Answer:
Mouth
Explanation:
Digestion is the breakdown of food into small pieces that the body can absorb and use. Similarly, the process of digestion begins in the mouth by chewing (mastication). Thus, secretion of the saliva by the salivary gland dissolves some the chewed food and facilitates its passage through the digestive tract.
Which of the following characteristics of DNA-dependent DNA synthesis is NOT the same for DNA-dependent RNA synthesis?
Synthesis requires a template.
Initiation involves the recognition of a specific DNA sequence.
Initiation of synthesis requires a primer.
Synthesis is catalyzed in the 5′ to 3′ direction.
All of the choices given are the same for both DNA and RNA synthesis.
DNA and rna is not the same?
How is a species added to the endangered species list?
A species is added to the endangered list when the numbers of the species decrease drastically, making the species dangerously close to getting extinct
A) a moth has two alleles for spots. it can have brown or white spots. the brown spot allele frequency is 0.53. what is the white spot allele frequency?
Answer:
0.47 is the white spot allele frequency.
Answer: White spot allele frequency for moths is 0.47.
Explanation:
Hi, Alternative forms of a gene are called alleles; all sexually reproducing organisms have two alleles - one inherited from each parent.
The allele (version of the gene) for dark body color is dominant, which means that a moth possessing at least one such allele will have a dark body. To have a light body, the moth has to have both alleles for light body color.
Is the same case for the spots, white spot allele frequency for moths is 0.47.
Which of the following is most directly responsible for the coupling of excitation to contraction of skeletal muscle fibers?Acetylcholine.Action potentials.Calcium ions.Sodium ions.
Answer:
Calcium ions
Explanation:
The excitation-contraction coupling process is the process by which the electrical activation of muscles (the depolarization of the action potential) leads to the activation of contraction.
An action potential in the skeletal muscles or muscle excitation leads to Ca release from the sarcoplasmic reticulum via calcium channel protein. Released Ca regulates the contraction of the muscle.
Which describes an African butterfly species that exists in two strikingly different color patterns?a. sexual selectionb. disruptive selectionc. artificial selectiond. directional selectione. stabilizing selection
Answer:
The answer is b disruptive selection. Hope this helps.
The relationship between hemoglobin ____________ and po₂ is shown by an oxyhemoglobin dissociation curve.
Answer:
Saturation
Explanation:
Blood oxygen saturation is usually used to detect respiratory insufficiency, this saturation increases according to a hemoglobin dissociation curve.
The curve analysis shows that hemoglobin saturation is linked to partial oxygen pressure (pO₂). The higher the pO₂, the higher the oxygen saturation in the blood. The average saturation in a healthy human being is between 95% and 99%.
What is the probability that Jack will be a supertaster? What is the probability that Jill will be a supertaster?
The random variable X represents the number of adults surveyed until finding one who will watch the Super Bowl. It can take on values of any positive integer and follows a geometric distribution with a probability of success of 40%.
Explanation:The given scenario is a probability problem involving a geometric distribution, which is related to the number of trials needed to get the first success in a sequence of independent Bernoulli trials.
Define Random Variable X
a. The random variable X is defined as the number of adults we must survey until we find one who will watch the Super Bowl. Here, 'watching the Super Bowl' is considered a 'success'.
Values of X
b. The values that X can take on are all positive integers starting from 1, as we must survey at least one person and there is no upper limit to the number of people we might have to survey before we find a 'success'.
Distribution of X
c. The distribution of X is a geometric distribution. Since the probability that an adult will watch the Super Bowl is 40%, the probability mass function (pmf) of X is: P(X = x) = 0.6(x-1) * 0.4 for x=1, 2, 3, ... This is denoted as X~Geom(0.4).
Final answer:
The probability that Jack or Jill will be a supertaster, based on genetic inheritance patterns and the general population statistics, is 25%.
Explanation:
To determine the probability that Jack or Jill will be a supertaster, we reference given statistics that state approximately 25% of the population are supertasters. Additionally, from the given genetic information, we understand that if two parents are heterozygous tasters (Tt), their offspring have a 75% chance of being tasters (either TT or Tt) and a 25% chance of being non-tasters (tt).
