Answer:
solution
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Please help!! Biology!
1. Why is it possible for the surface of a pond to freeze even though the water underneath is fluid?
2. Sugar dissolves in water, but is not an ionic compound. What does this tell you about sugar?
3. Water is used in the cells to help transport in the chemicals necessary to survive. Since cell membranes need to be able to hold in and hold out water without dissolving, what do you suspect cell membranes are made from? Why do you think this?
4. Remember "The Wicked Witch of the West" from The Wizard of Oz? She melted when doused with water. What do you think her cell membranes were made of, and why?
5. Find out why hot water freezes more quickly than cold water, and explain it here.
6. Explain why heavy water is heaver than regular water.
Answer:
Kindly check explanation section.
Explanation:
So, let us dive straight into the solution to this particular Question or problem. We are asked to explain the phenomenon in each case.
(1). Expansion occurs at the surface of a pond water when it freezes at 0°C thus creating higher density for the (liquid) water at below the iced surface.
(2). When sugar is put in water it does not ionized but only dissolved as a molecule, therefore, sugar is a weak electrolyte.
(3). Cell membranes are made of phospholipids and proteins because phospholipids as far will not want to mix with water, also movement of molecules is done by the presence of protein.
(4). The witches cell membranes does not have phospholipids which makes it to have little adhesion force and this was the prime factor in the dissolving of the witch by water. The cell membrane contain nonfatty components.
(5). The statement is true, and this is a phenomenon refer to as the Mpemba effect that is to say when one cools down hot water it looses some of it mass(reduces the quantity of water) and this is due to evaporation. Thus, as the quantity of water reduced, freezing becomes faster.
(6). Heavy water is D2O while normal water is H2O. Where D in D20 means Deuterium which is heavier than Hydrogen atoms in heavy water.
10 POINTS PLZ ANSWERRRR
Which of the following best describes non-matter?
A substance that is either a solid, liquid, or gas
Any material that has a length and a volume Anything with no mass that takes up no
space Something that takes the shape of a container
Answer:
c is the answer in my opinion .
Explanation:
Its because non matter has neither volume nor mass and no space also.
Answer:
Matter is something that takes up space so the answer is Anything that does not take up space
Explanation:
Which line points to the myelin sheath?
Answer:D
Explanation:
Explain how fossil fuels found in the Earth's crust are ultimately the result of biological processes.
Answer:
Fossil fuels are formed when organic matter such as the remains of animals and plants are buried and sequestered deep underground. The energy stored in these once-living things, as well as the process of being buried, causes the organic material to undergo a series of chemical transformations.
Answer:
Fossil fuels are formed when organic matter such as the remains of animals and plants are buried and sequestered deep underground. The energy stored in these once-living things, as well as the process of being buried, causes the organic material to undergo a series of chemical transformations.
Explanation:
why is it important to understand plant physiology in crop/plant production and productivity?in your discussion make sure that you mention related fields/areas in agriculture which specifically require a background of plant physiology
Knowledge of Seed physiology helps in understanding of different physiological and morphological changes that occur during germination. By knowing the different inputs requirement of plants (water, nutrients, sunlight) we can easily manage the plant population to get highest yield.
what are catabolic reactions
Answer:
which complex molecules are broken down to simpler components, are classified as catabolic reactions. Taken as a group of reactions within a cell or even an organism, they can be referred to as the cell's or organism's anabolism or catabolism.
Explanation:
Giving brainliest:)
Where does mRNA and tRNA take the message for DNA?
Answer:
Ribosomes
Explanation:
The information in DNA transcribed into a message in the form of mRNA. mRNA travels to the ribosomes, which are protein synthesis factories. mRNA dictates the order of tRNAs which bring amino acids to the ribosomes, forming a polypeptide chain that becomes a protein
Part of the cell cycle is shown in this simplified model. This part of the cell cycle is best described as the process that-
Answer:a
Explanation:
Answer:
It's A
Explanation:
The model represents the change in the DNA content of a cell during the cell cycle. DNA Content During the Cell Cycle 22 1 Complete Sets of DNA in Nucleus 1 Ceciclease
Answer:
Explanation:
To late?
