Answer:
For an individual who is heterozygous for two genes, Aa and Bb, what does independent assortment predict? Offspring inheriting the recessive allele
of the first gene will also inherit the dominant
Explanation:
Aa x Bb= AB, Ab, aB and ab
so the first gene will also inherit the dominant gene
_________ are a variety of genes that have the potential to subvert the cell's own activities and push it to the malignant state. They encode proteins that have various functions in a cell's normal activities and can be converted to ________.
Answer:
The preferable options for the fill in the blanks will be -
Proto-oncogenes, oncogenes
Explanation:
Proto-oncogenes are a variety of genes that have the potential to subvert the cell's own activities and push it to the malignant state. They encode proteins that have various functions in a cell's normal activities and can be converted to oncogenes.
A proto-oncogene is a normal gene that becomes an oncogene when it is altered by mutation. Oncogenes causes cancer. Some Proto-oncogenes give signals during cell division. Other proto-oncogenes regulate apoptosis (programmed cell death).A habitat contains all of the abiotic and
biotic factors an organism needs to live.
Agree or
Disagree
Answer:
Agree
Explanation:
The biotic factors of an ecosystem include all the populations in a habitat, such as all the species of plants, animals, and fungi, as well as all the micro-organisms. Also recall that the nonliving factors are called abiotic factors. Abiotic factors include temperature, water, soil, and air.
Twenty-five people developed symptoms of nausea, vomiting, and diarrhea three to six hours after attending a church picnic where they ate a ham and green bean casserole with cream sauce. The most likely cause of this case of food intoxication is _________.
a. Cholera toxin.b. Erythrogenic toxin.c. Aflatoxin.d. Botulinum toxin.e. Staphylococcal enterotoxin.
Answer:
e. staphylococcal enterotoxin
Explanation:
Staphylococcal enterotoxin is a toxin that is produced by the bacteria Staphylococcus aureus. It is a toxin found inside the gastrointestinal tracts of the human body which is why it is called an enterotoxin and it results in food poisoning when consumed by humans.
Staphylococcal enterotoxin is proteinous in nature and it can be found on dairy products such as milk or cheeses that have been contaminated by Staphylococcus aureus.
After consumption of the contaminated milk or cheeses, the person begins to experience symptoms of nausea, diarrhea as well as vomiting.
Staphylococcal enterotoxin is a very heat stable toxin which means even though you heat up a food contaminated with this toxin, the bacteria may die by the toxins would still remain in the food.
The best way to avoid food poisoning by Staphylococcal enterotoxin is to avoid eating contaminated foods.
The likely cause of food intoxication with symptoms appearing within three to six hours after eating a ham and green bean casserole with cream sauce at a church picnic is Staphylococcal enterotoxin produced by Staphylococcus aureus.
Explanation:The most likely cause of the described case of food intoxication, where individuals developed symptoms such as nausea, vomiting, and diarrhea within three to six hours after eating at a church picnic, is Staphylococcal enterotoxin. This kind of food poisoning occurs when Staphylococcus aureus contaminates food and produces enterotoxins. These toxins can cause the mentioned symptoms quickly after ingestion and are commonly associated with improperly stored meat and dairy products or due to poor hygiene during food preparation.
Such incidents underline the importance of maintaining proper food safety measures like thorough handwashing, reheating cooked foods to the recommended temperature of at least 60 °C (140 °F), and ensuring raw meats are cooked adequately to prevent bacterial growth. Additionally, when faced with symptoms of gastrointestinal distress, oral rehydration therapy with electrolyte solutions is a key treatment modality, mainly to prevent dehydration and support recovery.
Lightweight fungal spores are surrounded by this
Answer:
Protective covering called Perdium
Explanation
Fungal spores are agents of asexual reproduction in Fungi.
The function is to protect the spores in fungi.It may be thick or thin depending upon the species. When the layers are two in number,
What is an accessory organ of digestion
Answer:
An organ that helps with digestion but is not part of the digestive tract. The accessory digestive organs are the tongue, salivary glands, pancreas, liver, and gallbladder.
Accessory organs of digestion, including the salivary glands, liver, pancreas, and gallbladder, provide critical enzymes and bile that aid in breaking down food into nutrients.
Explanation:An accessory organ of digestion is a vital component of the digestive system that assists in the breakdown of food. These organs are not part of the digestive tract itself through which food passes but contribute essential secretions that aid in digestion.
