Answer:
Enzymes reduce the amount of activation energy needed by breaking substrate molecules
Explanation:
Enzymes break down substrate molecules to lower the amount of activation energy required.
What is activation energy?The least amount of energy necessary to bring atoms or molecules into a state where they may cause chemical transformation or physical transport is known as the activation energy in chemistry.
The differential of energy content between atoms or molecules in an active or transition-state configuration and the same atoms and molecules in their original configuration is known as the activation energy in transition-state theory. In mathematical formulas for values like the reaction rate constant, the activation energy is typically denoted by the symbol Ea.
Experimental rate constants or diffusion coefficients that are determined at various temperatures are used to calculate activation energies.
Therefore, Enzymes break down substrate molecules to lower the amount of activation energy required.
Read more about activation energy, here
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With the help of circulatory it produce blood cells.
A. Excretory
B. Muscular
C. Endocrine
D. Skeletal
Answer:
Skeletal
Explanation:
Think about the bone marrow.
Answer:
D. Skeletal
Explanation:
blood cells are formed in the red bone marrow of bones. Stem cells in the red bone marrow are called hemocytoblasts. They give rise to all of the formed elements in blood. If a stem cell commits to becoming a cell called a proerythroblast, it will develop into a new red blood cell.
- Which occurrence is the result of the cell cycle in unicellular organisms?
A. cell repair
B. cell growth
C. cell replacement
D. cell reproduction
Answer:
D
Explanation:
Cell reproduction is the result of the cell cycle in unicellular organisms. The correct option is D.
What is cell reproduction?Cells split to produce multiple cells with similar, if not identical, contents. This process is known as cellular reproduction.
Nuclear division during mitosis produces two somatic cells that are genetically identical to the parent cell and have the same genetic complement.
Asexual reproduction in prokaryotes takes the form of cell division in unicellular organisms.
When an organism splits in half, it creates two totally distinct daughter cells, a process known as binary fission. The daughter cells are identical to the parent cells genetically.
Most of the time, Paramecium reproduces asexually via budding, however in poor circumstances, they produce sexually.
Unicellular organisms have a variety of asexual reproduction strategies, including multiple fission, fragmentation, and budding.
Thus, the correct option is D.
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Why is a pasture-type system is
more labor intensive than
controlled systems?
A. There is greater maintenance of the
equipment.
B. There is greater need to handle diseases.
C. There is greater area to cover to observe and
manage the animals.
D. There is greater cost of feed per animal.
Answer:
The correct option is C.
There is greater area to cover to observe and
manage the animals.
Explanation:
This is because pasture type system refers to a large area of land where grasses are grown and animals are allow to graze the area of land to obtained nutrients. In this system there is large area of land where animals are well observed while feeding in order to prevent the risk of loss and attacks.
A)x-linked
B)No answer text provided
C)recessive
D)dominant
Answer:
D)dominant
Explanation:
How are gymnosperm seeds and angiosperm seeds different?
Answer:
angiosperms have seeds that are closed within an ovary, gymnosperms have no flowers or fruits, and have unenclosed seeds on the surface of scales or leaves
a radioactive element has a half-life of 3,000 years. if a sample of this element begins with a mass of 60 grams, how long would you have to wait for the mass to decrease to 15 grams
Answer:
N = 60 g
Half life : N/2 = 3000
N/4 = 15 g
The Earth is the only planet known to support life. Which of the following is a major contributing factor to the Earth's ability to support
life?
A) The Earth has a magnetic field with north and south poles
B) The earth has an iron-rich core and is made mostly of rock
C) The Earth orbits the Sun and is orbited by the moon
D) The Earth is surrounded by a layer of air that includes oxygen
Answer:) The Earth has a magnetic field with north and south poles
Explanation:
12 Which direction does blood flow in arteries?
Answer:
Like all fluids, blood flows from a high pressure area to a region with lower pressure.
Good luck!
