The activity of salivary amylase is halted in the stomach because of its
acidic pH.
The salivary amylase reacts with starch in the mouth and starts the process
of breaking them down. When it gets to the stomach, the action stops after
some minutes as a result of a change in pH as enzyme performs optimally
when at a suitable pH or temperature.
The acidic pH of the stomach inactivates the salivary amylase and the
gastric amylase in the stomach continues with the process.
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what is the differences in the abiotic
factors of the open ocean photic
zone compared to the open
ocean aphotic zone
Answer:
The difference is about the primary production and the oxygen concentration and so the pH of the water. ... In the aphotic zone, there is no light, so vegetal organism can't grow and realize the photosynthesis, the CO2 is accumulated, there is less Oxygen and the pH is lower than in the photic zone.
Explanation:
its on google
What is the answer and give me an explanation??!?!?!
Answer:
beryllium (Be). Beryllium metal is relatively unreactive at room temperature, particularly in its massive form.
Explanation:
How many tissue layers does an embryo have?
Answer:
they have 3 layers
Explanation:
endoderm, the ectoderm, and the mesoderm.
Who tried to help Canadian rebellions?
Americans
Intuits
French
British
Answer: Americans
Explanation: With the help of American volunteers, a second rebellion was launched in November 1838. However, it too was poorly organized and was quickly put down. It was followed by further looting and devastation in the countryside. The two uprisings left 325 people dead, all of them rebels except for 27 British soldiers. Nearly 100 rebels were captured. After the second uprising failed, Papineau left the US for exile in Paris.
Which organism lives in a colony with many others of the same cell type?
Answer: The alga Volvox , or multicellular, as in the phylum Bryozoa. The former type may have been the first step toward multicellular organisms.
Explanation:
A red car and a blue car are moving down the road. The two cars are just alike other than the color. Which car has the most kinetic energy?
The one that is moving downhill
The one that is moving faster
The one that is moving uphill
The one that is moving slower
Answer:
the one moving faster
Explanation:
Year Anomaly Value Actual Temperature
1880
-0.08
1900
0.03
1920
-0.39
13.51
1940
1960
0.23
1980
2000
0.32
14.22
Answer:
.32
Explanation:
probably
In the classic Meselson and Stahl experiment, E. coli are first grown in 15N-enriched media (0th generation) and, subsequently, switched to 14N-enriched media. A DNA sample isolated during the first generation of E. coli grown in 14N media is subjected to a centrifugation step in a dense CsCl gradient.
Assuming that replication occurs in a semiconservative fashion, the DNA sample will:____________
a) run as two bands (of equal intensity), one at the same position as a uniformly 15N-labeled DNA, and one at the same position as a uniformly 14N-labeled DNA.
b) run as one band, at the same position as a uniformly 15N-labeled DNA.
c) run as one band, at the same position as a uniformly 14N-labeled DNA.
d) run as one band, at a position expected for a DNA containing a 14N:15N ratio equal to 7.
e) run as one band, at a position expected for a DNA containing a 14N:15N ratio equal to 1.
Answer:
The correct answer is - option e.)
Explanation:
The experiment that was performed by Meselson and Stahl was created to prove that DNA replication is a semiconservative process.
When Bacteria grow on 15N media they incorporate the isotype of nitrogen and after few generations, the culture moved to 14N media where it incorporates as they replicate in semi-conservative mode and one DNA strand comes from the Parent DNA.
The right option for question one is Option (e) Run as one band, at a position expected for DNA containing a 14N:15N ratio equal to 1.
What is the density? Mass = 44g ... Volume = 44L
mass = 44g
volume= 44L
1 liter = 1000cm^3
hence 44L = 44000cm^3.
Density = mass/volume
= 44/44000
= 0.001g/cm^3.
What is the equation for the line of reflection?
Ay
4
B
B
A
A'
2
D
с
с
D'
х
2
4.
6
6
8
10
27
Answer:
the line is perpendicular I think it a good thing that is your choice of a line has to the line y-4 you can make 60-6 with the given point
Which statement represents an abiotic environmental factor in an ecosystem?
•The lion hunting the gazelle.
•The flower growing on the vine.
•The fish swimming in the lake.
•The air temperature in the mountains.
Answer:
An example of an abiotic factor within an ecosystem is the air temperatures in the mountains.
Explanation:
In an ecosystem, abiotic factors refer to all those non-living elements, which depend on chemical and physical elements. Water, soil, wind, temperature, climate, minerals and soil pH are abiotic elements.
In comparison to the other statements, the one that corresponds to an environmental abiotic factor is the air temperature in the mountains, describing even two factors, air and temperature.
The other alternatives, lion hunting the gazelle, flower growing on the vine or fish swimming in the lake represent biotic or living elements of an ecosystem.
All of the following are examples of limiting factors except
A) Food
B) Soil
C) Space
D) Weather conditions
Answer:
soil is the answer
Which of the following is a cost of mining aluminum from new bauxite
deposits?
