Identify the correct sequence of molecules, as a gene goes from coded information in the nucleus, to the product the cell wants to make. qwizlet
The answer is DNA...messenger RNA...transfer RNA...Protein. RNA polymerase is responsible for the development of RNA (later spliced into mRNA) from DNA. mRNA then forms a complex with ribosome and tRNA to translate the mRNA into a polypeptide/protein. This flow is referred to as the central dogma.
Answer:
DNA -> messenger RNA -> transfer RNA -> protein is the answer
Explanation:
Which of Earth’s layers is just below the lower mantle?
Answer:
Outer Core
Explanation:
APEX
The Earth's structure can be divided into several layers: the crust, the mantle, the outer core, and the inner core. The layer just below the lower mantle is the outer core.
Layers of the Earth:
Crust:
The Earth's outermost layer is called the crust. It is the thinnest layer, ranging from about 5 to 70 kilometers in thickness.The crust is composed mainly of rocks such as granite and basalt.Mantle:
The mantle lies beneath the crust and extends to a depth of approximately 2,891 kilometers. It is the largest layer of the Earth by volume. The mantle is composed of solid rock that is capable of flowing over long periods of time, similar to a very thick and viscous liquid.Outer Core:
Below the lower mantle is the outer core, which extends from a depth of about 2,891 kilometers to approximately 5,150 kilometers. It is in a liquid state due to the high temperatures and pressures present at those depths. The outer core plays a crucial role in generating the Earth's magnetic field through the movement of the molten metal.Inner Core:
The inner core is located at the center of the Earth, beneath the outer core. It extends from a depth of approximately 5,150 kilometers to the Earth's center, which is about 6,371 kilometers from the surface. The inner core is a solid sphere composed mainly of iron and nickel.Thus, the layer below the lower mantle is the outer core.
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A five-year review of threats to the southern resident orca population of the United States concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. Further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. How might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters?
The transient population is more likely to be affected by contaminants.
The transient population is less likely to be affected by whale watching vessels.
The transient population is more likely to be affected by disease.
The transient population is less likely to be affected by prey availability.
This is for study guide. Which one would it be?
Answer:
The correct answer is the second statement.
Explanation:
The transient populations’ exhibit unique merit of being able to move in between distinct places, and therefore, are less influenced by the detrimental local conditions. Because of the fact that there are more individuals in an average in a population, and the fact that they thrive farther offshore, the influence of whale watching vessels on the entire population is most possible to be the least.
Due to the fact that the population does not thrive in the similar location for the prolonged-time period, it is less possible to be influenced by the local contaminants, diseases caused by local conditions, as well as the availability of prey.
____ is a chemical that promotes seed dormancy and is also involved in opening and closing of stomata as leaves wilt
abscisic acid i am 100% sure
A spinal nerve is classified as motor or sensory, depending on the type of fibers it contains, true or false.
identify one function of the decomposer in this food web
Decomposers break down dead matter and waste, recycling essential nutrients like carbon and nitrogen back into the ecosystem, which supports plant growth and sustains the food web.
Explanation:One function of the decomposer in a food web is to break down dead organisms and waste materials. Decomposers, such as bacteria, fungi, and earthworms, perform a critical role by returning essential nutrients like carbon and nitrogen back into the ecosystem. These nutrients are vital for the growth of primary producers like plants, which form the foundation for other trophic levels in the food web. By breaking down complex organic materials into simpler forms, decomposers release these elements into the soil, making them accessible to plants and thereby sustaining the cycle of life.
What is one cause of increased stress among veterinarians in the United States?
Final answer:
Increased work-related stress, stemming from long hours, emotional strain, and financial pressures, is a significant cause of stress among veterinarians in the United States, affecting their mental and physical health.
Explanation:
One significant cause of increased stress among veterinarians in the United States relates to work-related stress. The demanding nature of veterinary work, which often includes long hours, emotional strain from dealing with sick or dying animals, and financial pressures due to student loans, contributes significantly to their stress levels. Additionally, the high expectations for care from pet owners can exacerbate stress and burnout. According to a study referenced in our discussions, work-related stress not only affects mental health by leading to burnout, depression, and anxiety but also contributes to physical health issues by increasing susceptibility to infections.
