Answer:
passive transport
Explanation:
The movement of ions across a cellular membrane without the need for energy input is known as passive transport. Diffusion is the passive movement of molecules from an area of high concentration to low concentration. Voltage describes the difference in electrical potential between two separate points, and isotonic movement describes the activity of a system at equilibrium.
Answer:
Passive transport
Explanation:
The movement of ions across a cellular membrane without the need for energy input is known as passive transport. Diffusion is the passive movement of molecules from an area of high concentration to low concentration. Voltage describes the difference in electrical potential between two separate points, and isotonic movement describes the activity of a system at equilibrium.
PENN
Approximately how much methane does one cow produce per year? How does the greenhouse gas warming effect of methane compare to carbon dioxide? Describe the organisms that digest and ferment the hay inside of the cow’s stomach? How are scientists reducing the amount of methane released from cows?
Answer:
Cattle and other ruminants are significant producers of the greenhouse gas methane—contributing 37 percent of the methane emissions resulting from human activity. A single cow on average produces between 70 and 120 kg of methane per year and, worldwide, there are about 1.5 billion cattle.
While carbon dioxide is typically painted as the bad boy of greenhouse gases, methane is roughly 30 times more potent as a heat-trapping gas. ... As temperatures rise, the relative increase of methane emissions will outpace that of carbon dioxide from these sources, the researchers report.
The cow's rumen is like a large fermentation vat. More than 200 different bacteria and 20 types of protozoa help the cow to utilize fibrous feedstuffs and non-protein nitrogen sources. ... Bacteria adhere to the feed and gradually digest the fermentable material.
“You can probably reduce methane by about 20-25% by altering diet,” he says. One study by researchers at the University of California, Davis, estimated it might be possible to reduce global methane emissions from cows by 15% by changing their diet.
Explanation:
Hope it helps.
Proteins are NOT found in what type of food source?
Answer:
all fruit except dried fruits
all vegetables except peas, beans and corn
herbs and spices
The pancreas secretes the hormones insulin and glucagon for homeostatic control of ______ levels in the blood. A. Glucose B. Sodium C. Potassium D. Lipids E. Amino Acid
They help control the A. Glucose levels in the blood
In Drosophila, the genes for body coloration and eye size are on different chromosomes. Normal-colored bodies are dominant to ebony-colored (very dark) bodies, and normal-sized eyes are dominant to eyelessness. Line A is true breeding for normal bodies and normal eyes, whereas line B is true breeding for ebony bodies and eyelessness. From an F 2 cross between lines A and B, 800 flies are scored. How many F 2 flies are expected to have normal body color and to be eyeless
Answer:
150.
Explanation:
150 flies are expected to have normal body color and to be eyeless in F2 generation. The reason for that population is the ratio of the species produced. The ratio of the species are 9:3:3:1. Ratio 9 refers to first parent while 1 refers to second parent and the middle 3's represent the hybrid formed. So the population of first parent is 450 and population of second parent is 50 while the population of two hybrids are 150 each.
Which type of muscle tissue is both voluntary and striated?
smooth
cardiac
skeletal
heart
Answer:
skeletal muscle fibres.
Explanation:
skeletal muscle fibres occur in muscles which are attached to the skeleton. They are straited in appearance and under voluntary control.
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Answer:
C
Explanation:
Hope that helps!
Label parts A and B in this picture of saprophytes (fungi)
Answer: A- Sporangium
B- Rhizoids
Explanation:
In the wild, various sperm and egg cells must navigate a complex environment to complete fertilization. There are mechanisms in place at the molecular level to guard against interspecies fertilization, even between very closely related species. Some of these mechanisms involve lock and key functions of interacting proteins. These molecules most likely regulate which type of reproductive isolation mechanism? Please explain.
Answer:
pre-zygotic reproductive isolation
Explanation:
The molecules regulate the pre-zygotic reproductive isolation mechanism.
Reproductive isolation generally refers to the variety of biological processes that sustain the formation of new species of biological organisms.
Some of these processes act to prevent fertilization or the formation of zygotes between organisms that are not of the same species (pre-zygotic mechanisms) while others ensure that the product of fertilization is invalid in case the former fails (post-zygotic mechanisms).
Some pre-zygotic mechanisms ensure that there exists no form of mating among organisms that are not of the same species due to incompatible reproductive organs, but where this fails, another pre-zygotic mechanism will act so that that the mating will not lead to fertilization and there will not be formation of zygotes.