Most chemicals necessary for life dissolve in what?
Don't answer if you don't know.
Answer:Water is considered the “universal solvent” and it is believed that life cannot exist without water because of this. Water is certainly the most abundant solvent in the body; essentially all of the body's chemical reactions occur among compounds dissolved in water.
Explanation:
Answer:
Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth. It means that wherever water goes, either through the air, the ground, or through our bodies, it takes along valuable chemicals, minerals, and nutrients.
Beta receptors:
O are cholinergic.
O bind acetylcholine.
O bind norepinephrine.
O bind the toxin muscarine.
section of DNA that provibes instuctions for specific traits
Answer:
Genes.
Explanation:
Genes are small sections of DNA within the genome that code for proteins. They contain the instructions for our individual characteristics – like eye and hair color. A gene is a small section of DNA that contains the instructions for a specific molecule, usually a protein
4. Which of the following statements BEST explains why you can hear noises
long distances at night?
A. There are fewer other noises at night.
B. Water conducts sound better at night.
C. Sound bounces off water better at night.
D. Sound waves are bent towards the cool air.
i guess its answer is option D
What does the Big Bang Theory explain about the current size of the universe?
Answer:
b
Explanation:
Answer:
The formation of the Universe.
Explanation:
A P E X
is a dragon fly a insect
Answer:
Yes
I hope this helps!
What is the keystone species
Answer:
a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically
Explanation:
Answer:a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Explanation:
The American Beaver (Castor canadensis) is one example of a keystone species in North America. In any arrangement or community, the “keystone” is considered one of the most vital parts. In a marine ecosystem, or any type of ecosystem, a keystone species is an organism that helps hold the system together.
To which groups do most of the unknown species belong?
Answer:
insects and fungi
Explanation:
Which of the following is a reason for the genetic variability from sexual reproduction?
A. The more variety there is in the gene pool, the less arrangements in the population.
B.The genes that are “dealt” to the offspring from their parents are by systematic event.
C. Offspring have the same gene combinations of either of their parents.
D. Members of a species choose mates, creating different combinations of genes.
Please help. This is due today.
Answer:
the answer is d opinion
. Write the differences between:
a. Root cap and root hairs
b. Tap root and fibrous root
C. Vegetative parts and reproductive parts
d. Terminal and axillary bud
e. Reticulate and parallel venation
f. Alternate and whorled arrangement of leaves
Explanation:
fibrous root system occupies less surface area than taproot . taproot grows vertically downwards and thus reaches deep into the soil. the fibrous roots grow horizontally in all directions and thus richest deep in the soil
why are pig/sheep hearts used to study the anatomy of the human heart?
Answer:
Pig hearts are used to study the anatomy of human hearts because they are very similar in structure, size and function to human hearts. These similarities, combined with the fact that they are much more readily available than human hearts, make them an ideal choice for research and study.
Explanation:
Google exists ykyk?
Answer:
they are very similar in structure, size and function to human hearts.
Black fur is dominant and white hair is recessive in rabbits. A white female has 2 white bunnies and 2 black bunnies. What was the genotype and phenotype of the father? You are not making baby bunnies so you need reasoning skills not a Punnett square.
Identify events that contribute to the termination of a response in the GPCR, or 7TM receptor, pathway. Select all that apply.