Answer:
The arteries carry blood out of the heart and the veins carry it in. The flow of blood through the vessels and chambers of the heart is controlled by valves.
where is the most energy stored in the ATP molecule stored
is the above cell a plant cell or animal cell? provide two observable
Explanation:
you have not showed the cell..please
if an earthworm is 18mm long and is photographed and the picture is magnified 2.5x how long will it be in the picture?
Answer:
The earthworm will be 45 mm long in the picture
Explanation:
From the problem, we can take the original size of the earthworm to be 18mm.
Magnification can be obtained using the formula:
magnification = observed size/ original size.
Recall, we are given that the magnification is 2.5.
Hence, can evaluate the size in the picture to be
2.5 X 18mm = 45mm
how does shell color work to protect the egg from sunlight?
Answer:
Birds that live in cool climates lay darker eggs, as darker colors absorb more heat from the sunlight
Birds that live in hotter climates lay lighter eggs to prevent the egg from overheating.
The pigmentation acts to thermo-regulate the internal temperature of the egg, acting as a buffer between the embryo and the outside world. It does this by preventing overheating of the egg, through reflecting the sunlight off the pigmentation, rather than allowing it to be absorbed through the shell
What is your opinion about minor children (under the age of 18) donating one of their kidneys for their brother or sister? Write at least three sentences stating your opinion and backing your answer.
The prolonged increase in heart and breathing rates during the snow skiing trip was probably a result of:______
a. activation of the sympathetic autonomic nervous system by the new experience.
b. activation of the parasympathetic autonomic nervous system by the new experience.
c. hypoxia caused by insufficient blood hemoglobin concentration to supply oxygen for exercise at the low oxygen pressure found at high altitudes.
d. depressed core body temperature (hypothermia) caused by exposure to cold temperatures at high altitudes.
Answer:
The correct answer is - option C.
Explanation:
Skiing generally happens on higher altitudes such as mountains. It is known that there is less oxygen is available at higher altitudes. There is low oxygen pressure at such height.
The prolonged increase in heart and breathing rate is due to less oxygen available for the cells. This condition is known as hypoxia caused by insufficient blood hemoglobin to supply oxygen for physical activities at higher altitudes.
In which stage of the cell cycle does the cell die
A) interphase
B) mitosis
C) apoptosis
12. Removing an organism from an ecosystem will have which of the following affects? Select all that apply.
A. Increase in biodiversity
B. Decrease in biodiversity
C. Increase in the overall health of the ecosystem
D. Decrease in the overall health of the ecosystem
Answer:
B and D
Explanation:
Biodiversity comes from having multiple types of organisms. This also allows different organisms to eat and create nutrients that is needed by all other organisms in the ecosystem.
What do producers dictate in
an ecosystem?
A. the size of the organisms
B. the age of the organisms
C. the amount of organisms
Answer:
C. The amount of organisms
Explanation:
Producers produce food from inorganic matter, this then makes food for other organisms in an ecosystem. The amount of producers dictates how much food is available, and by that how many organisms can be present.
Many of the DD-amino acids found in nature have been discovered in bacterially produced peptides that have antibiotic properties.
a. True
b. False
Answer:
True
Explanation:
Most the amino acid are of L configuration. Antimicrobial peptides consists of D amino acids (D amino acid occur naturally). D amino acids are also found in walls of microorganism. Antimicrobial peptides is released by species including bacteria, fungi etc.
For example - Bacteriocin, peptaibols, plectasin etc.
Hence the given statement is true
For tetracycline , describe an experiment that you could
use to determine if a bacterial sample taken from a person was
resistant to your antibiotic. Be sure to describe all steps of the
experiment including your independent, dependent and control
variables.
Answer:
penicillin was the first antibiotic discovered. Alexander Fleming discovered it in 1928. It was used widely during World War II. However, the sulfonamides were the first antibiotic class used clinically (in the 1930's). The discovery of antibiotics revolutionized medicine by making once-deadly infections treatable. There are now hundreds of antibiotics, classified into several categories. These antibiotic classes include:
Explanation:
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the average weather pattern taken over a long period of time is called ............. of that place.
