. Which measurement to serve as your substitute for honey?
a.2 T. four
b. 3 T. cocoa + 1 T. fat
c. 12 T. comstarch
d.1%C. sugar + % C. water
21. Which is used ble
el ingredients when measuring dry or solid ingredients?
b. spoon
c. spatula
22. Which is not to be done with the cup when measuring liquid ingredients?
an the cup b. pack the cup c. shake the cup
d. tap the cup
23. Which is used for cuting bread?
2. butler knite
b. chefs Knie
c. paring knife d. serrated knife
24. Which is used for draining liquid from can fruits and vegetable?
2. colander
b. four sifter
c. pastry cloth d. strainer
25. Which is a product can be made by mixing lemon juice, baking soda and vinegar?
a baking soda
b. borax
c. cleaning paste d. tea tree oil
26. Which is used to sterilize tools and equipment?
a. boing water
b. cold water
c. distilled water d. warm water
27. Which term used to describe something that has a potential to cause harm?
b. airbome
c. hazard
d. risk
Answers
Answer:
its a test its a test
Explanation:
Is this a test is this a tetstis this a test is ti
what level of an organism is the stomach?
Answers
Answer:
The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism.
A STOMACHE IS AN ORGAN!!!!
An organ is a collection of tissues that structurally form a functional unit specialized to perform a particular function.
_____________________________________[tex]\Huge\text{Levels of Biological Organization}[/tex]Cell - The smallest unit of life. Example: Red Blood Cell Tissue - A group of similar cells that perform a specific function. Example: Muscle Tissue Organ - A structure within an organism usually composed of several tissue types that form a functional unit. Example: Stomach Organ System - Two or more organs working together in the execution of a specific bodily function. Example: Respiratory System Multicellular Organism - An individual living thing. Example: A single H.o.m.o Sapiens(Human Being). Species - Very similar, potentially interbreeding organism. Example: All cats, dogs, humans. Population - Members of one species inhabiting the same area. Example: Population of people living in USA Community - Two or more populations of different species living and interacting in the same area. Example: Cats and Hooomans living together in the same area or house. Ecosystem - A community together with its non-living surroundings. Example: Pond Ecosystem Biosphere - Different Ecosystems altogether makes Biosphere. Example: Planet Earth is biosphere_____________________________________Best Regards,'Borz'Can earthquake sensors detect tsunamis
Answers
What part of the chloroplast helps to absorb light in order for the plant to make its own food? Question 10 options: chlorophyll stomata guard cells photosynthotons
Answers
Answer: A please tell me if im right
Explanation:
Answer:
chlorophyll
Explanation:
hope i helped
List in order the various fluid compartments that a glucose molecule would encounter beginning with absorption from the lumen of the intestine and ending with the glucose molecule entering a skeletal muscle cell.
Answers
Answer:
The correct list of compartments glucose enter is :
The lumen > plasma (extracellular fluid) > interstitial fluid (extracellular fluid) > the skeletal muscle cell (intracellular fluid)
Explanation:
The glucose molecule would start from the lumen of the intestine where is absorbed. The glucose enters the plasma a part of the circulatory system known as extracellular fluid.
The glucose also encounters another type of extracellular fluid the interstitial fluid that is not in the circulatory system. At the last glucose as it is entering the skeletal muscle cell the last fluid compartment, which is intracellular fluid. This fluid is inside the cells.
Skeletal muscles are the elongated and elastic cells and fibers also known as the sarcolemma that have numerous nuclei in the periphery of their cells. They are majorly found in the diaphragm, throat, eyes etc.
The correct order of the compartments in which the glucose enters is lumen, plasma (extracellular fluid), interstitial fluid and the skeletal muscle cell.
How does the glucose flow from the digestive system to the muscles?Glucose is derived from the food and the nutrient molecule an organism intakes that reaches the lumen present in the intestine of the digestive system.In the lumen, the glucose molecules get absorbed and then enters the plasma that is the part of the circulatory system, which is also an extracellular fluid.In the plasma, the glucose also encounters the other extracellular fluids and then enters the skeletal muscle cells for providing energy which is the last fluid compartment and are intracellular fluid.Thus, the glucose enters the lumen, plasma, interstitial fluid and skeletal muscle cells.
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How can natural selection account for the long tongues of butterflies?
Answers
Whích scenario describes a relationship of parasitism?
O A polar bear catches a seal for dinner.
O Birds feed off the insects that are stirred up from the grasses as cattle move through.
O A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.
O Oxpecker birds eat parasitic ticks off the backs of zebras.
Answers
Answer:
C
Explanation:
C is the only one with something that is harming the animal but benefiting the parasite. A also seems like that, but it isn't parasitism.
Answer:
A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.
Explanation:
I took the test
which piece of equipment will be the best for measuring 75 mL of liquid?
A.) 250 mL Breaker
B.) 100 mL Graduated Cylinder
C.) 400 mL Overflow cup
Answers
Answer:
The correct answer is 25 mL graduated cylinder (it should be used in all the cases)
Explanation:
Hope this helps
From,
1kvibing
The BEST piece of equipment for measuring 75 mL of liquid will be a 100 mL Graduated Cylinder (Option B).