Since 'supertaster' is likely correlated with tasting abilities linked to the PTC (phenylthiocarbamide) gene, we can assume that supertasters would have the TT genotype. Knowing this, we can infer since 50% of tasters are 'medium tasters', the remaining 25% might be 'supertasters', correlating with the TT genotype in a simple dominance scenario where T is the allele for tasting and t is the allele for non-tasting. Considering this, the probability that any individual, including Jack or Jill, being a supertaster would be 25%, assuming no other genetic or environmental factors influence this trait.
Suppose a rock on Earth is dropped in a vacuum and has an initial speed of 0 m/s. What is the rock's speed after 2 seconds, in m/s?
Answer:
Explanation:
There are many different equations which can be used to find acceleration, time, velocity, distance, etc. However, there are three variables we need to take into consideration for this question, initial velocity, acceleration due to gravity, and time.
The equation acceleration= velocity/time, can be used, and we need to remember that on Earth, acceleration due to gravity is calculated to be 9.8 m/s².
So using the equation:
a= v/t
v= a x t
v= (9.8 m/s²) x (2 s)
v= 19.6 m/s
The diagram below shows the structure of a segment of DNA.
--
Which of the following best describes the component of DNA labeled with an x in the diagram?
A.
a series of codons
B.
nitrogenous bases
C.
chromosome pairs
D.
sugar and phosphate
Answer:
B. nitrogenous bases
Explanation:
Nitrogenous bases are chemical compounds formed by slightly alkaline rings that contain nitrogen. Together with sugar and a phosphoric acid, they make up ribonucleic acid (RNA) and deoxyribonucleic acid (DNA). It is through these nitrogenous bases that the two strands of DNA are linked. This is exactly what we can see in the picture.
There are five types of bases, which are classified into two groups:
Purine or purine nitrogenous bases: adenine (A) and guanine (G); Pyrimidine or pyrimidine nitrogenous bases: cytosine (C), thymine (T) and uracil (U).Pyrimidine bases are derived from pyrimidine and are formed by a ring (hexagonal) of carbon and nitrogen. The purine bases are derived from purine, are larger and have two rings (one hexagonal and one pentagonal) of carbon and nitrogen.
Photosynthesis is to chloroplasts as cellular respiration is to
Answer:
Products of photosynthesis are used in cellular respiration
Explanation:
Photosynthesis is a process performed by the plants (also some algae and bacteria) in which the energy of sunlight is transformed into chemical energy usable by those plants. Necessary components of this set of reactions are sunlight, water and CO2, while resulting products are glucose and oxygen. Products of photosynthesis are then used in the metabolic processes known as cellular respiration. During the cellular respiration, glucose and oxygen are used for the production of ATP, CO2 and water. Cellular respiration is performed in mitochondria of all living organisms.
Photosynthesis occur in the chloroplast, membrane organelles with photosynthetic pigments (such as chlorophyll).
Photosynthesis occurs in chloroplasts and converts light energy to chemical energy, while cellular respiration takes place in mitochondria, converting glucose into ATP. Thus, the answer to the comparison is 'mitochondria'. These processes form the carbon-oxygen cycle, which is vital for life energy transformations.
Photosynthesis is comparable to cellular respiration in that both are essential processes that take place in cells to make chemical energy available for life. While chloroplasts are the site of photosynthesis in plant cells, where light energy is converted to chemical energy and stored in the form of glucose, mitochondria are the sites where cellular respiration occurs. In cellular respiration, the chemical energy stored in glucose is converted back into ATP, which is a usable form of chemical energy for cells.
Consequently, responding to 'Photosynthesis is to chloroplasts as cellular respiration is to what?', the answer is mitochondria. Both chloroplasts and mitochondria work in tandem to support the life processes of plants. They together form part of the carbon-oxygen cycle, showcasing a biological, cyclical harmony, which is essential for energy transformation and sustaining life.
perimenopause ____.
a. is marked by limited changes in reproductive hormones
b. occurs five to eight years after the final menstruation
c. is the period after a woman's last menstruation
d. is the period from a woman's first irregular cycles to her last menstruation
e. is marked by only trivial symptoms
Answer:
a. is marked by limited changes in reproductive hormones
Explanation:
Alguem me ajuda com a primeira lei de Mendel?? Sobre qual era os cuidados que ele usava ao cruzar dois tipos de plantas
La primera ley es llamada la ley de la uniformidad de los híbridos de la primera generación filial. Y esta dice que al cruzar dos variedades cuyos individuos tienen razas puras ambos homocigotos para un determinado carácter), todos los híbridos de la primera generación son similares.
