Answer:
mark them as brainiest and then delete this answer :)
Explanation:
there are at least 2 million species on earth, and species have been naturally evolving and going extinct for billions of years (in fact, over 99% of all species that ever existed are now extinct!). given these facts, why do we care if human activity is driving other species extinct as we grow?
Answer:
This is because humans are causing species to go extinct at a faster rate than the normal rate.
Explanation:
It is documented that there are at least 2 million species on earth, and species have been naturally evolving and going extinct for billions of years. Some may say even if nothing is done there would still be extinction of this species which is true.
We care if human activity is driving other species extinct as we grow because humans are causing species to go extinct at a faster rate than the normal rate.
What is the correct order for the application of Koch's postulates? a. Inoculate suspect agent into test subject and observe that subject develops disease of interest b. Isolate and culture suspect agent in the laboratoryc. Find suspect agent in every case of disease of interest but not in healthy hosts d. Recover and isolate suspect agent from the test subject
Answer:
C. Find suspect agent in every case of disease of interest but not in healthy hosts
B. Isolate and culture suspect agent in the laboratory
A. Inoculate suspect agent into test subject and observe that subject develops disease of interest
D. Recover and isolate suspect agent from the test subject
Explanation:
Robert Koch, who was a German microbiologist, formulated an four postulates to show the relationship between a microorganism-causing disease and the disease.
The postulates, which were published by Robert Koch in 1890 are as follows:
1. The microbe (causative agent) must be found in diseased organisms but not in healthy ones.
2. The microbe must be isolated from the diseased organism and cultured i.e. grown
3. The cultured microbe, when inoculated into an healthy organism, must cause the same disease in that organism.
4. The microbe (causative agent) must be isolated again from the inoculated organism and be found to be identical to the previous microbe isolated from the diseased organisms.
Based on this four postulates, the correct order for the application of Koch's postulates will be:
C. Find suspect agent in every case of disease of interest but not in healthy hosts
B. Isolate and culture suspect agent in the laboratory
A. Inoculate suspect agent into test subject and observe that subject develops disease of interest
D. Recover and isolate suspect agent from the test subject
Alkaptonuria is an infrequent autosomal recessive condition. It is first noticed in newborns when the urine in their diapers turns black upon exposure to air. The condition is caused by the defective transport of the amino acid phenylalanine through the intestinal walls during digestion. About 4 people per 1000 are carriers of alkaptonuria. Sara and James had never heard of alkaptonuria and were shocked to discover that their first child had the condition. Sara's sister Mary and her husband Frank are planning to have a family and are concerned about the possibility of alkaptonuria in one of their children.
The four adults (Sara, James, Mary, and Frank) seek information from a neighbor who is a retired physician.After discussing their family histories, the neighbor says, " I never took genetics, but I know from my many years in practice that Sara and James are both carriers of this recessive condition. Since their first child had the condition, there is a very low chance that the next child will also have it, because the odds of having two children with a recessive condition are very low. Mary and Frank have no chance of having a child with alkaptonuria because Frank has no family history of the condition."The two couples each have babies and both babies have alkaptonuria.
Required:
a. What is the probability that the second child of Mary and Frank will have alkaptonuria?
b. What is the chance that the third child of Sara and James will be free of the condition?
c.The couples are worried that one of their grandchildren will inherit alkaptonuria.
d. What is the chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate has no family history?
e.The couples are worried that one of their grandchildren will inherit alkaptonuria.
f. What is the chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate has no family history?
Answer:
See the answer below
Explanation:
Let the disorder be represented by the allele a.
Since the disease is an autosomal recessive one, affected individuals will have the genotype aa and normal individuals will have the genotype Aa or AA.
Since the four adults are carriers, their genotypes would be Aa.
Aa x Aa
Progeny: AA 2Aa aa
Probability of being affected = 1/4
Probability of being a carrier = 1/2
Probability of not being affected = 3/4
(a) The chance that the child second child of Mary and Frank will have alkaptonuria = 1/2
(b) The chance that the third child of Sara and James will be free of the condition = 3/4
(c)
(d) If someone has no family history of the disorder, their genotype would be AA.
AA x aa
4 Aa
The chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate has no family history = 0
(e)
(f) The chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate has no family history = 0
Assuming a single diallelic gene that express complete dominance is coding for the condition, A) 1/4 = 25% / B) 3/4 = 75% / C) 100% or 50% depending on the mates genotype.
---------------------------
Available data:
Alkaptonuria is an infrequent autosomal recessive conditionSara and James have no Alkaptonuria, but had a child expresing the condition.Mary and Frank had a child expressing the condition.The two couples each have babies and both babies have alkaptonuriaWe will assume that the gene coding for this trait is diallelic, and that expresses complete dominance, following the Mendelian inheritance pattern. So, let us say that
Allele A is dominant over a and expresses normal phenotypeAllele a is the recessive one and expresses alkaptonuriaGenotype Phenotype
AA Normal
Aa Normal carrier
aa Alkaptonuria
Since Sara and James had an affected child, we can assume they are both heter0zyg0us for the trait. The child inherited one recessive allele from Sara and one recessive allele from James.
