Answer:
In passive transport, substances simply move from an area of higher concentration to an area of lower concentration, which does not require the input of energy. Concentration gradient, size of the particles that are diffusing, and temperature of the system affect the rate of diffusion.
In active transport, the particles move across a cell membrane from a lower concentration to a higher concentration. Active transport is the energy-requiring process of pumping molecules and ions across membranes "uphill" against a gradient.
Explanation:
The transfer of molecules from higher concentrations to lower concentrations is an example of passive transport, which does not require any amount of energy.
The movement of molecules from a lower concentration to a higher concentration is referred to as active transport. Active transport requires the application of energy.
Types Of Passive Transport
Simple DiffusionDiffusion with Facilitation.Filtration.Osmosis.Active transport mechanisms include
AntiportSymport Pumps.Endocytosis.Exocytosis.Learn more about transport mechanism, here:
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1. The first living organism in a food chain is
a) producers
b) primary consumers
c) heterotroph
d) chemosynthesizer
2. The second living organism in a food chain is generally...
a) herbivore
b) carnivore
c) detrivore
d) a photoautotroph
3. Plants use nitrogen to grow and are generally helped by cycling N from the air to the land by bacteria in a process called...
a) nitrogen fixation
b) denitrification
c) decomposition
d) emmigration
Answer:
1-a 2-a 3-a
1. The first living organism in a food chain is
a) producers
b) primary consumers
c) heterotroph
d) chemosynthesizer
2. The second living organism in a food chain is generally...
a) herbivore
b) carnivore
c) detrivore
d) a photoautotroph
3. Plants use nitrogen to grow and are generally helped by cycling N from the air to the land by bacteria in a process called...
a) nitrogen fixation
b) denitrification
c) decomposition
d) emmigration
Which of the following characteristics of enzymes is NOT correct?
A)The substrate is the substance upon which the enzyme acts.
B)The induced-fit or lock and key model describes how enzymes work.
C)An enzyme is unchanged as a result of a reaction.
D)The efficiency of an enzyme is not affected by temperature.
The statement that represents an incorrect characteristic of enzymes is as follows;
The efficiency of an enzyme is not affected by temperature.Thus, the correct option for this question is D.
What are enzymes?Enzymes may be defined as the type of biocatalysts that significantly increase the rate of a chemical reaction without being changed in the overall process. It is thought that all cellular reactions and processes are mediated by enzymes.
Enzymes include a number of characteristics. Some of them are most of the enzymes are proteins. They are highly specific. They exhibit enormous catalytic power.
The substrate is the substance upon which the enzyme acts. The induced-fit or lock-and-key model describes how enzymes work. The temperature and pH directly affect the efficiency of an enzyme.
Therefore, the correct option for this question is D.
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If a woman has had a intercourse, and she missed a menstrual period by more than 14 days, she probably is pregnant. True or False
Answer:
true
Explanation:
Answer:
True.
Explanation:
Periods can come late, but even so, if the woman is an adult and has mostly predicable and a regular schedule that can be tracked, then the period could be late for at least 7-9 days MAX. 14 days would be pushing it.
Organisms developed _________ that provided its own food source.
Answer:
autotrophic
Explanation:
An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers. Plants are the most familiar type of autotroph, but there are many different kinds of autotrophic organisms.
Answer:
Explanation:
An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals.
What is the theory of natural selection, and why does it occur in an organism?
Answer:
Natural Selection is survival of the fittest aka Darwinism. It basically states that the strongest survive and the weakest don't. Maybe it's through food shortages, bad weather, or predators. It occurs in an organism for population control. If there is too big of a population, then there will be a recourse drought and natural selection will do its thing again.
The__ links the brain to the rest of the body.
A. Heart
B. Brain
C. Spinal cord
D. Nervous system
Answer:
The brain
Explanation:
The brain stem connects the brain with the spinal cord.
Answer:
C - the spinal cord
Explanation:
the cord is connected to the brain and travles down the body connecting itself
5. A system of membranes and tubes that create
passages through which materials can pass? |
Answer:
paper or glass
Explanation:
for they use needles to get and they transfer it to paper for studying
Answer: paper
Explanation:
Urine is produced by the body to rid itself of wastes the normal chemical composition of urine is mostly water but it also includes nitrogenous molecules creatine and other metabolic waste units urine is a solution that can be greater than 95% of water what property of water makes watee so helpful in ridding the body of waste
A.water cohesive forces create surface tension upon its surface
B. Water is a versatile solvent
C. Water is expands upon freezing
D.water has a high specific heat
ANSWER FAST PLSSS
Answer:
B. Water is a versatile solvent
Explanation:
Water is said to possess certain properties that gives it its unique attribute. These properties make it a vital component of life as it makes certain phenomena possible. According to this question, water, which makes up majority of urine content, aids the excretion of certain wastes such as nitrogenous molecules from the body.
