Answer:
The importance of fossils to the rock record is that fossils provide evidence that organisms from the past are not the same as those found today, and demonstrate a progression of evolution
Explanation:
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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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
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
Termites are unable to digest some plant materials (fiber). Termite stomachs contain bacteria that digest the fiber in wood for the termites. In turn, the bacteria are provided with a hospitable environment to carry out their life processes.
Answer: The question is not complete, the completed part is which type of relationship is it.
MUTUALISM
Explanation:
MUTUALISM is a symbiotic relationship that exist between organisms in which both the organism benefit from the relationship and there is not loss.
It is MUTUALISM because, the termite benefited from the relationship because the bacteria help it to digest and break cellulose for easy absorption and the bacteria benefited by obtaining accomodation and feeding on the left over of termites.
The two organisms actually benefited from each other.
Answer:
The question is not complete, the completed part is which type of relationship is it.
MUTUALISM
Explanation:
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
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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yes ,hamburger and french fries
Answer:
and ketchup
Explanation:
Answer:
you forgot your coca cola
Explanation:
Explain why a plant cell needs a cell wall but an animal cell does not. Feel free to add an image to support your explanation.
The hormone oxytocin aids the birth process by stimulating:__________
Answer:
The hormone oxytocin aids the birth process by stimulating: uterine wall contractions.
Explanation:
Oxytocin is a hormone that is released naturally in the body of women and that intervenes in certain physiological processes, activating behaviors at a mechanical level in specific organs such as the uterus and the breasts. In the case of the uterus, oxytocin stimulates and maintains the contraction of the smooth muscle of the uterus during labor and delivery, that is, it is responsible for the existence of contractions, which occur during intercourse, due to the distension of the uterus that occurs produced during labor.
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.
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SKILL:
mole
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"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:
Which of the following are NOT examples of matter (CHOOSE ALL THAT APPLY)?
a table
light
air
a flower
heat
a virus
Answer:
Hey There!
Your answers are:
LIGHTHEATExplanation:
Matter is ANYTHING that takes up space, has a mass and has a volume...regardless if it is minimal...
Heat and Light DOES NOT have any volume, mass or take up space therefore they aren't examples of matter!
I HOPE THIS HELPS WITH YOUR WORK!
:D
HCl is added to a solution containing barium and calcium ions. If a precipitate is formed, what is it? A. No precipitate is formed B. Barium chloride
Answer:
A. No precipitate is formed.
Explanation:
Hello,
In this case, considering that both calcium chloride and barium chloride are CaCl₂ and BaCl₂ respectively, due to their high polarity by cause of the ionic bond they have between calcium and chlorine and barium and chlorine we say they are highly soluble in water, therefore, A. No precipitate is formed.
Best regards.
If a claim is mainly supported by anecdotal evidence (stories or claims by people), It is
likely
Answer:
Biased.
Explanation:
Anecdotal evidence is described as the evidence that is based entirely upon an individual's personal experiences or observations.
As per the question, a claim based on such evidence is most likely to be biased as anecdotal evidence is based on a limited selection of examples that either support or refute the claim but not supported by any scientific or statistical analysis. Due to this undue bias, anecdotal evidence is not considered reliable as it displays the personal opinion, feeling, or experience of an individual. Thus, it may be used to negate the general statements but not to support r substantiate a claim or argument.
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 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:
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:
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 plant systems is involved in the process of drawing up nitrogen from the surrounding soll?
stems
leaves
O flowers
O roots
What's the difference between a producer and a consumer? Where do producers belong in a food chain?
PLEEEEEASSSSSSSEEEEE HELP :,,,,,,,,,|
Answer:
Explanation:
So what do u need help with
Answer: the answer i believe is C
What are the four major categories of micromolecules? Describe the basic structures and the primary functions of each.
Answer:
There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids); each is an important cell component and performs a wide array of functions.
Explanation:
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.
Why do classification systems change over time?
Scientists find new evidence in their studies,
Scientists use old methods of classification.
Scientists repeat experiments and find no changes.
Scientists find similar evidence to previous work.
Answer:
Classification system changes because the scientists find new evidence in their studies.
Explanation: The world is always changing and growing and dying as well as developing, so over time things change. For example, as you grow up do you stay the same? No, you notice the physical changes happening, well thats sort of like how the earth and its ways are always changing as well.
Classification systems change over time - Scientists find new evidence in their studies
Millions of plants, animals, and microorganisms are present on the earth. They have been identified by scientists, however, There are many new species are still being discovered around the world.
Scientists find new evidence and species that may have to change classification systems in order to manage new systematics and taxa or ranks.to classify these newly discovered species, with new characters, new systems of classification have to be devised every now and then.Thus, Classification systems change over time - Scientists find new evidence in their studies
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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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Two closely-related insect species are being discovered. Scientist are focusing on how long it takes each to develop limb buds following fertilization. What evidence of evil outlook is this an example of
o Explanation:
o gecromo e oo rat
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:
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:
