Answer:
The bright field microscope can be easily converted for use with dark field illumination using special dark field condensers (dry or oil immersion).
Explanation:
In a bright field microscope, the material appears unstained. The light passes directly and the details that are colored in a natural way are appreciated. In dark field microscopy, the contrast is created by a bright specimen on a dark background. Instead of illuminating the sample with a full cone of light (as in brightfield microscopy), a special condenser is intended to produce a disguise of the light rays by sending them laterally on the object in the form of a luminous cone, and this shape also does not penetrate the target directly. This form of illumination allows only oblique rays of light to hit the sample on the microscope stage and the image is formed with the light rays scattered by the sample and captured by the objective.
pancreatic amylase is a digestive enzyme that digests starch in the small intestine. pancreatic amylase's optimum pH is slightly basic, which the presence of NaHCO3 provides. indicate which test tubes (1-3) would show digestion of starch following incubation. Explain why the others would not.
Tube 1 = water, starch
Tube 2 = water, starch, pancreatic amylase, HCI
Tube 3 = water, starch, pancreatic amylase, NaHCO3
Answer:
Tube 3
Explanation:
Pancreatic amylase's optimum pH is basic, NaHCO3 is a base so it will provide the optimum pH for the enzyme to catalyse the breakdown of starch.
In tube 1 there will not be the breakdown of starch as there simply isn't any enzyme to break it down.
In Tube 2, the enzyme pancreatic amylase will most probably become denatured (loss of shape), as HCl is acidic which causes it to lose shape causing a change in the active site and will never be able to catalyse the breakdown of starch.
Hope this helps :)
Which factor does NOT change the size of population?
A. Aging
B. Birth
C. Death
D. Living
A. Aging
hope it helps you
What effect does the transfer of matter and energy have on organism and their
environment?
Answer:
In many environments, energy enters as daylight and is changed by makers into an organically usable type of issue through photosynthesis. That matter and energy at that point passes from one organic entity to another through food networks. Some energy is delivered from the framework as warmth.
sorry for the wait have a great day!
HELP! WILL GIVE BRAINLY!!!
What is RhoGAM? How does it work?
Answer:
RhoGAM is a medicine that stops your blood from making antibodies that attack Rh-positive blood cells. RhoGAM is a sterilized solution made from human blood that contains a very small amount of Rh-positive proteins. These proteins keep your immune system from making permanent antibodies to Rh-positive blood.
Answer:
Rhogam is human antibody to the Rh antigen. If any fetal blood cells escape into the maternal circulation, Rhogam binds to the Rh antigen and makes it “invisible” to the mother’s immune system. One dose at 28 weeks, and another at the time of delivery is enough to prevent the mother becoming sensitized.
Explanation:
which process divides the chromosomes in the cell before dividing?
A. mitosis only
B. meiosis only
C. both mitosis and meiosis
Answer:
option A says mitosis only
4
Select the correct answer.
Andrew, a highly mechanized farmer, has large acres of farmland. He wants to apply pesticides and fertilizers to all his crops spread across his
large land. What should Andrew use to spray pesticides and fertilizers on his land?
OA. trucks
OB. airplanes
Ос. .
harvesters
OD. planters
Reset
Next
Answer:
The correct answer is:
planters (D)
Explanation:
The key statement in the question is that Andrew wants to apply pesticides and fertilizers to all his crops across his large land. The most effective way of doing this is by using a planter to apply both the fertilizer and the pesticide as the planting occurs. This will ensure that the fertilizers and pesticides are applied directly to the crops and not scattered on the vast land.
which of the following cell types would have full complementary number of chromosomes?
a. haploid cell
b.somatic cell
c.gamete
d. sperm
1. Give 2 similarities between each of the skulls that might lead to the conclusion that these are all related.
2. What is the biggest change in skull anatomy that occurred from the dawn horse to the modern horse
Complete question:
You will find the image of the skulls in the attached files.
Answer:
1) 2 similarities between each of the skulls might be the presence of the nasal spine, and the interdental space.
2) The size of the skull seems to be the most noticeable change in skull anatomy between the dawn horse and the modern horse.
Explanation:
Each of the nasal bones in horses ends in a protuberance named "the nasal spine". These spines converge in the distal portion of the bone. These spines and the incisive bone delimitates the space called the naso-incisor notch. In the attached figure you will see the nasal bone in red and the nasal spines. This structure is present in all the skulls in the same position. The interdental space is the space left between the front teeth and the back teeth. It is useful to recognize a male from a female in modern horses. This space can be found in all the skulls. You will see it in blue in the image.The biggest change in skulls between the dawn horse and the modern horse is the size. The skull keeps the original shape or very similar shape but varies in length and height.