The prevention of fertilization between organisms with compatible reproductive organs but of different species is carried out by molecules. These molecules ensure that there are locks and keys in place to prevent the fertilization of the egg by the sperm.
Which of the following particles has a negative charge?
A.
Nucleus
B.
Neutron
C.
Electron
D.
Proton
Answer:
C. Electron (e-) has a negative charge
Answer:
c
Explanation:
In both photosynthesis and respiration, _______ synthesis is coupled to the diffusion of protons across a membrane from high to low concentration.
Answer:
ATP is the answer
Two students performed the same experiment, testing how far iodine will diffuse through starchy tissue, such as potatoes. They cut 5 potato squares each, all of equal sizes, and placed them into small cups with iodine solution for 15 minutes. Then they measured how far from the edge of the potato the iodine diffused into the potatoes, in millimeters
Distance Diffused (mm)
Trial 1 Trial 2 Trial 3 Trial 4 Trial 5
Student 1 3.25 3.17 3.26 3.64 3.44
Student 2 3.14 3.43 3.22 3.37 3.28
What is the range of student 1's results?
A. 3.35
B. 0.29
C.0.47
D. 3.29
Answer:
0.19
Explanation:
3.44-3.25 = 0.19
Is B supposted to be 0.29 or 0.19?
The the range of student 1's results is 0.47. The correct option is C.
What is testing?An experiment is a test in which a system's component is changed to examine how the result is affected.
In order to determine the exact source of the experimental outcomes, tests should ideally involve manipulating as many additional variables as possible.
The process of scientific testing is determining what we would expect to see if a theory were true and contrasting it with what we actually see.
Through testing and experimentation, the scientific method establishes facts in an unbiased manner.
Making an observation, formulating a hypothesis, making a prediction, carrying out an experiment, and then evaluating the findings are the fundamental steps.
The range of student 1’s result is equal to = 3.64 - 3.17 = = 0.47
Thus, the correct option is C.
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In the body, the homeostasis of which element is related to properties of bone?
Answer:
Homeostasis of calcium
Explanation:
Bone homeostasis is a complex process by which osteoclasts resorb bone and osteoblasts engage in new bone tissue formation. This sequence has to be controlled and and planned in order to maintain skeletal integrity of bones.
Calcium homeostasis is related to bones physical properties because play a crucial role in skeletal muscle maintenance by acting as mitogen-activated protein kinase (MAPK) signaling effector and other different pathways that is responsible for regulating cell proliferation, differentiation, and cytoskeletal restructuring .
In the body, the homeostasis of Calcium element is related to properties of bone
What is Bone homeostasis?Bone homeostasis is defined as the dynamic equilibrium which is maintained by the regulatory functions of the three major bone cells, osteoclasts, osteoblasts and osteocytes, as long as the activities of these cells are properly adjusted, therefore the net bone mass is maintained.
Calcium homeostasis is related to the physical properties of bones as it plays an important role in skeletal muscle maintenance by acting as an effector of mitogen-activated protein kinase (MAPK) signaling and various other pathways that regulate cell proliferation, differentiation and cytoskeletal reorganization.
Thus, in the body, the homeostasis of Calcium element is related to properties of bone.
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What substance are the bacteria (microorganisms) breaking down in the digestive system of cattle? Describe the digestion of this substance.
Answer:
The Bacteria or microorganisms are present in the rumen of cattle that aid in the digestion of cellulose and grains in the digestive system of cattle.
The process of digestion of cellulose by bacteria in cattle is anaerobic digestion and includes two steps – the production of the required enzymes and the fermentation.
In the fisrt step of production of enzyme, the microbes or bacteria are found in the first chamber of the stomach. These bacterias or microbes releases several enzymes that helps in splitting the cellulose into smaller carbs such as glucose.
These smaller carbs are the move to thrd chamber of the stomach and fermented. the required nutrients are absorbed. The digested food then finally reached at fourth chamber (acidic part), where the remained food is digested and passes to the small and large intestines.
How are the current and resistance related when the voltage of a circuit is constant?
The current doubles when the resistance doubles because they are directly proportional.
The current doubles when the resistance doubles because they are inversely proportional.
The current is cut in half when the resistance doubles because they are directly proportional.
O The current is cut in half when the resistance doubles because they are inversely proportional.
Answer:
The current is cut in half when the resistance doubles because they are inversely proportional.