A. It requires a large amount of energy.
B. It can be recycled over and over again.
C. It takes less energy to transport this lightweight metal.
D. It helps preserve plants and animals in rain forests.
Answer:
The process is high-energy intensive (the alternative answer)
Explanation:
Why does the last line create a satisfying ending?
O It makes the reader wonder what happened.
O It describes the writer's frustration with the task.
O It indicates that the writer is well liked.
O It shows that the writer succeeded in his task
Answer:
The answer is D. the person in the comments got it correct :)
Explanation:
i just did it
7. The periodic table has changed over time as new elements have been added to it. Which
is the most likely reason scientists update the periodic table?
A. Scientists rename old elements.
B. Scientists discover new elements.
C. Stars produce new elements that travel to Earth.
D. Past mistakes are corrected in identifying elements.
Answer:
it will be the answer B. scientists discover new elenents.
The most likely reason that scientists update the periodic table is that Scientists discover new elements.
What is periodic table?All identified chemical elements are arranged in rows (referred to as periods) and columns (referred to as groups) in the periodic table of chemical elements, also known as the periodic table, in ascending order of atomic number.
The periodic table is used by scientists to quickly refer to details about an element, such as its atomic mass and chemical symbol. Scientists can identify trends in element properties like electronegativity, ionization energy, and atomic radius thanks to the periodic table's arrangement.
Many scientists worked on the issue of grouping the elements, but Dmitri Mendeleev is generally recognized as the periodic table's creator. In 1869, he produced the first version of the periodic table.
Therefore, The most likely reason that scientists update the periodic table is that Scientists discover new elements.
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Are harbor seals a K-selective or R-selective species?
Answer:
They are K-selective
Explanation:
Because harbor seals are mostly captured by humans and are very endangered which are most likely to not survive for the long-term.
One of the main characteristics of the population is its?
Answer:
population size, population density, when scientists population spacing and age structure
Explanation:
because because four characteristics is defined a population and i kind of just know.
label the parts of the diagram. There is no "E"
1.5-carbon sugar 2.adenine 3.chromosome 4.cytosine 5.phosphate group 6.chromatin
Answer:
Explanation:
A: Cytosine
B. Adenine
C.Phosphate Group
D. Carbon Sugar
F. Chromatin
G. Chromosome
The part of the diagram has been labelled correctly here:
A: Cytosine
B. Adenine
C.Phosphate Group
D. Carbon Sugar
F. Chromatin
G. Chromosome
What is nucleotide?It is the sub units and buIlding blocks of DNA. It is made up of a five-sided sugar, phosphate group and then a nitrogen base.
These groups make the backbone of the DNA helix. If you look at a DNA helix, they make the side of the ladder or the side portion. They connect to a nitrogen base which make the steps of the ladder. The type of sugar that is used in a DNA helix is called deoxyribose.
Nitrogen bases are the molecules that make up the steps of the ladders. There are four different nitrogen bases, namely; Guanine, Thymine,Adenine and Cytosine.
Pyrimidines are compounds that make a single 6-sided ring. Examples of pyrimidines are Cytosine and Thymine. Purines on the other hand make 5-sided and 6-sided rings.
Therefore, The part of the diagram has been labelled correctly here:
A: Cytosine
B. Adenine
C.Phosphate Group
D. Carbon Sugar
F. Chromatin
G. Chromosome
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How does nondisjunction affect the gametes’ chromosome numbers?
Answer: Nondisjunction can occur during either meiosis I or II, with different results (Figure 7.8). ... If sister chromatids fail to separate during meiosis II, the result is one gamete that lacks that chromosome, two normal gametes with one copy of the chromosome, and one gamete with two copies of the chromosome.
Descibe how the muscle contracts and recharges starting with the release of Ca+ and ending with the cycle of recharging
Answer:
Open channels allow an influx of sodium ions into the cytoplasm of the muscle fiber. The sodium influx also sends a message within the muscle fiber to trigger the release of stored calcium ions. The calcium ions diffuse into the muscle fiber.
Explanation:
The normal shape of an enzyme is as shown in structure A. If the enzyme’s shape changes to that shown in structure B, what are two consequences of this change?
less binding of substrate
more binding of substrate
won’t follow the lock-and-key pattern of enzyme binding
will follow the lock-and-key pattern of enzyme binding
a substrate reaction independent of the enzyme structure
Answer: I hope this helps! Can I have Brainliest plz :)
Explanation:
When the conformations change from A to B, there is less binding of the substrate. So, the correct option is (A).
What is an Enzyme?Enzymes are types of proteins which act as biological catalysts by speeding up chemical reactions. The molecules on which enzymes can act on are called substrates, and enzymes which convert substrates into different molecules known as products.
It speeds up the rate of a specific chemical reaction in the cell. It is not destroyed during the reaction and is used again and again. Enzymes follow the lock and key principle to bind to the substrate i.e. the specific lock binds to the specific key, similarly the specific enzyme binds to the its substrate.
Enzymes perform the important function of lowering the activation energy of a reaction which is the amount of energy required to initiate the reaction. Enzymes work by binding to reactant molecules and holding them in such a way that the process of breaking and forming chemical bonds occurs more easily.
