Answer:
The mechanisms of transport across the cell membrane are as follow: 1- simple diffusion, 2- facilitated diffusion, 3- primary active transport and 4-secondary active transport
Explanation:
The cell membrane is a selectively permeable structure capable of transporting substances by different mechanisms. Simple diffusion is a type of passive transport (i.e. does not require energy) where non-polar molecules (e.g. O2, CO2) pass across the membrane by a process that does not require energy from the cell. Facilitated diffusion is another type of passive transport where larger polar molecules (e.g., glucose and amino acids) pass across the membrane by using specific transmembrane integral proteins. On the other hand, primary active transport is a type of active transport that uses chemical energy (e.g., ATP) to move substances such as metal ions (Na+, K+, Ca2+) across the cell membrane against their concentration gradient. Finally, secondary active transport is another type of active transport where transporter proteins are used to couple the movement of ions (e.g., H+ protons) down their electrochemical gradient to the transport of another ions/solutes against their concentration/ electrochemical gradient.
What are the importance of familiarizing the functions of carpentry tools and equipment
plss paki sagot
Answer:
Each tool is precisely designed for a specific purpose, so choosing the correct tool will also decrease the amount of effort required to get a job done right without causing damage to either the equipment or the surface
Which of the following is an appropriate hypothesis to answer the question, why are leaves green?
A: To study the coloring of leaves, scientists grew 250 maple trees within a greenhouse over the course of six months and analyzed the structure of over 1,000 leaves.
B: Leaves are green due to the presence of chlorophyll, a pigmented compound found within the leaves.
C: Based upon the given data, which spans 25 years of research, scientists determined that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.
D: Using the work of previous scientists and adding new data to their information, scientists have found that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.
PLEASE HELP FAST !!!!!!!!!!!!!!!!!
Answer:D
Explanation:
Answer:
D. Using the work of previous scientists and adding new data to their information, scientists have found that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.
Explanation:
summary of the electron transport chain
**Urgent** Will mark brainliest!
Answer:
For the first box (top left one), it is AA
For the second box (top right one), it is Aa
For the third one (bottom left one), it is aA
For the fourth one (bottom right one), it is aa
This one above ^^^ is the top line of the punnet square (the small line)
A = free-hanging earlobes
a = attached earlobes
For the first box (top left one), it is free-hanging earlobes (both "A"s are dominants, and the dominant is greater than the recessive one).
For the second box (top right one), it is free-hanging earlobes (there is at least one dominant A so it will be greater than the other "a" although there is a chance for it to be an attached earlobe, but in this case, it isn't)
For the third one (bottom left one), it is free-hanging earlobes (again, there is at least one dominant A so it will be greater than the other "a" even though, there is a chance for it to be an attached earlobe, but in this case, it isn't)
For the fourth one (bottom right one), it is attached earlobes (both "a"s are recessive, there is not one dominant "a" which means that it will be an attached earlobe".
This one above is ^^^ is for the second line in the punnet square (the longest line) P.S you dont have to write the explanation you can just write if it's an attached earlobe or a free-hanging one
The ratio will be 75% to 25%. The 75% will be the offsprings inheriting the free-hanging earlobes, and the 25% will be the offsprings inheriting the attached earlobe. It is most likely that the offspring will inherit the trait for free-hanging earlobe since it is the dominant allele there is.
(So people wont have to answer just to get the points that you are giving and answering wrong)
can someone please help me ASAP
Answer:
Explanation:
4
The change in temperature during the summer is due to. A. the sun being closer to earth.
B. the earth being tilted towards the sun and is receiving more direct sunlight. C. the earth being tilted away from the sun and distributing the sunlight. D. the earth being on the warmer side of the sun.
help me asap i’ll mark brainliest! pls and thanks
Answer:
Winter
Explanation:
summer is going to start in june. Winter start from December to February.
A vector covers what
what are the defense mechanisms of the human body
Explanation:
The human body has three primary lines of defense to fight against foreign invaders, including viruses, bacteria, and fungi. The immune system's three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses.
The human body possesses several defense mechanisms to protect itself against pathogens (disease-causing microorganisms) and other harmful substances such as innate and adaptive immune system.
Innate immunity is the body's first line of defense and is present from birth. It provides immediate protection against a wide range of pathogens. Adaptive immunity is a specific defense mechanism that develops over time in response to specific pathogens. It provides long-lasting immunity and has the ability to recognize and remember specific pathogens. Both innate and adaptive immunity work together to provide a comprehensive defense against pathogens. Innate immunity provides rapid, general protection, while adaptive immunity offers specific, targeted responses. The coordination between these defense mechanisms helps the body combat infections and maintain overall health.
