Answer:
One of these specifications is a characteristic known as rifling, which refers to the spiral lands and grooves placed into the firearm's barrel to impart a spin on the bullet for accuracy. ... Examiners generally test fire into a water recovery tank to obtain comparison bullets for evaluation under the microscope.
What are 2 things to all cells have?
Answer:
All cells have CYTOPLASM and DNA.
Explanation:
my answer got deleted.
Question 2
In this part of the experiment, you’ll prepare and test three milk solutions: milk and water, milk and lactase enzyme, and milk and heated lactase enzyme.
Prepare
Use masking tape to label the three beakers: “milk,” “lactase solution,” and “heated lactase solution.”
Measure 60 milliliters of milk in the graduated cylinder (or ¼ cup of in a measuring cup. Pour it into the beaker labeled “milk.”
In the beaker labeled “lactase solution,” add one lactase tablet and 100 milliliters (or 1/2 cup) of cool or room-temperature water. Use the stirrer to dissolve the lactase tablet in the water.
Add 100 milliliters (or 1/2 cup) of milk to the microwaveable container. Dissolve a lactase pill in the container. Put the solution in the microwave and heat it to boiling (about 2 minutes). Use oven mitts to remove the container. Pour the heated lactase solution into the beaker labeled “heated lactase solution” and let it cool.
Stay safe! Be careful while handling the boiled mixture to avoid spilling it on your hands.
Test
While you’re waiting for the lactase solution to cool, read the directions on the test strips. The test strips in the Edmentum lab kit will react to glucose within a few seconds. If you use different strips, the reaction time may vary. Now follow these steps to test the solutions. Record your data in the answer space.
Milk and water solution: Fill the first test tube one fourth full of milk. Fill the small graduated cylinder with water and gently add it to the milk in the test tube until the test tube is half full. Use the stirrer to thoroughly mix the solution. Then insert the test strip for 10 to 20 seconds. Look at the test strip, and record whether it changed color. Wash the stirrer.
Milk and lactase enzyme solution: Fill the second test tube one fourth with milk and one fourth with the lactase solution. Use the stirrer to thoroughly mix the solution. Insert the test strip for 10 to 20 seconds, and record whether it changed color. Wash the stirrer.
Milk and heated lactase enzyme solution: Fill the third test tube with one fourth milk and one fourth of the heated lactase solution. Use the stirrer to mix the solution. Insert the test strip for 10 to 20 seconds, and record whether it changed color.
Note: Keep the lactase and heated lactase solutions for the next part of the experiment.
Wash the “milk” beaker, the test tubes, and the stirrer. If you used paper cups as an alternative, throw them away.
Answer:
The bacterium should stop production of lactase.
Explanation:
This is because the E. coli bacteria can degrade lactose, but lactose is not preferred as source of fuel or energy to glucose. If glucose is present, E. coli would preferably employ it over lactose as Glucose needs little process and minimal energy to degrade when compared to lactose. Although, if lactose is the major sugar that is present, the E. coli will have no option than to employ it as it's source of fuel or energy. The formation of lactase enzyme utilizes energy, which cannot be utilised in the presence of high level glucose.
This appears to be a set of instructions for a lab experiment involving testing different milk solutions with lactase enzyme.
What is lactase enzyme?Lactase is an enzyme that breaks down lactose, a sugar found in milk and dairy products, into glucose and galactose. People who are lactose intolerant have insufficient levels of lactase, which can lead to symptoms such as bloating, gas, and diarrhea when they consume dairy products.
The experiment involves preparing three different solutions (milk and water, milk and lactase enzyme, and milk and heated lactase enzyme) and then testing each solution with a test strip to see if it changes color, indicating the presence of glucose.
The instructions also include safety precautions, such as being careful while handling the heated lactase solution. Finally, the instructions remind the reader to wash all equipment used in the experiment.
Some people may have lactose intolerance, which means that they do not produce enough lactase to break down lactose in their bodies, resulting in discomfort and digestive problems.
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1. Chantelle was given a sample of breakfast cereal to test for carbohydrates. (a) First, she decided to test the sample for glucose. Describe the test she should carry out and the results she might expect if glucose is present.
Answer:
The correct answer is - Benedict's solution for the test for glucose in food.
Explanation:
Benedict's solution is a test that is used to check if there is a presence of glucose in a food sample or not. It is possible due to the oxidation of the aldehyde present in the glucose turns to carboxylic acid in presence of the clear blue solution of sodium and copper salts or benedict's solution.
In presence of Benedict's solution the color of the sample turns yellow to orange with an increase in heat, however, the initial color of the solution is aqua blue.
Thus, the correct answer is - Benedict's solution for the test for glucose in food.
