Answer:
The inner core is solid, the outer core is liquid, and the mantle is solid/plastic. This is due to the relative melting points of the different layers (nickel–iron core, silicate crust and mantle) and the increase in temperature and pressure as depth increases.
Explanation:
(b) Describe how a student could test cow's milk to show whether it contains protein
different types of carbohydrate.
To show that cow milk contains protein and different types of carbohydrate,food tests should be carried out by the student.
Carbohydrates (sugars) are the main sources of food through which the body derives energy from.
The various types of carbohydrate are the simple sugars, complex sugars and starch.
Proteins are the main body-building substances which are necessary for the maintenance of health.
The cow milk contains proteins and a type of carbohydrate called lactose which is an example of complex sugar.
To test for protein in milk, xanthoproteic reaction test should be carried out by the student. The procedure includes:
To the milk solution add a few drops of concentrated nitric acidA white precipitate forms, which turns yellow on heating.Cool the contents and add a few drops of ammonia solution.The colour of the precipitate deepens to yellow indicating presence of protein in the cow milk.To test for carbohydrate in milk, a test for complex sugar should be carried out by the student. The procedure includes:
Add milk solution and hydrochloric acid into a test tube. Place the test tube inside a boiling water-bath.The acid hydrolyses the complex sugar to simple sugars.Fehling's test is then carried out on the simple sugars that are formed which are glucose and galactose.An orange-red precipitate indicates a positive result.Learn more here:
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What is endocytosis?
a. Osmosis
b. Particles in the nucleus
c. The cell taking in molecules
d. DNA
Answer:
c. The cell taking in molecules
Explanation:
When writing a hypothesis in this class, an if... and... then... statement is
used. What is written after the if?
Controlled Variable
Independent Variable
Dependent Variable
Constant
What would you need to know to determine the total amount of photosynthesis going on in the canopy and near the forest floor? Why?
Answer:
you would need alot of water and soil
Explanation:
Look up at the night sky and just wonder. Then tell me what you wondered about.
I wonder what sort of stuff happens up there that nobody is aware of. All the different kinds of possibilities. And if there is life, then what would they be doing and how are their ways of life?
Name two social changes which take place during adolescence.
Social changes in adolescence
Young people are busy working out who they are and where they fit in the world. You might notice your child trying out new things like clothing styles, music, art or friendship groups. Friends, family, media, culture and more shape your child's choices in these years.
Social changes in adolescence. Young people are busy working out who they are and where they fit in the world.
What is Adolescence?Adolescence, which lasts from ages 13 to 19, is the period between childhood and adulthood.
Adolescence's physical and psychological changes frequently begin earlier, between the ages of 9 and 12, during the preteen or "tween" years.
Teenage years can be a time of confusion and discovery. As adolescents develop their sense of self, they may have to make challenging decisions regarding their academics, friendships, sexuality, gender identity, use of drugs and alcohol, and independence.
Therefore, Social changes in adolescence. Young people are busy working out who they are and where they fit in the world.
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What conditions were necessary for the first matter to form in the Universe?
Explain why
Answer:
hydrogen and helium couldn't form until the universe had cooled enough to allow their nuclei to capture electrons, about 380,000 years after the Big Bang. Within about 3 minutes after the Big Bang, conditions cooled enough for these protons and neutrons to form hydrogen nuclei.
Explanation:
Write the classification of bamboo as per hierarchy and it’s characteristics
Explanation:
kingdom - plantae
Divison - Magnoliophyta
Class - Liliopsida
Order - Poales
Family - poaceae
Genus - Chusquea
Species - C. antioquensis
They have fibrious root system.
If the percent concentration is equal both inside and outside a cell, water does not move into or out of the cell?
Which best describes the relationship between temperature and dissolved oxygen in a lake?
As temperature increases, dissolved oxygen increases.
As temperature increases, dissolved oxygen decreases.
As temperature decreases, dissolved oxygen decreases.
A change in temperature has no
effect on dissolved oxygen.
Explanation:
Air and Water Temperature Increases
For example, increases in water temperatures are expected to result in the following: Lower levels of dissolved oxygen due to the inverse relationship that exists between dissolved oxygen and temperature. As the temperature of the water increases, dissolved oxygen levels decrease.
Describe ways in which a healthy artery differs from an artery affected by coronary heart disease
6. Alex wanted to find out what toothpaste made teeth the cleanest. Everyday she brushed her teeth with a different product and then took a plaque test to see how much plaque was left. She used Crest, Colgate, Close-up, and water. a. Independent Variable (IV): ______________________________________________ b. Dependent Variable (DV): ______________________________________________ c. Control: _____________________________________________________________ d. Constants:__________________
Answer:
Independent variable: Different products of toothpaste
Dependent variable: Amount of plaque left in her teeth
Control group: Water
Constant: Same amount of time for product to have an effect
Explanation:
Independent variable is the variable that is subject to manipulation or change by the experimenter in order to effect a measurable response. The independent variable in this experiment is the DIFFERENT PRODUCTS OF TOOTHPASTE USED.
The dependent variable is the variable that is measured during the experiment. In this experiment, the dependent variable is the AMOUNT OF PLAQUE LEFT IN ALEX'S TEETH.