Learn more about the human defense mechanism here.
https://brainly.com/question/30703605
#SPJ2
what is the random distribution of chromosomes during meiosis called
genetic variation
recombination
crossing over
independent assortment
Answer:
It is : independent assortment
Explanation:
Explains:
When cells divide during meiosis, homologous chromosomes are randomly distributed during anaphase I, separating and segregating independently of each other. This is called independent assortment. It results in gametes that have unique combinations of chromosomes.
What is Mendel famous for doing? What did he want to learn from this experiment?
Answer:
Mendel discovered the basic principles of heredity through experiments in his garden.
Explanation:
His experiments showed that the inheritance of certain traits in pea plants follows particular patterns, subsequently becoming the foundation of modern genetics and leading to the study of heredity.
Answer:
he bred pea plants
Explanation:
Mendel bred pea plants and discovered that there are multiple alleles for every gene. some are dominant and others are recessive.
Song suggestions??? lmk
any song written by lil peep, some great starters are beamer boy and star shopping, I personally love Haunt You, Give You The Moon, and Nuts.
How knowledge of external anatomy is helpful for animal owners and producers?
Answer: So that they know the parts that they can sell, and how to process the animal
Explanation:
Describe one important piece of machinery in plant cells, and how that machinery helps keep plant cells alive. Pleas help. This is a school assignment.
(This is 7th grade science).
Answer:
Cytoplasm
Explanation:
The Cytoplasm is a Jelly-like substance, where chemical reactions take place.
I have a question.... my teacher today in biology said " you think you are moving your hand by yourself, but it's actually your brain sending commands to your muscles so they can move." So I wondered.. is my brain sending commands so I can think, or am I thinking whenever I have a desire to? (Not a trick question; My friend thinks this is a trick question lol).
Answer:
To answer this question you have to think, "What am I really" to answer that you are your brain. When you say "am I thinking whenever I have a desire to" your brain is the "I." You think when your brain wants you to think. It rules everything that happens. It creates thoughts and commands all parts of the body.
Explanation:
In each drawing, there are lines between each atom and each molecule. What do you think the lines between atoms represent? The lines between molecules?
Answer:
Atoms are the smallest units of matter that still retain the fundamental chemical properties of an element. Much of the study of chemistry, however, involves looking at what happens when atoms combine with other atoms to form compounds. A compound is a distinct group of atoms held together by chemical bonds. Just as the structure of the atom is held together by the electrostatic attraction between the positively charged nucleus and the negatively charged electrons surrounding it, the stability within chemical bonds is also due to electrostatic attractions. To illustrate further, consider the two major types of chemical bonds: covalent bonds and ionic bonds. In covalent bonds, two atoms share pairs of electrons, while in ionic bonds, electrons are fully transferred between two atoms so that ions are formed. Let’s consider both types of bonds in detail.
Explanation:
Answer:Each straight line segment represents a bond, the ends and intersections of the lines are carbon atoms, and the correct number of hydrogens is calculated from the tetravalency of carbon. Non-bonding valence shell electrons are omitted in these formulas.Each line represents a single covalent bond (two shared electrons), so double lines represent a double covalent bond (four shared electrons). Covalent bonds are usually found in atoms that have at least two, and usually less than seven, electrons in their outermost energy shell, but this is NOT a hard and fast rule.
Explanation:
How do different types of forces affect objects?
ITS 58 POINTS!
Answer:
Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving. Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity. Remember that acceleration is a change in velocity.
Explanation:
Mendel found common ratios of traits among the offspring.
Is this true or false?
Answer:
Explanation:
Although Mendel's principle of independent assortment states that alleles of different ... Sometimes, alleles of certain genes are inherited together, and they do not ... and it generally describes an inheritance pattern in which two genes located in ... In this case, the ratio of phenotypes observed among the offspring is 9
How will you find the valency of chlorine, sulphur and magnesium
Answer:
Explanation:
ANSWER
If the number of electrons in the outermost shell of an atom of an element is less than or equal to 4, then the valency of an element is equal to the number of electrons in the outermost shell.
If it is greater than 4 then, the valance is determined by subtracting the outermost shell of electrons from 8.
The electrons in Cl, S, and Mg are 2,8,7 ; 2,8,6 ; 2,8,2
Hence the valency of Cl, S, and Mg are 1, 2, 2 respectively.
Answer:
Chlorine has 7 valence electrons
Magnesium has 2 valence electrons
Sulphur has 6 Valence electrons
Explanation:
We can find how many valence electrons by looking at the periodic table. For instance chlorine is a halogen and therefore has 7 valence electrons as it is in group 17. Magnesium is in group 2 so therefore has 2 valence electrons.
Sulphur is in group 16 and therefore has 6 valence electrons.
If the group has double digits I.e 16 like sulphur we only look at the second digit i.e. 6 as we can't have more than 8 valence electrons.
What could happen to a plant if it’s central vacuoles shrunk due to water loss
Answer: More waste would enter the cells, and the plant would maintain water because " vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance."