Hypothesis: If the type of the food available
changes, then the frequency of beak types will
change, because birds with beaks more suited
to the available food will be more successful
over time.
The data of this lab
the
hypothesis because there was a difference in bird
beak distribution
DONE
answer:
supported, when fruit was removed
explanation:
the data of this lab supported the hypothesis because there was a difference in bird beak distribution when fruit was removed
the second question:
which possible outcome below would not have supported the hypothesis?
answer:
if generation 3 had flock distributions similar to those shown in the graph below
Hypothesis has to do with the explanation that can be applied to a particular situation.
What is a hypothesis?The term hypothesis has to do with the explanation that can be applied to a particular situation. The hypothesis is often based upon a close observation.
The data is not shown here. However, the data does confirm or disprove a hypothesis as the case may be.
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what are the scientist doing incorrectly? what could they do to make their work in the lab safer? why is it important to follow these procedures? part b
Answer:
What the scientist is doing incorrectly is hitting a rock with a hammer without protective equipment and on the same table where containers with chemical or biological substances are found.
Explanation:
Biosafety is an important aspect of laboratory work. Conducting studies in rocks, trying to fracture them with the use of a hammer is an incorrect practice carried out by a scientist when he does not use protective equipment and has containers with substances on the same work table.
what could he do to make their work in the lab safer?Wear gloves, protective apron and protective eyewear.Break the rock on a work table where there are no containers that could break by accident, spilling their contents.why is it important to follow these procedures?It is important to follow these procedures because injuries to hands, body or eyes can be avoided by fracturing the rock. In addition, it prevents the breakage of containers with chemical or biological products, which could contaminate the work area or cause damage to the scientist.
Which term is defined as masses of rock,earth and/or debris that flow downhill.
A.tsunami
B.aftershock
C.liquefaction
D.landslide
Answer:
The term that defines masses of rock, earth and/or debris that flow downhill is landslide (option D).
Explanation:
When a landslide occurs, a certain amount of the mass of earth is detached or displaced downwards, due to the instability present in a certain area, especially when there is a slope in that land or slope .
The area that is unstable is usually in proximity to a stable ground zone, over which the slide occurs. The instability produced by the phenomenon is due to the fact that this ground has reached its maximum tangential tension.
In a landslide, the movement of rocks, debris and everything in the strip of land that slides can also be observed.
The other options are not correct because:
A. Tsunami is the term for tidal wave, which impedes the displacement of large bodies of water, like waves, that reach the continent.
B. Aftershock is the term that defines the seismic movements after an earthquake.
C. Liquefaction of the earth implies that a compact terrain loses strength and becomes semi-liquid.
Will give brainliest to whoever gets it right at the end of my exam :))
Answer:
#3
Explanation:
explain why a fresh wound on the skin bleeds more on a hot day than a cold day
Answer: This is more of a guess based on what I already know about liquid in certain temperatures but I would say it would have to be related to the blood having a harder time congealing due to the molecules moving faster because of the temperature. You probably already know that atoms move faster in higher temperatures as opposed to cooler ones, therefore the process of congealment and essentially transitioning from liquid to solid would be easier/quicker in cooler temperatures where the atoms in and around the wound would be moving slower.
Explanation:
Which fish species are the least tolerant of water pollution? Which fish species are most tolerant. how would you arrive at your conclusion?
Fishes used;
Bass
Carp
Gar
Catfish
Trout
Which defensive adaptation would best help a plant survive in an environment with leaf-eating animals?
A.
large fruits
B.
thick stems
C.
sharp thorns
D. colorful flowers
Answer:
C. sharp thorns
Explanation:
The plants stand still, are not very physically active, and seem to be on the menu of many animals. Precisely because they cannot win at the first sign of danger, one has developed other ways in which they can defend themselves from annoying and dangerous animals.
Some have developed long thorns that repel attackers. Some have poisons that are very strong and because of which animals do not think of trying to eat that plant, but the defense of some plants seems to be well thought out and ready for all forms of attack.
Atoms in covalent bonds _____ their electrons.
Answer:
share
Explanation:
covalent bonds share electrons
ionic bonds transfer electrons
Location X is next to Location Y and they are both much colder than Location Z. Which statement is most likely true? a Locations X and Z are at the poles. b Locations X and Y are at the poles. c Locations X and Z are at the equator. d Locations X and Y are at the equator. WILL MARK BRAINLIEST
if you were standing in the path of totality,what type of eclipee would you see?
Answer:no
Explanation:
Because you could be blind
Answer:
You'd see a full eclipse.
Explanation:
The path of totality is the path that the umbra of the moon's shadow takes. It's relatively thin, as it's only 70 miles across, but if you stand in the path you will experience a full solar eclipse.