The two (2) similarities between each of the skulls that shows that they are all related include:
They all have a similar ridge that typically protrudes from the top.Each of the skulls have a set of flattened teeth.What is an evolution?Evolution can be defined as a process of gradual change in the characteristics and genetic make-up of the species of a living organism over several generations.
In Genetics, a scientific technique which is commonly used to determine evolutionary relationships between organisms is the study of their fossils and biochemical similarity.
The similarities between each of the skulls.Thus, the similarities between each of the skulls that shows that they are all related include:
They all have a similar ridge that typically protrudes from the top.Each of the skulls have a set of flattened teeth.All the skulls have the same overall shape.Additionally, the biggest change in skull anatomy with respect to the dawn horse and modern horse is that the modern horse has a larger skull.
Read more on evolution here: brainly.com/question/524043
How does soil composition affect the number and types of organisms an environment can support?
(Biome majors)
Answer:
The number of organisms an ecosystem can support depends on the resources available and abiotic factors, such as quantity of light and water, range of temperatures, and soil composition. Given adequate biotic and abiotic resources and no disease or predators, populations (including humans) increase at rapid rates.
During cellular respiration, your body breaks down glucose and releases
a.ATP.
b.oxygen.
c.hydrogen.
d.chlorophyll
Adult hyrdras are _________, meaning they do not move.
Body Temperature is maintained at through what type of energy?
Answer:
In the process of ATP production by cells throughout the body, approximately 60 percent of the energy produced is in the form of heat used to maintain body temperature.
Explanation: hope that helps
How do the size of the two atria compare to the ventricles
Answer:
Atria are the smaller upper chambers while ventricles are the larger lower chambers off the heart.
Explanation:
the main difference between them is that atria receives blood into the heart whereas ventricles pump blood outside the heart
When two oceanic plates collide, one plate may sink under the other as it is forced down into the mantle.
What landform is most likely to result from this movement of the plates?
A. mountain
B. fault
C. trench
D. rift valley
Answer:
c
Explanation:
i did the test *^*
What is a angiosperm?
Answer:
An angiosperm is a plant that produces flowers. The angiosperms, also identified as the flowering plants, belong to one of the vital groups of plants having seeds.
Explanation:
Answer:
A plant that produces seeds with protective covers
Explanation:
Can someone help me with just these three questions!
Answer:
Use the formula to answer
Explanation:
There is a formula that you should've taken note of that includes weight, velocity, and distance. The distance formula I believe.
HELP PLEASE ASAP
Ionic compounds are compounds that___?a) consist of only metallic element. B) have atoms that transfer electrons. C) exists as individual ions. D) all of the about
Answer:
D
Explanation:
I don't wanna write a full explanation sorry.
What reasoning correctly pairs a body system with its relationship to the digestive system?
Group of answer choices
excretory system; transports nutrients from the small intestine to other tissues
respiratory system; obtains oxygen so the energy in nutrients can be extracted
circulatory system; regulates and controls digestive functioning
nervous system; removes wastes from the blood
excretory system: removes waste from blood.
respiratory system: obtains oxygen so the energy in the nutrients can be extracted.
circulatory system: transports nutrients from small intestine to the othet tissues.
nervous system: regulates and controls digestive functioning.
( Am not completly sure, but i think this is the answer)
The Richter scale ranges from 1 to 10 in increments of tenths and measures the amount of energy released by an earthquake, not the amount of damage or the effect on people. How many earthquakes of magnitude 4.0 does it take to release the same amount of energy released by one earthquake of magnitude 8.0? (Show your work)
Which of the following is involved in the opening of stomata for the gas exchange of the plant?
Answer: Osmotic Pressure, lb/in2
Explanation:
Osmotic pressure is involved in the opening of stomata for the gas exchange of the plant.
What are stomata?In the epidermis of tree leaves and needles, there are cell structures called stomata that play a role in the exchange of water and carbon dioxide between plants and the atmosphere.
Transpiration and gas exchange is made possible by stomata. It is surrounded by two guard cells that regulate how the stomata open and close. Stomata open during the day for gaseous exchange and to release water vapour during transpiration. The stomata open and close in response to changes in the turgor pressure within the guard cell.
Hence, osmotic pressure is responsible for the opening and closing of stomata.