Accessory digestive organs include the salivary glands, which begin the chemical digestion in the mouth, and the gallbladder, liver, and pancreas, which release bile and enzymes into the small intestine. These secretions are critical for continuing the process of digestion, turning complex food substances into absorbable nutrients. The activity of these organs is regulated by hormones and their function is indispensable for a healthy digestion process.
When a school of fish spawns, the males and females release sperm and eggs into the water. A sperm and egg cell unite to form the first cell of an offspring, which develops independently of its parents. Which term describes this process?
a.
external fertilization
b.
asexual reproduction
c.
parthenogenesis
d.
internal fertilization
Answer:
a.
external fertilization
What effects do keystone specie shave on an ecosystem?
A. They make prey species extinct
B. They reproduce biodiversity
C. They keep populations of species balanced
D. They cause primary disturbances.
Answer:c
Explanation:
The adaptations of epipelagic organisms center around which two main need?
Answer:
1. The need to stay afloat
2. The need to eat and avoid being eaten
Explanation:
In 1931 ____________ built the first Transmisssion Electron Microscope, allowing structures of the cell to be seen for the first time.
A. Robert Hooke
B. Ernst Ruska
C. Anthony Van Leeuwenhoek
D. Louis Pasteur
Answer:
Ernst Ruska
Explanation:
Recent research has found that on one island of the Galapagos two finch species interbred. This interbreeding may have resulted in a hybrid species that ultimately led to the extinction of one of the species Darwin discovered. They call this speciation in reverse, or despeciation. Based on what you know about speciation, why are these terms appropriate?
Answer:
Speciation is the method by which unique species evolve from a common ancestor. In this case, two of these species that split from a common ancestor interbred and created a hybrid. This hybrid was apparently stronger and possibly better adapted to the environment, which led to extinction of a species formed by the initial speciation event.
Answer:
Speciation is the method by which unique species evolve from a common ancestor. In this case, two of these species that split from a common ancestor interbred and created a hybrid. This hybrid was apparently stronger and possibly better adapted to the environment, which led to extinction of a species formed by the initial speciation event.
Explanation:
Plato
According to the biological species concept, distinct species are defined by reproductive isolation--that is, by a lack of interbreeding and a failure to produce viable or fertile offspring if they do mate. In some cases, reproductive isolation may not be complete, and there may be rare instances of interbreeding. As long as hybridization is rare, biologists generally classify species as distinct under the biological species concept. Given what you've learned about the biological species concept, should G. fortis and G. scandens continue to be considered separate species?
Answer: if two morphological distinct organisms from two distinct geographical areas, can mate & reproduce successfully, then they must belong to the same species
Explanation:
place these in order
Water evaporates from a lake. Arrange the next steps of the water cycle in the correct order.
Water vapor condenses to form clouds.
Water flows down mountains and hills.
Water falls as rain, snow, and sleet.
Water joins streams or forms groundwater
Answer:
The correct order would be:
Water evaporates from a lake.
↓
Water vapor condenses to form clouds.
↓
Water falls as rain, snow, and sleet.
↓
Water flows down mountains and hills.
↓
Water joins streams or forms groundwater.
Water cycle refers to the cyclic movement of water in an environment. The water passes through various stages, namely:
evaporation and transpiration
condensation
precipitation
run off
Explanation:
Answer:
water falls as rain, snow, and sleetwater flows down mountains and hillswater joins streams or forms ground waterwater vapor condenses to form cloudsExplanation: this is the water cycle
Which statement describes a mushroom niche. Check all that apply
Answer:
Explanation:
can you add the photo of the question or add the answer choices
What is the difference between innate and adaptive immunity
Answer:
One is inherited (innate) from parents and the other is acquired after birth (adaptive)
Explanation:
Immunity refers to the ability of an organism to withstand or defend itself against diseases and infections caused by foreign bodies e.g pathogenic microbes. There are two major types of immunity organisms employ viz: Innate immunity and Adaptive immunity.
Innate immunity, also called natural immunity is the type of immunity transferred from parents to their offsprings i.e. inherited. The innate immunity is the primary form of defense that works generally to prevent entry of these foreign bodies into the system. This immunity is not pathogen-specific. A good experience of innate immunity in almost all plants and animals is the skin.
