Which statement best explains how natural selection determines differential survival when a population is under resource stress?
A.
Individuals with favorable traits are more likely to survive and reproduce than those with less favorable traits.
B.
Groups of individuals whose traits are very similar are more likely to survive and reproduce than groups whose individuals are genetically diverse.
C.
Groups whose individuals are generalists are more likely to survive and reproduce than groups of individuals who are specialists.
D.
Individuals who possess more common genotypes are more likely to survive and reproduce than those who possess rarer genotypes.
Answer: The correct answer is- A. Individuals with favorable traits are more likely to survive and reproduce than those with less favorable traits.
Natural selection is an evolutionary process according to which individuals that can better adapt to the changing environmental conditions, survive and produce more of their kind through reproduction.
In other words, individuals with beneficial/ favorable traits ( for survival and reproduction) are selected and others are eliminated. In this way, natural selection determines differential survival when a population is under resource stress.
Thus, option A) is the right answer.
Which of these four gene parts should allow the construction of the most accurate phylogenetic tree, assuming that this is the only part of the gene that has acted as a reliable molecular clock?]?
what reproductive structure in a female mammal that produces sex cells/10652656/660a651d?utm_source=registration
The ovaries. The female gonads produce an ovum in every menstrual cycle. The ova travels down the fallopian tube where if fertilized by a sperm, becomes a zygote and implants in the uterus. The luteinizing hormone produced by the pituitary gland stimulates the release of ova from the ovaries.
Where in the human body would you expect to find large numbers of dividing cells?
Large Figures of dividing cells can be set up in the bone gist, skin, intestinal filling, and hair follicles due to their need for constant renewal and form. These apkins contain fleetly dividing cells and are therefore more susceptible to treatments that target cell division.
Cancer can start nearly anywhere in the mortal body, which consists of trillions of cells. typically, mortal cells grow and divide to form new cells as the body needs them. When cells come old or damaged, they die, and new cells take their place.
As a result, areas where you would anticipate to find large figures of dividing cells include apkins that bear frequent renewal and form. For illustration Bone gist where new blood cells are constantly produced. Skin- skin cells are continually being replaced.
Intestinal filling- cells in the digestive tract are renewed regularly due to the wear and tear and gash of digestion.
Hair follicles cells in hair follicles divide fleetly, leading to hair growth. This rapid-fire division is also why these apkins are more susceptible to radiation and chemotherapy treatments, which target snappily dividing cells.
What spf sunscreen should you use to exercise outside?a. at least 15?
Answer: Atleast 15 spf
Explanation:
SPF can be defined as the sun protection formula which is applied on the part of the part of the body which is going to be exposed in the sun.
Before 15 minutes to going out in the sunlight, sun protection formula should be applied on the bare skin.
The Different types of SPF protects different percentage of sunlight and the body is protected from the harmful UV rays of the sun that tans the body, spoils the texture of the skin and protects from skin cancer.
A spf 15 will protect 93% of the sun rays falling on it which is good if going out for exercise.
when running a gel you need to have a positive control and negative control. what do these mean and what are they each used for?
Positive control: Known sample to validate gel and electrophoresis conditions. Negative control: No DNA to check for contamination.
In gel electrophoresis, a positive control and a negative control are essential components used to validate the experimental procedure and interpret the results accurately.
A positive control typically consists of a known sample or DNA fragment with a confirmed size or characteristic that is expected to migrate to a specific position on the gel. This control helps verify that the gel and electrophoresis conditions are suitable for DNA separation and that the experimental setup is functioning correctly. If the positive control produces the expected result, it confirms that the experimental conditions are optimal for detecting DNA fragments of interest.
On the other hand, a negative control contains a sample or buffer lacking the target DNA or any DNA at all. Its purpose is to detect potential contamination or unintended DNA amplification. If the negative control does not yield any bands on the gel, it indicates that there was no contamination introduced during the experimental procedure. This ensures the reliability of the results by ruling out the possibility of false-positive signals caused by contamination.
In summary, the positive control confirms the functionality of the experimental setup and validates the expected migration of DNA fragments, while the negative control verifies the absence of contamination and helps prevent false-positive results. Together, these controls ensure the accuracy and reliability of the gel electrophoresis experiment.
PLEASE HELP!!!
Which of the following effects of acid deposition most affects human health?
A) Acid rain damages human skin.
B) Acids remove lime from the soil
C) Acids remove nutrients from the soil and cause malnutrition in crops.
D) Acidic soils Liberate toxic metals.
The correct answer is option C- Acids remove nutrients from the soil and cause malnutrition in crops.
Acid rain is defined as the rain which is polluted with atmospheric pollutants released mainly from coal burning and other fossils fuel. Acid rain is affecting our lives mainly via polluting water and crops.
It affects both the quantity and quality of crops. It liberates the nutrients from soil and releases them from water which makes them unavailable for the crops to take hence cause malnutrition in crops.
The damage on crops depends upon the strength and intensity of acids present in acid rain.
Explain how a white fence appears to be white. In your answer, include the colors of light that your eye detects and tell how your brain interprets those colors.
A white fence appears to be white due to the presence of photoreceptors in the retina.
What is the retina?The retina is a layer of nervous tissue which is stimulated by sunlight, thereby leading to the vision of colors.
This layer (retina) has two types of photoreceptors, cone cells and rod cells.Cone cells can detect different spectra of photons and thus they are responsible for color vision.
In conclusion, a white fence appears to be white due to the presence of photoreceptors in the retina.
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According to the Köppen climate classification system, _____.
dry climates include large savannas
highland climates have very low mean temperatures
humid mid-latitude climates have little precipitation
humid tropical climates do not experience winters
Humid mid-latitude climates have little precipitation occurs in koppen classification. Thus, the correct option is C.
What is Koppen climate classification system?According to Koppen climate classification system, humid tropical climates do not experience winter. The koppen climate classification system uses mean monthly and annual values of precipitation and temperature to classify a climate.
The humid tropical climate classification has a mean temperature of above 18 degrees Celsius and the precipitation can be more than 200 cm/year. This climate does not experience winter.
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Which term is used to classify amino acids in the diet? essential unessential partially essential moderately essential rarely essential?
Explain how production of mrna relates to gene expression. think back to what you have learned about protein synthesis in your bms courses.
Answer:
Explanation: Genes are sequences of Deoxyribonucleic Acid (DNA) that contain the information to produce or synthesize the various proteins necessary for cell survival. The process by which proteins are produced is called gene expression and includes:
1. A first step in which a copy of the gene is generated (synthesized) by an enzyme called Transcriptase. This enzyme produces (synthesizes) a molecule of Ribonucleic acid (RNA) with the same information of the gene. This molecule that transmits the gene message is called messenger RNA (mRNA).
2. In the second step the mRNA is read by other enzymes that use this information to make the corresponding protein.
Then mRNA is an intermediate player in gene expression process that finally results in the synthesis of a protein.
If A, B, and C represent the dominant alleles of a polygenic trait, then which of the following genotypes would result in the most extreme phenotype?
AABBCC
AaBbCc
AABbcc
Aabbcc
Please help!!
The answer to this is AABBCC because if you are dealing with a dominant trait then the letters are going to be captialize but if you are dealing with a recessive trait and a dominant trait it will be AaBbCc.
What is Genotype?The type of variant present at a specific locus (i.e., region) in the genome is scored by what is known as a genotype. Symbols can be used to symbolize it.
The actual DNA sequence, such as CC, CT, or TT, can also serve as a representation of a genotype. In a single experiment, the genotypes at millions of sites in a genome can be determined using DNA sequencing and other techniques.
There might be misspellings, just like in the sentence example. Perhaps the word "was" is spelled "waz" in the example sentence's book. A genotyping error in DNA is commonly referred to as a mutation and may have negative effects on one's health and well-being.
Therefore, The answer to this is AABBCC because if you are dealing with a dominant trait then the letters are going to be captialize but if you are dealing with a recessive trait and a dominant trait it will be AaBbCc.
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Lipids differ in their degree of saturation or unsaturation due to the number of
Which term describes the number of waves that pass a given point in a given time?
A. Crest
B.Frequency
C. Trough
D. Wavelength
How does an organism pass its characteristics onto its offspring?
A client, age 87, with major depression undergoes a sixth electroconvulsive therapy (ect) treatment. when assessing the client immediately after ect, the nurse expects to find:
The nurse found a transitory short and long term memory loss and confusion. Electroconvulsive therapy is a kind of a procedure that done under general anesthesia, this procedure can changes the brain chemistry by giving the patient a small electric current that will pass through the brain intentionally making a small fast seizure. That’s why there are some side effects is memory loss, some memory problem improve after the treatment ends.
If a cell containing 8 chromosomes divides by mitosis, how many chromosomes will be in each daughter cell
If a cell containing eight (8) chromosomes divides by mitosis, the number of chromosomes that would be in each daughter cell is: eight (8).
Cell division refers to a process through which a living cell changes from a generalized cell type into a specialized cell type for performing specific functions or tasks in the body of a living organism.
Basically, the two (2) types of cell division include the following:
Meiosis.Mitosis.Mitosis can be defined as a cell division or duplication through which a single parent cell produces two (2) genetically identical daughter cells.
During mitotic division, the two (2) genetically identical daughter cells produced by a single parent cell have the same number of chromosomes as their parent cell; this process is referred to as duplication division.
In conclusion, if a cell containing eight (8) chromosomes divides by mitosis, the number of chromosomes that would be in each daughter cell is eight (8).
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A person with posttraumatic stress disorder who has symptoms of derealization is
The correct answer to the question is (d) experiencing reduced responsiveness. Symptoms of derealization in PTSD are indicative of a dissociative response, which is associated with a sense of the external world being unreal and a detachment from reality.
When a person with post-traumatic stress disorder (PTSD) is experiencing symptoms of derealization, they are typically undergoing a phenomenon where the external world feels strange or unreal. This sense of derealization is one of the many potential responses to trauma, as described by the American Psychiatric Association. It is not directly indicative of increased arousal, reexperiencing of the trauma, or avoidance, but rather can be associated with a reduced responsiveness to the external environment, which aligns with a feeling of disconnection or detachment from the world.
PTSD is characterized by four main types of symptoms: re-experiencing, avoidance, hyperarousal and hypervigilance, and negative alterations in mood or cognition. Derealization is a form of dissociation, often arising in response to a traumatic experience. It represents a psychological coping mechanism that is sometimes employed by individuals to manage the overwhelming stress and anxiety associated with PTSD. This detachment from reality serves as a protective barrier against the pain of fully engaging with traumatic memories or the external cues that evoke them.
The correct answer to the question about a person with PTSD who has symptoms of derealization is (d) experiencing reduced responsiveness. This reduction in responsiveness is closely related to the dissociation category within the cluster of PTSD symptoms. It reflects a complex mental state that goes beyond mere avoidance or direct reexperiencing of trauma.
scientists classify organisms in groups based on:
|.evolutionary phylogeny.
II. DNA analysis.
III. embryology.
IV. morphology.
Answer:
All of them, I just did study island
Explanation:
Which of the following is a product of anaerobic respiration in muscle tissues?
Anaerobic respiration in muscles produces lactic acid as a byproduct, which is notably less efficient at generating ATP compared to aerobic respiration and can lead to muscle fatigue.
Explanation:The product of anaerobic respiration in muscle tissues is lactic acid. During strenuous exercise, when oxygen supply to muscle tissues is insufficient, pyruvic acid derived from glycolysis is converted into lactic acid. This process allows the continued production of ATP through glycolysis by recycling the enzyme NAD+ from NADH. Although this method allows for short bursts of high-intensity exercise, the accumulation of lactic acid may contribute to muscle fatigue. Anaerobic respiration, in contrast with aerobic respiration that occurs in mitochondria and produces approximately 36 ATP molecules per glucose molecule, yields only about two ATPs per glucose molecule due to its less efficient usage of glucose.