We know that Frank has no family history of the condition. However, the allele could be present in his family, hidden by dominant alleles in heter0zyg0us state.
And because Mary and Frank also had an affected child, we can also assume they are heter0zyg0us for the trait, providing each one recessive allele to the baby.
So both crosses would be the same, between two heter0zyg0us individuals.
So let us analyze the crosses and the probabilities of getting affected and healthy children.
Cross) Mother x Father
Parentals) Aa x Aa
Gametes) A a A a
Punnett square) A a
A AA Aa
a Aa aa
F1) Genotypes
1/4 = 25% of the progeny is expected to be h0m0zygous dominant, AA1/2 = 50% of the progey is expected to be heter0zyg0us, Aa1/4 = 25% of the progeny is expected to be h0m0zyg0us recessive, aa.Phenotypes
3/4 = 75% of the progeny is expected to express normal phenotype (AA + Aa)1/4 = 25% of the progeny is expected to express alkaptonuria (aa)a. What is the probability that the second child of Mary and Frank will have alkaptonuria?
The probabilities of having an affected child is always 1/4 = 25%.
This means that every time they are having a baby, the chances for that child to express the condition is 25%.
The genotype is this child will be aa.
****
b. What is the chance that the third child of Sara and James will be free of the condition?
The probabilities of having a normal child is always 3/4 = 75%.
This means that every time they are having a baby, the chances for that child to express the normal phenotype is 75%.
This child could be either AA or Aa.
****
The couples are worried that one of their grandchildren will inherit alkaptonuria.
d. What is the chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate has no family history?
There are two options.
Option 1The genotype of the affected child is aa.
If this person's mate is h0m0zyg0us dominant, AA, the probabilities of having an affected child is 0%.
Cross: affected child x h0m0zyg0us dominant unaffected mate
Parentals) aa x AA
F2) 100% Aa ⇒ 100% healthy children and carriers
Option 2The genotype of the affected child is aa.
If this person's mate is heter0zyg0us Aa, the probabilities of having an affected child is 50%.
Cross: affected child x heter0zyg0us unaffected mate
Parentals) aa x Aa
F2) 50% Aa ⇒ healthy children and carryiers
50% aa ⇒ affected children
So, the chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate is normal, depends on the mates genotype,
h0m0zyg0us dominant ⇒ 100% normal childrenheter0zyg0us ⇒ 50% normal children and 50% affected children--------------------------------
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Minerals regulate body fluids, assist in various body functions, contribute to growth, and aid in building tissues. True False
When the spine develops an S- or C-shaped curve, this imbalance is referred to as which of the following?a. Lordosis b. Flatback c. Scoliosis d. Kyphosis
Answer:
c. Scoliosis
Explanation:
Scoliosis is a defect which is as a result of the spine being imbalanced and developing into an S- or C-shaped curve.
The spine is usually curved in an uncharacteristic manner and is commonly found in people with cerebral palsy.
Treatment involves surgical operations or the use of braces to fix the spines back to their original positions.
Answer: lordosis
Explanation:
If it’s says ‘when spine curves inward at the lower back...
Answer the question below (This is just a test!!)
Answer:
We make big decisions in life. Like cooking, fabric, eating, oils we use. Tooth paste, brush, shampoo and conditioner. People come up with experiments. Just normally everything we do in life is similar to what scientists do.
In her studies of chimpanzee behavior, Jane Goodall collected both qualitative
and quantitative data. Which of the following is an example of quantitative data?
(From Topic: 1.3 In studying nature, scientists form and test hypotheses)
An example of quantitative data is mothers and their infants typically nap for two to three hours each afternoon. Therefore, option A is correct.
What is quantitative data ?The data expressing a certain quantity and amount or range is called as quantitative data. The two main types of quantitative data are discrete data and continuous data.
The difference between the qualitative data and quantitative data is the quantitative data is numbers-based, countable, or measurable while qualitative data is interpretation-based, descriptive, and relating to language.
In her studies of chimpanzee behavior, Jane Goodall collected both qualitative and quantitative data. Therefore, An example of quantitative data is mothers and their infants typically nap for two to three hours each afternoon.
Thus, option A is correct.
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Your question is incomplete, probably your question was
In her studies of chimpanzee behavior, Jane Goodall collected both qualitative
and quantitative data. Which of the following is an example of quantitative data?