Can anyone name all these parts of the microscope? please label each part with the number on the picture.
Answer:
Explanation:
What will most likely happen if the plankton population decreased in this ocean system?
Answer:
B since shrimp rely on plankton as a food source.
Explanation:
Which pair of objects has the largest gravitational force?
a- car and bowling ball
b- marble and baseball
c- There is no gravitational force between any of these pairs of objects.
d-marble and can
Answer:a
Explanation: they are bigger they take up more space and heavier so the pull of gravity is stronger because of that
PLEASE HELP ME NOW!!!!!!!!!!!
(02.03 HC)
Examine the layers of rock. Identify and explain which layer contains the youngest fossils. (3 points)
Answer:
A
Explanation: A is the youngest bestie <3333
Answer:
A
Explanation:
Because it is at the top
A dinoflagellate is a microscopic organism that is very common in the ocean. It consists of a single cell and has a flagella that it uses to move. It has chromosomes that are held in a nucleus in the cell. What kingdom does this organism belong in? Explain your choice
Answer:
Usually considered algae, dinoflagellates are mostly marine plankton, but they also are common in freshwater habitats. Their populations are distributed depending on sea surface temperature, salinity, or depth.
Explanation:
Answer for brainliest answer
Mutations that occur _____ can affect offspring
1. During mitosis
2. During meiosis
3. In replicated dna
4. In body cells
Answer:
2. During meosis
Explanation:
During meosis mutations affect offsprings
plssssss help me to answer this question.......
I will mark you brainliest (just answer it correctly) asap
Answer:
Explanation:
There are five columns here; electronic configuration (electron distribution), number of shells, valence electrons (number of electrons on the outermost shell that can participate in bond formation), period number (on the periodic table) and group number (on the periodic table).
Aluminium-13 (₁₃Al)
This means Aluminium has 13 electrons and thus will have the properties below
Electronic configuration: 1s²2s²2p⁶3s²3s¹
Number of shells: From the electronic configuration written above, Aluminium-13 has 3 shells.
Valence electrons: The number of valence electrons (as seen in the electronic configuration - for the third shell) is 3.
Period number: Aluminium is found in period 3 because it has 3 electron shells
Group number: Aluminium is found in group IIIA because it has 3 electrons in it's outermost shell.
Calcium-20 (₂₀Ca)
This calcium atom has 20 electrons and thus have the following properties.
Electronic configuration: 1s²2s²2p⁶3s²3p⁶4s²
Number of shells: As seen in the electronic configuration above, calcium-20 has 4 electron shells.
Valence electrons: As seen in the electronic configuration also, the total number of electrons/valence electrons in the outermost shell is 2.
Period number: Calcium-20 is found in period 4 of the periodic table because it has four electron shells.
Group number: Calcium-20 is found in Group IIA of the periodic table because it has 2 electrons in it's outermost shell
Tin-50 (₅₀Sn)
This tin atom has 50 electrons and hence have the following properties
Electronic configuration: [Kr] 4d¹⁰5s²5p²
Where [Kr] is the electronic configuration of krypton atom
Number of electron shell: From the electronic configuration above, Tin-50 has 5 electron shells
Number of valence electrons: From the electronic configuration also, it has 4 valence electrons.
Period number: It is found in period 5 because it has 5 electron shells
Group number It is found in Group IVA because it has 4 electrons in it's outermost shell
Barium-56 (₅₆Ba)
Electronic configuration: [Xe] 6s²
Number of shells: 6
Number of valence electrons: 2
Period number: Period 6
Group number: Group IIA
Selenium-34 (₃₄Se)
Electronic configuration: [Ar] 3d¹⁰4s²4p⁴
Number of shells: 4
Number of valence electrons: 6
Period number: Period 4
Group number: Group VIA
When chromosome arms "cross over" and exchange genetic information
during meiosis itis called a *
Answer:
an offspring
Explanation:
Answer:
Isn't it crossing over
it should be
Answer asap
In what stage are humans learning essential skills like hunting, cooking and animal identification
Adult
Childhood
Adolescence
Infancy
Answer:
Adolescence
Explanation:
Given that infancy, age is the age of little children from the point of birth to about four years
Hence, this cannot be an answer.
Childhood is wrong because the childhood age is the age of 2 to 13. At such a tender age, one cannot go hunting due to fear of wild animals or have the capacity to learn to cook different food
Adult is also not correct because Adult age lies between 21 to 40 when middle age comes by. At this stage, one is expected to have at least basic skills to survive.
Therefore the correct answer is Adolescence. This is the age of 10 to 19. It is the last stage before Adulthood where one has to hone his basic and surviving skills. At this point, it is believed one has full mental capacity.
