Answer:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
Explanation:
This is what the cell membrane does so if any of these are an answer choice then use process of elimination to figure out which one is correct
Answer:
its does not provide energy
Explanation:
explain why people sleep under mosquito nets in some parts of the world
Answer:
A mosquito net is a type of meshed curtain that is circumferentially draped over a bed or a sleeping area, to offer the sleeper barrier protection against bites and stings from mosquitos, flies, and other pest insects, and thus against the diseases they may carry
A botanist discovers a new species of plant in a tropical rainforest. Its characteristics include flagellated sperm, presence of xylem for conducting water, independent gametophyte and sporophyte stages, no seeds. This plant is most likely a
Answer:
Fern
Explanation:
The plant discovered by the botanist is most likely a fern.
Ferns are referred to as seedless vascular plants. They do not produce seeds and they possess vascular tissues in the names of xylem and phloem. The xylem conducts water/mineral salts from the roots to the body of the plant while the phloem distributes manufactured foods from their sources to other parts of the plant.
Ferns also have independent gametophyte and sporophyte stages. The sporophyte produces haploid spores through meiosis which then germinates to the gametophyte. The gametophyte produces male and female gametes - antheridium and archegonium. The antheridium is motile and swims to meet the immotile archegonium during fertilization to produce the zygote which then divides mitotically to give the sporophyte.
3. While looking through a drawer a person touches a sharp object and
quickly moves their hand away. Which body systems have worked
together to move the hand away from the sharp object? *
A-The immune system senses pathogens from the sharp object and sends a message
to the nervous system to move the hand away.
B-The nervous system senses pain from the sharp object and sends a message to the
skeletal system to move the hand away.
C-The nervous system senses pain from the sharp object and sends a message to the
muscular system to move the hand away.
D-The immune system senses pathogens from the sharp object and sends a message
to the muscular system to move the hand away.
Answer: the answer is obviously C
Explanation: the nervous system is the main system to deal with pain so that narows it down to B or C so then you see that b talks about sending signals to the skeletal system, well, thats not posible without the muscular system, which literally leads you to C
1. "For oxygen to enter the blood, how must the concentration of O2 in the alveoli compare to O2 in the blood?" 2. "For carbon dioxide to leave the blood and enter the alveoli, how must the concentration of CO2 in the blood compare to CO2 in the alveoli?" 3. "When diffusion has reached equil- ibrium, we say that the net movement of the molecules is zero. Does movement stop? Explain."
Answer:
1. Concentration of O2 in the alveoli must be more than that of the blood
2. Concentration of CO2 in the blood must be more than that of the alveoli
3. Movement does not stop (find the explanation below).
Explanation:
Gaseous exchange i.e. taking in of O2 and taking out of CO2, takes place in the alveoli/air sac of the lungs. However, the movement in and out of O2 and CO2 from the alveoli into the bloodstream and vice versa follows the principles of SIMPLE DIFFUSION. Diffusion is the process whereby substances move from a region of high concentration to a region of low concentration until they are evenly distributed. Based on this, the following will occur:
1. The concentration of O2 in the alveoli must be more than that in the blood in order for oxygen to enter the blood via diffusion.
2. The concentration of CO2 in the blood must be more than that in the alveoli in order for carbon dioxide to leave the blood and enter the alveoli via diffusion.
3. When the rate of diffusion is at equilibrium i.e. no net movement is occuring die to equal concentration of the substance on both sides, the substances begin to move in the opposite direction at an equal rate. Note that, at equilibrium, MOVEMENT DOES NOT STOP, however, there is an equal rate of movement.
a _____ is an organism that cannot produce its own food, so it must obtain its energy by eating or other organisms
Answer: Heterotrophs
Explanation: Heterotrophs, also known as other-feeders, can't capture light or chemical energy to make their own food out of carbon dioxide. Humans are heterotrophs. Instead, heterotrophs get organic molecules by eating other organisms or their byproducts. Animals, fungi, and many bacteria are heterotrophs.
Answer:
Heterotrophs
Explanation:
Heterotrophs, also known as other-feeders, can't capture light or chemical energy to make their own food out of carbon dioxide. Humans are heterotrophs. Instead, heterotrophs get organic molecules by eating other organisms or their byproducts. Animals, fungi, and many bacteria are heterotrophs.
Autotrophs such as plants do that
what are the two inheritance patterns of blood type
1-A rock that contains evidence of past animal or plant life is called a
2- Prehistoric
have been discovered in permafrost in Alaska and Siberia.
3 - Hardened tree sap can preserve animals in a substance called
4 - Fossils can be created by replacement using minerals such as?
Solid
5-A
shows the original shape of the plant or animal.
6 - A cast represents a
version of the original plant or animal.
7 - Trails, tracks and burrows are examples of
fossils
8- Some of the oldest fossils on earth are from ancient
crawling on the seafloor.