Moreover, the broader context of how workplace stress impacts various professions, including veterinarians, highlights a crucial area for intervention and support. The findings from studies show a clear trend where stress in the workplace, if not managed properly, can lead to significant health problems and affect professional performance. It's evident that stress management and mental health support systems are essential in helping veterinarians manage the varied and significant pressures of their profession.
Which statement is true?
A.
Prokaryotic cells do not have a membrane.
B.
Eukaryotic cells have multiple membranes.
C.
Eukaryotic cells have one membrane.
D.
Prokaryotic cells have multiple membranes.
Which factors affect the rate of photosynthesis? Select all that apply.
light intensity
pH temperature
chlorophyll density
water
carbon dioxide
soil nutrients
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Answer: light intensity, chlorophyll density, water, carbon dioxide
Explanation:
Photosynthesis is a chemical process that occurs in the leaf cells of the plants. In this the light energy from sun is converted into chemical energy in the form of food. The light energy from sun is captured by the chlorophyll pigment of the leaf cells. The more the density of chlorophyll pigment the speed of the reaction will be more as it will be able to capture more amount of light energy.
The light intensity is also important because the more intense the light the more frequent will be the production of food products.
Water and carbon dioxide are the chief reactant for the process of photosynthesis. The more the concentration of the reactant the faster will be the rate of the reaction.
Which term does NOT apply to sodium chloride? Question 1 options: A: molecule B: crystal C: compound D: ionic bonding
The term that is not applicable to the sodium chloride is molecule. The correct option is A.
What is a molecule?One or more atoms make up a molecule. If they have more than one atom, the atoms can be the same, as in an oxygen molecule, or different, as in a water molecule, which has two hydrogen atoms and one oxygen atom.
Many thousands of atoms can make up biological molecules like proteins and DNA.
Table salt NaCl is a compound because it contains two elements sodium and chlorine, but it is not a molecule.
Since the bond that holds NaCl together is an ionic bond. One can call sodium chloride an ionic compound if they want.
Thus, the correct option is A.
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What are chemicals that transfer impulses from one neuron to another called?
Neurotransmitters are chemicals that transfer impulses between neurons, and they can be either excitatory or inhibitory, influencing the action potential in the postsynaptic neuron.
Chemicals that transfer impulses from one neuron to another are called neurotransmitters. These chemical messengers are released from vesicles in the axon terminal of the presynaptic neuron into the synapse during a process known as exocytosis. They then travel across the synaptic cleft and bind to receptors on the postsynaptic neuron's membrane. This binding can either initiate or inhibit an action potential in the postsynaptic neuron, depending on whether the neurotransmitter is excitatory, like acetylcholine or epinephrine, or inhibitory, like serotonin or GABA. Examples of neurotransmitters include dopamine, which is involved in many neurological processes and is linked to diseases such as Parkinson's and schizophrenia.
Most of the water taken up by a plant is _____. most of the water taken up by a plant is _____. used as a solvent lost during transpiration used as a hydrogen source in photosynthesis used to keep cells turgid
The correct option is A) i.e. used as a solvent lost during transpiration.
Most of the water taken up by a plant is lost during transpiration, which involves the evaporation of water from plant tissues through the stomata in the leaves.
While some water is used for other functions, transpiration accounts for the major portion of water consumption in plants.Transpiration causes a plant to lose the majority of the water it absorbs. This process involves the evaporation of water from plant tissues, primarily through small pores in the leaves known as stomata. During transpiration, water moves from the soil into the roots, through the plant, and eventually evaporates into the atmosphere, maintaining a continuous stream. While some water is used for photosynthesis, maintaining cell turgor, and transporting minerals, the majority is lost via transpiration.The process by which moisture moves from roots to tiny pores on the underside of leaves, where it transforms into vapor and is expelled into the atmosphere, is called transpiration. It is essentially a form of evaporation of water from plant surfaces. This process is crucial for plants as it helps cool them down, deliver nutrients to cells, and maintain turgor pressure.Unattached earlobes are dominant to attached earlobes. Cleft chin is dominant to no cleft. Parents that are heterozygous for both traits are crossed. Determine the genotype of the following offspring.
The characters that are visible on the outer surface is called phenotype and the characters coded by the genes are called genotypes. The gene having the allele for the recessive and the dominant trait together is said to be heterozygous.
a) 9:16 b) 3:16 c) 3:16 d) 1:16 is the ratio of the genotypes of the offspring.