Thus, when the conformations change from A to B, there is less binding of the substrate. So, the correct option is (A).
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What do these hints point to?
5 POINTS
SQUASH
5 POINTS
80 POINTS
SEEDS
80 POINTS
Answer: Pumpkin
Explanation:
Cucumbers have a lot of seeds but are not squash.
Apples are neither squash nor do they have that many seeds.
Pumpkins are squash and have a lot of seeds so this must be the correct answer.
Melons have a lot of seeds but are not considered squash even though they are related.
Answer:
Pumpkin
Explanation:
56:52 Which process is characterized by the movement of particles from an area of high concentration to an area of low concentration across the plasma membrane without the use of energy? hypertonic transport active transport passive transport dynamic equilibrium
Answer:
The movement of particles from a high concentration area to a low concentration area through the plasma membrane without requiring energy is done by the process of passive transport.
Explanation:
Passive transport is a transmembrane transport mechanism that does not require energy and depends on a gradient of particle concentration.
The plasma membrane is a semi-permeable barrier to the passage of substances, which require transport through them by various transport mechanisms, including passive transport.
The different concentrations of particles on each side of the membrane create a gradient, which makes the movement of particles from the area of highest concentration to the area of lowest concentration, which in some circumstances is a passive transport mechanism, such as simple diffusion or facilitated diffusion.
The other options are not correct because:
Hypertonic refers to a medium where there is a high concentration of particles. Active transport requires energy. Dynamic equilibrium refers to the continuous exchange of substances that occurs between the interior and exterior of the cells.C. Passive Transport.
The person above was correct, that is where I got this answer. If you would like an explanation read theirs.
When you quickly shine the light into the right eye and the pupil constricts why also does the left pupil constrict?
Answer: When the left eye is stimulated by light, the right pupil constricts, because the afferent limb on the left and the efferent limb on the right are both intact. The right direct reflex is intact. When light is shone into right eye, right pupil constricts.
Explanation:
If the sun were to burn out, what would be the first biological process to
stop?
* Cellular respiration
* photosynthesis
*kreb’s cycle
* Calvin cycle
Chose one of the *
Answer:
Photosynthesis
Explanation:
Photosynthesis uses sunlight directly. Light energy from the sun is used to power the reactions of photosynthesis. Carbon dioxide and water are converted into glucose and oxygen.
This is essential for providing plants with food. They break down this glucose to release cellular energy to power all cellular processes.
The Krebs cycle is a stage of cellular respiration
The Calvin cycle is part of the dark reactions of photosynthesis that do not require sunlight.
Why would a distance runner consume carbohydrate instead of protein before a race
Answer: Eating carbohydrates prior to a race improves a runner's endurance , speed, energy and alertness, according to Asker Jeukendrup, a professor of exercise metabolism and academic director of the Human Performance Laboratory at the University of Birmingham in the United Kingdom.
The purpose of consuming carbohydrates is to maximize glycogen stores in the muscles during a run, which can improve endurance and prevent fatigue.
What are Carbohydrates?Carbohydrates are also known as fibers, starches and sugars which are essential food nutrients which are converted into glucose to give energy to the body to function. These complex carbs in fruits, vegetables and whole grain products are less likely to raise blood sugar than simple carbs (sugars) where low-carb diets like keto can be high in fat.
This is the macronutrient found in certain foods and drinks. The carbohydrates is consumed during the race time to maximize glycogen stores in the muscles during a run, which can improve endurance and prevent fatigue.
These are formed by green plants from carbon dioxide and water during the process of photosynthesis which serve as energy sources and essential structural components in organisms.
Thus, the purpose of consuming carbohydrates is to maximize glycogen stores in the muscles during a run, which can improve endurance and prevent fatigue.
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Question 2
Which property of water is the result of an uneven distribution of electrons?
Answer:
Polarity
Explanation:
Water, is a chemical compound with the formula H2O. It posseses properties that makes it a unique substance on Earth. Among these properties is its POLAR NATURE. Polarity of a molecule refers to the separation of electric charges into dipole moment having an opposite charges at the end.
The polarity of water molecule is attributed to the uneven distribution of electrons in the atoms that forms it. Oxygen is a more electronegative atom than hydrogen, hence, it pulls most of the electrons towards itself, making hydrogen atom more electropositive. This forms the polar property of water.
When Bob reaches point "C" on the roller coaster he is moving more slowly. What type of energy does the car have at point C?
Kinetic energy only
Potential energy only
Both potential and kinetic energy.
Neither potential nor kinetic energy.
Answer:
I think both
Explanation:
because both speed and height went down but not sure tho
Answer:
Both potential and kinetic energy
Explanation:
When the roller coaster is slowing down, it is storing some of the energy; Because it is still moving, it's using kinetic energy
Which organism receives energy from the rabbit
Answer:
Eagle.
Explanation:
Because the arrow is going towards the eagle meaning the eagle eats the rabbit and gets the energy.
A sailboat travels 35 km south in 5 hours. Which of the following statements describes the motion of the sallboat?
Answer:
7km/hr
Explanation:
