Answer:
Two strands.
Explanation:
Answer:
2 strands
Explanation:
DNA is a double-stranded helix. During replication, the helix is broken apart and DNA polymerase adds new nucleotides to both strands. This results in the creation of new DNA. DNA will always have 2 strands.
distinguish between l-form bacteria and bacteria
Answer:
your answer Miss. or Mr.
We respect Dr. Trudeau and all those earlier scientists who did the best they could within the contemporary understanding of the problem they addressed and utilizing the materials and technology they had at hand. Modern-day biologists like to talk about resistance/susceptibility genes and patterns of inheritance, rather than family blood. They think about infectious disease in terms of microbes and pathogenicity, rather than speaking of bad humors. They have identified vitamins and other nutrients that are abundant in some foodstuffs and lacking in other that are essential for optimal immune function. Without the benefit of such modern formulations, Dr. Trudeau, by a disciplined application of scientific curiosity and careful, clever methodology, shed light on each of these concerns, light that helped to illuminate the minds of scientists who came after. Still, a look at his original paper leaves us wondering, were the rabbits genetically identical? Probably not! Why? Were they all of the same sex and age? Couldn’t he have given the animals kept on short rations just a smaller amount of the same varieties of food available to the animals fed abundantly—after all, there might be some important nutrient missing in potatoes. In light of the title of the paper, why not measure bacterial numbers in the rabbits on post mortem rather than just survival time? (In a subsequent paper, he did exactly that.) Once you start critiquing an experiment from 100 years ago, or 10 years ago, or sometimes even last year, it’s hard to stop.
Can you think of anything else you would have changed about the Rabbit Island Experiment?
Answer:
Ala escala del uno al diez
A. If 15 ml of a liquid has a mass of 11.85 grams,
(1) What is the density?
(2) What is the liquid?
Answer:
1. 0.79g/mL
2. Ethanol
Explanation:
The density of a substance can be calculated by using the formula;
Density (g/mL) = mass (g) ÷ volume (mL)
According to the information provided in the question, mass = 11.85grams, volume = 15mL.
Hence, density = 11.85g ÷ 15mL
= 0.79
Density of the liquid = 0.79g/mL.
Substances usually have their own unique density, which is one of the properties that distinguish them. In this case, ETHANOL is the liquid that possesses a density of 0.79g/mL.
Which method of genetic recombination is illustrated in the diagram?
Answer:
The correct answer is this one "independent assortment." Independent assortment refers to the formation of random combinations of chromosomes in meiosis and of genes on different pairs of homologous chromosomes.
Explanation:
I wish This would be helpfull for you
Label flower parts pls
Answer:
1Anther
2Filament
3Stamen
4Stigma
5Style
6Ovary
7Pistil or gynoecium
8Ovule
9Petal
10Sepal
Explanation:
Answer:
AntherFilamentStamenStigmaStyleOvaryPistilOvula/OvumPetalSepal
1- Explain the following expression:
"reversible manner".
Answer: means that oxyhaemoglobin thus formed can break down at tissues to relaese haemoglobin and oxygen back
Explanation:gooooooooooooooooooooooogle
Decrease in blood pressure in directly causes widespread VASCONSTRICTION Resulting in a rise in blood pressure is this a negative or positive feedback ?
A scientist wants to examine a genetic disease in humans. The scientist hypothesizes that the disease can be treated by using gene therapy. Humans take a long time to reproduce and develop, so the scientist will have to
give up on testing the hypothesis.
test the hypothesis for a very long time.
develop new methods to test the hypothesis.
find a way to make humans reproduce faster.
Answer:
answer is B
Explanation:
its on edg
Answer: C. develop new methods to test the hypothesis.
Explanation:
In this part you will be answering 2 different questions, Please use a full sentence.
Answer:
search the answer from Urban dictionary
Explanation:
A control group is a group that:
Answer:
It is a group designed to not be affected by any variables and to be used as a comparison to the other groups. It helps increase the reliability of your results, as it shows your independent variable is what made something happen in your experiment.
increasing intracellular cAMP leads to smooth muscle relaxation by: Group of answer choices inhibiting IP3 channels, leading to decreased Ca2 in the sarcoplasm and reduced contraction. Increasing the relative activity of MLCP, leading to a decrease in tension. Activating K channels, increasing K leaking out of the cell which hyperpolarizes it and decreases the likelihood of Ca2 entry. Lower levels of MLCK activity, leading to decreased contraction.