How to determine the genotype?The alleles for the traits are given as:
The alleles for the Cleft chin = CCThe alleles for no Cleft chin = ccThe alleles for the unattached earlobes = EEThe alleles for the attached earlobes = eeParents with heterozygous trait = CcEeSee the attached image below for the Punnett square of the cross.
From the cross the ratios are:
Unattached earlobes and cleft chin = 9:16Unattached earlobes and no cleft = 3:16Attached earlobes and cleft chin = 3:16Attached earlobes and no cleft = 1:16Therefore, the genotype is 9:3:3:1.
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Final answer:
The student's question involves the genetic inheritance of unattached earlobes and cleft chin, both autosomal dominant traits. When heterozygous parents for both traits are crossed, four possible genotype combinations (FfBb, Ffbb, ffBb, ffbb) can result for their offspring, as determined by a Punnett square.
Explanation:
The student's question pertains to the inheritance of two autosomal dominant traits: unattached earlobes and a cleft chin. When parents are heterozygous for both traits, the possible genotype combinations of their offspring can be determined using a Punnett square. Let's denote unattached earlobes with the dominant allele F and attached earlobes with the recessive allele f. Similarly, we'll denote a cleft chin with the dominant allele B and no cleft chin with the recessive allele b. Since the parents are heterozygous for both traits, their genotypes are Ff and Bb, respectively. When we create a Punnett square for these two traits, each parent contributes one allele for each trait, resulting in a 1:1:1:1 ratio in the offspring with the following genotype possibilities: FfBb, Ffbb, ffBb, and ffbb.
Which best describes the carrying capacity of an environment?
An area of a desert can support a population of 320 cactus plants.
Over 1,500 species of birds live in a tropical rain forest.
About 500 fish in part of a river died as a result of water pollution.
A vegetable garden is six feet long and 10 feet wide.
Answer: An area of a desert can support a population of 320 cactus plants.
Explanation:
The carrying capacity of an ecosystem can be define as the maximum number of individuals of the population of the species that an ecosystem can support on the basis of availability of resources such as water, food, habitat and other resources. When the population of a species in an ecosystem exceeds the carrying capacity of an ecosystem then population will decline as the ecosystem will not support increase in such growth.
According to the above information, An area of a desert can support a population of 320 cactus plants is the correct option.
Answer:
what he said
Explanation:
What is the fatty insulating material that surrounds the axons?
A single ________ on the ________ chromosome plays a crucial role in the prenatal development of the testes.
a. gender schema; y
b. gene; y
c. gender schema; x
d. gene; x
Answer:
A single gene on the Y chromosome plays a crucial role in the parental development of the testes.
Explanation:
Y chromosome is present only in males and this chromosomes is the distinguishing factor which separates males from females. It is the smallest chromosome but of utmost importance due to its sex determining feature. Up till now, studies show that Y chromosomes only carry limited amount of genes.
The Y chromosome, most importantly, comprises of the SRY gene. This is the gene responsible for determining the testis and for the development of the testis. The SRY gene is responsible for sex determination.
The correct answer is b. gene; Y. The SRY gene on the Y chromosome is crucial for the prenatal development of the testes and male sex determination.
The correct answer to the question "A single ________ on the ________ chromosome plays a crucial role in the prenatal development of the testes." is b. gene; Y.
The critical gene on the Y chromosome that is responsible for this process is called the sex-determining region Y (SRY) gene. This gene encodes a protein known as the testis-determining factor (TDF), which directs the embryonic gonads to differentiate into testes. The development of the testes is a key step in male sex determination, leading to the production of testosterone and the development of male reproductive structures.
In summary, the Y chromosome, which contains fewer genes than the X chromosome, has a specific gene called SRY that is essential for male development. Without the Y chromosome carrying the SRY gene, the embryo would typically develop as female, which is considered the default sex in humans.
Cerebrospinal fluid is gradually reabsorbed in what part of the brain?
Prescribing for women during their childbearing years requires constant awareness of the possibility of:
Kira is a hemophiliac. This means that she does not produce clotting factors. What aspect of the clotting process should she be worried about not functioning?
What is a possible effect of crossing animals that belong to different species?
Answer:
Most animals that are not part of the same species cannot mate and have fertile eggs/babies. However there is some cases where this can happen. Such as a raccoon and cat. It is rare but possible.
Explanation:
Why does water need a protein channel to move across the cell membrane?