Answer:
Climate
Explanation:
The temperature at which air becomes saturated with water vapor is called the _____.
Answer:
dew point
Explanation:
What happens after Telophase?
&
36/86
>
C
Answer:
The chromosomes begin to uncoil, which makes them diffuse and less compact. Along with telophase, the cell undergoes a process called cytokinesis that divides the cytoplasm of the parental cell into two daughter cells.
Soils in different regions differ based on the _______.
a.
local climate
b.
topography of the land
c.
native organisms
d.
all of the above
Answer:
I think the answer should be local climate
Answer:
i think it's D.
Explanation:
because i just want to do an anser on this thing
Allergies, asthma, high blood pressure, and heart
disease are examples of conditions caused by
Answer:
pollen sorry
Explanation:
i only did this for the points but the real answer is:
Children with allergies, asthma may be at risk of heart problems, with an increased risk of developing high blood pressure, high cholesterol, and obesity. In addition, eczema, a condition that causes itchy, inflamed skin, was common to asthma. here you go! Have a great day!
_____ feedback is when the body reacts in the same direction as a stimulus.
Negative
Positive
Answer:
It's Positive.
Negative is when it reacts against the direction as a stimulus
what is Otis’s gene versions for body color
Answer:
giao
Explanation:
Which of the following are characteristics of Ascomycota? Check all that appply. PLEASE HELP!!
Answer:
2.spores produced in the ascus
4.important in the food industry
6.can cause disease in plants
Explanation:
Answer:
spores produced in the ascus
important in the food industry
important in the digestion of animals (leafcutter ants for one)
can cause disease in plants (dutch elm disease)
can cause disease in animals (candidiasis for one)
Explanation:
Which characteristic helps grasses survive dry conditions?
long, flexible stems
long, skinny leaves
small, soft flowers
deep roots
answer: deep roots. hop u do good on ur test guys
Term
1.
2.
3.
countrationer
5.
6.
7.
8.
9.
10.
11.
12.
Definition
high to low movement of molecules; uses transport protein; no energy required
a solution that has the same concentration of solute as the cells it surrounds
water-loving
a difference in the concentration of molecules from one location to another
structure that identifies the cell
having less solute molecules than the cytoplasm of a cell
allows certain molecules to pass through; keeps some molecules out
the amount of molecules in a specified area
use of vesicles to move large molecules out of the cell
the substance that is dissolved in a solution
movement of molecules from a low to high concentration; uses transport protein;
requires energy
movement of water from an area of high concentration to an area of low
concentration through a cell membrane; no energy required
mixture created when one substance is dissolved in another
movement of molecules from an area of high concentration to an area of low
concentration; no energy required
use of vesicles to move large molecules into the cell
a solution that has a higher concentration of solute molecules than the cytoplasm
of the cell it surrounds; will cause cells to shrink
phospholipid and protein covering of every cell that controls what goes into and
out of each cell
the liquid that dissolves the solute in a solution
water-fearing
a solution that has a lower concentration of solute molecules than the cytoplasm
of the cell it surrounds; will cause cells to swell and burst
a structure that helps to move molecules across the cell membrane
current model that describes membrane structure in which a phospholipid sea is
embedded with a wide variety (mosaic) of protein molecules
13
14.
A diffusion
15.
16.
17
18.
19.
20.
21.
22.
Answer:
structure that identifies the cell / recognizes stuff around the cell. hypotonic. having less solute molecules than cytoplasm of a cell / having a lower ... movement of molecules from low to high; uses transport protein; requires energy ... movement of molecules from high concentration to low concentration; no energy required.
Explanation:
Comment on the folding of protein in vaccum
Answer:
Protein folding is a process by which a polypeptide chain folds to become a biologically active protein in its native 3D structure. ... The amino acids in the chain eventually interact with each other to form a well-defined, folded protein. The amino acid sequence of a protein determines its 3D structure.
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