Answer:
1. Inhibiting IP3 channels, leading to decreased Ca2 in the sarcoplasm and reduced contraction.
2. Increasing the relative activity of MLCP, leading to a decrease in tension.
3. Activating K channels, increasing K leaking out of the cell which hyperpolarizes it and decreases the likelihood of Ca2 entry.
Explanation
In smooth muscle, cyclic AMP (cAMP) mediates relaxation because cAMP inhibits a specific kinase required for myosin light chain protein (MLCP) phosphorylation, thereby triggering contraction in the smooth muscles. It has been shown that cAMP inhibits 1,4,5-trisphosphate (IP3)-dependent calcium ions (Ca 2+) release by activation of the cGMP-dependent protein kinase (PKG). PKG proteins act to modulate Ca2+ oscillations by stimulating sarcoplasmic Ca2+-ATPase membrane proteins, increasing Ca2+ in the sarcoplasmic reticulum stores and Ca2+ efflux from the cells, and activate voltage-gated potassium (K) channels, thereby leading to membrane hyperpolarization and reducing Ca2+ entry through Ca2+ channels.
. It took 500 newtons of force to push a car 4 meters. How much work was done?
Answer:
2000Nm
Explanation:
work =force *distance
500*4=2000
Answer:
2,000J
Explanation:
work done = force × distance
From the question
force = 500 N
distance = 4 m
We have
work done = 500 × 4
We have the final answer as
2000 J
Inorganic, crystalline substances found naturally within earth are known as
Answer:
Minerals.
Explanation:
Minerals can be defined as any form of naturally occurring, inorganic solid substance characterized by a crystal structure. Also, minerals are homogeneous in nature with a defined chemical composition and characterized by a crystal structure comprising of ions, atoms, or molecules in an orderly arrangement.
Generally, molecules attach on the inside of a mineral to give it shape. Therefore, the molecule of a mineral is a crystal three-dimensional regular structure (arrangement) of chemical particles that are bonded together and determines its shape.
Due to the fact that these molecules are structurally arranged or ordered and are repeated by different symmetrical and translational operations they determine the shape of minerals.
Hence, inorganic, crystalline substances found naturally within earth are known as minerals. Some examples of minerals are iron, copper, aluminum, tin, coal, quartz, feldspar, mica, etc.
The possibility of a baby having a certain genetic trait is in the ratio of 3.1. Give the probability of this occurring as a fraction and as a
percentage. Explain.
Tyn your answer below
Describe the results of a protozoan culture
jellyfish is considered as the deadliest marine animal in the world. how it causes fatal to human?
Answer:
i got stung by a jellyfish :( anyways lol heres why they are fatal to humans
Explanation:
Their venom is considered to be among the most deadly in the world, containing toxins that attack the heart, nervous system, and skin cells. It is so overpoweringly painful, human victims have been known to go into shock and drown or die of heart failure before even reaching shore.
What organelle does a plant cell have in common with bacterial cells, but not animal cells?
Answer:
ribosomes
The Protein Factory. Plant, bacteria and animal cells all have ribosomes that contain RNA and proteins. Ribosomes translate nucleic acids into amino acids to make proteins. Proteins form enzymes and play a role in every function within cells.
Outline the levels of organization starting with the smallest, organisms.
Answer:
Organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere. These have been arranged from the smallest to the largest. The biosphere is the largest level of organization while the organelle is the smallest. However, the basic form of life begins with the cell. Many cells together form a tissue and several tissue form an organ.
Please answer quickly!! It would mean a lot (: uh have a great day and good luck with your own questions!
How is oxygen and carbon dioxide exchanged between the cells of the body?