Water is able to aid in this excretory function due to its VERSATILITY AS A SOLVENT. Water is said to dissolve more substances than any other solvent. This allows it to transport dissolved substances including waste products out of the body.
What are the reactions of the first stage of photosynthesis called?
____-_________
Answer:
light-dependent reactions or light reactions
What is the function of the respiratory system?
O to break down food
O to transport materials in the body
O to breathe
O to rid the body of waste
I will Mark brainliest if u get it right
Answer:
my guess is C- to breathe...but the respiratory system also gets rid of waste, but mainly to help a person breathe
Explanation:
hope this helps
The function of the respiratory system is to break down food.
RESPIRATORY SYSTEM:Respiratory system is one of the system of living organisms that consists of organs, which functions in exchange of gases in and out of cells. The major organ of the respiratory system is the lungs. However, respiration majorly deals the breakdown of food molecules in the cells. These breakdown of food molecules release energy in form of ATP, which is needed to perform cellular activities. Therefore, the function of the respiratory system is to break down food.Learn more about respiratory system: https://brainly.com/question/3305440?referrer=searchResults
Give two names for a hydrogen atom with a missing electron
Answer:
Cation,anion
Explanation:
Darwin's experiments are just one way to study phototropism. A student wants to investigate the effects of phototropism in bean plants. She places a light source directly above one plant, at a forty‐five degree angle to another, and at a ninety‐degree angle from the third.
What is her independent variable?
What is a hypothesis she might write for her experiment?
Answer:
Her independent variable is the light source and her hypothesis is what YOU think might happen
Answer:
The independent variable is what is being changed or altered in the experiment (light position), the dependant variable is what is altered or changed by the independent variable (plant).
Explanation:
Consider what is being changed in this experiment to investigate the effects? The plant itself is not changed by the experiment but the positioning of the light source is. That is your independent variable. The plant may change as a result of the independent variable but isn't being altered or changed as part of the method (dependent).
What is a hypothesis she might write?
Consider a hypothesis as a prediction. Researchers come up with their hypothesis based on the information they already know. So to write your hypothesis think about what you already know about phototropism. What do you think will happen to the plant in relation to the positioning of the lamp? Will the plant not move? Will it bend or move to face the lamp?
Hope this helps.
PLEASE HELP -- Imagine protein X, destined to span the plasma membrane. Assume that the mRNA carrying the genetic message for protein X has already been translated by ribosomes in a cell culture. If you fractionate the cells, in which fraction would you find protein X? Explain by describing its transit through the cell.
Answer:
Protein X would be ultimately present in the subcellular fraction containing membrane fragments
Explanation:
It is possible to trace the synthesis and transport of a membrane protein by the following steps:
1- The amino acids of the membrane protein are joined together in the ribosome to form a polypeptide chain (in this case, the protein X).
2- A signal sequence of the growing polypeptide produces the binding of the ribosome to the membrane of the endoplasmic reticulum (ER) and the insertion of this polypeptide chain into the ER.
3-The protein is released into a vesicle from the ER to be exported to the Golgi complex.
4- The membrane protein is transported by the Golgi complex to the cell membrane by the formation of a secretory vesicle that fuses with the plasma membrane, thus being finally embedded in the lipid bilayer.
Protein X should be present in the subcellular fraction that comprise of membrane fragments
The fraction that should be measured the protein X:
Here the synthesis should be traced and the membrane protein transport should be applied by using the following steps:
Here the amino acids of the membrane protein should be connected together so that the polypeptide chain should be created. A signal sequence with respect to the polypeptide should be grown that generated the ribosome binding. Now the protein should be relased into the vesicle. At last, the protein of the membrane should be transported to the cell membrane.Learn more about cell here: https://brainly.com/question/13250146
A beaker contains 0.64 L of water. What is the volume in milliliters?
0.64 L in milliliters is 640 milliliters.
During transcription what type of molecule is formed?
A. RNA
B. mRNA
C. tRNA
D. rRNA
Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). DNA safely and stably stores genetic material in the nuclei of cells as a reference, or template
Answer:
The answer is B mRNA
Explanation:
Match these items.