Adaptive immunity, also called acquired immunity, is the type that is acquired by an organism after birth and triggered when the innate form of immunity fails. Adaptive immunity is pathogen-specific i.e. it is responsive to a particular foreign body. A good example are the B and T cells (lymphocytes).
Answer:
from khan academy :)
What would be the most obvious outcome of repeated cell cycles consisting of s phase and m phase only?
Answer:
The cells created would continuously shrink overtime, getting smaller and smaller
Explanation:
If repeated cell cycles consisting of the S phase and M phase only it would result in a smaller cell type.
What is the cell cycle?The cell cycle is the cyclic event in which, a cell divide into two cells, this process is necessary for the growth and reproduction of living organisms.
In the cell cycle, there are several, events that occur that begin with the growth of the cell and division, with replication of their DNA content and other organelles.
The phases of the cell cycle are G1, S, G2, M, and cytokinesis, if only the S phase and M phase, after every division cell gets shortened, because the actual growing phase G2 is escaped.
Therefore, smaller cell size is the outcome of repeated cell cycles consisting of the S phase and M phase only, which escape the G2 phase.
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In a cool environment, an ectotherm is more likely to survive an extended period of food deprivation than would an equally sized endotherm because the ectotherm ________. a) maintains a higher basal metabolic rate b) expends more energy per kilogram of body mass than does the endotherm c) invests little energy in temperature regulation d) has greater insulation on its body surface
Answer:
c) Invests little energy in temperature regulation
Explanation:
Ectothermic animals are the organisms which are dependent on the external sources of heat in order to regulate their internal body temperature. In these organisms the mechanism for the regulation of heat through internal physiological process is absent. Due to such feature they don't need to spend energy to maintain the body heat in cool environment and thus they can operate at a very economical metabolic rate. And thus they became enable to survive for longer even in the condition of food deprivation.
Answer:
CExplanation:
1. Ectotherm: Ectotherm are cold-blooded animall whose regulation of body temperature depends on external sources, such as sunlight and many other environmental factors.
2. They do not maintain their body temperature by self, so their body temperature changes externally.
3. They are also known as cold blooded animals.
3.They invests little energy in temperature regulation.
4. Example of ectotherms: include the fishes, amphibians, reptiles, and invertebrates.
Researchers extracted DNA from blood samples obtained from two sisters and a brother affected by DYT2. The siblings' parents were neurologically normal, and there were no other DTY2 cases within the family.
Is the disease
A.
It is recessive because the father was neurologically normal and it is autosomal.
B.
It is dominant and because the mother was neurologically normal and it is autosomal.
C.
It is recessive and because the father was neurologically normal and it is X-linked.
D.
It is dominant and because the mother was neurologically normal and it is X-linked.
Answer:
Researchers extracted DNA from blood samples obtained from two sisters and a brother affected by DYT2. The siblings' parents were neurologically normal, and there were no other DTY2 cases within the family.
It is dominant and because the mother was neurologically normal and it is autosomal
Explanation:
Many different host factors can influence a person’s susceptibility or resistance to infectious disease. Some factors are associated with increased susceptibility, whereas other factors are associated with decreased susceptibility.
Organize the following factors, indicating those that increase and those that decrease host susceptibility to infectious disease.
1. proper nutrition
2. smoking & alcoholism
3. good hygiene
4. being very young or very old
How is blood pressure measured?
systolic - at rest
systolic - heart relaxed
systolic - heart pumping
diastolic - exercising
diastolic - heart relaxed
diastolic - heart pumping
Answer:
systolic - pumping, diastolic - relaxed
Explanation:
the period of contraction is called systole, and the period of relaxation is diastole. when measured, your systolic pressure is when the heart is pumping, and diastolic is in between beats when the heart relaxes. hope this helps :)
what percentage of the trash in the Great Pacific Garbage Patch comes from sources on land
Answer:
58%
Explanation:
Answer:
The answer is 80% From land !! I just took this test and took notes over the unit! You're welcome
Explanation:
Mucous membranes are quite thin and fragile. How can such delicate tissue provide defense against microbial invaders?
The mucus is a physical trap that contains a variety of antimicrobial chemicals.
The mucus contains a variety of antimicrobial chemicals and molecules.
The mucus secreted by the mucous membrane physically traps microbes.
Both the mucus and the outer layer of cells are shed frequently.
