Answer:
Land animals breathe air.
Explanation:
what does the circle of life mean
Answer: Below
Explanation:
Generally the circle of life refers to the circle of birth, survival, and death.
1. compare and contrast channel proteins and the classes of carrier proteins (e. g. , uniporter, symporter, and antiporter) including the relative direction of molecule movement and any associated energetic needs. which protein class would nicotinic acetylcholine receptors (nachrs) be associated with?
2. in cardiac muscle, acetylcholine binds to muscarinic acetylcholine receptors (machrs), which are g-protein coupled receptors, which elicit a signal transduction pathway that induces cardiac muscle to relax. outline how g-protein coupled receptors induce signal transduction pathways including relevant secondary messengers.
3. interpret dr. peterson’s statement that active transport is essential for facilitated diffusion of na+ ions to occur in muscle cells. how are na+/k+ pumps involved in this process? sketch a na+/k+ pump indicating conformational changes and energy usage steps and identify ions that are moved during the cyclic process.
4. generally, after neurotransmitters are released in the neuromuscular junction, many of the neurotransmitters or some of their components are recycled by a reuptake mechanism inherent in the pre-synaptic neuron. considering that the reuptake mechanism is often a sodium-dependent process that utilizes membrane potential, what type of membrane transport might you expect to be in play here?
Uniporter allows the movement of a subtance in one direction, symporter two molecules in the same sense and antiporter two in opposite sense. Nicotinic acetylcholine receptors are linked to symporters to allow the movement of neurotransmitters. G protein function is coupled to second messengers such as cyclic AMP, active transport allows the movement of substance again a concentration gradient and reuptake mechanism involves symporter transport.
What are uniporter, symporter, and antiporter?The terms uniporter, symporter, and antiporter make reference to different types of channel proteins located in the cell membrane which allows the movement of molecules through this selectively permeable barrier.
Moreover, nicotinic acetylcholine receptors are receptors that bind to certain neurotransmitter chemical messengers such as acetylcholine in order to allow the movement of ions through the membrane.
Therefore, with this data, we can see that uniporter, symporter, and antiporter are different classes of channel proteins in regard to the movement of molecules in and out of a selectively permeable barrier (i.e. the cell membrane).
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Hemoglobin is crucial for oxygen transport in the blood because oxygen has a _______ solubility coefficient in water.
Answer: Hemoglobin is crucial for oxygen transport in the blood because oxygen has a low solubility coefficient in water. :)
Which two phases of meiosis are most likely to cause chromosomal disorders?
Answer:
Nondisjunction can occur during anaphase of mitosis, meiosis I, or meiosis II. During anaphase, sister chromatids, will separate and move to opposite poles of the cell, pulled by microtubules.
Explanation:
How long does it take for a maggot to turn into a fly.
Answer:
between 14-36 days.
For individual organisms in most ecosystems, energy for metabolism originates from:.
Answer: sunlight and carbon dioxide
Explanation:
what would happen to the sea star or the seaweed if the algae were not present
Answer:
Star fish (sea stars) prey on mussels and if the sea stars are removed from the environment, the mussel population will greatly increase and other organisms may have difficulty living in that environment.
Starfish are known as keystone predators. They prey upon species like urchins or mussels that can have a negative impact on the ecosystem if their populations grow too much. However, if the Starfish don't prey upon urchins and mussels those population could grow and take over the ecosystem and create many problems for other species.
Explanation:
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Which of the following is shown by this gel?
OA.
The size of various molecules or fragments of DNA.
ОВ.
The size of each individual DNA base.
OC.
The number of strands of DNA in a molecule.
OD.
The sequence of nucleotides in a molecule.
A scientist is studying the age structure of a small country, which is shown in the following diagram.
This graph charts the ages of the population of Nger of both men and women. There are much more young people than old people across both genders.
Which conclusion does the diagram most strongly support?
A. The population of the country is increasing at a rapid rate.
B. The population of the country is relatively stable, and neither increasing nor decreasing significantly.
C. In 50 years, about 20 percent of the population will be ages 0 to 4.
D. In 50 years, about 20 percent of the population will be ages 50 to 54.
Answer:
A :The population of the country is increasing at a rapid rate.