The control group in an experiment is the group that does not receive the treatment/independent variable. In this case, the usage of WATER is the control.
The constant is the variable kept the same for all the groups in the experiment. In the case, the Same amount of time for each product to have an effect on her teeth is the CONSTANT.
how do ivasive species impact the carrying capacity of ecosystems?
Helpp ASAP !!!!!
Answer:
Invasive species can change the food web in an ecosystem by destroying or replacing native food sources. The invasive species may provide little to no food value for wildlife. Invasive species can also alter the abundance or diversity of species that are important habitat for native wildlife.
What element is always present in a nucleic acid but is never present in a carbohydrate or amino acid
Carbon Sulfur
Proteins Always Sometimes
Carbohydrates Always Never
Nucleic Acids Always Never
Lipids Always Never
Fox is related to cunning, as leaf is related to
1. Calcium
2. hub
3. sap
4. crump
Which one of the following is true of the structures labeled D in the cell membrane?A.They are membrane proteins.B.They are hydrophilic.CThey are carbohydrates.D.They are hydrophobic?
The structure labelled D in the cell membrane is hydrophilic in nature. That is option D.
What is phospholipid bilayer?Phospholipid bilayer is defined as the part of the cell membrane that is made up of two phospholipid layers which include:
Hydrophobic layer: The interior which is water hatingHydrophilic layer: The exterior that is water loving.Therefore, from the diagram, the structure labelled D is the interior part of the phospholipid bilayer which is hydrophilic in nature.
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Early scientists believed the earth was around 6,000 years old. What do scientists
currently believe?
Answer:
they now also believe that earth is 6000 years old
Explanation:
How are decomposers important to the health of an ecosystem?
A. Decomposers recycle nutrients.
B. Decomposers convert solar energy to chemical energy.
C. Decomposers provide the foundation for the food web.
D. Decomposers are parasites.
Answer:
Decomposes recycle nutrients
Explanation:
Ape-x
where does the word atom come from
Answer:
greek word atomos which means invisible a- means not and -tomos means cut
Explanation:
Explanation:
Greek philosophers such as Democritus and Epicurus suggested that matter is made up of tiny indivisible particles called atoms. The word atom is derived from the Greek word atomos, which means indivisible or uncut.
What are the functions of sugars
Answer:
the provide the energy u need
Explanation:
Where is the spine ? i want the answer
Answer:
in your back
Explanation:
Answer/Explanation:
The spine is located in the person's back. It is right along the midline and is split in half when looking at the sagittal plane. Although some people have spinal issues which can cause it to be dislocated.
Hope that helps and have a great day!
When blood glucose levels are high and the glucose is not utilized for cellular respiration, the human body will store this glucose in the liver and muscles. In what form is this glucose stored?
A) glycogen
B) maltose
C) starch
D) sucrose
When blood glucose levels are high and the glucose is not utilized for cellular respiration, the human body will store this glucose in the liver and muscles. In what form is this glucose stored?
A) glycogen
B) maltose
C) starch
D) sucrose
Answer:
a and d ok
Explanation:
hello
Many cells make and use an enzyme, called catalase, to facilitate the decomposition of hydrogen peroxide (H2O2). The products of the decomposition are hydrogen (H2) and oxygen (O2).
Which of these changes to the cell would cause the greatest reduction in the activity of catalase?
A)
a decrease in the concentration of hydrogen and oxygen
B)
an increase in the concentration of hydrogen peroxide
C)
an increase or decrease in pH beyond normal range
D)
a return of pH to the normal range
Answer:
B an increase in the concentration of hydrogen peroxide.
Explanation:
Which best defines homeostasis? modifying the external environment maintaining a stable internal environment controlling what enters and exits the cell movement of materials into the cell
Answer:
B. maintaining a stable internal environment
Explanation:
Took the test :)
Answer: yes its B
Explanation:
i will mark as Brainliest if answered
Answer:
5.e glycerol and fatty acids
6.a C:H:O
For each picture shown, choose the level of organization depicted.
Answer:
1. cell
2. organ system
3. tissue
4. organ
Explanation:
I had the same question and got these answers and they were registered as correct
Hopefully this helps you
pls mark brainlest
1. cell
2. organ system
3. tissue
4. organ
What is cell?"A cell is defined as the smallest, basic unit of life that is responsible for all of life's processes.” Cells are the structural, functional, and biological units of all living beings. A cell can replicate itself independently. Hence, they are known as the building blocks of life
What defines an organ system?An organ system is defined as a group of organs that work together to perform bodily functions. For example, the organs in the gastrointestinal (GI) system each play a unique, important role in food digestion.
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8
During cellular respiration, the bonds of food molecules are broken, so energy can be released to fuel other cellular processes. In
order for this to occur, which of the following statements must be true?
tho honds of the fond molecules.
Answer:
B.) New compounds with lower-energy bonds must be formed when the high-energy bonds in food molecules are broken.
Explanation:
I hope it helped
How do consumers use the sun to get their energy?
Photosynthesis is the main source of energy for these
eukaryotes. This multicellular organism has cell walls
around all of its cells. .
and cell membranes around all lf its cells
Which equation has water as a reactant in chemical reaction?
Answer:
Na + H2O NaOH + H2 is the ans