A hernia in the umbilical area occurs when a structure protrudes through the abdominal wall. this is an example of a/an:
An umbilical hernia is a type of abdominal hernia where a part of the body, such as the intestine or fatty tissue, pushes through a weak spot in the abdominal wall, causing a bulge in the umbilical area. It can be caused by birth defects, straining due to heavy lifting, obesity, multiple pregnancies, or fluid in the abdominal cavity. Treatment often involves surgical repair and strengthening of the abdominal wall.
Explanation:An umbilical hernia, which the question is about, is a type of abdominal hernia. This medical condition is caused when a part of the body, often part of the intestine or fatty tissue, pushes through a weak spot in the abdominal wall. The protrusion may cause a noticeable bulge in the umbilical (navel) area, especially when the person coughs, lifts heavy objects, or strains. The cause of the umbilical hernia can be different ranging from birth defects, to straining due to heavy lifting, obesity, multiple pregnancies, or fluid in the abdominal cavity. This is a health issue that requires medical attention and treatment, often through surgical repair and strengthening of the abdominal wall.
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Primary consumers _____. are the first to receive energy from a plant receive energy directly from the sun make their own food using photosynthesis break down dead matter into chemical nutrients
Answer:
Primary consumers are the first to receive energy from a plant. Because primary consumers eat plants.
Hope this helped!
Explanation:
Which of the following would describe Lamarck’s ideas about evolution?
Horses and zebras are similar. They have a common ancestor.
A mouse loses its tail in a fight. Its offspring will not have tails.
Wolves eat most of the rabbits in a field. A few smart rabbits find hiding places. They survive and reproduce.( which is correct? )
Answer;
A mouse loses its tail in a fight. Its offspring will not have tails.
Explanation;
Lamarck believed that traits developed during an individuals lifetime would be passed on to the individuals offspring. This is on contrast to Darwin's theory of Natural Selection: Individuals with a competitive edge within a population are more likely to survive and reproduce, thereby passing their genes explaining that particular phenotype to the next generation.
Answer is A mouse loses its tail in a fight. Its offspring will not have tails.
Lamarck’s advocates ‘use and disuse’ principle and inheritance of acquired characters. Use and disuse principle says that Individuals strengthen or build up the characteristics which are used more often, and the characteristics that are useless or seldom used are degenerated or lost and the traits that are acquired by an individual during its lifetime are inherited by its progeny.
Genes that come together with different alleles are called _____.
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The gravitational strength on Earth is greater than the gravitational strength on Mars. Which statement is correct?
The weight of an object will be greater on Earth than Mars.
The weight of an object will be greater on Mars than Earth.
The mass of an object will be greater on Earth than Mars.
The mass of an object will be greater on Mars than Earth.
Answer:
A:The weight of an object will be greater on Earth then on Mars.
Explanation:
What three key features allow prokaryotic populations to consist of trillions of individuals?
Describe the flow of glomerular filtrate from its formation in bowman's capsule till it exits the body as urine
The different types of cells in a body contain identical sets of DNA molecules. However, the structures and functions of the cell types vary widely.
Explain how the differences among various types of body cells arise from gene expression.
Gene expression determines the differences between different types of body cells.
What is gene expression?The process by which the information encoded in a gene is converted into a function is known as gene expression.
The differences between different types of body cells are determined by gene expression.
Gene expression refers to the process by which the information encoded in a gene is used to direct the synthesis of a functional gene product, such as a protein.
The differences between different types of body cells stem from differences in gene expression regulation.
The same set of genes exists in all cell types in the body, but the specific genes that are turned on or off, the extent of their expression, and the processing of their RNA and protein products are what give rise to the unique structures and functions of each cell type.
Thus, this way, the differences among various types of body cells arise from gene expression.
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What glands in the axilla become active at puberty?
The tip of the heart that lies on the diaphragm and points to the left of the body is the