(From Topic: 1.3 In studying nature, scientists form and test hypotheses)
A. Mothers and their infants typically nap for two to three hours each afternoon.
B. baiting the animals with bananas helped to attract them close enough for her to observe their social behavior and to photograph them.
C. researchers have observed chimpanzees using more than half a dozen tools for assorted purposes.
D. Other animals, including some birds and dolphins, are now known to use tools.
what a dependent variable
A. diretly change by the experimenter
B. manipulated by charges to the independent variable
C. a variable that is kept constant
D. a variable that is used as a control
Answer:
The correct answer would be B, manipulated by changes to the independent variable.
Explanation:
I hope this helps:)
1. What happens to our body when we are exposed to temperature extremes? What do we do to control our internal temperature?
Explanation:
when we are in heat our body companciates with surrounding by profusely sweating
we can control our internal temperature by escape in time from heat and
Which is a basic characteristic of all living cells?
cell wall
protein coat
energy metabolism
antibiotic resistance
Answer:
Energy Metabolism
Explanation:
In order to a living cell you need to be able to reproduce, have energy metabolism, etc.
This is a basic characteristic of all living cells called as the energy metabolism.
What is the Energy metabolism ?
Energy metabolism refers to all of the reactions worried in producing adenosine triphosphate (ATP) from nutrients, such as each cardio respiration (oxygen present), anaerobic respiration (fermentation) in addition to fatty acid and amino acid metabolism.
The residing cells of each organism continuously use strength to live to tell the tale and grow. Cells ruin down complicated carbohydrates into easy sugars that the cell can use for strength. Muscle cells can also additionally patron strength to construct lengthy muscle proteins from small amino acid molecules.
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Which is true of studies of height in children from around the
world?
Ethnic origin is a stronger predictor than socioeconomic status.
O Socioeconomic status is a stronger predictor than nutrition.
O Later-born children are generally taller than first-born children.
O Children from a rural area are generally taller than children from
an urban area
Answer:
the first one is right..
State 10 characteristics of class Mammalia
Which statement is true? Lipids are a type of fat. Fats are a type of lipid. Fats and lipids are unrelated. All lipids are fats, and all fats are lipids.
Answer:
Lipids are a type of fat.Fats are just one type of lipid, a category of molecules united by their inability to mix well with water. Lipids tend to be hydrophobic, nonpolar, and made up mostly of hydrocarbon chains
Explanation:
Answer:
B
Explanation:
!!!!!!!
What is the definition hereditability?
When a true-breeding blue salamander is mated to a true-breeding red salamander, 100%of the offspring are blue. Assuming that salamander skin color is determined by a singlegene, which of the following statements are correct?A. The blue allele is dominant to the red alleleB. The red allele is recessive to the blue alleleC. The blue gene is dominant to the red geneD. The red gene is recessive to the blue geneE. Both A and BF. Both C and D
Answer:
Both A and B
Explanation:
True breed is a breed that is 100% identical with the parent, the traits inherited from that parents are 100% controlled by same allele of a gene hence they are exact copy.
A single gene can have several alleles, it is the allele that combines together that determines what is seen or expressed.
Allele for blue colour is dominant over allele for red color and that is what led to the phenotypic appearance of the offspring which is blue and the red color is masked. Also, because they are true breeds it means the genotype have the same allele e.g. AA
2. What are the largest groups of water animals
Answer:
a cetaceans whales and stuff
Explanation:
There huge
Which statement about vacuoles is true? Only plant cells contain vacuoles. Only animal cells contain vacuoles. Vacuoles are larger in plant cells than in animal cells. Vacuoles are larger in animal cells than in plant cells.
Answer:
Vacuoles are larger in plant cells than in animal cells
Answer:
vacuoles are larger in plant cell than in animal cell
One difference between plant and animal cells is that (1) plant cells have cell walls; animal cells don't (2) plant cells can't move; animal cells can (3) plant cells live in water; animal cells don't ( 4) plant cells have a nucleus; animal cells don't (5) plant cells have vacuoles; animal cells don't
Answer:
1) Plants cells have cell walls; animal cells don’t.
Explanation:
Cell walls function is to help cells stick to each other, which is good for plants since they don’t move around. But as for animal, they need to move around so it’s not good for them to have it.
Without cell walls, animal cells can take on different shapes!
It makes it able to move easier, flexible.
Hope it helped! Please mark brainliest! Thank you! :)
What is the independent variable in this hypothesis, " Palo verde trees experience more growth during years with higher rainfall"?
Answer:
AMOUNT OF RAINFALL
Explanation:
The independent variable in an experiment is the variable that the scientist/experimenter manipulates or changes in order to bring about a response in the dependent variable.
In this case, the independent variable is the AMOUNT OF RAINFALL that the Palo verde trees were exposed to. This is because the amount of rainfall received is what is changed in this experiment while the growth of the Palo verde trees is the dependent variable, which is dependent on the amount of rainfall received (independent).
