Answer:
B One allele from each parent
Explanation:
You have dominant genes (brown eyes) and recessive genes (green eyes)
In order for a child to be born with brown eyes only one parent needs to have brown eyes. Having green eyes is recessive so either both parents need to have green eyes or neither of them needs to have them. But if one parent has green eyes and the other has brown eyes, then the brown eyed gene will almost always dominate the green eyed one.
I hope this helps! :)
Final answer:
The determination of eye color such as brown or green eyes is due to the interaction of several genes. Brown-eyed parents can have a green-eyed child if both are heterozygous, carrying the green trait.
Explanation:
The factor that determines if someone has brown eyes or green eyes is D. several genes acting together. Human eye color is influenced by several genes, each with multiple alleles. In the case of a couple with brown eyes producing a green-eyed child, it is genetically possible because B. Both parents are heterozygous, having the green trait on the green-blue eye gene. They could carry one allele for brown eyes and one allele for green eyes, and the green-eyed child inherited the green allele from both parents. This scenario is an example of how multiple genes and the interaction between dominant and recessive alleles can lead to the phenotypic expression of eye color.
For example, if both parents have brown eyes and produce a green-eyed child, it's possible because both parents carry the genetic makeup that includes the green trait alongside the dominant brown traits.
A mammalian skull is found in a forest. The skull has incisors, small canines, and many large premolars and molars with prominent surface ridges. Based on this information, what conclusions can be drawn about the feeding behavior of this organism?
Answer:
The animal was most likely an omnivore.
Explanation:
From the dentition, the animal is most likely an omnivore. Carnivores have large and sharp canines for tearing of flesh while most herbivores lack canines altogether.
Answer:
The feeding behavior of this organism is omnivorous.
Explanation:
Omnivorous are those organisms which feed on both plants and animals for the uptake of energy. There are various types of teeth are present in the jaw of omnivorous organisms such as incisors, canines, premolars and molars. Every teeth have a specific function i . e. incisors helps in cutting of food, the canines helps in tearing and the molars and premolars is responsible for crushing the food materials.
What is the process of water vapour moving out of the leaves?
The process of water vapor moving out of the leaves is known as transpiration. Transpiration is a vital physiological process in plants, whereby water is absorbed by the roots from the soil and transported upwards through the plant's vascular system (xylem) to the leaves. Once in the leaves, water molecules evaporate from the surfaces of specialized cells called stomata into the surrounding air as water vapor.
Transpiration serves several essential functions in plants. Firstly, it facilitates the uptake of water and minerals from the soil, providing necessary nutrients for growth and metabolism. Additionally, transpiration helps to cool the plant by dissipating heat through the process of evaporation. This cooling effect is particularly crucial for plants growing in hot environments, as it helps prevent overheating and maintains optimal physiological conditions.
Stomata, small pores located primarily on the undersides of leaves, control the rate of transpiration. These pores are surrounded by specialized guard cells that can open and close to regulate the movement of gases, including water vapor, into and out of the leaf. When stomata are open, water vapor diffuses out of the leaf into the surrounding air, driven by differences in water vapor pressure between the leaf interior and the external environment.
Factors such as light intensity, temperature, humidity, and wind speed influence the rate of transpiration. Higher light intensity and temperatures generally increase transpiration rates, as they enhance the evaporation of water from the leaf surfaces. Conversely, high humidity levels reduce transpiration rates, as the concentration gradient for water vapor between the leaf and the air is diminished.
Overall, transpiration plays a crucial role in plant water balance, nutrient uptake, and temperature regulation, making it a fundamental process in the physiology and ecology of plants.
Question 25
4 pts
Artificially transported sand is associated with which type of stabilization?
A. groin
B. seawall
C. beach nourishment
D. relocation
Answer:
C. Beach nourishment
Explanation:
Beach nourishment the process by which sand lost through erosion or longshore drift is replace by other sources.
Its also known as beach renourishment or replenishment.
The atrial cells and ventricular cells are connected to each other using gap junction so that the wave of depolarization can directly spread from the atrium to the ventricle without the AV node.a.true b.false.
Answer:
The given statement is true.