Answer:
Multiple choices:
1. G? dissociates from the G?? subunits.
2. The ligand dissociates from the receptor, which resumes its inactive conformation.
3. The receptor is inactivated by phosphorylation of Ser or other residues on its intracellular domain.
4. G? releases GDP and binds GTP.
5. G? hydrolyzes GTP to GDP and Pi.
Answers
The ligand dissociates from the receptor, which resumes its inactive conformation
The receptor is inactivated by phosphorylation of Ser or other residues on its intracellular domain
G? hydrolyzes GTP to GDP and Pi
Explanation:
The GPCRs known in full as G protein-coupled receptors are viewed by many as the largest group of membrane proteins that are found in human genome. They share a common architecture. The seven-transmembrane (7TM) receptors are mostly used interchangeably with the GPCRs even though there are known receptors that have seven membrane domains and do not just signal through the G proteins.
What factors should be taken into consideration when determining what raw materials to purchase? PLEASE HELP ME
Answer:
purity, value, composition, shelf life, potency, identity, and company appraisal.
Indicate which the following statements are true.
a. During glycolysis, glucose molecules are hydrolysed to yield CO2 and H2O
b. The cleavage of fructose 1,6-bisphosphate by phosphofructokinase yields two molecules of glyceraldehyde 3-phosphate.
c. When subjected to anaerobic conditions, glycolysis in mammalian cells continues and causes a buildup of pyruvate in the cytosol.
d. In the mitochondrial matrix, the pyruvate dehydrogenase complex produces CO2, acetyl-CoA and NADH.
e. Fatty acids can be transported into mitochondria and converted into acetyl-CoA, FADH2 and NADH
Answer:
The correct answer is: D
Explanation:
(a) This process does not occur during glycolysis, it occurs after glycolysis since pyruvate is generally accepted to be the last product of glycolysis
(b) Phosphofructokinase does not produce two molecules of glyceraldehyde 3-phosphate but rather produces of one molecule of glyceraldehyde 3-phosphate and dihydroxyacetone phosphate
(c) During anaerobic conditions in mammals, pyruvate is converted to lactate by the enzyme lactate dehydrogenase. It can actually cause the accumulation of lactic acid/lactate in the muscle which causes muscle fatigue but does not cause buildup of pyruvate in the cytosol.
(d) In the fate of pyruvate, the pyruvate dehydrogenase complex produces CO2, acetyl-CoA and NADH in the mitochondrial matrix. The acetyl-coA produced thereof serves as a precursor for the citric acid cycle.
Consider the three different types of stem cells. Each one's ability to differentiate into new cells is slightly different. One type can differentiate into any cell, while another can only become specific cells. Select the answer that places the three types in the correct order, from widest range of differentiation to least able to differentiate (specific). (1 point)
A. totipotent, multipotent, pluripotent
B. pluripotent, totipotent, multipotent
C. totipotent, pluripotent, multipotent
D. pluripotent, multipotent, totipotent
Answer:
C
Explanation:
Totipotent can differentiate into any cell type-Pluripotent into less, and Multipotent being the most specialized.
The types of stems cells in the correct order, from widest range of differentiation to least able to differentiate will be C. totipotent, pluripotent, multipotent.
Totipotent simply means a single, immature cell that can give rise to a new organism. Pluripotent simply means substances that can be able to develop into different stem cells.
Lastly, the multipotent stem cells are the stem cells that can self-renew as they divide and then develop into multiple specialized cell types.
Therefore, the correct option is totipotent, pluripotent, and multipotent.
Read related link on:
https://brainly.com/question/18154587
What metal can be shaped using just your hands
Answer:
gallium
Explanation:
There's a metal that's so soft that it can melt at just under 30°C (85.6°F). This is known as gallium, and after playing around with it in your hands for just a couple of seconds, it will quickly liquefy.Se
complete measure in 2/4
One of half or it could 1/2 bc 2/4 is just half of 4
Does this model represent a compound? Explain your answer.
Answer:
My Response, not the sample response in the explanation.
Explanation:
It is not a compound because it has two of the same atoms combined. You need two different atoms combined to make a compound.
I put this in the assignment and got it right.
I NEED HELP PLEASE PICTURE ABOVE