Gas Exchange | Anatomy and Physiology II
Question 3 options:
oxygen moves from the blood into the cells of the body, and carbon dioxide moves from the cells of the body into the blood
both oxygen and carbon dioxide move from the blood into the cells of the body
carbon dioxide moves from the blood into the cells of the body, and oxgyen moves from the cells of the body into the blood
both oxygen and carbon dioxide move from the cells of the body into the blood
Answer:
oxygen moves from the blood into the cell and the cell uses it in cellular respiration and then the CO2 goes from the cell to the blood to get it back to the lungs to get rid of it
Explanation:
Humans should consider microbes as beneficial organisms for all of the following reasons except:
Group of answer choices
they purify water in the hydrosphere.
they consume carbon dioxide during photosynthesis.
they decompose organic waste in the geosphere.
they generate oxygen in the hydrosphere.
they filter ultraviolet radiation in the atmosphere.
Answer:
they purify water in the hydrosphere
Microbes are beneficial as well as detrimental to the environment. They do not purify water in the hydrosphere instead pollute them. Option (A) is correct.
How does microbes affect water quality ?The quantity and variety of native microorganisms in an aquatic environment have a significant impact on water quality .
Physical, biological, and chemical contaminants from human activity can build up in aquatic systems and have significant ecological effects that can be detrimental in nature.
Microbial activity in the aquifer may have an impact on a number of ground-water quality indices, including pH, oxidation/reduction (redox) status, dissolved oxygen, or the presence of certain mineral components. This is especially true if there are elements in the aquifer that bacteria may use to flourish.
Therefore, option (A) is correct option.
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Which best describes a recessive allele?
A. Always inherited from a parent when a dominant allele is inherited from the other parent.
B. Never inherited from a parent when a dominant allele is inherited from the other parent.
C. Only determines phenotype when a dominant allele for the same trait is present.
D. Does not determine phenotype when a dominant allele for the same trait is present.
Answer:
B!
Explanation:
A recessive allele can't be shown in the child unless there is no dominant allele.
Hope this helps, please mark me brainliest if it does! :)
Answer:option d
Explanation:
because ressesive alleles is not exhibited when a dominant allele is present. it may help to find genotype but not phenotype.
Fossils are preserved remains of ancient life. Which of the following would be considered fossils? A. hair and flesh of a woolly mammoth preserved in ice B. dinosaur footprints preserved in rock C. rock-like pieces of bones from an ancient fish D. all of the above
Answer:
d
Explanation:
please give brainlest need 2 more
Tillage can release pollutants in the soil and
increase erosion.
o decrease erosion
o promote soil compaction
O promote fertilizer retention
Answer:
Increase erosion because the soil is being loosened
Explanation:
Tillage can release pollutants in the soil and - option. increase erosion which is applied to conventional tillage.
The preparation of the soil by mechanical agitation such as digging, plowing, overturning, and other ways, in agriculture for the purpose of plantation and cultivation of crops.
Disadvantageous of Tillage:
causes an eventual loss of soil production.accumulating pollutants in topsoil due to the movement of the components present in the soil.Increases in erosion rates due to loose soil.The destruction of earthworm pathways and root channels leads to a decrease in the quality of the soil.Thus, the correct answer is - option. increase erosion
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Which factor would increase population size?
a. more competitors
b. unable to hide, defend, or migrate
c. ability to resist disease
d. inadequate food and resources
e. extreme temperatures
Answer:
c
Explanation:
All the others would begin to kill off a population
In the southeastern United States, there is a small type of lizard called a fence lizard. They have short legs and live under leaves and dead logs.
Over the last 70 years, fire ants have moved into the lizard's environment. When fire ants sting the lizards on their body, the lizards can die
Scientists have observed that in places with fire ants and lizards living together for a long time, the lizards have longer legs. In places where fire
ants have only been there a short time, the lizards' legs are shorter overall
Fire ants move into a new environment with the lizards. What will most likely happen to the lizard population over the next several years?
A. Some of the lizards would try to develop new traits to avoid the ants, and they would pass on those traits to their
offspring. The other lizards would die
B. All of the lizards would try to develop new traits to avoid the ants. They would all survive and pass on those traits to
their offspring
OC. Due to random mutations, some lizard offspring are born with different traits that help them avoid the fire ants. These
offspring will most likely survive and reproduce, while the lizards born without those traits will die.
