Chromosome iv in drosophila is a very small chromosome and carries a tiny amount of genetic material. fruit flies that are trisomic for chromosome iv have no apparent phenotypic abnormalities, and they retain their fertility. among the genes on chromosome iv is one for which a recessive allele ey produces the "eyeless" phenotype. a male that is trisomic for chromosome iv and has the genotype + + ey is crossed to a diploid eyeless female with the genotype eyey.
Which of the following best describes the process of diffusion?
A. Diffusion is the movement of molecules from an area of higher concentration to one of lower concentration by random molecular motion.
B. Diffusion is the movement of molecules from an area of lower concentration to one of higher concentration by random molecular motion.
C. Diffusion is the movement of molecules from an area of lower concentration to one of higher concentration caused by an input of energy to the system.
D. Diffusion is the movement of molecules from an area of higher concentration to one of lower concentration caused by an input of energy to the system.
Diffusion is best described as the process where molecules move from an area of higher concentration to one of lower concentration by random molecular motion, until there's uniform distribution. It does not need an energy input.
Explanation:The best choice that describes the process of diffusion is option A. Diffusion is the movement of molecules from an area of higher concentration to one of lower concentration, driven by random molecular motion. This tends to happen until the concentration of molecules is uniform throughout. It is a naturally occurring process and does not need an input of energy from the system. For example, if you were to open a bottle of perfume in a room, it would eventually spread out, or diffuse, until the smell is evenly distributed in the room.
Learn more about Diffusion here:https://brainly.com/question/29787215
#SPJ3
what is a characteristic of scavengers that make them different from carnivores PLEASE HELP.
Physical anthropologists are only concerned with the past evolutionary development of the human animal and the biological variations with the species that occurred in the past.
a. True
b. False
Which bases are found in a strand of DNA?
Answer:
The bases found in a DNA strand are adenine (A), thymine (T), guanine (G) and cytosine (C).
Explanation:
Nitrogen bases are compounds that are part of the composition of DNA and RNA, which are the nucleic acids found in living organ cells.
They are five and can be classified into two types:
Purine or purine bases - adenine and guanine Pyrimidine or pyrimidine bases - cytosine, thymine and uracil.DNA is composed of the following bases:
Adenina (A) e guanina (G), que são bases púricas. Citosina (C) e timina (T), que são bases pirimídicas.Alvira is being treated for borderline personality disorder in an inpatient treatment center. what will the second stage of treatment generally involve
Borderline personality disorder refers to a kind of mental illness, which is signified by an ongoing pattern of differing moods, behavior, and self-image. In the second stage of borderline personality disorder, the patients are been permitted to demonstrate their physical emotions that the patient is avoiding for some time.
The objective of this stage is that the patient fully expresses his or her emotions. The correct answer is option C that is, discussing the loss of her parents at the age of five and how this is associated with Alvira's current emotional issues.
Name one reason scientists believe that all life evolved from a single common ancestor.
If a person requires greater return when risk increases, thatb person is said to be
Biology in eukaryotic cells, translation occurs in the _______ and transcription occurs _______.
ions are necessary to activate the binding sites on the actin filaments.
Answer:
Complete the following statements.
Calcium ions are necessary to activate the binding sites on the actin filaments.
The molecule ATP is required each time the myosin head detaches from one site and reattaches to another.
Explanation:
just got it from edge
An isotope has the same ________, but a different ________
Answers
A) atomic number, mass number
B) Mass number, atomic number
C) number of neutrons, number of protons
D) number of protons, number of electrons
Answer:
Atomic number, mass number.
Explanation:
The three sub atomic particles of the atoms are electron, proton and neutron. The atomic number of the element is equal to the number of protons of the element.
Isotopes may be defined as the elements that have the same atomic but different mass number. The simplest example of isotopes are protium, deuterium and tritium. They have the same atomic number 1. These are the isotopes of hydrogen.
Thus, the correct answer is option (A).
Compare and contrast Broca’s area and Wernicke’s area. Describe how each was discovered.