In a laboratory, beakers, flasks, and graduated cylinders are instruments that can contain a liquid.From the options above, a 100 mL Graduated Cylinder is the most similar amount of liquid and therefore it will have the most accurate measure.In conclusion, the BEST piece of equipment for measuring 75 mL of liquid will be a 100 mL Graduated Cylinder (Option B).
Learn more in:
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Question 6 of 20:
Select the best answer for the question.
6. Which of the following is a benefit of intensive farming?
O A. Animals raised in intensive farms are healthier.
O B. There are nearly one million types of intensive farms in the US.
O C. A concentrated animal feeding operation is the smallest type of intensive farm.
O D. The food produced on intensive farms is cheaper than that on open ranges.
O Mark for review (Will be highlighted on the review page)
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Answers
Explain: As more is produced it becomes cheaper, and less it becomes more expensive.
Why are most genes inhibited in an average animal cell
Answers
Answer:
Most genes must be turned off because cells play specific functions, thereby only a limited number of genes must be expressed in each cell type in order to produce proteins required in the cell
Explanation:
Gener regulation is a critical molecular mechanism required for normal cell functioning. In consequence, genes are turned on and off depending on the cell type. For example, in the brain, cells that will be differentiated into neurons will be expressed, while genes involved in the differentiation of undifferentiated myoblasts into muscle cells will be turned off. Thus, genes are switched off in order to produce only those specific proteins which are required for each cell during specific developmental programs and functions carried out by each cell type.
(For Science)
You arrive at the beach at 9:00 A.M. You lay a towel on the sand, and then you run 30 steps to reach the water’s edge. By 3:00 P.M., the water has almost reached your towel. What do you think happened?
halp
Answers
Answer:
The tide came in
Explanation:
Hope this helps!
Help please ???????
Answers
every cell in an organism has the same number of chromosomes except
Answers
Answer:
Neurons
Explanation:
What landforms can be found under the ocean?
Answers
What is this the definition of?
Reaction that disassembles polymers and absorbs water.
Answers
Answer:
Hydrolysis reactions use water to breakdown polymers into monomers and is the opposite of dehydration synthesis, which forms water when synthesizing a polymer from monomers. Hydrolysis reactions break bonds and release energy.
Match the following explanations with the appropriate reasons for cellular reproduction.
Answers
Answer:
Organisms get larger and develop into different stages of life >> Growth and development
Heal wounds, replace damaged cells >> Replace cells
Organisms make more of the species to keep them from going extinct >> Reproduction
Explanation:
Growth refers to the irreversible process by which organisms/tissues/cells increase in size and mass. Moreover, development can be defined as the progression from earlier to later maturation stages (e.g. fertilized ovule develops into a seed that will produce a mature tree). Cell replacement is a natural mechanism that occurs when cells become aged or in response to external/internal damage. During cell replacement, cells are produced from other cells by cell division. Finally, reproduction is a key biological process by which organisms (called parents) produce new genetically related organisms (i.e., offspring). According to the mode of transmission of genetic information, reproduction can be divided into sexual reproduction (offspring are different from parents) and asexual reproduction (offspring are the same as parents).
A model of a plant cell is shown.
Which of the structures are present in plant cells, but not in animal cells? Select all that apply.
Answers
The question is incomplete, however, the missing part of the question is as follows:
nucleus, chloroplast, Golgi apparatus, cell wall
Answer:
The correct answer is - cell wall and chloroplast.
Explanation:
Plant cells and animal cells both are eukaryotic cells and most of the cellular structures are the same, however, the plant cells have few adaptions that make them different from animal cells.
Plant cells have a cell wall outside of their plasma membrane that provides support and protects the cell from injuries. Cell wall not present in an animal cell. The other structure that presents in plant cells and not in animals is chloroplast that helps plants to produce their food by the process of photosynthesis.
Earth is made up of four systems: atmosphere, hydrosphere, geosphere, and blosphere. While each sphere covers a different
component of the planet, they are closely related to each other and interact often. An event in one sphere can cause dramatic
changes in another. Carbon is an element with a critical role in all four spheres. A student draws a model of the four spheres in
relation to the carbon cycle.
Carbon Cycle
Atmosphere
Cellular
respiration
Photosynthesis
CO2
V Hydrosphere
Biosphere
Energy
Ocean
Oil
Fossils
Geosphere
Shell
Which sphere, regarding carbon would be most immediately affected by a decrease in sunlight?
A Atmosphere
OB. Biosphere
O C. Geosphere
Answers
Answer:
A. Atmosphere
Explanation:
Atmosphere would be most immediately affected by a decrease in sunlight because sunlight is responsible for the photosynthesis in plants. if sunlight decreases, the photosynthesis reaction is also decreases in plants and less carbondioxide gas is used by the plant from atmosphere for making their food so we can say that atmosphere is greatly affected by the decrease in sunlight.