Select an answer
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Answer:
Answer is C. Due to random mutations, some lizard offspring are born with different traits that help them avoid the fire ants. These offspring will most likely survive and reproduce, while the lizards born without those traits will die.
Explanation:
If muscle A contracts and causes movement of some sort, and muscle B helps muscle
A accomplish this task, and muscle C does the opposite of A, then muscle A is a(n)
muscle, muscle B is a
muscle, and muscle C is aln)
muscle.
Answer:
RESPUESTA:OPCION B espero te ayude
A accomplish this task, and muscle C does the opposite of A, then muscle A is a antagonist to prime mover.
What is antagonist muscle?muscles can only pull. They typically work a joint in pairs because of this. When a body part is moved, one of the pair's muscles contracts; when the body part is brought back to its starting position, the other muscle in the pair contracts.
Antagonizing pairs of muscles are those that function in this way. When two muscles are antagonistic, one contracts while the other relaxes or lengthens. The muscle that is lengthening or relaxing is referred to as the antagonist, while the muscle that is contracting is referred to as the agonist.
Therefore, A accomplish this task, and muscle C does the opposite of A, then muscle A is a antagonist to prime mover.
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A 30-year-old male demonstrated a subtle onset of the following symptoms: dull facial expression; droopy eyelids; puffiness of the face and periorbital swelling; sparse, dry hair; dry, scaly skin; evidence of intellectual impairment; lethargy; a change of personality; bradycardia (60 b/min) low range of normal; a blood pressure of 90/70 low BP; anemia low iron – cant transport O through body very well(hematocrit 27); enlarged heart (upon radiological exam); constipation, and hypothermia. Plasma concentrations of total and free T4 and T3 follow:
Radioimmunoassay (RIA) of peripheral blood indicated elevated TSH levels. A TSH stimulation test did not increase the output of thyroid hormones from the thyroid gland.
a. What endocrine organ is involved here?
b. Is this a primary or secondary disorder? Why? (Is a TSH or TRH determination necessary for your diagnosis?)
c. Describe the feedback loop involved, indicating if there is an increased or decreased TSH level.
d. List several defects that could cause these symptoms.
e. Would you expect to find a palpable goiter? Explain your answer.
f. Describe a suitable treatment for this individual.
Answer:
1. Thyroid gland is the endocrine gland that is involved here.
2. TSH stimulation test did not show an increase in the output of thyroid hormones secreted from thyroid glands which makes it a primary disorder. The determination of TSH or TRH gives an idea about hypothyroidism if it is due to feedback inhibition of the pituitary or absence of TSH hormone from the pituitary, however, Circulating levels of TRH not necessary.
3. The feedback loop involves the following:
TRH hormone secreted from the hypothalamus triggers the anterior pituitary to secret TSH that in turn triggers the relapsing of the T3 and T4 levels by the thyroid glands. If there is a low level of T3 and T4 hormones then negative feedback takes place and increases the TSH output.
4. symptoms:
Not able to uptake the iodide into the cells of the thyroid gland
Defects in the conversion of iodide to iodine
tyrosine molecule iodization
secretion of the hormones from the Tg molecules
Less TSH receptors on the gland.
5. The chronic TSH stimulation due to negative feedback may cause hypertrophy of the gland, results in goiter formation.
6. synthetic hormone therapy is known as Synthroid such asT4 (L-thyroxine).
You have isolated a new single gene mutation in zebrafish you call Casper because the mutant fish are clear (no pigments in the scales). You perform the following crosses: Cross Progeny Wild type X Casper 20 clear, 19 normal Casper X Casper 21 clear, 10 normal a. You notice that each cross produced a similar number of clear offspring but different number of normal offspring. What is going on here
Answer and Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files
What is the importance of crossing over and independent assortment?
O It allows for exact copies of the cells to be made
It allows for mitosis to occur properly
O It allows for genetic variation within species
It allows for the same gametes to be produced every time
Please help me I don't understand
Answer:
D
Explanation:
All of the other options go against actual facts and the laws of biology