The mucus physically traps microbes, contains a variety of antimicrobial chemicals, and is shed constantly, along with the outermost layer of cells.
Answer:
The mucus physically traps microbes, contains a variety of antimicrobial chemicals, and is shed constantly, along with the outermost layer of cells.xplanation:
Rank these events in the order that they occur during the repair of double-strand breaks by recombination:
A. After invasion of the homologous chromosome the 3’ end of the invading strand acts as a primer for DNA synthesis.
B. The broken ends are processed, with the 5’-ending strand selectively degraded to create 3’ overhangs.
C. The 3’ single strand extensions invade the homologous chromosome, displacing the homologous strand and base pairing with the complementary strand.
D. As a result of the two strand invasions, the two homologues are linked at two places and are called a branched intermediate.
Which is not a characteristic of asexual reproduction? Plz help it’s due in 1 hour
Answer: Asexual reproduction is reproduction without sex. In this form of reproduction, a single organism or cell makes a copy of itself. The genes of the original and its copy will be the same, except for rare mutations. They are clones. ... The main process of asexual reproduction is mitosis.
Explanation: I got you bruv.
Brine shrimp live in salt water, but the level of salt in the water where they reside can differ dramatically from day to day or longer time scales. In very high salt concentrations, a brine shrimp _____ salt across its gills and maintains an internal salt concentration that is _____ relative to the water where it lives. In lower salt concentrations, a brine shrimp _____ salt water across its gills and maintains an internal salt concentration that is _____ relative to the water where it lives.
Answer:
The correct answer is "excretes; hypotonic; absorbs, hypertonic".
Explanation:
Cell's homeostasis is only conserved in an isotonic solution, since cells that are in an hypertonic solution (high salt concentration) tend to loss water, and in hypotonic solution (low salt concentration) tend to absorb water. Brine shrimp lives in waters that are both, hypertonic and hypotonic and has adapted to overcome this issue by excreting and absorbing salt across its gills. In very high salt concentrations, a brine shrimp "excretes" salt across its gills and maintains an internal salt concentration that is "hypotonic" relative to the water where it lives. In lower salt concentrations, a brine shrimp "absorbs" salt water across its gills and maintains an internal salt concentration that is "hypertonic" relative to the water where it lives.
Final answer:
Brine shrimp secrete salt in high salt concentrations to maintain a lower internal salt level, and absorb salt water in low salt concentrations to maintain a higher internal salt level.
Explanation:
Brine shrimp live in environments where the salt concentration can vary significantly. They have adapted osmoregulatory mechanisms to maintain internal salt balance through their gills in response to the varying salinity of their surroundings.
In very high salt concentrations, a brine shrimp secretes salt across its gills and maintains an internal salt concentration that is lower relative to the water where it lives. Conversely, in lower salt concentrations, a brine shrimp absorbs salt water across its gills and maintains an internal salt concentration that is higher relative to the water where it lives. This regulation allows them to stay isotonic with their environment, thus surviving whether the water is hypotonic or hypertonic to their cells.
A population of 8,250 mice occupies the sand dunes in a coastal area. A severe hurricane washes out several miles of sand dunes. As a result, only 50 mice remain. The population has experienced
A. horizontal gene transfer.
B. gene flow.
C. a founder effect.
D. a bottleneck.
The population has experienced bottleneck effect. So, the correct option is (D).
What is Bottleneck Effect?Population bottleneck is also known as genetic bottleneck. It is defined as a sharp decrease in population size which is caused by environmental events such as famine, earthquake, flood, fire, disease, and drought; or human activities such as specific, widespread violence or deliberate killing, and human population planning.
The bottleneck effect is a type of genetic drift in which allele frequencies in a population change based on chance events. The change in frequency is completely random.
For the above given information, population of mice continuously decrease which results in 50 mice. This shows the Bottleneck Effect.
Thus, the population has experienced bottleneck effect. So, the correct option is (D).
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Susan, a 67 year old female, is experiencing ataxia, or poor muscle coordination. when doctors perform a romberg test, the results are negative. this negative result indicates that susan's condition results from a peripheral nervous system disorder.
Correct Completed Questions; Susan, a 67 year old female is experiencing ataxia, or poor muscle coordination. Doctors perform a neurological exam and they find that Susan is not positive for the Romberg test. Describe what these findings suggest about the sources of Susan's ataxia.