Explanation:
Ohm's law states that the electrical current (I) flowing in a circuit is proportional to the voltage (V) and inversely proportional to the resistance (R).
I = V/R
Similarly, increasing the resistance of the circuit will lower the current flow if the voltage is not changed.
HOPE IT HELPS.
Answer:
D
Explanation:
Primatologists Group of answer choices know nothing of primate bones. study only physical aspect of primates. explore the relationships between specific social behaviors and reproductive fitness. study cultural anthropology.
Answer:
The correct option will be Option B (study only physical aspect of primates).
Explanation:
The significant components of that same endangered as well as surviving primates are analyzed by a primatologist. Also, the primates come to terms with either the molecular and physiological elements. A primer broader knows a great deal about everything from the bones of the primates. We also integrated depth of understanding of both biologizes including primate behavior.The other choices don't apply to the specified scenario. So option B will be the perfect option for b.
Write the numbers in the correct order to sequence the food through the digestive tract. 1- Peristalsis begins in the esophagus. 2- Food is pushed into the throat with the tongue. 3- Epiglottis closes to allow food to pass to the esophagus. 4-Chyme mixes with digestive enzymes. 5- Esophageal sphincter allow food to pass to the stomach. 6- Food is mixed with digestive juices forming the chyme that moves to the small intestine. 7- Stool moves to the rectum then to the anus. 8- Digested nutrients move to the blood. 9- Water is absorbed and waste is transformed into the stool. 10- Waste product moves into the large intestine. )
Answer:
2: food is pushed into the throat with the tongue, 3 epiglottis closes to allow food to pass esophagus, 1 peristalsis begins, 5 esophageal sphincter allow food to pass, 6,4,10, 9,7,8
Explanation:
Art-Labeling Activity: Components of blood.
Explanation:
Blood is a specialized body fluid. It has four main components: plasma, red blood cells, white blood cells, and platelets.
What is one way to classify mud found in an ecosystem? organism population biotic factor abiotic factor
Answer:
abiotic factor
Explanation:
Mud, while hosting many multicellular and unicellular organisms, simply refers to the combination of water and dirt, neither of which are living.
Answer:
abiotic factor
Explanation:
whats 20x20? thank you
Answer:
400 yayyyyyy
Explanation:
yvhjghkkkkhhh
Answer:400
Explanation:
20
x20
_____
00
+400
--------
400
Me ayudan es para la noche.
Elabora un cuadro identificando las características homogéneas de los ecosistemas peruanos y ubica en el mapa del Perú cada uno de los ecosistemas.
Answer:
Los ecosistemas peruanos comprenden montañas, ríos, lagos y selvas tropicales.
Explicación:
Las características de los ecosistemas peruanos son montañas, ríos, lagos y selvas tropicales. La montaña que está presente en el Perú es la cordillera de los Andes. El río llamado río Amazonas también está presente en esta región. El lago Titacaca también está presente en esta área y en el tercer bosque tropical más grande del mundo. Debido a la gran diversidad, cerca de 30 ecosistemas están presentes en el Perú. El ecosistema forestal está presente a gran altura en las montañas, mientras que los ecosistemas de ríos y lagos están presentes en la parte inferior del mapa.
the fact that for a given species the amount of purnies in hte dna always matches the number of pyrimidines was first determined by
Answer:
It was given by Chargaff and it is know as chargaff's rule
If a splinter of wood were to enter the skin and introduce microorganisms to that site, what specific early and late events of inflammation would respond to that newly infected tissue
Answer:
If a splinter of wood enters the skin and introduces microorganisms to the site the body would first release chemical mediators like histamine then cause vasoconstriction. Platelets work to make a blood clot then neutrophils come in and vacillation occurs. This causes redness, warmth, swelling and pain. Edema and pus formation occurs therefore the neutrophils work to rid the area of cell debris and pathogens. Later the lymphocytes and macrophages will finish the job of the neutrophils and scar tissue is formed to repair the damaged tissue.
Explanation:
Which could best be used to explain why bacteria can infect a person very quickly? outer capsule binary fission protective covering genetic recombination
The reason why bacteria can infect a person very quickly is because of the process of binary fission.
What is binary fission?
Binary fission is defined as the reproduction process that is found in prokayotes such as the bacteria.
The binary fission involves these steps:
Replication of DNA (deoxyribonucleic acid),Growth of a cell,Segregation of DNA and Splitting of cells.The final stage which is the splitting of cells leads to the formation of many daughter cells of the parent bacteria cell which can eventually led to infection.