The observation that chloroplasts and mitochondria each contain their own dna and synthesize some of the proteins that function in these organelles suggests that chloroplasts and mitochondria __________. must divide each time the cell containing them divides are produced by the nucleus of the cell contain three sets of membranes are part of the endomembrane system
If 30% of a dna strand is composed of adenine bases, what percent of the strand is composed of guanine bases?
Iodine-131 has a half-life of 8 days. In how many days will a 1 kg sample of iodine-131 decay and reduce to 0.0625 kg of iodine-131? a.8 days b.16 days c.24 days d.34 days
The answer is actually 32 days
days: 0, 8, 16, 24, 32
kg: 1, .5, .25, .125, 0.0625
The Iodine-131 decay has a half-life of 8 days and the sample of 1 kg reduces to 0.0625kg in 32 days. Thus, the correct option is D.
What is half-life?
The half-life of a radioactive isotope is the amount of time which it takes for one-half of the radioactive isotope to decay and lose energy. The time period for the half-life of a specific radioactive isotope is constant and it is unaffected by conditions and is independent of the initial amount of that radioactive isotope.
Iodine-131 has a half-life of 8 days. If a sample of 1kg of Iodine undergoes decomposition. Then, the time required to reduce the sample to 0.0625 kg of the original sample size can be calculated as:
With each half-life, the content of the sample reduces to half and thus,
At zero day, the amount of sample = 1 kg
After 8 days (one half-life), the amount of Iodine = 0.5kg or 500grams
After 16 days (two half-lives), the amount of Iodine = 0.25kg or 250grams
After 24 days (three half-lives), the amount of Iodine = 0.125kg or 125grams
After 32 days (four half-lives), the amount of Iodine available = 0.0625kg or 62.5grams.
Therefore, the correct option is D.
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If radioactive deoxythymidine triphosphate (dttp) is added to a culture of rapidly growing bacterial cells, where in the cell would you expect to find the greatest concentration of radioactivity? be mindful of what type of macromolecule dttp is incorporated into in living, growing cells.
All cells have the same genetic information, but do not express the same genes. How is this possible?
A. The differences are due to gene expression, which can be turned on and off.
B. Genetic material in a muscle cell is completely different from genetic material in a skin cell.
C. Genetic material is the same in all cells in the human body, except for reproductive cells.
D. Differences are due to major changes in genetic information from cell to cell.
Could you please explain to me this concept please? Please support your answer
Different cells express different genes due to gene expression regulation, even though all cells have the same genetic information. This is achieved through the selective transcription and translation of DNA into proteins necessary for a cell's specific function.
All cells have the same genetic information, but do not express the same genes. This is possible because of gene expression, which can be turned on and off depending on the cell's function and needs. The correct answer to the question is option A: The differences are due to gene expression, which can be turned on and off.
Essentially, each somatic cell in the body contains the same DNA, but not every gene is expressed in every cell. Different cell types, such as those in the eye and liver, need different sets of proteins to perform their functions. Therefore, only a subset of proteins is expressed in a cell, requiring the DNA to be transcribed into RNA, which then gets translated into protein. The expression of specific genes is highly regulated, ensuring that only the necessary genes for a particular cell type are active at any given time. This differential gene expression is what leads to the various cell types in the body.
To further illustrate, cell differentiation is akin to actors reading from the same movie script but only performing their own parts. Cells contain the same full complement of DNA, but only 'read' the parts relevant to their function, resulting in unique genetic expression. This process of specialization makes different cell types distinct from one another despite having the same genetic information.
what is the advantage of sexual reproduction
A. Two parents are required
B. Only one parent is required
C. It leads to genetically diverse offspring
D. It leads to genetically identical offspring
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Expiration (breathing out) is how the body removes excessive carbon dioxide from the blood. this is an example of ________.
Sort the examples into proper mechanisms of reproductive isolation.
prezygotic postzygotic
the inability of red and purple
sea urchins to mate due to
gametic incompatibility
a sterile zonkey formed from
the mating of a donkey and
a zebra
different mating calls for two
different grasshopper species
the death of a zygote after
few weeks of formation
PRE
1.) the inability of red and purple
sea urchins to mate due to
gametic incompatibility
3.)different mating calls for two
different grasshopper species
POST
4.)the death of a zygote after
few weeks of formation
2.)a sterile zonkey formed from
the mating of a donkey and
a zebra
Visible quartz and potassium feldspar grains are the main constituents in: