Answer:
D. 2-methylpropane
Explanation:
The ability of a substance to dissolve in water is dependent on whether the molecules of the substance are polar or non-polar . Since water is a polar molecule, polar molecules readily dissolve in it in accordance with the principle of "like dissolves like".
Sucrose is a polar molecule since like water, it has bonds between electronegative oxygen, and electropositive hydrogen. Thus, it dissolves in water.
Potassium chloride is an ionic and hence polar molecule. It readily dissolves in water.
Acetone is a polar molecule due to the polar nature of the carbon-oxygen double bond in the molecules. Thus, it easily dissolves in water.
2-methylpropane is a non-polar molecule. The C-H bonds present in its molecules are non-polar, so it does not readily dissolve in water.
Acetic acid is a polar molecule due to carbon-hydrogen bond as well as oxygen-hydrogen bond. It readily dissolves in water and forms hydrogen bonds with water molecules.
Eclispe of the Sun
(b) Based on the diagram shown above, what can be observed on the surface of the globe?
Answer:
ANNULAR SOLAR ECLIPSE
Explanation:
BECAUSE THE SHADOW OF THE MOON DOES NOT EXACTLY REACH THE EARTH,THERE WILL STILL BE SOME LIGHT REMAINING
Suggest one safe way to observe the eclipse of the sun
Answer:
there r eclipse glasses a way to observe eclipse of sun!
hope it helps!
Explain the difference between repetition and replication. plz
Answer:
Repetition: Doing something over and over/doing something repeatedly
Replication: Duplicating something/duplicating yourself
Explanation:
I hope this helps :)
Answer:
Repetition refers to performing multiple trials throughout an experiment.
Repetition reduces mistakes and increases one’s confidence in the results.
Replication refers to the ability of a process to be repeated by another individual.
When a scientist replicates another’s experiment, the experiment should produce the same results.
Explanation:
Pelvic inflammatory disease commonly affects all of the following organs, except the:_________.
A) uterus.
B) ovaries.
C) urinary bladder.
D) fallopian tubes.
Answer:
C) urinary bladder
Explanation:
Pelvic inflammatory disease commonly affects all of the following organs, except the urinary bladder
Pelvic inflammatory disease commonly affects all of the following organs, except the urinary bladder. Option C is correct.
Pelvic inflammatory disease (PID) is an infection of the female reproductive organs. The most common cause of PID is a sexually transmitted infection (STI), such as chlamydia or gonorrhea. PID can also be caused by bacteria that normally live in the vagina.
The organs that are most commonly affected by PID are the uterus, fallopian tubes, and ovaries. The urinary bladder is not typically affected by PID.
Here are some of the symptoms of PID:
Pain in the lower abdomenFeverVaginal dischargePainful urinationBleeding between periods. Option C is correct.To know more about the Fallopian tubes, here
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Why are interactions between organisms important
A scientist observed that penguins move efficently through water.the scientist makes a that if a boat is designed with a propulsion system that moves like a penguin, then the boat will be more efficient than traditional boats
Answer:
i think it is its wont
Explanation:
What was the reason NASA almost crashed a $200 million orbiter into Mars? Group of answer choices A conversion error between two measurement systems A miscalculation on the Mars' graviational pull A launch error The power went out
Answer:
A conversion error between two measurement systems
Explanation:
During the warm days of summer in the Arctic, mosquitoes breed exponentially. When winter comes, the population falls off severely due to a limiting factor.
What is the limiting factor in this situation?
-no vegetation
-more sunlight
-excess of food
-colder temperatures
thanks in advance!!
Answer:
colder temperatures
Explanation:
Can you see pores in the walls of diatoms?
Answer:
The simple answer is yes.
Explanation:
please look at (both pictures) and answer I need this fast please answer!!
Plants and fungi were once classified in a single kingdom. Which similarity between plants and fungi led to this classification?
OOOO
their photosynthetic energy acquisition
their nonmotile, fixed body structures
their decomposer role in ecosystems
their predation on bacteria
Answer:
their photosynthetic energy acquisition
Explanation:trust me and thank me later
Why do you think invasive species are more of a problem in human altered biomes (anthromes) than they are in a biome that has not been altered by human activities?
Answer:
invasive species are a problem both in anthropogenically altered and natural environments
Explanation:
An invasive species can be defined as a non-native species introduced into a new environment which then becomes abundant. Only in the US, it is believed that there are approximately 4,000 invasive species (some examples include the feral pigs, grey squirrels, European rabbits, etc.). In general, invasive species have a negative impact on the ecosystem, especially by displacing native species and thereby altering the trophic chain. In anthropogenically altered environments (anthromes), human beings are considered to be an invasive species.
The structure below is used in agriculture. What could be a benefit of this
technology?
The answer is c hope this help you
40. When a typical male speaker phonates, his vocal folds open and close
times per second.
Select one:
a. 2
b. 10
c. 125
d. 500
e. 1,000
Answer:
The correct answer is - option C. 125.
Explanation:
Phonates are the ability to produce or articulate the sound especially with the lp of the viba\ration by his or her vocal folds. When an individual vibrates his vocal folds or speaks the sound produces which is known as the phonation.
When a typical male speaker phonates, his vocal folds open and close
125 times per second.
The correct answer is - option C. 125.