Explanation:
The atrial cells and ventricular cells are connected to each other using gap junction so that the wave of depolarization can directly spread from the atrium to the ventricle. This is true.But, not without using the AV nodes. Through myocytes, the depolarizing waves pass much slower than the atrioventricular cells. AV nodal cells conduct them much faster than the atrial and ventricular cells. This system works as a standby. If there is some problem with the AV node, the atrial and ventricular cells will be able to spread the depolarizing waves with the help of gap junctions and without bothering the AV node._______ is an organism’s genetic makeup, while ________ is an organism’s physical appearance.
Where does blood go after it leaves the right side of the heart
Answer: Blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs.
Explanation:
What is a defining characteristic that all protocells had in common?
Answer:
a surrounding membrane or membrane-like structure
Explanation:
A protocell (or protobiont) is a self-organized, endogenously arranged, spherical array of lipids suggested as a step-stone in the direction of life's origin.
Protocells are thought to have enabled the reproduction of RNA and hence the exchange of genetic information at a time prior to the advent of DNA and proteins (the world RNA hypothesis).
A common characteristic common in all the protocells is the surrounding membrane through which the exchange of genetic information or proteins takes place.
Protocells, the precursors to modern cells, primarily share two key characteristics: maintaining an internal chemical environment and carrying out fundamental metabolism. This was enabled by their lipid bilayer makeup.
Explanation:A defining characteristic that all protocells shared is their capacity to maintain a separate internal chemical environment and to carry out primitive forms of metabolism. This was made possible because protocells were likely composed of a lipid bilayer, which allowed them to maintain a separate internal environment from the surrounding medium. Furthermore, they are also believed to have the ability to carry out basic metabolic processes.
Learn more about Protocells here:https://brainly.com/question/35375314
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You and your partner Amy arrive on scene to find a woman with hives over much of her body. She is wheezing and complaining of difficulty breathing. Her husband says she was stung by a hornet and has no prior history of allergies. What would be the best course of action?
Answer:
Explanation:
Based on the scenario being described within the question it can be said that the best course of action would be to place a high flow of O2 and rapid transportation if the patient appears to be going into anaphylaxis. Mainly because this is a severe life threatening allergic reaction, that occurs at a moments notice and closes the individuals airway causing breathing to become very difficult.
A close friend has joined a clinical trial. When you ask her about the types of treatment she might be given, she tells you that neither she nor the doctor running the trial will know until the process has been completed. What type of trial has she joined?
A. double-blind
B. peer reviewed
C. unsafe
D. theoretical
E. epidemiological
Answer:
A. double-blind
Explanation:
Based on the scenario being described within the question it can be said that the type of trial that she has joined is known as a double-blind study. This is a type of study in which individuals are chosen randomly for each clinical intervention and the results are not given to the researchers until after the trial. This also includes any and all information that may influence the researchers behavior or thoughts on the study.
Answer:
A. double-blind
Explanation:
In Medicine, Double-blind study is a type of trial in which neither the patient nor the doctor running the trial will know until the process has been completed.
It is usually aimed at preventing bias in a scientific research or experiment to the placebo effect.
What term means change over time?
Answer:
Evolution
Explanation:
evolution is what happens over a long periods of time
Scientists believe the Archaebacteria to be survivors of an ancient group of organisms that bridge the evolutionary gap between prokaryotes and
Answer:
Explanation: Scientists believe that Archaebacteria are the survivors of an ancient group of organisms that bridge the evolutionary gap between prokaryotes and eukaryotes. Eukaryotes are the true evolved cells and they differ from prokaryotes
Explanation:
Carbon cycles between the biotic and abiotic worlds mainly through
Answer:
your heart
Explanation:
The presence of a mutualist spider in a certain area improves the survival of an herbaceous shrub by reducing the impact of herbivorous insects. These spiders are preyed on by lizards, and lizards are eaten by birds. An increase in the density of lizards would most likely have a _______ direct effect on spiders and a _______ effect on the plant.
Answer:
An increase in the density of lizards would most likely have a negative direct effect on spiders and a negative indirect effect on the plant.