Answer:s
In order to test for balance and positioning(proprioception) as a measure of neurological function, or to test level of intoxication alcohol during driving, Romberg test is usually conducted,which can be negative or positive.It is generally used to investigate the cause of loss of motor control in individuals.
Explanation:
A positive result showed that her ataxia was due to loss of positioning due to loss of sensory from sensory neurons.However if negative as in the case of Susan, then it is to due to abnormality/dysfunctions in the cerebellum, and not due to loss of sensory functions,
How are the two kingdoms of bacteria similar?
Answer:
There are two kingdoms of prokaryotes. These are the bacteria (or eubacteria ) and the archaebacteria (or the Archaea ). The members of these two kingdoms appear similar in shape and appearance.
The two kingdoms of bacteria are similar in that both are prokaryotes.
What are the kingdoms of bacteria ?Eubacteria are the most common type of bacteria. They are found in all environments and can be either harmful or beneficial to humans.
Archaea are a group of bacteria that are found in extreme environments, such as hot springs and acidic lakes. They are not as common as eubacteria, but they play an important role in the environment.
The two kingdoms of bacteria are similar in the following ways:
Both are prokaryotes. This means that they do not have a nucleus or other membrane-bound organelles.Both reproduce by binary fission. This is a type of cell division in which one cell divides into two identical daughter cells.Both use DNA as their genetic material. DNA is the molecule that stores genetic information.Find out more on bacteria at https://brainly.com/question/22202103
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03.05 MC) What is the relationship between genes, DNA, and proteins? (2 points) Select one: a. Proteins are regions of genes that carry the code for making DNA. b. DNA contains amino acids that carry the code for a protein that makes genes. c. Proteins are made up of DNA that contains the code to make genes. d. Genes are regions of DNA that carry the code for making proteins.
Answer:
The answer is D!
Explanation:
"Genes are regions of DNA that carry the code for making proteins."
Genes are regions of DNA on chromosomes that carry the code for making proteins, hence option D is correct.
What is DNA?One of the guiding concepts of molecular biology is the information transfer from DNA to RNA to proteins. It is so crucial that it is occasionally referred to as the "core dogma." Information from genes is utilized to generate proteins through the processes of transcription and translation.
The nucleotide sequences of DNA correspond to certain genes. These genes produce particular proteins with a role in phenotypic development. Proteins are the byproducts of genes, while DNA makes up genes. Between a gene and a phenotype, proteins act as an intermediate.
Your human anatomy is constructed and preserved by DNA. Genes are parts of your DNA that give you the physical traits that make you special.
Therefore, DNA on chromosomes that carry the code for making proteins, hence option D is correct.
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Match the following terms to their proper description:
middle ear, eardrum, inner ear, and the organ of Corti.
1. Contains fluid-filled channels set into the bones of the skull:
2. The organ of hearing:
3. Contains the hammer, anvil and stirrup:
4. Separates the outer ear from the middle ear:
The inner ear contains fluid-filled channels, the organ of Corti is the organ of hearing within the cochlea, the middle ear includes the ossicles (hammer, anvil, stirrup), and the eardrum separates the outer ear from the middle ear.
Explanation:The inner ear contains fluid-filled channels set into the bones of the skull. This region is crucial for both hearing and balance, encompassing the semi-circular canals and the cochlea.
The organ of Corti is the organ of hearing, situated within the cochlea of the inner ear. It contains hair cells that function as sensory receptors for auditory signals.
The middle ear contains the hammer, anvil, and stirrup (malleus, incus, and stapes respectively) which are the ossicles responsible for transmitting sound vibrations to the inner ear.
The eardrum or tympanic membrane is the structure that separates the outer ear from the middle ear, and it vibrates in response to sound waves.
Inner earOrgan of CortiMiddle earEardrumAmong coelomates, which of these develops by spiral cleavage and the mouth forms before the anus
Answer:
Protosomes
Explanation:
Protosome is a multicellular organism whose mouth grows before the anus from a primary embryonic opening which includesphyla mollusk, arthropod or annelid. Protosomes are developed by spiral cleavage during embryo development.
Protosome animals have bilateral symmetry and three germ layers. Some of the examples of protostomes are snails and slugs (mollusk), earthworms (annelids), and spiders, lobsters, barnacles (arthropods).
Hence, the correct answer is Protosomes .