:: Fossils
:: Amber
:: Silica
:: Woolly Mammoth
Pyrite
:: Trace
Calcite
: Mold
:: Worms
1
Answer:
1. A rock that contains evidence of past animal or plant life is called a fossil.
2. Prehistoric Woolly Mammoth have been discovered in permafrost in Alaska and Siberia.
3. Hardened tree sap can preserve animals in a substance called amber.
4. Fossils can be created by replacement using minerals such as silica, calcite, pyrite.
5. A mold shows the original shape of the plant or animal.
6. A cast represents a solid version of the original plant or animal.
7. Trails, tracks and burrows are examples of trace fossils.
8. Some of the oldest fossils on earth are from ancient worms crawling on the seafloor.
Explanation:
Fossils are known to be the remains of plants and animals which have been preserved and kept in rock. They are usually a shell, skeleton or plant fiber that has been buried. Over time, they turned into rock.
Fossil amber are known to be fossil insects that are preserved in hardened tree sap. These insects and some small animal or plant that are found in these hardened tree sap were trapped in the tree.
Woolly Mammoth is known to be a closest extant relative to the Asian elephant. The appearance and behaviour of woolly mammoth are among the best studied in Siberia and Alaska.
Why does the cell complete DNA replication?
Answer:
The cell must replicated DNA because when the cell divides, the daughter cells must have identical copies of DNA. DNA replication occurs in the S phase during interphase of the cell cycle.
The jellylike substance that holds everything in place inside all cells is called the....
Answer:
Cytoplasm
Explanation:
Answer:
Cytoplasm
Explanation:
Cytoplasm is the semi fluid gel like substance of a cell that is present within the cellular membranes and surrounds the nucleus.
(I need help on math so pls lmk if your willing to help)
What are the functions of carbohydrates? Select all that apply.
A Storing energy
UB Storing information
C Structural support
D Intercellular signaling
OE Building proteins
OF Aiding in digestion
The functions of Carbonhydrates include :
Storing energyStoring energyBuilding proteinsCarbonhydrates refers to a one of the six classes of nutrients which can be derived from food. They are common in food containing Starch including rice, corn and so on.
Carbonhydrates main function is to provide the body with energy. Other functions include sparing the use of proteins and the breakdown of fat and the regulation of body glucose.
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A single-cell organism that reproduces asexually through mitosis contains 24 chromosomes. When the organism reproduces, how many chromosomes will there be in the resulting daughter cells?
Answer: there will be 24 daughter cells I believe.
Explanation:
Radish color is controlled by a gene that exhibits incomplete dominance; purebred red radishes (RR) crossed with purebred white radishes (WW) make purple radishes (RW). What are the chances of producing purple offspring when you cross two purple parents?
Answer:
1/2
Explanation:
This question involves a single Gene coding for fruit color in radish plants. The gene exhibits incomplete dominance where the allele for red radish (R) and the allele for white radish (W) forms a hybrid with a purple radish (RW).
If a purebred red radish (RR) is crossed with purebred white radishes (WW), purple radishes (RW) will be formed. However, when the purple radishes are self-crossed i.e. RW × RW, the following gametes will be produced- R and W.
Using these gametes in a punnet square (see attached image), the following offsprings will be produced in the following proportions:
RR - red = 1/4
RW - purple = 2/4 or 1/2
WW - white = 1/4
Hence, the chances of producing purple offspring when you cross two purple parents is 1/2.
What is meant by the term Reference Front?
Explanation:
The RF value is defined as the ratio of the eistance moved by the solute(i.e the day or pigment under test)and the distance moved by the solvent (known as solvent front)along the paper,where both distance are measured from the common origin or application baseline,that is the point where the sample is
The study of how traits are passed from parent to offspring.
A.
Inheritance
B.
Gene Expression
C.
Translation
D.
Genetics
Answer:
Genetics
Explanation:
Genetics is the study of how traits are passed down to generations, like from parent to offspring.
Gregor Mendel is known as the father of genetics and was one of the first to study how traits were passed down across generations.
So, D is the correct answer.
i want to play a game, like guess what line from the tv show or movie it came from
(omg im so bad at explaining things so if u didn’t understand anyways)
on what tv show or movie did this come from “MOM GET OFF THE PHONE”
it’s probably easy but okay.
BESTFRIEND WHAT IS THISSSSSS????
NOBODY UNDERSTANDS WHAT YOUR TRYING TO SAYYYY
7. Write the chemical formula for photosynthesis: using chemical symbols AND using words.
Answer:
The photosynthesis equation is written as:
Explanation:
6H2O + 6CO2 → C6H12O6 + 6O2.
In words it is written as:
the reaction of six water molecules with six carbon dioxide molecules yielding one glucose molecule and six oxygen molecules.
Hope this helped!
Before conducting an experiment, a scientist needs to review _____.
Answer:
post a testable question
state hypothesis
Answer:
make sure they have a testable question
Explanation:
Normal cells become cancer cells when
1. regulation of cell growth and division is lost.
2.All of the above
3.cells do not respond normally to control mechanisms.
4.cells continue to divide without passing through G1.
Answer:
Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.
Explanation:
this is what i found
hope it helps
Bats,humans,and chimpanzees have similar structures to their front limbs. what is an example of this?
Answer:
Homologous traits.
Explanation:
I definately do not believe in the idea of homologous OR analogous traits, however, I do want to help you out and I can tell you what your textbook says: A homologous trait is any characteristic which is derived by evolution from a common ancestor.
In the 1970s, public opinion favored cleaning up the environment. Since the 1980s, some members of Congress and industry leaders have fought against environmental laws that regulate the amount of pollution that can be added to the environment. Are they working in the best interests of the public or of corporations?
Answer:
They are working in the best interests of corporations
Explanation:
Corporations and industries are responsible for a large percentage of environmental pollution being witnessed in several regions of the world. The pollutions have negative consequences for the environment and the organisms living in it, including humans. Hence, formulating laws to regulate the amount of pollution that can be added to the environment is in the best interests of the public. Any person that fights against these laws is likely working in the interests of industries and corporations and not the public in its entirety.
Jimmy is planning on making a new deck in his backyard this spring. 1. He must wait until the ground reaches a temperature of 6 degrees Celsius before he can begin building. Jimmy knows that, on average, the temperature increases 2 degrees Celsius per week in the spring. If the temperature is -12 now, how long must Jimmy wait before he can begin work?
Answer:
9 days
Explanation:
how do I take a picture of a chart and then type the question under it for someone to answer?
What is the name of the process shown?
?
A)
mitosis
B)
meiosis
C) glycolysis
D) genetic mapping
Answer:
D hope this can help
PLEASE I NEED HELP ASAP, I WILL GIVE BRAINLIEST
Which resource is sometimes unpredictable in terms of energy production?
coal
wood
gasoline
natural gas
Answer:
Natural gas
Explanation:
Answer:
The answer is Natural gas
Explanation:
Why does diuron cause coral to bleach
Simple answer:
When corals are stressed by changes in conditions such as temperature, light, or nutrients, they expel the symbiotic algae living in their tissues, causing them to turn completely white. Warmer water temperatures can result in coral bleaching. ... This is called coral bleaching. When a coral bleaches, it is not dead.
More in depth explanation:
Exposure to higher (100 and 1000 µg l-1) diuron concentrations for 96 h caused a reduction in ΔF/Fm¹, the ratio variable to maximal fluorescence (Fv/Fm), a significant loss of symbiotic dinoflagellates and pronounced tissue retraction, causing the corals to pale or bleach.
Hope this helped :)
Hydrogen peroxide naturally breaks down into oxygen and water over time. When exposed to the enzyme catalase, hydrogen peroxide is rapidly converted into oxygen and water.
What feature of catalase most likely is responsible for the change in the rate of conversion of hydrogen peroxide into water and oxygen?
A, Catalase speeds up the conversion of hydrogen peroxide into water and oxygen by decreasing the reaction's activation energy.
B, Catalase bonds permanently with the reactants causing hydrogen peroxide to rapidly break down by increasing the activation energy.
C ,Catalase has a flexible structure that allows it to bind and convert any small hydrogen containing compound into water and oxygen.
D, Catalase remains intact, so small amounts of it convert large amounts of hydrogen peroxide into water and oxygen immediately.
Answer:
Catalase is an enzyme in the liver that breaks down harmful hydrogen peroxide into oxygen and water. When this reaction occurs, oxygen gas bubbles escape and create foam. Completely disinfect any surface that the raw liver touches during this activit.
Explanation:
hope this helps you a little have a great day sir/mam
Catalase speeds up the conversion of hydrogen peroxide into water and oxygen by decreasing the reaction's activation energy. Thus option A is correct.
What is the function of catalase ?Catalase is a common enzyme present in all living organisms.
These are tetramer molecule consisting of four polypeptide chains, each of these chains are over 500 amino acids.
In mammal it is found in liver and contains four iron-containing heme groups that allow the enzyme to react with hydrogen peroxide.
In mammalian cell, Catalase involve in decomposition of most toxic substance called hydrogen peroxide into less toxic products like water and oxygen.
It protect the cell from oxidative damage by reactive oxygen species.
The optimum pH and optimum temperature for the activity of this enzyme ranges from four and eleven depending on the species.
Thus option A is correct.
Learn more about catalase, here:
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Which genre uses narrative techniques to recount personal experience and development?
Answer:
A memoir.
Explanation:
A memoir is a biography written by someone that includes their personal experiences and knowledge. It's also kind of like a narrative.
Hope this helps! Have a nice day!
what do non metals do with their valence electrons?
6. What are biodegradable materials
a. These are materials that can be decomposed.
b. These are materials that do not decomposed.
c. These are harmful materials.
d. These are materials that both decomposed and not dec
Answer:
A
Explanation:
These are the materials that can be decomposed
Would a greater or less amount of exposed surface area absorb thermal energy faster? Why? Give an example.
Answer:
Explanation:
A greater amount of surface area exposed will absorb thermal energy faster compared to a surface with a lesser exposed area.
Thermal energy is a form of kinetic energy in which the molecules of a medium increases their velocity.
In a large area with high surface are exposed, the molecules are spread out openly without obstructing each other. This will enable a faster thermal conduction through a system. A small exposed surface area inhibits thermal conduction. Solar panels are designed to expose more surface area to abstract more thermal energy.