What is one trait that could be used to separate these albatrosses into two groups of two birds each?
The correct answer to this open question is the following.
You did not attach the options for this question. However, we can answer the following.
Although there are no pictures of the Albatross, we can say that one trait that could be used to separate these albatrosses into two groups of two birds each is "a large group of solid black feathers vs. black and grey patterned feathers."
If someone ask you what are the birds with larger wings, you probably would answer "the Bald Eagle," Or any other kind of eagle. Maybe the Southamerican Condor. And those answers are incorrect. The correct answer: the Albatross.
This is a carnivore bird which wingspan varies from 6.5 to 11 to 11 feet, Its average weight is 22 pounds. These impressive birds can use their long wings to fly over the seas for miles and miles, without taking a rest.
During cellular respiration every living thing in this food web uses gas and releases back into the environment
Answer:
B) oxygen:carbon dioxide, because of the process of Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining processes and discarding, as waste products, carbon dioxide and water.
Explanation:
What is an adaptation another species have developed to resist the toxic sting of a nematocyst?
Answer:
The mouth covered by chitin and intracellular granules of chitin (i.e. spindles) in nudibranchs
Explanation:
Nudibranchs are marine gastropod molluscs (Opisthobranchia, Mollusca). These organisms are carnivorous, so they feed on sponges, coral, anemones, hydroids, fish eggs, etc. On the other hand, cnidarians have specialized cells called cnidoblasts or cnidocytes that contain nematocysts made up of toxins that serve as a defense mechanism. Nematocysts are found in many species of Cnidarians such as, for example, in the tentacles of sea anemones. Interestingly, nudibranchs have developed some adaptations for feeding on these species. In the first place, nudibranchs have the mouth covered by a substance named chitin that allows them to chomp and swallow anemone tentacles. Second, they (nudibranchs) also have intracellular granules of chitin (i.e. spindles) in the digestive system that function as biological sandbags which maintain nematocyst toxins away from sensitive body parts.
The mucus coat of clownfish protects the fish from sea anemone's sting which is an adaptation clownfish developed.
What is Nematocysts?Nematocysts are cells found in which is use for locomotion and for defence and capturing prey.
Nematocysts contain coiled threadswhich is like hairlike projections called which are sensitive to touch and can penetrate the body ofprey.that may bear barbs. Nematocysts is found in Sea anemone, Hydra and so on and it is use to capture prey.The clown fish have mucus coat which prevents nematocysts from penetrating through it and hence ensures it's defence from been attacked or captured as prey by Sea anemone.Therefore, The mucus coat of clownfish protects the fish from sea anemone's sting which is an adaptation clownfish developed
For more details on nematocysts check the link below.
https://brainly.com/question/984744
Which quantities define momentum?
A. Mass and speed
B. Mass and velocity
C. Mass and acceleration
D. Mass and force
The quantities that significantly define the momentum are known as Mass and velocity. Thus, the correct option for this question is B.
What is Momentum?Momentum may be defined as a type of physical property that remarkably describes the motion of any moving object. It is a type of vector quantity as it possesses both magnitude and direction. It may be generally characterized as the product of mass and velocity.
According to the context of this question, the momentum of any object may be calculated as follows:
Momentum, P = M × V, where M = mass of an object and v = velocity of an object.The unit of momentum is Newton-second (N-s) or kg m/s.
Therefore, the quantities that significantly define the momentum are known as Mass and velocity. Thus, the correct option for this question is B.
To learn more about Momentum, refer to the link:
https://brainly.com/question/1042017
#SPJ5
state two functions performed by bile juice
HELP ASAP! PLZ ANSWER OF YOU KNOW IT
Answer:
its basically a layer that helps to absorb light energy there have a pog day friend
How many generations of cephalosporins are there?
Answer:
Cephalosporins are antimicrobials grouped into five generations based on their spectrum of coverage against gram-positive and gram-negative bacteria as well as their temporal discovery.
Answer:
Five Generation
Explanation:
Cephalosporins are antimicrobials grouped into five generations based on their spectrum of coverage against gram-positive and gram-negative bacteria as well as their temporal discovery.
PRETTY PLS HELP ME U WILL GET 30 POINTS
A. low mortality
B. low fertility rates
C. continued growth
D. mortality concentrated in oldest ages
E. life expectancy rose to above 40 years
Countries that began their demographic transition during the 18th and 19th centuries have now completed the transition and are
considered to be post-transitional. Which characteristics listed in the prompt would apply?
A)
A, B, and c
B)
A, B, and D
B, C, and E
D)
A, B, D, and E
Answer: A, B and D
Explanation: this would be the truly correct answer because post-transitional countries will have low mortality in the oldest ages, a low fertility rate, and negligible growth rates.
So A, B and C would not me the correct answer.
what is photosynthensis
Answer:
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
Explanation:
Answer:
Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds
Explanation: