The speed of sound is altered by the?
A. pitch of sound
B. loudness of the sound
C. device producing the sound
D. material transmitting the sound
The energy released when sugar molecules are broken down is transferred to bonds in which molecule
If every cell in the body gets the same dna, how do the cells of an embryo make different structures and take on different roles? (select all that apply.)
a. different transcription factors are active in different cells.
b. different transcription factors are encoded in the dna.
c. genes are spliced differently in different cells.
d. translation is regulated so that different cells may make more of certain proteins.
e. some cells lack ribosomes while others use them. f. cells delete a set of unused genes from their chromosomes.
Every cell in the human body shares a common starting point: a fertilized egg. As a result, all of our cells theoretically contain the same DNA — ignoring specific cell types, such as erythrocytes and gametes, and the cumulative effects of DNA changes through mutation and telomere shortening. Despite this, each cell is unique, with one cell type completely dissimilar to another, not to mention being totally different to the original fertilized egg. Why?
The reason is that each cell — whether a neuron, skin cell, or a photoreceptor cell — uses the genes that it has differently. All cells have the same set of genes (~20,000 in humans) but it is up to the individual cell whether each gene is turned on or off.
Why is it important to watch for increased redness, swelling and pain after a cut or abrasion has been cleaned and bandaged?
Jacob skips, climbs ladders, and is able to change direction very quickly while running. his gross-motor skills are normative for a _______-year-old child. 2 4 3 5
The number of kilocalories in a food indicates the amount of _____.
Answer:
energy
Explanation:
You are assessing sigred for metabolic syndrome. whihc of parameters is indicitive of this syndrome?
A 40 year-old woman who is 25 weeks pregnant with her second child, is seeing her obstetrician. she is worried about decreased fetal movement. during the examination the obstetrician detects bradycardia in the fetus. what icd-10-cm code(s) is/are reported?
Consider the haplotype for the bacterial lac operon: i-o+z+. there is also a plasmid with the haplotype: i+ocz-. for all of the questions below, assume there is no glucose and no inducer. repressor protein will be bound to both operators in this cell:
a. True
b. False
Ans. 'false.'
Lac operon or lactose operon in bacteria represents a set of genes, responsible for the transport and metabolism of lactose by bacterial cells.
The 'i⁺' represents a wild-type regulatory gene, which expresses regulatory protein and transcription is regulated, while 'i⁻' represents a mutant regulatory gene that cannot make regulatory protein.
The 'o⁺' represents a wild-type operator sequence that can be repressed by a functional regulatory protein, while 'oc' represents a defective operator, by which the repressor protein cannot bind and thus, transcription is always on (constitutive expression).
The z⁺ represents wild-type structural gene that gets expressed, when transcription is on, while z- represents mutant and defective structural gene, thus, no lactose metabolism will occur.
Hence, in given bacterial cell, the repressor protein cannot not bind to both operator as operator of 'i+ocz⁻' haplotype represents a constitutive operator, by which repressor protein cannot bind and operon is always on.
Thus, the given statement is 'false.'
Smell is unique among the senses in that it will often trigger vivid _____.
The program that determines the appropriate course of action in the event an interrupt occurs is called the
which bet describes the lysogenic cycle
Why do we need carrier proteins for steroid hormones?
How are organelles in a cell like organs in a human body?
Answer:
The organelles in a cell are like organs in a human body. This is because organs in a human body help the whole body operate as one smooth function like a cell has many different organelles that help carry out important processes for the cell to run smoothly as one organ. Organs in a body and organelles in a cell both depend on each other to function work together to keep things alive.
Lincoln is a 27-year-old man who has been experiencing strange medical symptoms over the past year. He knows something is wrong, but doctors are having a hard time piecing together the clues. Previous doctors’ notes report: Lincoln has noted a gradual enlargement of his body tissue. He is long past puberty, but the bones of his face and jaw seem to be growing thicker and changing shape. Even his hands and feet look larger. Lincoln has put on a considerable amount of weight in the past year. His diet has not changed and he still plays basketball two times a week with his friends. He’s getting plenty of rest, but he still feels sluggish. Lincoln and his wife have been trying to get pregnant for over a year. Worried about their chances, they decide to visit the doctor. Routine lab tests reveal that Lincoln has an extremely low sperm count. Most recently, Lincoln has reported some problems with his vision. He has noticed that images are blurry and that he sometimes sees double. Doctors are baffled by what Lincoln is reporting.
Final answer:
Lincoln's symptoms, including the enlargement of body tissue and visual changes, suggest acromegaly due to a pituitary tumor. He should be evaluated by an endocrinologist for proper diagnosis and treatment.
Explanation:
Lincoln's symptoms suggest he may be suffering from a hormonal disorder that is affecting his physical appearance, energy levels, and reproductive capacity. The gradual enlargement of body tissue, especially noticeable growth in the bones of his face and jaw, as well as his hands and feet, could indicate acromegaly, which is typically caused by an overproduction of growth hormone, often due to a benign tumor on the pituitary gland.
The low sperm count and issues with his vision, particularly blurry vision and double vision, can be associated with a pituitary tumor pressing against the optic chiasm. Lincoln should be evaluated by an endocrinologist who can request an MRI to check for a pituitary tumor and conduct further hormonal assessments to confirm the diagnosis.
Although animals share many common characteristics, there is also a great amount of diversity found in animals. Which animals are ectothermic, obtain dissolved oxygen in water through gills, have scales, have fins, and live in water? A) Fish B) Reptiles C) Mammals D) Amphibians
Fish are ectothermic, have scales and fins, obtain dissolved oxygen from water through their gills, and live in it. So, the correct option is A.
What are Ectothermic animals?The body temperature of cold-blooded, ectothermic animals is regulated by their surroundings. Many animal species, such as reptiles, amphibians, fish, and some invertebrates such as insects, arachnids, and crustaceans, are ectothermic.
The gills of fish, which draw oxygen from the water as it flows over them, are how they take up dissolved oxygen from the water. Fish have skin that is covered with scales that serve as a means of protection and to reduce friction when traveling through water. Additionally, they have fins, which are used for swimming, steering, and maintaining balance. Fish are water-dwelling organisms that have a number of adaptations to the water environment.
So, the correct option is A.
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Polycystic Ovary Syndrome (PCOS) is a condition characterized by excessive estrogen. The model shows the effects on the eggs in the ovaries. Based on what you see in the model, what symptoms would you expect a woman with PCOS to have?
Answer:
Fewer menstrual cycles.
Explanation:
The formation of cysts inhibits ovulation, decreasing the release of hormones necessary for menstrual cycles.
PLATO answer
Do you think that three calls are enough to determine the maximum intensity of typical howler monkey calls?
To determine the maximum intensity of howler monkey calls, a larger sample size and multiple recordings are needed. Researchers analyze a significant number of calls to obtain more accurate and representative data. Considering factors other than intensity, such as pitch and duration, can provide valuable insights into howler monkey communication behavior.
Explanation:Three calls may not be enough to determine the maximum intensity of typical howler monkey calls. It is important to have a larger sample size to obtain accurate and representative data. In order to determine the maximum intensity, researchers usually carry out multiple recordings over an extended period of time and analyze a significant number of calls.
By analyzing a larger dataset, researchers can account for variations in intensity due to factors such as distance from the microphone, background noise, and individual differences among the monkeys. This ensures more reliable and comprehensive results.
In addition, it is also beneficial to consider factors other than intensity when studying howler monkey calls, such as pitch, duration, and frequency modulation. These additional parameters can provide valuable insights into the communication behavior of howler monkeys.
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Which statement is true about the model of the electromagnetic spectrum? It helps change the frequencies of light. It helps compare wavelengths of light. The color of light waves can be changed using the model. The intensities of light waves can be decreased using the model.
It helps compare wavelengths of light. Electromagnetic spectrum models that light is composed of various electromagnetic radiations of different frequencies. These range from the high-frequency gamma rays to the lowest frequency radio waves. Visible light occurs at 300 THz in the magnetic spectrum.
Answer:
B.) It helps compare wavelengths of light.
Explanation:
Modeling the Electromagnetic Spectrum consists of a demonstration which illustrates the power of models, a pre-assessment activity on student understanding of exponents, an activity for students to construct and compare a different model of the spectrum than the model commonly used in textbooks and on posters, and an assessment task for students to construct their own models of the electromagnetic spectrum.
Which topics would be most important for you to understand if you wanted to be certified as a lifeguard? Check all that apply. developing evacuation plans diversifying sources landscaping Florida-friendly beaches saving people caught in rip currents identifying signs of oncoming tsunamis
Answer:
A, D, E ( developing evacuation plans ) ( saving people cuaght in rip currents ) (identifying signs of oncoming tsunamis)
Explanation:
Trust me, i got it white on the quiz!
You enroll your preschool-age daughter in ballet class. At first, all of the children in the class are clumsy, and their movements are awkward. After several months of weekly lessons, you notice that most of the children are moving smoothly through their dance routines, but your daughter’s movements are still rather awkward. You talk with the instructor and ask her if maybe your daughter isn’t cut out for ballet, and should you withdraw her from class. The instructor encourages you to have her continue. From what you’ve learned this week, what is a physiological basis for having your daughter continue?
The physiological basis for having your daughter continue is through the way she moves in which up until now, she hasn’t been moving smoothly like other child but rather than awkward. Through this, the mother would likely think that she should let her daughter drop out from that class because she doesn’t seem to have any improvement and if she were to have an improvement with her movements, then the mother would likely let her daughter to continue.
Many of the proteins in the human body are enzymes that catalyze chemical reactions. What is the relationship between enzymes and activation energy?
Answer:
When an enzyme catalyzes a reaction, it decreases the activation energy of the reaction.
Enzymes are catalysts that lower the activation energy of chemical reactions in the body, allowing reactions to proceed more rapidly without altering the free energy of the reactants or products.
Explanation:The relationship between enzymes and activation energy is significant in biochemical reactions. Enzymes are catalysts, predominantly proteins, that speed up chemical reactions in cells by lowering the activation energy required for the reaction to occur. Activation energy is the threshold level of energy needed to break bonds in reactants to trigger a chemical reaction. By binding to reactant molecules at an active site, enzymes reduce the activation energy needed for the reaction, thus increasing the rate at which the reaction occurs without altering the free energy (ΔG) of reactants or products, thereby not affecting whether a reaction is exergonic (spontaneous) or endergonic.
A 6-year-old boy has marked edema of the legs, accumulation of fluid in the abdomen, and a low blood serum albumin and total serum protein. his urine contains large amounts of protein. what is the most likely cause of edema?
Answer:
The most likely cause of the condition is the diminished serum albumin resulting from excess loss in the urine that declines plasma osmotic pressure, which permits excess fluid to leak from the capillaries.
Explanation:
In the given case, the patient is suffering from nephrotic syndrome. In the condition, increased excretion of albumin takes place that leads to an overall decrease in serum albumin. Albumin refers to the protein primarily taking part in sustaining the plasma oncotic pressure, that is, it is accountable in maintaining the fluids in the vascular space.
The colloid osmotic pressure or the oncotic pressure refers to a kind of osmotic pressure facilitated by proteins, mainly albumin. In the condition due to the loss of albumin, the fluids in the vasculature leaks towards the interstitium resulting in edema.
what does the increase in incidents of polar bears visiting human settlements indicate
Which is true regarding the mediated transport of a substance across a plasma membrane? it depends upon the binding of that substance to a specific site on the membrane protein. it depends upon movement of proteins from one side of the membrane to the other. it always increases in direct proportion to the increasing concentration of the substance on one side of the membrane. both "depends upon the binding of that substance to a specific site on the membrane protein" and "depends upon movement of proteins from one side of the membrane to the other" are correct. all of the choices are correct?
An individual has a nutrient deficiency due to a poor diet and is missing a specific amino acid, how would this affect the ability of the cell to synthesize particular proteins?
what is the connection between the different structures ferns use to reproduce?
A. The fertilize egg produces spores.
B. The eggs are fertilized by the spores.
C. The spores grow into new individuals by asexual reproduction.
D. The spores grow into male and female gametophytes that produce eggs and sperm
The answer is D. In the alternation of generation by plants and algae, gametophyte phase is the haploid phase. The gametophyte sprouts from spores that are produced by sporophytes. The gametophyte produces gametes that fuse to form a zygote. The zygote grows into a prothallus that represents the short diploid phase in ferns
which of these is best described as being on the arm of a spiral?
A. the moon within earth's orbit
B.earth within the solar system
C. the milky way galaxy within the universe
D.the solar system within the milky way galaxy
C. the Milky Way galaxy within the universe.
Explanation:In the event that you gaze upward on a dim, crisp evening, endlessly from city lights, you may see a wide band of blackout light extending above you, stiller than a cloud and sparkle with thickly stuffed stars. Deciphered from the Ancient Greek as "Milky Way" for taking after spilled milk on the sky, that band of light is the focal point of our cosmic system.
At its inside, encompassed by 200-400 billion stars and imperceptible to the human eye and by direct estimations, lies a super massive dark opening called Sagittarius A* or Sgr A* for short. The Milky Way has the state of a winding and pivots around its middle, with long twisting arms encompassing a marginally protruding plate.
Which of the following factors do you think can affect the size and structure of a population?
the number of individuals who enter a population
the number of individuals who exit a population
limitation of resources
natural events
human activity
Answer:
I reckon the most appropriate one is limitation of resources
Where are chromosomes located? in nucleic acids in ribosomes in the nucleus
Answer:
nucleus
Explanation:
Chromosomes are structures composed of DNA that, in turn, carry the genes of a living being, responsible for defining the particular physical characteristics of each individual.
Chromosomes are located in the nucleus of the cells that make up the living being. Human beings have 46 chromosomes, divided into 23 pairs, of which 44 are autosomes and 2 are sexual.
The chromosomes that form pairs are called homologous and are called diploid cells (2n).
All the genetic information of a given individual, such as hair color, eye color, physical structure, and other hereditary characteristics, are present in the person's DNA. Chromosomes serve to store all this information, condensing the genetic material so that it fits inside the cells.