Answer:
Broca’s area is the area of the brain that controls speech production. It was discovered by Paul Broca after he discovered a lesion in the left frontal lobe of a patient who could not speak. Wernicke’s area is the area of the brain that controls speech comprehension. Like Broca’s area, it also plays a role in speech production. Wernicke’s area was discovered by Carl Wernicke, who found that damage to the left temporal lobe resulted in speech deficits.
bacteria can reproduce quickly by means of binary fission. because of this, after binary fission..
Out of the following given choices;
A)the offspring will have traits of both parents.
B)there is genetic variation among the offspring.
C)all the offspring will be genetically identical.
D)none of the offspring will be genetically like the parents.
The answer is C. This is because, in binary fusion, they are no formation of gametes. Therefore genetic variability that comes with sexual reproduction not found in asexual reproduction. Mostly, the offspring buds off from the parent or grows from a split part of the parent. Therefore the offspring is genetically identical to the parent
"the pathway followed by glucose 6 phosphate when the cell needs to divide is called"
Genetic material that directs the cell is called (2 points) RNA the nucleus cytoplasm DNA
. Many cities have “combined” sewers. In good weather, these systems funnel sewage to treatment plants. During rainstorms street runoff is combined with sewage. Combined sewers in cities can be problematic because _____. the sewers cannot handle the volume of waste from street runoff and sewage sewers are often blocked by trash that people have thrown into them street runoff cannot flow into the sewers and be safely taken to treatment plants street runoff often causes the sewers to deteriorate
The given blank can be filled with the sewers cannot handle the volume of waste from street runoff and sewage.
The combined sewage system is very popular in many big cities. The sewage system handles all the sewage combining from the houses. During the rainy season, the water flows in the sewer, causing the overflow of the sewers and spread of water in the nearby regions.
How would you classify l.l.bean in terms of competitive position why?
The L.L. Bean can be classified as catalogue retailer, for it has an extensive product selection and design indicating the preferences of their customers. It provides customer satisfaction by delivering high quality products, fair pricing, convenience and service in no time.
Moreover, they deliver product from their warehouse to the customer with minimum mistake and fair price to remain in competition for they want to create competitive advantage over the competitor by branding own products and persuasive advertising and give maximum benefits to its customer.
_____ is a common condition that occurs in healthy pregnant women.
a. pre-eclampsia
b. gestational hypertension
c. gestational diabetes
d. physiological anemia
The right option is b.Gestational hypertension
Gestational hypertension is a common condition that occurs in healthy pregnant women. Gestational hypertension is characterized by high blood pressure during pregnancy. This form of hypertension develops after 20 weeks of gestation. Symptoms of gestational hypertension include increased blood pressure, sudden weight gain, headaches, nausea and vomiting.
If the government places a binding price ceiling on cancer-treating drugs, then:
a. fewer people will die from cancer.
b. more people will die from cancer.
c. there will be no change in the number of people who die from cancer.
d. the supply of cancer-treating curves will increase.
How does altering the environmental conditions affect the growth of radish seedlings?
Altering the environmental conditions will affect the growth of radish seedlings. When radish seeds are developed in environments with different light obtainability, seeds that have less light available will exhibit etiolation. Etiolation is regarded as having long pale yellow color stems and small leaves. On the other hand, seeds that have sufficient light available will be sturdier, green and tinier.
describe how waves superpose on each other using specific examples from two types of waves
During superposition of a wave such as that of the oceans, when the crest and the trough meet, then they cancel out into the period. If two crests meet up, they add up to a crest that’s equivalent to the summation of their amplitudes. This is also true when two troughs meet up.
In which infertility treatment are eggs fertilized in a clinic and then transferred to the woman's uterus?
Down's syndrome is caused by trisomy of chromosome 21, where individuals inherit an extra copy of the chromosome instead of the normal two. there is a wide range in the severity of the disease experienced by each individual, but experience lifelong intellectual disabilities and a number of associated health problems. one of the most common problems experienced by those with down's syndrome, is the early onset of alzheimer's disease (usually emerging between the ages of 30-45), with up to 75% developing dementia in their lifetime (ness et al., 2012). one of the reasons behind this is the fact that the gene encoding for amyloid precursor protein (app) is present on chromosome 21. due to this, individuals with down's syndrome produce more app.
a. what is app and why would this genetic change make alzheimer's disease much more likely to develop?
