Sexual reproduction has never been observed in which type of fungus
Birth control pills are a popular form of contraception for women. How do birth control pills prevent pregnancy?
A.by covering the cervix and blocking sperm from entering the uterus
B.by blocking the Fallopian tubes and keeping the eggs from reaching the uterus
C.by introducing female hormones that prevent the ovaries from releasing eggs
How does the age structure affect population growth short answer?
Suppose you observed 455 individual cockroaches in the infested apartment after 5 years of exposure to hydramethylnon + glucose bait. if the population had not evolved, how many individuals of each genotype would you expect? round your answers to the nearest whole number. (for help getting started, see hint 1.)
The bottleneck effect is used to describe an event where a population decreases. One example involves the northern elephant seal. They have a reduced genetic variation due to a population bottleneck humans inflicted on them in the 1890s. Hunting reduced their population size to as few as 20 individuals at the end of the 19th century. Their population has since rebounded to over 30,000, but they have much less genetic variation than a population of southern elephant seals that was not so intensely hunted. Which phrase best explains this change if gene frequency?
Which post disaster phase is generally characterized by optimism due to an infusion of resources?
What does the Nucleus contain? What role do its contents play in the cell?
The nucleus significantly contains the genetic material of living organisms. It is responsible for encoding genetic characteristics within the individual. It is also known as the "controlling center of the cell."
What is Nucleus?The nucleus was first discovered by Robert Brown. It possesses a double-layer covering called a nuclear membrane. It contains pores that allow the transfer of material. It also contains chromosomes that are only visible during the time of cell division.
The nucleus contains nucleolus which is rich in protein and RNA. It is also known as the factory of ribosomes and is helpful in protein synthesis. Nucleus also helps in the transfer of genetic information from one generation to another.
Therefore, the nucleus significantly contains the genetic material of living organisms.
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____ 15. which excretory organ eliminates water and some chemical wastes in perspiration?
Final answer:
The skin is the excretory organ responsible for eliminating water and some chemical wastes through perspiration.
Explanation:
The excretory organ that eliminates water and some chemical wastes in perspiration is the skin. The skin contains sweat glands that produce sweat, which is a way for the body to regulate temperature and remove excess water, salts, and a small amount of urea. This role in excretion makes the skin an important part of the excretory system, which also includes other organs such as the kidneys, liver, lungs, and large intestine. Each of these organs contributes to eliminating different types of waste from the body.
blue jays and robins do not interbreed. assuming that blue jays and robins share the same habitat, describe the possible conditions that keep these bird reproductively isolated. explain your answer.
Why does heating up a protein cause it to lose function?
At a hydrothermal vent, _____.
seawater seeps into the ocean floor through cracks in the crust
seawater seeps out of the ocean floor through cracks in the crust
bacteria and other organisms die due to lack of nutrients
The brain operates on two levels. one of these is the _____ level.
Answer:
The two levels are Awareness and Unconsciousness (consciousness)
Explanation:
A brain is an organ of the central nervous system it functions can be found in all vertebrate and invertebrate animals. located close to the visual senses. Gives signals impulses that act as action potentials that act on distant parts of the body. Unconsciousness is the state when the ability to maintain a sense of the environment and the surroundings is essentially lost involving a complete or near-complete lack of response to stimuli. It may also occur as a result of brain hemorrhage or brain hypoxia, severe fatigue and other cause. Where consciousness i.e the awareness is the quite opposite in which the person operates his present state of mind.Which statement describes a species that is at carrying capacity?
A placebo is a substance that is unlikely to affect the dependent variable true or false ?
Answer:
true
Explanation:
apex
Consider the life cycle of a typical frog. Where within the life cycle does fertilization take place? A) A. B) C. C) D. D) E.
Final answer:
Fertilization in the life cycle of a typical frog occurs externally in moist environments. The life cycle consists of a larval stage where the tadpoles live in water, breathing with gills, and a metamorphosis stage where they develop into air-breathing adults.
Explanation:
In the life cycle of a typical frog, fertilization takes place externally. Frogs lay their eggs in moist environments to prevent the eggs from dehydrating, as they lack a hard shell. The life cycle of frogs includes the larval stage, where tadpoles are filter-feeding herbivores, breathing with gills and having a lateral line system. This is followed by metamorphosis into the adult stage, during which the gills and lateral line system are absorbed, limbs develop, and they transition to a carnivorous diet and air-breathing lifestyle with lungs and an eardrum.
Horses and donkeys can interbreed. The offspring that develops called a mule, is sterile and unable to produce its own offspring. Would these be considered the same or different species?
Chris begins to sweat when he works out. the sweating that occurs
He human gene egfr located on chromosome 7 is a proto-oncogene that codes for a growth factor cell surface receptor. the binding of growth factors to this receptor can lead to cell proliferation. hypothesize what potential impact a mutated egfr allele will have on a cell. give one possible impact and explain your answer
A mutated EGFR gene may cause the up-regulation of the growth factor receptors. This causes an abnormally high levels growth factor response to occur even when growth factors have not bound the receptor causing the epidermal cells to proliferate. This unregulated growth causes cancer such as adenocarcinoma.