Therefore, the reason why bacteria can infect a person very quickly is because of the process of binary fission.
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Answer:
Which could best be used to explain why bacteria can infect a person very quickly?
x. outer capsule.
√. binary fission is the right one.
x. protective covering.
x. genetic recombination.
Explanation:
I got 100% on the test
⬆️ plus the person above is correct ⬆️
Why were the advent of metagenomics, and the application of molecular techniques such as single-cell and next-generation sequencing, important for defining a microbial relationship
Answer:
Based on novel approaches, it has been seen that symbiotic associations prevails between a host and one to thousands of more microbes, which challenges the previous meaning of symbiotic association as one that takes place between the host and a single microbe. It was considered previously that symbiotic association’s takes place only between the pair of single microbe and host.
However, newer approaches has revealed that such kind of association can take place between one microbe and many other hosts. A symbiotic association can take place between microbe-microbe, plants-plants, microbe-plants, and others. However, symbiotic association has never been found to take place between a bacteria and animal host. The symbiotic associations are always not parasitic.
History has demonstrated that the techniques employed in this laboratory exercise often overestimate an individual's actual resting tidal volume. List some reasons why these laboratory techniques might produce abnormally high values for resting tidal volume.
Answer:
See below
Explanation:
One possible reason here could be the fact that since the person is being watched while doing this exercise, they might tend to breather deeper than they normally do. Secondly, it may also be because the person is trying to make up for the spit filter and flow meter by breathing harder/sharper than they normally would.
The adaptive structure and function of leaves and stems helps the plant
A create its own energy
B prevent wilting
C produce haploid gametes
D produce diploid gametes
Answer:
I think, your answer is,. create it's own energy. By the process of photosynthesis, where stems and leaves do their major function.Explanation:
Hope it helps you........Answer:
A. Create it's own energy
Explanation:
Plants have adaptations that assist in the creation of energy such as: stems support and hold the leaves above the ground for more light, surface of leaves exposed to sunlight.
A karyotype shows that a child has Klinefelter syndrome (47,XXY). If the child is also color-blind (due to a recessive X-linked allele), despite his parents having normal color vision, in which parent and stage of meiosis did nondisjunction occur?
Answer:
It occurred in the mother and in meiosis II stage
Explanation:
A karyotype shows that a child has Klinefelter syndrome (47,XXY) which involves a male child having an XXY chromosome in which the XX chromosome codes from the mother.
If the child is also color-blind (due to a recessive X-linked allele), despite his parents having normal color vision then the nondisjunction occurred in meiosis II because sister chromatids separate during meiosis II and the non separation is the reason for the Klinefelter syndrome.
20. Geneticists creating the "glow in the dark" or fluorescent rabbit, inserted the GFP gene
from a jellyfish that makes it glow. The geneticist studied these rabbits to learn how....
(1 point)
A)to create a new energy source
B)to create interesting looking pets.
C) the florescent cells can help track the movement of cells.
D) to create light in a dark laboratory.
The correct answer is C) the fluorescent cells can help track the movement of cells.
Explanation:
In the last years, geneticists and scientists created animals that glow in the dark by inserting a Green Fluorescent Protein or GFP gene found in some species of jellyfish. This protein was used in animals such as rabbits, rats, and even chickens. One of the key reasons for this is that by inserting fluorescence scientists can better observe the development and movement of cells. This includes analyzing cells reproduction and growing in embryos of "glowing" animals or inserting the protein in specific cells or organs in an organism to observe how these change or move. Thus, the purpose of studying fluorescent rabbits is that "the fluorescent cells can help track the movement of cells".
How does a catalyst influence a chemical reaction?
Answer: A catalyst speeds up a chemical reaction, without being consumed by the reaction. It increases the reaction rate by lowering the activation energy for a reaction. ... Remember that with a catalyst, the average kinetic energy of the molecules remains the same but the required energy decreases
Explanation:
If one DNA strand is 5'-GGCATTACACTAGGCCT-3', what is the complementary srand?
Answer:
3' - CCGTAATGTGATCCGGA - 5'
Explanation:
In DNA, the leading strand builds from a 5' to 3' direction and the lagging strand (complementary strand) must build from a 3' to 5' direction.
The base-pairing rules for DNA are:
- adenine always pairs to thymine (A to T) (T to A)
- guanine always pairs to cytosine (G to C) (C to G)
How are vascular tissues arranged in dicot stems?