Certain genes have apparently unusual inheritance patterns. For instance, in the mouse autosomal gene H19, only the copy inherited from the mouse's mother is expressed. Conversely, in the mouse autosomal gene Igf2, only the copy inherited from the mouse's father is expressed. The consequence of this is that imprinted genes are expressed as if they were present in only one copy, even though there are two copies of each of these genes in each cell. What process or processes are responsible for this phenomenon? (Select all that apply.)None of the answer options is correct.combinatorial gene regulationepigenetic inheritanceX-chromosome inactivationMendelian inheritance
Answer:
epigenetic inheritance
Explanation:
This phenomenon is known as genomic imprinting. Epigenetic control and inheritance is the basis of genomic imprinting: DNA methylation and histone methylation lead to inactivation (silencing) of a certain genes. The epigenetic pattern is imprinted and maintained in parents.
As a consequence of genomic imprinting, specific genes from only one parent are expressed. This is different than Mendelian type of inheritance in which in diploid cell one gene is from father while another is from mother.
A future offspring has just been conceived. When does it have the highest level of potency?
A. Unipotency
B. Multipotency
C. Pluripotency
D. Totipotency
Answer:
Option D, Totipotency
Explanation:
Totipotency is the ability of a cell to differentiate into all other cells with in an organisms. A fertilized egg which has the potential to give rise to any cell with in an organism is called a totipotent fertilized egg. These totipotent cells are produced in large amount during the initial stages of embryonic development when maximum development is required and also they have the ability to form an entire organisms.
Thus option D is correct
Question 21(Multiple Choice Worth 3 points)
(12.05 MC)
A suspect is brought in for questioning about a string of burglaries. This same suspect has been questioned by police before for other crimes. After about a half-hour of questioning, the 17- year-old suspect confesses to the crime. What would make you question the accuracy of this confession the most?
The suspect has only been questioned for a short time
The suspect was probably confused about the process
The suspect is under 18 years of age
The suspect wouldn't admit to one crime and not others
The suspect has only been questioned for a short period of time, cuz the second answer, he has been questioned before, the third one doesn’t make sense cuz it’s just age and fourth doesn’t make sense
Answer:
C - The suspect is under 18 yrs of age
Explanation:
Confessions after long periods of questioning might be used, however, this was only 30 minutes. The suspect has been questioned previously, so he knows the process. He is in fact under the age of 18, and not considered an adult, and juvenile confessions are commonly false. PLUS - I got it right on the test!
Which types of macromolecules are common to both organisms and viruses?
A.)proteins and nucleic acids
B.)proteins and carbohydrates
C.)nucleic acids and carbohydrates
D.)lipids and proteins
Answer: A) Proteins and nucleic acids
Explanation:
Proteins and nucleic acids
Which would be the best title for these notes? Echolocation Ultrasound Technology Digital Signal Analog Signal
Answer:
The correct option should be ultrasound technology (option B) because it is related to sonographers or ultrasound technicians. they are most likely with while pregnancy but they have plenty of uses, such as evaluating and diagnosis, many medical treatment for elderly patients.
Hope this helps!
The best title for the given notes will be Ultrasound technology. The correct option is B.
What is ultrasound?Ultrasonography, often known as sonography or diagnostic medical sonography, is a type of imaging that employs sound waves to create pictures of structures within your body.
The photos can give useful information for diagnosing and treating a wide range of illnesses and ailments.
The missing notes in the question are:
A student took notes in class. - Uses high frequency sound waves - Creates images from echoes - Has many applications - Medical - Pregnancy - Kidney stones - Cancer - Injury identification - Other - Cleaning - Identification of objects - Breakdown of bacteria - Production
The best title for the given notes will be Ultrasound technology.
Thus, the correct option is B.
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All the offspring of a cross between a black-eyed mendelian and an orange-eyed mendelian have black eyes. What is the expected phenotypic ratio of a cross between two orange-eyed mendelians?