The mutated EGFR allele leads to development of cancer.
Further Explanation:
Proto-oncogenes are the genes that induces normal cells to become cancerous if they are mutated which is dominant in nature.
The mutated proto-oncogene becomes oncogene when mutated. Most of the time proto-oncogene encodes proteins which stimulates the cell to divide, inhibit cell differentiation and prevents cell death and these processes is crucial for normal development and maintenance of organs. But oncogenes shows higher cell division, decreased cell differentiation and cell death inhibition which is the characteristics of cancer cell.
EGFR or Epidermal Growth Factor Receptor functions in regulating the epithelial tissue developmental process and homeostasis. In cancer cells EGFR is inappropriately activated in the cancer cell due to point mutations or transcriptional upregulation. EGFR has also been marked as the biomarker of resistance in tumors.
EGFR are involved in canonical EGFR signaling pathway which is ligand and kinase-dependent.
When there is absence of stimulation, the EGFR is normally found to be in auto-inhibited, incompetent state in plasma membrane. Binding of ligand allows the receptor dimerization which further leads to EGFR kinase activation.
EGFR signaling can be disrupted due to EGFR gene amplification or mutations. Mostly the mutations occurs in glioblastoma and lung cancer. These genetic lesion is accompanied by increase in EGFR ligand production.in certain cases genetic changes determines the abnormal trafficking of EGFR that leads to enhanced signaling and tumor development.
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1. Learn more about cell https://brainly.com/question/1579016
2. Learn more about cell cycle https://brainly.com/question/1600165
3. Learn more about meiosis https://brainly.com/question/94813
Answer Details:
Grade: College biology
Subject: Biology
Chapter: Cancer biology
Keywords:
Proto-oncogenes , genes, normal cells, cancerous, dominant, oncogene, proteins, cell, tissues, organs, EGFR, Epidermal Growth Factor Receptor, homeostasis, resistance, ligand, plasma membrane, signaling, tumor.
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Based on early observations, including those in the table below, scientists proposed that the continents were once together but had drifted apart. However, scientists could not identify anything that would make them move. New technology, such as a worldwide network of earthquake detectors, led to new observations. Then scientists proposed that Earth’s surface was divided into tectonic plates that would move as a result of forces linked to earthquakes and the formation of new ocean floor.
How are continental drift and plate tectonics related?
Continental drift was the hypothesis that led to the theory of plate tectonics.
Continental drift was the theory that became the law of plate tectonics.
The theory of continental drift was modified based on the new observations to become the theory of plate tectonics.
The theory of continental drift was proven false, and the law of plate tectonics took its place.
When the complete der ring des nibelungen (the ring of the nibelung) is performed, it lasts about how long?
It is 18 hours long.
Why is getting accurate numbers for the rate of child abuse so difficult?
The reason that it is hard to obtain accurate number is because many child abuse cases are not reported. Being a child that is growing up in a abusive life may think that it is okay to be hit or to call others name; that’s the main reason why when they grow up as adult they will be also abusive as a person.
What is a possible cause of solar prominences?
Answer:
The dense cloud of luminescent ionized gas protruding from the chromosphere of the Sun into the corona is termed as solar prominence. The prominences on certain occasions extend thousands of kilometers above the chromosphere of the Sun. The reasons for the solar prominences are not clear, however, they involve intense magnetic forces.
The prominences differ considerably in shape, size, and motion and are of two prime kinds, that is, quiescent and active. The solar prominences may form over timescales for a day and may prevail in the corona for many weeks or months, and loop hundreds of thousands of miles into space.
Dogs have 78 chromosomes in their diploid cells. how many chromosomes are in their haploid cells?
what is formed as a waste product in photosynthesis and used as a reactant in respiration.
What is the difference between a virus and bacteria
A nurse is teaching a class to parents about keeping medications and household cleaning supplies out of the reach of toddlers. the nurse explains that this is necessary because toddlers:
True or false if a plant grows toward the stimulus it shows a negative tropism
False.
A plant growing towards a stimulus is positive tropism.
Emir is taking a premed class where they need to study all of the structures of the body, including the nervous system, respiratory system, and reproductive system. he is taking a class on _____.
Studying the anatomy and physiology of the nervous system.
Explanation:The nervous system is one of the key systems studied in anatomy and physiology courses, including aspects of its structures and functions.
Understanding the nervous system involves anatomical and physiological techniques to explore its complexities at different levels.
Students in this course delve into topics like nervous system cells, sensory systems, motor systems, and more as they learn about the nervous system's role in the human body.
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Stimuli that increase the probability of a response they follow by removing an unwanted stimulus are called _____.
A nurse is caring for a client with the diagnosis of right ventricular failure. which condition unrelated to cardiac disease is the major cause of right ventricular failure?