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What kind of bond is broken and reformed to release energy from food
molecules?
O A. Metallic
B. lonic
C. Hydrogen
D. Covalent
Answer:
a metallic
Explanation:
because I searched it up
Covalent bond is broken and reformed to release energy from food
molecules.
What is a chemical bond?It is the force of attraction between two atoms so that they can form a compound.It can be of many types.It can be either a covalent bond, ionic bond, coordinate bond etc. What is a covalent bond?It is a bond formed between two atoms when they share electrons in pairs.They can either share one, two or three pairs of electrons forming a single, double or a triple bond respectively.They are the strongest bonds in the living system."For getting energy from food these bonds are broken and reformed."To learn more about bonds, covalent bonds and food here,
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Reproductive cells in humans are also called
Answer:
They could be called Gametes as they are inside the reproductive cells.
Answer: gametes
Explanation: :)
Which of the following does NOT increase genetic diversity?
A. Independent Assortment of Chromosomes
B. Random Fertilization
C. Crossing Over
D. Mitosis
Which of these is evidence of sea floor spreading?
A Mt. Fuji Japan
B Great Rift Valley in Africa
C Mid Atlantic Ridge
D Mt. Everest Nepal
Explain how layers that form in ice are similar to tree rings
first answer gets brainliest
Explanation:
Layers of ice and tree rings are similar in that they can both record or store data from past environmental conditions. ... Just like the tree rings specific sections represent a specific period of time. Air bubbles trapped in ice provides information on past climates.
The layers that form in ice are similar to tree rings in the following ways such as record of time, environmental information, dating method, and preservation of records.
How are the layers in ice similar to tree rings?Record of time: Both ice layers and tree rings serve as a record of time, with each layer or ring representing a specific period. In the case of ice, layers are formed annually due to seasonal changes in snowfall and temperature, while tree rings are formed yearly as a result of new growth during the growing season.
Environmental information: Both ice layers and tree rings provide valuable information about past environmental conditions. Ice layers can reveal information about temperature, precipitation, and atmospheric composition, while tree rings can indicate temperature, precipitation, and even ecological events such as forest fires or pest outbreaks.
Dating method: Both ice layers and tree rings can be used as dating methods in scientific research. By counting the number of layers or rings, scientists can determine the age of the ice or tree, and by extension, the age of the surrounding environment or historical events.
Preservation of records: Both ice layers and tree rings are preserved over time, allowing scientists to study past climates and environments. In ice, the layers can be preserved in glaciers or ice sheets, while tree rings are preserved in the wood of the tree.
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Choose all the answers that apply. Precipitation:
a.creates new water
b. occurs after condensation
c.is roughly equal to the amount of evaporation
d. occurs evenly all over the earth
e. returns freshwater to the earth
Answer: e and a
Explanation:
Answer:
occurs after condensation
is roughly equal to the amount of evaporation
Explanation:
What products are formed during respiration?
Options:
A: Glucose and oxygen
B: water and carbon dioxide
C: water and glucose
D: water and oxygen
Part 2:
Is energy absorbed or released during respiration?
A: Absorbed
B: released
Part 3.
The energy produced during respiration is placed into what energy molecule?
A: glucose
B: adenosine Triphosphate (ATP)
C: light energy
Answer:
The answer to this question is A.
Explanation:
What is the is the difference between the littoral and limnetic zone?
Answer:
The topmost zone near the shore of a lake or pond is the littoral zone. The near-surface open water surrounded by the littoral zone is the limnetic zone. The limnetic zone is well-lighted (like the littoral zone) and is dominated by plankton, both phytoplankton and zooplankton.
Explanation:
A sperm cell fertilizes an egg cell, as shown below.
This process plays a vital role in
A.
reproduction.
B.
growth.
C.
budding.
D.
binary fission.
Answer:
A) Reproduction
Note:
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A population of a certain kind of fish is introduced into a new habitat. These fish have variations in color from light to dark. Because of the lighting conditions and predators in this new habitat, light colored fish survive better near the surface and dark-colored fish survive better near the bottom. What change would likely result after many generations of these fish living in this environment
Answer:
There would be two populations of fish:
Light-colored fishes near the surface
Dark-colored fishes near the bottom.
Explanation:
After many generations, there would be two populations of fish: Light-colored fishes near the surface and Dark-colored fishes near the bottom as light-colored fish survive better near the surface and dark-colored fish survive better near the bottom due to the lighting conditions and predators in the new habitat.