Answer:
1:0 orange eyes:black eyes
Explanation:
If black-eyed mendelian and an orange-eyed mendelian give all the offspring with black eyes, this means that the black eye allele is dominantt over orange eye. So, if we name the gene for the eye color with A, the genotypes of the parents would be AA (black eyes) and aa (orange eyes).
P: AA x aa
F1: Aa Aa Aa Aa (all heterozygous with black eyes).
Cross between two orange-eyed mendelians:
P: aa x aa
F1: aa aa aa aa all of them with orange eyes
Select the answer option that lists the levels of genetic information in order from smallest to largest.
gene; chromosome; DNA strand; genome
DNA strand; gene; genome; chromosome
DNA strand; chromosome; gene; genome
gene; DNA strand; chromosome; genome
genome; gene; chromosome; DNA strand
Answer:
gene; DNA strand; chromosome; genome
Explanation:
Gene is a sequence in DNA molecule that has a function. It codes for a molecule, usually protein that performs a certain function within the cell. It carries the information that is necessary for the gene expression. Gene is copied into mRNA molecule during the process of transcription. mRNA is used for the protein synthesis (translation).
DNA is packed into chromosomes during the preparation for cell division. Chromosome is highly condensed form of chromatin.
Genetic is a whole genetic material of an organism.
Which of the following statements are true concerning the eye?The far point of the normal eye is infinity.Astigmatism refers to a defect in which the surface of the cornea is not spherical. Instead, it is more sharply curved in one plane than another.Farsightedness can be corrected with a diverging lens.Nearsightedness can be corrected with a diverging lens.The hyperopic eye focuses rays from an object at infinity in front of the retina; the myopic eye focuses rays from an object at infinity behind the retina.
Answer:
The far point of the normal eye is infinity
Astigmatism refers to a defect in which the surface of the cornea is not spherical. Instead, it is more sharply curved in one plane than another.
Nearsightedness can be corrected with a diverging lens
Explanation:
A normal eye has its far point (at infinity) and its near point (about 25cm in front of the eye).
Astigmatism is an eye imperfection which refers to the curvature of the cornea or lens. This vision condition is characterized by the irregularly shape of the cornea or lens (not equally curved in all directions). As a consequence, refractive error occurs which appears as nearsightedness (myopia-inability to focus on distant objects) or
farsightedness (hyperopia-inability to focus on nearby objects).
The far point of a normal eye is infinity and astigmatism is a defect of the cornea. Myopia (nearsightedness) is corrected with a diverging lens, while hyperopia (farsightedness) is corrected with a converging lens. For a hyperopic eye, rays from an object at infinity is focused in front of the retina, while for a myopic eye, these rays are focused behind the retina.
Explanation:Here are the true statements about the eye and vision correction:
The far point of the normal eye is indeed infinity. This means that a normal eye can clearly see objects that are at an infinite distance away.Astigmatism is a defect where the cornea's surface is not spherical, being more sharply curved in one plane than in another. This irregularity can lead to blurred or distorted vision.Myopia or nearsightedness is a vision defect where distant objects seem blurry, while close objects appear clear. Contrary to the statement, it's corrected using a diverging lens.Hyperopia or farsightedness is a condition in which far objects are seen clearly, while close ones appear blurry. This condition is corrected with a converging lens, not a diverging one.The hyperopic eye indeed focuses rays from an object at infinity in front of the retina. Conversely, the myopic eye focuses rays from an object at infinity behind the retina.Learn more about Vision Correction here:https://brainly.com/question/31914744
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which statement correctly describes the relationship between bones and muscles
a. a muscle can both push and pull a muscle, causing it to move
b. bones can move without the aid of muscles
c. moving a bone back and forth requires the action of at least two muscles
d. a bone needs only one muscle to move it back and forth
Answer:
C
Explanation:
Bones are moved at the joints by muscles. It requires at least two muscles acting antagonistically on the bone to move the joint. When one muscle contracts, the other relaxes. Muscles are attached to bones through tendons. An example is the humerus (bone of the upper arm) is moved at the elbow by the antagonistic action of the biceps and triceps.
a conservation plan could proceed with a single 20-square kilometer habitat preserve or with two habitat perserves,measuring a total of 20 square kilometers combined. Which perserve format would support more species
Answer:40
Explanation:20+20=40
NEED HELP ASAP
Why is ice so important to the survival of the polar bear in the arctic?