Amyloid precursor protein (APP) is an integral membrane protein expressed in many tissues and concentrated in the synapses of neurons with unknown function. APP is the precursor molecule whose proteolysis generates beta-amyloid (Aβ), a whose amyloid fibrillar form is the primary component of amyloid plaques. Amyloid plaques are found in the brains of Alzheimer's disease patients. APP gene is triplicated in patients with Down’s syndrome. As a result, an amyloid deposition which is associated with Alzheimer's disease is present in all Down syndrome patients older than 30.
Why do you think there are fewer heart transplants performed each year than kidney transplants?
This is because, people, generally, have two kidneys and are also able to function properly with one functional kidney. Therefore it is easier to perform kidney surgery without putting the patient’s life at risk as compared to heart surgery. Everyone has one heart, a critical organ whose surgery has to be well planned and done only if the risk of not doing the surgery outweighs that of doing the surgery.
Thermohaline circulation is movement of seawater due to differences in what two properties?
1)
density and temperature
2)
salinity and temperature
3)
temperature and depth
4)
salinity and density
Answer is 2. Salinity and temperature.
The movement of water in the ocean is called thermohaline circulation. This circulation is depends on temperature and salinity. These two factors together affect the density of seawater. More dense seawater sinks below less dense seawater and thus the oceans circulate partially based upon their temperature and salinity. Heat from the Sun affects temperature of seawater. Surface seawater gets more heat near the equator than near the poles, and similarly more in the summer than in the winter. Salinity of seawater is affected by evaporation, precipitation, ice formation, and ice melting. Evaporation increases the salinity of seawater because when seawater evaporates, the salts are left behind, thus increasing their concentration. Precipitation and river input decrease salinity because the input of freshwater dilutes the salts in seawater, thus decreasing their concentration.
What best explains why the moon's surface gravity is only one-sixth of Earth's surface gravity?
Answer: The answer is D
Explanation: The moon is smaller than the earth therefore the gravity is less
Your blood pressure is 135/85, what does this mean in terms of the amount of pressure in the systemic arteries and in terms of what the heart must generate to eject
High blood pressure
The diversity found among dna molecules is due to the sequence of _______.
Final answer:
The diversity among DNA molecules comes from the sequence of nucleotides, which can create a vast number of combinations despite having only four types. Mutations contribute to this diversity by altering DNA sequences, leading to variations among individuals.
Explanation:
The diversity found among DNA molecules is due to the sequence of nucleotides. Even though DNA consists of only four different bases — adenine (A), cytosine (C), guanine (G), and thymine (T) — the arrangement of these nucleotides can vary infinitely. Each organism has a unique DNA sequence, which serves as a genetic blueprint vital for its development, functioning, and reproduction. This genetic diversity is the foundation of the wide variety of life on Earth.
Mutations are changes in the nucleotide sequence that can occur spontaneously or due to external factors like radiation or chemicals. These mutations can lead to variations among individuals within the same species, contributing to the biological diversity we observe. Such variations include single nucleotide polymorphisms (SNPs), which are differences in single nucleotides between individuals, further highlighting the role of nucleotide sequences in genetic diversity.
Reflect on all the illnesses anna garcia has experienced.did any of her illnesses studied this year result in a breakdown of her body's ability to protect itself?
Anna Garcia had experience various illnesses that weaken her immune system and make her body more susceptible to bacterial infection. Her sickle cell disease results in low amounts of oxygen in the body where the white blood cells cannot function and protect the immune system.
Moreover, her type I diabetes results in fatigue and exhaustion because the body cannot convert glucose to energy. Lastly, she had urinary tract infection for her body does not have strong immune system against the pathogens causing the problem.
A 21-year-old presents with inflammation of the testes and is diagnosed with orchitis. what is the most likely cause of his symptoms?