Explanation:
trust :)
Forensic scientists can use which of the following to test for the presence of drugs in a human?
Blood
Hair
Saliva
All of the above
Answer:
All of the above
Explanation:
The analytical approach in forensic chemical analysis of an unknown substance is to narrow down the possibilities until a drug is identified. After visual examination, presumptive or screening tests are conducted.
Forensic scientists are the category of scientists dealing with the test and test sampling. Drugs are mostly flown in the blood . The correct answer is all of the above.
What are the types of drugs ?
Drugs can be both narcotics and non- narcotics. There are the different categories that affect the central nervous system.
Drugs mostly flow in blood because of ions and molecules that get mixed with the blood.
Drugs mostly are prone to be mixed with the blood and these have easy and fast affect on the human body which makes us sometimes bear the mechanism of body reactions.
There are strong reactions that are complex that takes place in the body that makes us habitual sometimes.
Therefore, Forensic scientists can use blood as the most acceptable along with exceptions to other three options as well of the following to test for the presence of drugs in a human.
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Which of the following describes an outcome of water scarcity in a community?
A. Emigration of people into the area
B. Increased housing and construction
C. Increased poverty and disparity
D. More imports and exports
Answer:
C. Increased poverty and disparity
Explanation for the other answers being Incorrect:
A. More people are not going to move into an area with a shortage of water.
B. Water scarcity would most likely not have a direct correlation to the construction output. However, if it did, it would most likely make the construction and new housing rate decrease
D. Not having water can make people move away and leave the area, meaning that imports and exports which require workers would not see an increase of imports and exports
The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called __________.
Answer:
phospholipid bilayer
Explanation:
The cell membrane is composed mainly of phospholipids, which consist of fatty acids and alcohol. The phospholipids in the cell membrane are arranged in two layers, called a phospholipid bilayer.
ocean waves drop sand, sediment, and broken pieces of shell onto beaches and coastlines. This process is called —
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Spiny or sticky pollen grains and large, attractively coloured flowers are associated with
(a) hydrophily
(b) entomophily
(c) ornithophily
(d) anemophily
Answer: insect pollination
Explanation: The insect come to the flower which are brightly coloured to collect nectar from it.
Answer:
Entomophily
Explanation:
Entomophily denotes to pollination thorough agencies of several insectsThis kinds pollination is also called insect pollinationFlowers make them attracting to attract those insectsOption B
How does the nucleus work with the ribosomes to maintain the structure and function of a cell?
Answer:
The nucleolus within the nucleus produces ribosome subunits, which are assembled outside the nucleus into ribosomes. The nucleus then sends mRNA to the ribosomes, which is used to code for protein synthesis.
What is the colorless, odorless gas that binds to red blood cells causing the body not to get the oxygen it needs?
Answer:
Therefore,when carbon monoxide is present,it blind to hemoglobin preferentially over oxygn.As a result,oxygen cannot blind to hemoglobin ,so very little oxygen is transported through the body carbon monoxide is a colorless odorless gas and is therefore difficult detect.
Answer: Carbon Monoxide
Why do they call them fossil fuels
Answer:
Fossil fuels got the name from being produced by fossilized remains of plants and animals. Fossil fuels are also known for having awfully high carbon levels, which is not good.
__________________________________________________________
Questions?Ask in the comments.
Answer:
because they were formed from the fossilized, buried remains of plants and animals that lived millions of years agoago
Explanation:
Lyme disease is an example of a(n) ______ infectious disease, because it is only seen in areas of the US where the tick vector for the pathogen is found.
Lyme disease is an examples of vector borne infectious disease.
What is Lyme disease?Lyme disease is also called Lyme borreliosis, is an example of a vector-borne disease whose causative agent is Borrelia bacterium and it is transmitted by tick in the genus Ixodes. The common sympyoms of the infection is red rash, known as erythema migrans, which appears at the site of the tick bite.
Therefore, Lyme disease is an examples of vector borne infectious disease.