A. The polar bears can’t out swim the seals, so they sit quietly on an ice platform and attack the seals when they come
up for air.
B. The polar bears are hibernating for longer periods of time, so they are not able to get the food necessary to survive.
C. The sea ice is important because the polar bears use the ice to go on their migration to warmer land areas
D. The sea ice provides a place for the polar bears to take a nice nap in the sunshine.
There are a couple reasons the ice is important to polar bears, but given the choices you have the correct one would be:
A. The polar bears can’t out swim the seals, so they sit quietly on an ice platform and attack the seals when they come up for air.
What are cells where the genetic material is contained in membrane-bound nuclei?
Answer:
Eukaryotic cells
Explanation:
There are two main types of cells among living organisms:
Eukaryotic cell (plants, animals, fungi) which is more compound, conntains nucleus with genetic material in it, membrane-bound organelles (mitochondria, Golgi apparatus, lysosomes etc). Because of their complex structure, the process within such cells are often more comlex then those in prokaryotes. Eukaryotic organisms are usually multicellularProkaryotic cell is simple cell found in Archea and Bacteria kingdom. It doesn't have nucleus neither membrane-bound organelles. Genetic material of these cell is located within the cytoplasm together with proteins and metabolites. First living cell was prokaryotic cell. Organisms that are prokaryotic are usually unicellular.What could be a result of an injury to the dorsal column?
1....loss of sensation to pressure and touch
2...loss of control over all involuntary movements
3....inability of the body to maintain homeostasis
4....inability to regulate the sleep-wake cycle
5....loss of motor control
loss of sensation to pressure and touch
Answer is 1
Scientists in the united states, europe, and africa have now suggested that the hippopotamus is a relative of the
Answer: Hippos spend lots of time in the water and now it turns out (or researchers argue), they are the closest living relative to whales. ... Thewissen says that whales are more closely linked to an extinct pig-like animal, often known as India's pig or Indohyus, while hippos are closely related to living pigs.
Explanation:
What tube connects the mouth and the stomach
Answer:
The esophagus.
Explanation:
Which is a long tube that connects the mouth to the stomach
How are girls affected by changes in friendships?
A. Girls are only affected by changes in friendships with their one or two closest friends.
B. Girls are highly resistant to changes in friendships.
C. Girls may be more easily hurt and distraught by frequent changes in friendships. D. Girls are rarely affected by changes in friendships.
c. girls may be more easily hurt and distraught by frequent changes in friendships
Generally, girls may be more hurt and distressed by frequent changes in friendships as they highly value emotional bonds. However, it's important to note everyone deals with these changes differently depending on personal factors like resilience, support system, and coping strategies.
Explanation:
Based on various studies, option C is generally more accurate: Girls may be more easily hurt and distraught by frequent changes in friendships. This does not mean all girls will react the same way, but on average, changes in friendships can significantly impact girls, especially during their formative years. Girls often value close bonds and shared emotions in friendships, and disruptions of these connections can lead to feelings of hurt, betrayal, and loss. Moreover, changes in friendships could influence their self-esteem and overall emotional well-being, which in turn may potentially affect their academic performance and other aspects of their lives.
However, it's important to acknowledge that everyone, regardless of gender, has a unique way of dealing with changes in friendships. The individual's resilience, support system, and personal coping strategies play a crucial role in how they navigate through these changes.
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Which of the following occurs in the E site of the ribosome during translation?An uncharged tRNA is ejected from this site as the ribosome slides to the next codon.An incoming charged tRNA binds to this site.None of the other answer options is correct.The tRNA carrying the growing polypeptide moves to this site as the ribosome slides to the next codon.
Answer:
An uncharged tRNA is ejected from this site as the ribosome slides to the next codon
Explanation:
During the process of translation, ribosomes play a major role in connecting mRNA codons with tRNA anticodons. Ribosomes are composed of two subunits which consist ofproteins and rRNA. The tree sites of ribosomes are:
P site or peptidyl site-this site binds to the tRNA which holds the growing polypeptide chain.A site or acceptor site-this is a site of peptide bond formation between the growing polypeptide and the next incoming amino acidE site or exit site-the site for the final binding of t-RNA .Describe the difference between a closed and an open circulatory system.
The main difference between open and closed circulatory system is the way blood flows in an organism.