Answer:
8 g/cm is the densiry
Explanation: mass/volume
In a cross of Limnaea, the snail contributing the eggs was dextral but of unknown genotype. Both the genotype and the phenotype of the other snail are unknown. All F1 offspring exhibited dextral coiling. Ten of the F1 snails were allowed to undergo self-fertilization. One-half produced only dextrally coiled offspring, whereas the other half produced only sinistrally coiled offspring. What were the genotypes of the original parents?
Answer:
the genotypes for the original parents must have been Dd x dd
Explanation:
Maternal inheritance refers to those cases in which certain phenotypic traits depends on the maternal genotype, independently of the individual genotype. In a cross, the genotype follows the Mendelian model, but the phenotype is influenced by the maternal genotype. The phenotypic traits of generations F1, F2, F3, and so on, do not correspond to the expression of their own genes, but ti the expression of the maternal genes.
Maternal inheritance has been studied in the Lymnaea species. In gasteropods, the dextral coil is clockwise, while the sinistral coil is counter-clockwise. Dextral is expressed by the dominant allele (D), while sinistral is expressed by the recessive allele (d).
In the exposed example:
The snail contributing the eggs (females) was dextral but of unknown genotype --> D-Both the genotype and the phenotype of the other snail are unknown.All F1 offspring exhibited dextral coilingIn the F2, One-half produced only dextrally coiled offspring, whereas the other half produced only sinistrally coiled offspring.Cross)
Parental) D- x --
F1) 100% dextral (The whole progeny exhibited the dextral trait because the
individual that contribute the eggs was dextrally coiled)
F2) 50% dextral
50% sinistral
The fact that the F2 expresses 50% sinistral and 50% dextral means that one of the progenitors that contributed with the eggs (female) must have had at least one of the dominant allele D for the dextral trait, while the other female must have had the recessive genotype dd for the sinistral trait.
So the genotypes for the original parents must have been Dd x dd
1st Cross:
Parental) Dd x dd
The snail contributing the eggs Dd
the snail contributing the sperm dd
F1) 2/4 = 1/2 Dd
2/4 = 1/2 dd
100% expressing dextral coiling
2nd Cross:
Parental) Dd x Dd dd x dd
F2) 1/4 DD 100% dd
2/4 Dd 100% Sinistral coiling
1/4 dd
100% Dextral coiling
50% of the F2 exhibited dextral coiling, while the other 50% exhibited
sinistral coiling
Which property of metals allows aluminum to be flattened into thin sheets of aluminum foil?
Answer:
It is Malleability.
Answer:
Metals have the property of malleability. A roll of aluminum foil is an example of the malleability of metals.
Explanation:
"If we water a plant with acidic water, then that plant will die in a matter of hours. " --> Is this a theory, a hypothesis, or a law?
Answer:
it is a hypothesis
Explanation:
how is a scientific law different from a scientific theory?
Answer:
A theory is something that isn’t proven false or true. Weather to a law it is proven and can state the facts.
Explanation:
Which of the following describes the difference between the motion of liquid water and water vapor?
A. The particles in the liquid do not move, but the particles in a gas can move back and forth.
B. The motion of the particles is the same in both states, but they move slower in the gas state.
С. The particles in a gas can slide past each other, while the particles in a liquid are locked in place.
D. The particles in a liquid can slide past each other, while the particles in a gas are free to move in all directions.
The particles in a liquid can slide past each other, while the particles in a gas are free to move in all directions. So the correct option is D.
What is the motion of liquid particles?
Particles in liquids are dispersed randomly across the container and are relatively near to one another. Due to the closer proximity of the particles, collisions between them happen more often than in gases even if particles are moving quickly in all directions. The particles travel more quickly as the temperature rises, gaining kinetic energy along the way, leading to higher collision and diffusion rates.
The particles in a solid are arranged neatly and orderly, packing together as closely as they can. The particles are locked together too tightly to allow for movement from one location to another, yet they do vibrate in relation to where they are located within the framework. The particles gather kinetic energy and vibrate more quickly and vigorously as the temperature rises.
Therefore the correct option is D.
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In a cup of tea, what is solvent? What is solute?
Sugar is the solute and tea is the solvent and mixture of tea and sugar is solution.
What is solution, solute and solvent?An answer is a homogeneous combination of at least one solutes broke up in a dissolvable.
dissolvable: the substance wherein a solute breaks up to create a homogeneous blend
solute: the substance that breaks down in a dissolvable to create a homogeneous combination
Note that the dissolvable is the substance that is available in the best sum.