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Lyme disease is a disease transmitted by the bite of an infected tick and is an example of an endemic infectious disease.
What is an endemic infectious disease?It refers to the constant presence and/or habitual prevalence of a disease or an infectious agent in a population of a geographic area.
Lyme disease is a borreliosis transmitted by ticks of the genus Ixodes that seems to be limited to certain geographic areas of the US, therefore it is considered endemic.
Therefore, we can conclude that Lyme disease is a disease transmitted by the bite of an infected tick and is an example of an endemic infectious disease.
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Which molecules form the thick filaments of sarcomeres?.
Answer:
myosin forms the thick filaments
actin forms the thin filaments
Explanation:
How does the structure of the water molecule lead to its
ability to dissolve polar compounds?
Answer:
It is polar, allowing for the formation of hydrogen bonds, which allow ions and other polar molecules to dissolve in water. Therefore, water is an excellent solvent. The hydrogen bonds between water molecules give water the ability to hold heat better than many other substances.
Pls help ASAP WILL GIVE BRAINLIEST 100POINTS!
Meiosis Questions:
1. How many chromatids are present in one homologous pair of chromosomes?
2. What is meant by “crossing-over” in meiosis, and how did your model depict this?
3. What effect does crossing-over during meiosis have on the genetic makeup of daughter cells?
4. Why must the number of chromosomes in reproductive cells (gametes) be different than the number of chromosomes in the rest of an organism’s cells (somatic cells)?
Explanation:
Two sister ChromatidsCrossing over is the exchange of genetic material between two homologous chromosomes to give rise to recombinant chromosomesallows the daughter cells of meiosis to be genetically unique from one another. because the DNA of the parent cell is shuffled before the cell divides.Use the resources provided to either describe in words OR create a model that describes at least 4 reasonable factors that might influence the carrying capacity of Nubian ibex in Israel.
Poaching, division of populations, loss of habitat and water availability affects the carrying capacity of Nubian ibex.
Factors affecting carrying capacityPoaching, division of populations, loss of habitat and water availability are the factors that greatly influence the carrying capacity of Nubian ibex at a particular region because these factors are the requirement of this organism for its survival.
So we can conclude that Poaching, division of populations, loss of habitat and water availability affects the carrying capacity of Nubian ibex.
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Please help as soon as possible
PLEASE HELP WILL GIVE BRAINLIEST!!!!
Answer:
No, because in mammals the male transfers his genes by fertilizing the female directly. In plants, there even could be, the plant fertilizing itself, but the pollen is transferred differently than the mammal.
What is the difference between a scientific theories and a scientific laws?
A theories
Blaws
Cevidence
DAll of the above
Examine the model for two cellular organelles found in many eukaryotic cells. Which molecule(s) could be represented by the circle labeled Z that is produced as an output of the mitochondria and required by the chloroplast? Select ALL that apply.
A)Letter Z could be carbon dioxide because it is produced in cellular respiration and is a reactant of photosynthesis.
B)Letter Z could be a water molecule because it is produced in cellular respiration and is a reactant of photosynthesis.
C)Letter Z could be a water molecule because it is produced in photosynthesis and is a reactant of cellular respiration.
D)Letter Z could be a glucose molecule because it is produced in photosynthesis and is a reactant of cellular respiration.E)Letter Z could be an oxygen molecule because it is produced in cellular respiration and is a reactant of photosynthesis.
Answer:
A)Letter Z could be carbon dioxide because it is produced in cellular respiration and is a reactant of photosynthesis.
B)Letter Z could be a water molecule because it is produced in cellular respiration and is a reactant of photosynthesis.
Which of the following is the correct chemical formula for glucose
Answer:
C6H12O6: 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms bonded together making one molecule of glucose
a short note on plant cells and animal cells
Answer:
Nucleus, cell membrane, cytoplasm and mitochondria are four cell components that are found in both animal and plant cells.Explanation:
which of the following is NOT a natural resource?
O gold
O water
O oil
O fire
Answer:
oil
fire gold and water are all naturally from earth, oil is not.