1. kg measurement of area
2. cm2 measurement of mass
3. L measurement of volume
4. m measurement of length
Answer:
1. length is m (meters)
2. Mass is kg (kilograms)
3. area is cm^2
4.volume is L (liters)
For followers of Confucianism, which statement is the most accurate?
*People are naturally selfish and evil.
*Virtue and education are essential.
*Good laws demand strong laws and government.
*Ideas must be controlled by the government.
Answer: I would say virtue and education are essential
Explanation: I read tales of Confucius
Answer:
B. Virtue and education are essential.
Explanation:
have a great day peeps :)
How do you determine the amount of electrons and protons?
Answer:
The number of protons in the nucleus of an atom is equal to the atomic number
the number of electrons in a neutral atom is equal to the number of protons
Explanation:
Answer:
For both protons and electrons, you need to use the atomic number.
please help asap i will mark brainliest
Answer:
a
Explanation:
HELP
Which bodily system is responsible for releasing growth and other hormones?
Answer:The endocrine system
Explanation:
The endocrine system includes all of the glands of the body and the hormones produced by those glands. The glands are controlled directly by stimulation from the nervous system as well as by chemical receptors in the blood and hormones produced by other glands
I NEED THIS ASAP PLZ / I WILL NAME YOU BRAINLIEST PLEASEEE!! What might happen to the Burmese python population over time as it reaches or surpasses its carrying capacity in South Florida? How might other organisms in the ecosystem be affected? What might happen to the population sizes of various types of organisms in the Everglades?
Answer:
As the Burmese python surpasses its carrying capacity in South Florida, the overpopulation of it leaves less resources for each python, and other organisms. Predators may have way too many pythons, and not be able to keep the balance, and prey might be over hunted or eaten. The population sizes may decrease due to the over-population of the pythons.
Explanation:
If there are ever too many of any ORGANISM in a ecosystem, the balance is sure to be ruined.
Hope this helps!
Which correctly lists three forms of frozen water?
O dew, frost, rain
O frost, hail, sleet
O hail, rain, sleet
Orain, dew, frost
Answer:
b
Explanation:
The option that correctly lists three forms of frozen water is "frost, hail, sleet". Therefore, option (B) is correct.
What is frozen water?Frost is created when water vapor condenses and freezes onto a surface, like the ground or a window.
Hail is produced when powerful updrafts in thunderstorms carry raindrops high enough that they freeze into ice, forming large balls of ice that fall to the ground. This process results in the formation of hail.
Sleet is created when raindrops pass through a layer of cold air close to the ground. This causes the raindrops to freeze into small ice pellets before they reach the ground's surface.
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Which of the following best describes how the structure of the fluid mosaic model of the cell membrane controls the movement of substances in and out of the cell? (3 points)
Answer: The fluid mosaic model describes the structure of the plasma membrane as a mosaic of components —including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character. Plasma membranes range from 5 to 10 nm in thickness.
Explanation:
The option that describes the fluid mosaic model of the plasma membrane is a lipid bilayer with protein molecules dispersed within it.
It should be noted that the fluid mosaic model of the plasma membrane was proposed by Singer and Nicholson to explain the structure of the plasma membrane.
The plasma membrane is known as a fluid model because it has several types of molecules that float along the lipids. The fluid mosaic model of the plasma membrane is made up of two layers of lipid molecules where there are protein molecules dispersed within.
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Compounds that contain carbon are called
Answer:
I think organic compounds
Explanation:
Which of the following changes demonstrates a chemical property? *
O A substance breaks in half
A substance combusts (burns)
O A hammer bounces off a substance
O A substance floats in water

Answer:
The correct answer is B. Combustion is a chemical change. When a substance is burned, it forms new substances. Therefore, combustibility is a chemical property because it can only be observed when a substance undergoes a chemical change.
Explanation:
Hope that helps!
Answer:
The answer would be "A substance combusts (burns)".
Explanation
All of the other options are basic physical changes that don't alter the substance on a molecular level, whereas burning a substance permanently changes the molecular makeup.
Cardiac muscular tissue and its function
Answer:
Yes That Is True!
Explanation:
Answer:
Cardiac muscle tissue works to keep your heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control. It does this through specialized cells called pacemaker cells. These control the contractions of your heart.
I hope it help you,
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Which organism is an animal-like protist?
cilia
dinoflagellates
amoeba
truffle
can you help me with this??
Answer:
Its between the 3rd and fourth but i think its the 3rd
Explanation:
Please help! I am so confused, please just help me understand this thing! I'm desperate
Answer:
i dont even know
Explanation:
bc its to hard to understand
What does the plant use the glucose for
Answer:
energy to live should be right