Explanation:
Many animals modify their environments, apparently to reduce predation risk .Scincid lizards are included or excluded from 21 replicated plots, and spiders therein are classified as exposed or sheltered, depending on whether they are uncovered in their web or hidden in cocoons, leaves/debris, or burrows. Exposed spiders are greatly affected by the presence of predatory scincid lizards, whereas sheltered spiders are not. More specifically, lizards, which forage close to the ground, reduce the abundance of exposed spiders by two-thirds but have no effect on the abundance of sheltered spiders. Sheltered spiders are able to avoid predation and share space with lizards, suggesting that shelter construction is a mechanism for reducing predation risk and has important population consequences.
Enkephalins and endorphins are peptides that act like morphine. True or False
Answer:
True.
Explanation:
Enkephalins and endorphins are endogenous peptides while morphine is an exogenous peptide.
Enkephalins and endorphins are powerful analgesics 18 to 500 times more than morphine. Hence, morphine is less analgesic than enkephalins and endorphins.
Enkephalins and endorphins act on the mu, kappa , delta receptors and morphine also acts on the same receptors. All of them has same effects on the body.
Hence, Enkephalins and endorphins are peptides that act like morphine.
Answer:
True
Explanation:
Endorphins are hormones of the body that are internally derived. They are opioid neuropeptides produces in humans and some other animals and are able to bind to opiate receptors. These endogenous peptides are similar to opiod drugs e.g morphines, they help to relieve pain and stress. It can also be referred to as the happy hormone.
Also, enkephalins are endogenous hormones produced in the body. They are opioid pentapeptides and are similar to morphines as they are able to bind opiate receptors. They also help in relieving stress.
One more question!
Glucose is an example of a ______ sugar.
simple
complex
starchy
Glucose is a simple sugar or monosaccharide.
Consider a hypothetical locus with two segregating alleles (A and B). Population size is small, mutation is absent, and neither of the two alleles has a selective advantage. After a long period of time (many generations), what will occur?a) The population will eventually become monomorphic for one of the two alleles.b) Allele frequencies will cycle over time.c) Balancing selection will maintain both alleles.d) Allele frequencies will change over time, but both alleles will remain.e) Allele frequencies will remain constant.
Answer:
The preferable option will be - A.
A. The population will eventually become monomorphic for one of the two alleles.
Explanation:
The population will eventually become monomorphic for one of the two alleles because -
Here mutation is absent. No other allele is allowed to get involved here. The population size is small. As allele A and B are fixed for that population after many generations the population will become monomorphic for that two alleles.A sample of DNA from an unknown organism is analyzed and found to contain histone proteins, more than 2 billion base pairs, and large segments of noncoding DNA. From this information, one can conclude that the organism is:
Answer:
The correct answer is an eukaryote.
Explanation:
The DNA present in eukaryotes comprises chromosomes bundles, these bundles contain molecules of linear DNA, which is wrapped around the protein, that is, alkaline known as histones. These histones help the DNA to turn into a more composite composition.
The DNA present in a eukaryote may comprise more than two billion base pairs, and because of the linear characteristic, the DNA within a eukaryote comprises sequences of non-coding DNA known as telomeres found on each terminal of the chromosomes.
LISA
Biography
Editorial
All of this is nothing, however, against Enrique's
longing for his mother, who left him behind
eleven years ago. Although his efforts to survive
often force her out of his mind, at times he thinks
of her with a loneliness that is overwhelming. He
remembers when she would call Honduras from
the United States, the concern.
-Enrique's Journey,
Sonia Nazario
Use the drop-down menus to choose whether each
statement describes the biography, the editorial, or
both
The passage presents the idea that lives are in
danger
The text uses third-person point of view to express
feelings
The text presents an opinion about the topic of
immigration
Answer:
The passage presents the idea that lives are in danger.
✔ both
The text uses third-person point of view to express feelings.
✔ the biography
The text presents an opinion about the topic of immigration.
✔ the editorial
Explanation:
The first statement describes both an editorial and a biography. The second statement describes the biography. The third statement describes the editorial.
A biography is simply an account of a person’s life. It can be about a living person, a person who lived hundreds of years ago, a person who is world-renowned, a forgotten hero, or a group of people.
An editorial, a leading article, or a leader is an article that is written by the editor-in-chief of a newspaper (or magazine). The article is usually not signed. Editorials are often referred to as “opinions”.
To learn more about the editorial, refer to the link:
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What are the most common symptoms of
musculoskeletal diseases and disorders?