A wide range of sorts of arrangements exist. For instance, a solute can be a gas, a fluid or a strong. Solvents can likewise be gases, fluids or solids.
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Granite and basalt are:
metamorphic rocks
sedimentary rocks
igneous rocks
elemental rocks
They are igneous rocks since they are made because of volcanoes and lava.
Playing video games requires which of the following skills?
o skepticism
reasoning
problem solving
creativity
please help thanks :)
Researchers who have studied video game play have discovered a favorable correlation between gameplay and the development of problem-solving abilities, hence option C is correct.
What are video games?Video game playing has been linked to an increase in prosocial behaviors (an activity that is helpful, good, and intended to foster friendship and social acceptability) in youngsters, especially those that are social and collaborative.
In competitive video games, communication and talent are key components. Hand-eye coordination, rapid reflexes, snap decisions, and strategy are necessary for success in every competitive video game.
Therefore, playing video games requires the use of both fine and gross motor abilities as well as visual awareness, which are all hand skills, hence option C is correct.
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6. DNA contains the nitrogen bases of adenine, guanine, cytosine, and
O Peptide
O Glycerin
O Uracil
O Thymine
Answer:
The fourth nitrogen base is THYMINE.
Which of the following can be factors in both sympatric and allopatric speciation?
a. habitat differentiation.
b. geographic separation stion.
c. gene flow.
d. sexual selection.
e. polyploidy.
Answer: Option B.
Geographic separation.
Explanation:
It is geographic separation that is common to both of them because
Sympatric speciation to occur when certain populations of species isolate reproductively from the the main populations because they can not longer interbreed with each other and they inhabit the same geographical location.
Allopatric speciation occur when two populations of the same species separate from each other geographically which can be as a result of one group of population move to another geographical location.
What is the manipulable (independent) variable in an experiment in which the size of the wheels are changed and the resulting speed of the skateboard down a ramp is measured? Select one: a. The weights on the skateboard b. The height of the ramp c. The speed of the skateboard down the ramp d. The size of the skateboard wheels Clear my choice
Answer:
d. The size of the skateboard wheels
Explanation:
In an experiment, the independent variable is the variable that the experimenter manipulates or changes intentionally in order to effect a measurable response in another variable.
In this experiment, size of the wheels are changed and the resulting speed of the skateboard down a ramp is measured. This means that the independent variable is the SIZE OF THE SKATEBOARD WHEELS because it is what the experimenter changes to determine the speed of the skateboard (dependent variable).
yes ,hamburger and french fries
Answer:
and ketchup
Explanation:
Answer:
you forgot your coca cola
Explanation:
What's the difference between a producer and a consumer? Where do producers belong in a food chain?
The ________ is the particle in the nucleus with a positive charge
Answer:
Protons
Explanation: Protons are particles in the nucleus. They give off that positive charge.
What do chromosomes contain?
A. DNA molecules
B. Water molecules
C. Reproductive cells
D. Fertilized eggs
SUB
Answer:
DNA molecules
Explanation:
I did the same question and it’s right on
A P E X I hope this helps!!
Proof:
kim has a bag of yo-yos. Some of the yo-yos are red. The rest are yellow. The ratio of the number of red yo-yos to the number of yellow yo-yos is 5 : 9. If kim has a total of b yo-yos, how many more yellow yo-yos than red yo-yos are there?
Answer:
5 + 9 = total = 14
14 = total = b
5/14 of them are red 9/14 are yellow
yellow - red = 9 / 14b - 5 / 14b = 4 / 14b = 2 / 7b there are ( 2/7 ) b more yellow than red CAUSED apologiabiology .
Hope this helps ✌️
Answer:
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Which scientist is known for famously naming the cell after tiny rooms in a monastery? 1. Bill Nye 2. Robert Hooke 3. Aristotle 4. Theodor Schwann
Answer:
robert hook
Explanation:
Biology 9th grade question
Answer:
1. Protein coat
2. Nucleus (DNA + Nucleic acid)
3. Tail
4. Fibers
Which part of the electromagnetic spectrum is necessary for the sense of sight in humans?
radio waves
gamma rays
infrared light
visible light
Answer:
Which part of the electromagnetic spectrum is necessary for the sense of sight in humans?
visible light
Answer:
D. Visible Light :))
Explanation:
The amount of energy added for a chemical reaction to start is?