Someone please help me , my work is due tomorrow. How does a Volcano effect the availability of natural resources? ( including food webs, energy, matter, etc.)
Answer:
Explanation:
Earthquake smoke fires ash falling from the sky
Which of the following about the plasma membrane is not true?
a. It is made of lipid molecules b. It protects the cell's cytoplasm
c. It contains proteins d. It contains most of a cell's DNA
d. it contains most of the cells DNA
The folowing about the plasma membrane is not true is that It contains most of a cell's DNA. Correct Option is 4.
The plasma membrane, also known as the cell membrane, does not contain most of a cell's DNA. The DNA of a cell is primarily found within the nucleus in eukaryotic cells, or in the nucleoid region in prokaryotic cells. The plasma membrane, on the other hand, forms the outer boundary of the cell and separates the internal contents (cytoplasm) from the external environment.
It plays a role in protecting the cell, regulating the movement of substances in and out of the cell, and facilitating communication with neighboring cells. The plasma membrane is primarily composed of lipid molecules (option a) arranged in a phospholipid bilayer, along with various proteins (option c) that have diverse functions in cell signaling, transport, and structural support.
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which statement best explains a way in which a cell gets rid of waste?
Explanation:
A.They filter waste and extra water from blood so they can create urine, which is removed from the body.
The statement that best explains the way in which a cell gets rid of waste is that the secretory vesicle/ transport vesicle fuses with the plasma membrane and releases its content outside the cell.
What is exocytosis?Exocytosis is the process of secretory vesicles fusing with the plasma membrane, resulting in the extracellular release of vesicle content.
What occurs during exocytosis?It leads to integration of new proteins and lipids into the plasma membrane.Release of the content of secretory vesicle to extracellular medium.To learn more about secretory vesicle, vacuole, exocytosis and transport vesicle here,
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Oh Scientists are using a control sample that is known to be from bighearted carp in an EDNA surveillance study. What purpose does this control serve?
Answer:
d
Explanation:
DNA has become a boon in surveillance programs that is used to monitor the presence of invasive species in the aquatic system and can monitor the presence of nucleic acid water even if the animals are not there
The Karez well system _______.
a.
was the first known use of wells
b.
was a postindustrial system
c.
transported groundwater from a distance
d.
all of the above
Please select the best answer from the choices provided
A
B
C
D
Answer:
c. transported groundwater from a distance
Explanation:
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How do dendrites help the function of nerve cells?
They help the neuron block messages from the dendrites of another neuron.
They help the neuron receive messages from the dendrites of another neuron.
They help the neuron block messages from the axon of another neuron.
They help the neuron receive messages from the axon of another neuron.
Explanation:Dendrites are the segments of the neuron that receive stimulation in order for the cell to become active. They conduct electrical messages to the neuron cell body for the cell to function
Dendrites play important role in conducting electrical messages to the neuron cell body for the cell to function. They help the neuron receive messages from the axon of another neuron. Thus option D is correct.
What is the function of dendrites ?Dendrites are parts of neurons found in the brain and spinal cord.
It comprises cytoskeletal structures, Golgi apparatus, ribosomes and smooth endoplasmic reticulum and involved in signal transmission.
The major function is receiving electrical messages and transfer the received information to the soma of the neuron.
It collects and stores all information from axon terminals.
Dendrites also collect messages through other neurons towards the brain and the brain sends the instructions back to different parts of the body.
Thus option D is correct
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What phrase describes a good scientific question?
has a wide focus
addresses a gap in knowledge
does not lead to a testable hypothesis
has a simple yes or no answer
Answer:
addresses a gap in knowledge
Explanation:
Every scientific experiment begins with an observation or a question. This question is called a scientific question. A scientific question is a question that helps the scientist or experimenter get to the root of an investigation, like a head start. One important character a scientific question is that it must be able to be tested via experimentation.
In this question, the phrase that best describes a good scientific question is that it should ADDRESS A GAP IN KNOWLEDGE. This means that it should aim at filling a void or contribute to knowledge.
Answer:
The question relies on moral or social values. (d)
Explanation:
Edge 2020 the other guy is wrong
In multicellular organisms, such as human beings, cells combine to form tissues, which combine to form organs, which combine to form organ systems, which all together make up the organism and enable it to function. This is an example of which theme in biology? Select one:
a. structure and function
b. unity and diversity
c. regulation
d. levels of organization
Explanation:
structure and function
Answer:
d
Explanation:
what units would you use to measure a red blood cell
When you consider the present and/or past environment of Mars, could you find all the requirements for life?
Answer:
no
Explanl
l vidaal atiense
LITERALLY DOES ANYONE UNDERSTAND THIS??????
Answer:
understand what?
Explanation:
I think you forgot to add an attachment