Answer:
Common symptoms of musculoskeletal disorders include pain, weakness, stiffness, joint noises, and decreased range of motion. Inflammation may cause pain, swelling, warmth, tenderness, impaired function, and sometimes redness of the overlying skin.
Includes Diseases: Rheumatoid arthritis
Explanation:
Answer:
Common symptoms of musculoskeletal disorder includes pain, stiffness, weakness, swelling, and motion range decreases.
Explanation:
Musculoskeletal disorder is combination of Muscles and skeleton.
It is a disorder that affect the body movement.
For e.g. tendon strain (disease) is an example.
Which characteristic is found in liquids and gases?
particles stay in a fixed position
takes the shape of the container
has a fixed volume
no particle movement
Answer:
Takes the shape of the container
In Shorthorn cattle, both red coat color and white coat color are true breeding. Crosses of red cattle x white cattle produce offspring that are uniformly reddish brown but thickly sprinkled with white hairs. This type of coat color is called roan. Crosses of roan x roan produce 1/4 red : 2/4 roan: 1/4 white. What kind of genetic inheritance can explain these results
Final answer:
The results can be explained by incomplete dominance, where neither allele is dominant and the heterozygous individual displays an intermediate phenotype.
Explanation:
The kind of genetic inheritance that can explain the results of crosses between roan cattle is incomplete dominance. In incomplete dominance, neither allele is dominant over the other, and the heterozygous individual displays an intermediate phenotype. When red cattle (RR) are crossed with white cattle (WW), the offspring have a genotype of RW, resulting in the roan phenotype, which is a mix of red and white hairs.
This type of inheritance is similar to what is observed in snapdragons, where a cross between a homozygous parent with white flowers (CWCW) and a homozygous parent with red flowers (CRCR) produces offspring with pink flowers (CRCW). In both cases, the heterozygous genotype produces an intermediate phenotype.
A cross section of a seed is shown.
Which is represented by the letter X?
embryo
seed coat
stored food
leat
S
IL
Answer:
The correct answer is embryo
Explanation:
BRAINLY please help
Which of these cell types is NOT an immune cell?
A.
leukocyte
B.
phagocyte
C.
lymphocyte
D.
erythrocyte
Answer:
D
Explanation:
A is incorrect because leukocyte is a colorless cell that circulates in the blood and body fluids and is involved in counteracting foreign substances and disease; a white (blood) cell.
B is incorrect because phagocytes are a type of cell within the body capable of engulfing and absorbing bacteria and other small cells and particles.
C is incorrect because lymphocyte are a form of small leukocyte (white blood cell) with a single round nucleus, occurring especially in the lymphatic system.
D is correct because erythrocyte are a red blood cell that (in humans) is typically a biconcave disc without a nucleus. Erythrocytes contain the pigment hemoglobin, which imparts the red color to blood, and transport oxygen and carbon dioxide to and from the tissues.
A man with the autosomal recessive disorder phenylketonuria (PKU) and a woman without PKu heve a son named Peter, who does not have PKU. Peter is curious about whether hs mother is a carrier for PKiu Which fact would allow him to know Peter's matemal grandmother does not have PkU.
1. Peter's maternal grandfather does not have PkU
2. Peters maternal grandfather has PKu
3. Peter submits his own blood semple to a local genotyping lab, which establishes that he is a carrier for Pku
4. Peter's own daughter has PKU
Answer:
2. Peter's maternal grandfather has PKU.Explanation:
Such type of the genetic disorder in which two copies of a gene must be mutated at a time is called autosomal recessive disorder such as sickle cell anemia, phenylketonuria, and some other diseases. When a sing copy of a gene is mutated in a person then this disorder is not appeared and the person is called a carrier. So when a child is born by two carrier parents then there is a chance that a child will be affected if both the parents donate mutated genes. In the case of Peter, since peter does not show this defect this means his maternal grandfather was affected by this disorder.On-center cells: A. are excited by light that falls in the periphery of their receptive field. B. are excited by light that falls in the center of their receptive field. C. are inhibited by light that falls in the center of their receptive field. D. are excited by light that falls across their entire receptive field.
Answer: B) are excited by light that falls in the center of their receptive field.
Explanation:
There are two types of bipolar cells present in the retina which are differentiated on the way the centres of their receptive fields respond to light. The names of bipolar cells are ON-centre and OFF-centre.