Answer:
Activation Energy
Explanation:
Answer:
Activation Energy
Activation Energy is the minimum amount of energy needed to start a chemical reaction.
Explanation: hope this works
PLEEEEEASSSSSSSEEEEE HELP :,,,,,,,,,|
Answer:
Explanation:
So what do u need help with
Answer: the answer i believe is C
Stroke volume is the amount of blood that leaves the left ventricle of the heart with each contraction. If a person has a stroke volume of 80 ml/beat, how many liters would that be?
Explanation:
The amount of blood that leaves the left ventricle of the heart with each contraction is called Stroke volume.
A person has a stroke volume of 80 ml/beat. It means that it is 80 milliliters per beat.
We need to find how many liters would that be.
We know that, 1 litre = 1000 milliliters
1 mL = 0.001 L
To convert 80 mL to litres, we can do it as follows :
80 mL = (80 × 0.001) LL
= 0.08 L
Hence, he stroke volume of a person is 0.08 L/beat.
What is difference between respiration and photosynthesis?
Answer:
Photosynthesis involves the use of energy from sunlight, water and carbon dioxide to produce glucose and oxygen. Cellular respiration uses glucose and oxygen to produce carbon dioxide and water.
Answer:
Respiration is a vital process carried out by the human being where he breathes oxygen gas and emits carbon dioxide .. As for the photosynthesis process, it is a process by which plants produce oxygen gas and absorb carbon dioxide.
3. Why are electrical wires in electric
circuits covered in plastic?
(1)
Answer:
Explanation:
it is rubber not plactic in a wat the eletrisaty boinces off it. it keeps eletrisaly in and not out
am i correct?
is it all of the above.?
plz tell me if i is
3. Match the body cavities that have to be opened during the listed surgical procedures listed below. Note that more than one choice may apply. (a) thoracic (b) vertebral (c) abdominopelvic (d) pericardial (e) pleural (f) cranial ___________ Liver operation ___________ Triple bypass heart surgery ___________ Stomach stapling ___________ Removal of a section of lung or lobe ___________ Manual pressure release of a brain tumor ___________ Appendix removal ___________ Gastric bypass surgery
Answer:
Match the body cavities that have to be opened during the listed surgical procedures listed below. Note that more than one choice may apply. (a) thoracic (b) vertebral (c) abdominopelvic (d) pericardial (e) pleural (f) cranial Liver operation C AND ATriple bypass heart surgery
A Stomach stapling A Removal of a section of lung or lobe A Manual pressure release of a brain tumor FAppendix removal D Gastric bypass surgery
Explanation:
The letters with the corresponding cavities in capital letters were assigned adjacent to the area to be performed.
All the named surgeries present different zones and present different planimetries.
If water molecules surround a solute particle with their oxygen ends all pointing to the solute particle, what can you conclude about the charge of the solute particle? Is it positive, negative, or neutral, and how do you know?
Answer:
It is +
Explanation:
Water molecules are polar, with partial positive charges on the hydrogens, a partial negative charge on the oxygen. So your solute would attract the opposite charge which is the Oxygen
Polar water molecules have partial positive hydrogen charges and partial negative oxygen charges. Thus, oxygen would attract your solute having positive charge.
What is polarity?Polarity is the separation of electric charge that occurs when a molecule or its chemical groups have an electric dipole moment. This results in the molecule or chemical group having one end that is positively charged and one end that is negatively charged. Because of the disparity in electronegativity between the atoms that are linked together, polar molecules are required to have one or more polar bonds.
Polar water molecules have partial charges in both the hydrogen (positive) and oxygen (negative) directions, though mostly in the hydrogen's favor.
Therefore, oxygen would be attracted to your solute if it had a positive charge.
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Who would have first made this statement while observing cork under a microscope? "The cork looks like little rooms, or cells.” Hooke Schleiden Leeuwenhoek Virchow
Answer: Hooke
Explanation:
Just trust me
Answer:
Hooke
Explanation:
Living organisms are classified into three domains and six kingdoms based on their characteristics. Which characteristics could be
used to classify organisms in the plant kingdom2 Choose ALL that apply.
A)
autotrophic
B)
eukaryotic
heterotrophic
D)
multicellular
E)
prokaryotic
Answer:
The answer would be Autotrophic, eukaryotic, and Multicellular
Explanation:
Answer:
A B AND D
Explanation:
Which of the following plant systems is involved in the process of drawing up nitrogen from the surrounding soll?
stems
leaves
O flowers
O roots