Answer:
Its Childhood don't listen to the other guy
Explanation:
I just got it right on my quiz
Elevated fibrinogen levels result in a(n) ___________, which increases the risk of a coronary or cerbrovascular incident.
Answer:
hypercoagulable state
Explanation:
Elevated fibrinogen levels result in hypercoagulable state , which increases the risk of a coronary or cerbrovascular incident.
A hypercoagulable state in medicine refers to a condition in which there is an abnormal increase in the tendency toward the clotting of blood also known as blood coagulation.
When fibrinogen levels are high, there is an increase in clot stiffness, increase in resistance of the clot to fibrinolysis as well as an increased blood viscosity.
explain why the statement below is incorrect
plants give off carbon dioxide into the air
Answer:
plants don't give off carbon dioxide because they use carbon dioxide to make oxygen
when a chicken with black feathers mates with a chicken with white feathers, their offspring may be a speckled hen. Half of a speckled hen's feathers are black and the other half are white. This is an example of:
A. multiple alleles
B. simple dominance
C. Codominance
D. incomplete dominance
Answer:
codominance
Explanation:
I NEED HELP ASAP!!!! BRAINLIEST AND 50 POINTS!!!! Cycles in nature involve the recycling of matter. Which of the following processes is a key part of the water (hydrological) cycle? a
transpiration
b
combustion
c
photosynthesis
d
decomposition
Cycles in nature involve the recycling of matter the following processes is a key part of the water (hydrological) cycle the photosynthesis.
What is the importance of water cycle?The water cycle is a critical ecological procedure that continues the share of water in the earth's ecosystem and ecosystems. The water cycle entails the cyclic motion of water from water our bodies and groundwater into the ecosystem via plants, which play a position in this cycle through photosynthesis and transpiration.
Photosynthesis in concerned withinside the water cycle as it helps transpiration and makes use of water as a reactant.
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What happens when an organism is eaten? A. All of its energy is returned to producers. B. All of its energy is gone when it dies and cannot be reclaimed by the ecosystem. C. A small portion of its energy is absorbed by the consumer, the rest is transformed into heat or waste. D. All of its energy is absorbed by the consumer.
Answer:
The higher organisms eat the lower organisms, break down their matter and rearrange the molecules to make their own matter. When any organism dies, the remains are broken down and put back into the cycle as inorganic molecules. Each of these organisms eat organic matter to produce energy and small pieces of matter.
Write and discuss brifely the basic application and implication areas of major branchs of psycology
Answer:
Psychology is the academic discipline concerned with the inner life (knowing, feeling and striving) and the behavior of people. It generally does this by following the scientific method, but in some cases it makes use of symbolic interpretation and critical analysis, following the example of other social sciences.
The goal of psychology is to acquire knowledge about the behavior of humans, both in their everyday environment and under special circumstances. With the emergence of the behavioral movement, the object of psychology was reduced to the outwardly observable and measurable behavior of animals humans, because the inner life would not be objectively registered by scientific observation, but only subjectively by introspection and understanding. This limitation has been reversed, among other things by the 'cognitive revolution' in psychology, by the great social importance of psychotherapy and by the connotations that the word 'psychology' evokes in everyday language use.
2. A unique characteristic of the banyan tree is that roots grow down from its
branches into the ground. The tree can appear to have several trunks. What
advantage does this root characteristic give the banyan tree over other trees?
A. The roots provide shelter for ground-dwelling animals, which carry nutrients
to the tree.
B. The banyan can grow near the equator, because aboveground roots are
more protected from the sun.
C. The banyan can only grow in humid climates, because aboveground roots
are more likely to dry out and die during droughts.
D. The banyan can grow in areas prone to hurricanes and typhoons because
the roots make the tree more stable in high winds.
Answer:
D. The banyan can grow in areas prone to hurricanes and typhoons because
the roots make the tree more stable in high winds.
Explanation:
According to this question, banyan tree posseses a unique characteristic in which roots grow down from its branches into the ground making the tree appear to have several trunks. This type of root is called STILT OR PROP roots.
The major function of this stilt roots is to provide additional support for the plant during adverse conditions. Hence, a major advantage that this root characteristic give the banyan tree over other trees is that it confers resilience upon the banyan tree, making it able to grow in areas prone to hurricanes and typhoons because the roots make the tree more stable in high winds.
Earth's outer core is made of_____.
A. solid rock
B. liquid rock
C. solid metal
D. liquid metal
Answer:
Liquid metal.
Tell me if wrong. :) Hope it helps!
Explanation:
Answer:
A) No problem
Explanation:
solid rock