If a light fall at the centre of the receptive field of a bipolar cell, it will experience an exciting effect on that cell, resulting in it being depolarized, it is an ON-center cell.
Hence, the correct option is B.
Final answer:
On-center cells are excited by light that falls in the center of their receptive field. These cells are part of the retina's ganglion cells, which are connected to the photoreceptors through the bipolar cells and contribute to visual contrast and sharpness.
Explanation:
A student asked whether on-center cells are excited by light that falls in the periphery of their receptive field, in the center of their receptive field, or across their entire receptive field, or if they are inhibited by light that falls in the center of their receptive field. The answer to this question is: B. are excited by light that falls in the center of their receptive field.
In the visual system, particularly the retina, there are photoreceptors like rods and cones that respond to light. These photoreceptors connect to bipolar cells, which in turn connect to ganglion cells. These ganglion cells have receptive fields with distinctive on-center and off-center characteristics. On-center cells become excited when light stimulus is applied to the center of their receptive field and become inhibited when the light stimulus is applied to the periphery of the receptive field. This process is part of a complex neural circuitry including photoreceptors, horizontal cells, bipolar cells, and amacrine cells, which helps to enhance the visual contrast and sharpness of the image.
the importance of biodiversity in chimps
How does the loss of bicarbonate due to diarrhea increase the protons in the blood?
Answer:
Increase of protons (H+) in the blood causes acidosis. These effects decrease hemoglobin’s affinity for oxygen and weakens its capacity to bind and increasing the haemoglobin dissociation.
Loss of bicarbonate stores by diarrhoea or tubular renal waste results in a state of metabolic acidosis leads increased concentration of plasma chloride and decreased concentration of plasma bicarbonate. Decrease in plasma bicarbonate leads to increase in H+ ions causing acidosis.
A female zebra finch reared by a father with a red feather taped to his head will select a mate with a similar ornament over an unornamented male. What are plausible ultimate explanations for this behavior (i.e., why it occurs in the context of natural selection)?1.Zebra finches are able to perceive ornamentation on other birds.2.A female zebra finch learns to recognize suitable mates by observing her father.3.A female zebra finch that chooses a mate that resembles her father is more likely to reproduce successfully.
Answer: 3.
Explanation:
The concept is based on sexual imprinting which results from selection for recognition of conspecifics.
Sexual imprinting is the mechanism by which a young animal discovers the properties of a desired mate. Male zebra finches, for example, tend to favor mates with the presence of the female bird rearing them, rather than that of the birth parent when they're special.
A female zebra finch select a male that resembels her father with a red feather taped to his head for reprodcution because there are sufficient opportunity of sexual imprinting.
Hence, the correct option is 3.
When a substance moves across the plasma membrane along a concentration gradient at a rate faster than would be expected by simple diffusion alone but without the expenditure of metabolic energy, the process is best described as:
A. Facilitated diffusion
B. active transport
C. pinocytosis
D. the work of an ion pump
E. Osmosis
Answer:
A. Facilitated diffusionExplanation:
The plasma membrane is an important membrane that is present in the cell and plays an important role in the exchange of the materials across the cell. This membrane is made up of phospholipid bilayers and some other components. Movement of the substances across the membrane takes place by two methods such as an active process in which the energy required and the other is the passive process in which energy is not required.Diffusion, osmosis, and facilitated diffusion are an example of passive diffusion. Facilitated diffusion is such type of passive movement in which the membrane proteins helps in the transport of the substances across the membrane and thus the is faster than other passive processes. In this process no energy is required and movements take place along the concentration gradient.
Molecules are moved over the membrane using one of two methods: an active process that requires energy, or a passive mechanism that does not.
The process is best described as a form of passive diffusion (Facilitated diffusion) option A.
Facilitated diffusion is a sort of passive movement in which specific transmembrane integral proteins aid in the transport of molecules across the membrane.This result in a faster process than other passive processes.There is no need for energy in this particular transport process and movements are made along the concentration gradient.
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Which feature on microscope did Anton van Leeuwenhoek add that enabled him to magnify organisms about 250 times?
•drop of water
•light from oil lamp
•tubes that extend
•polished lenses
Answer: Polished lenses
Explanation:
I did the quiz
Answer:
polished lenses
I got it right :D