How long have people been debating the idea of evolution?
if a part of small intestines is damaged how would that impact the digestion of food
Answer:
depends on the part
Explanation:
if the part is at the end of the small i testine then most of the digestion woul have aldready taken place. However at the centre or newr the centre the digestion will be hindered it may also lead to ulcers.
what is the function of a nerve cell in a multicellular organism
Answer:to help the other cells function
Explanation:
Answer: carry and transmit signals
Explanation:
The diagram is a model of the structure of glucose. The structural formula of glucose, C6H1206, shows a ring of 5 carbon atoms and 1 oxygen atom. 4 carbons in the ring are each bonded to an -H and an -OH group in addition to 2 neighboring atoms in the ring. The fifth carbon is bonded to a CH2OH group. What structural feature does glucose share with larger carbohydrates? A. a ratio of 1 carbon atom to 2 hydrogen atoms to 1 oxygen atom B. the presence of double covalent bonds between carbon atoms C. strong bonds between carbon atoms that cannot be broken D. ionic bonds between carbon atoms and oxygen atoms
Answer:
The correct answer is : A. a ratio of 1 carbon atom to 2 hydrogen atoms to 1 oxygen atom
Explanation:
Carbohydrates are the primary and major component of diet, these molecules give vitality to the body, predominantly by means of glucose, a fundamental sugar, which is an part of the starch and a fixing in different staple nourishment diet choices.
the significant chemical formula of carbohydrates is (CH2O)n. It can be exhibited or express by the proportion of the carbon to hydrogen to oxygen which is 1: 2: 1 in the particles of starches. Starches are additionally arranged into three sub-sorts, that is, monosaccharides, disaccharides, and polysaccharides. The monosaccharides are the basic sugars, for instance, glucose.
Thus, the correct answer is : A. a ratio of 1 carbon atom to 2 hydrogen atoms to 1 oxygen atom
Which of the following are final destinations of proteins directed to the secretory pathway? ▼endoplasmic reticulum ▼mitochondria ▼the plasma membrane ▼the outside of the cell▼ the nucleus ▼the golgi apparatus ▼lysosomes A. TRUE B. FALSE
Answer:
False, the final destination is the outside of the cell
Explanation:
The secretory pathway moves proteins to the cell membrane, where they are released to the extracellular medium. In this pathway, the proteins enter into the membrane of the rough Endoplasmic Reticulum (ER) in a cotranslationally way (i.e., during their synthesis in ribosomes). This pathway can be summarized by the following transporter activities: Endoplasmic Reticulum >> Golgi apparatus >> secretory vesicles (such as lysosomes) >> cell membrane, where proteins are finally released by exocytosis.
Which of the following statements about eukaryotes is not true?A) They contain organelles like mitochondria, chloroplasts, the endoplasmic reticulum and the nucleus.B) They are usually 10 to 100 microns in diameter.C) They can be either unicellular or multicellular.D) They are also called archaea.E) All of the above are true of eukaryotes.
Answer: Option B, D and E.
They are usually 10 to 100 microns in diameter.
They are also called archaea.
All of the above are true of eukaryotes.
Explanation:
Eukaryotes are organisms that have nucleus and it is surrounded by nuclear envelope and membrane bound organelles in the cell cytoplasm.
They can either be unicellular or multicellular compared to prokaryotes that are Majorly unicellular.
They are not usually 10 to 100 microns because most eukaryotes are multicellular organisms and they are bigger in sizes visible to the eyes like fish, goat,humans.
Eukaryotes are not usually archaea because archaea is are Majorly prokaryotic organisms that are unicellular and have no nucleus.
A solution with pH of 7 is ??
Answer:
neutral solution
Explanation:
This pH value of 7 is important because it indicates a neutral solution. All other substances are compared to this neutral point. Any solution that has a pH of less than 7 is considered acidic, and anything above a pH of 7 is basic
Drag each of the following organs to the appropriate organ system. Labels can be used more than once if the organ is a major part of more than one system.
1. Brain
2. Stomach
3. Trachea
4. Pancreas
5. Blood vessels
6. Lungs
7. Ureter
8. Bones
9. Spleen
10. Thyroid gland
11. Ovary
12. Small intestine
13. Muscles
14. Pituitary gland
15. Kidney
16. Skin
17. Spinal cord
18. Heart
A. Endocrine
B. Integumentary
C. Skeletal
D. Muscular
E. Nervous
F. Cardiovascular
G. Lymphatic
H. Digestive
I. Respiratory
J. Urinary
K. Reproductive
Answer:
Nervous-brain as the components of the central nervous system,together with the spinal cord.
Digestive-Stomach as the components of the upper digestive or alimentary canal.It is for temporary storage and digestion of foods.
Small intestine where final digestion and absorption takes place
Respiratory-Lungs.-paired in mammals is for exchange of gases.
-Trachea as part of the upper respiratory system,conducts airways to the lungs
Reproductive-Ovary female reproductive organ for ova production
Urinary-Ureter for conducting urine to the bladder from the kidney to penis and orifice in females to the exterior.
Cardiovascular( the heart and the blood vessels)- heart the pumping organ into the blood vessels.
Endocrine-Thyroid gland for secretions of thyroid hormones -T3 and T4.
Pancreas for insulin and glucagon productions,and helps in digestion,
Integumentary-Skin,for protection of the body.
Lymphatic-Spleen.This forms the lymphatic system for formation of un reabsorbed tissue fluids the lymph.
Skeletal-Bones for support and rigidity of the body,by attaching to the bones,
Muscular system-muscles for stability of the body in mammals.
Explanation:
I need help with this question
Answer:
Carboniferous period.
Explanation:
why might a newborn baby bleed more from a cut than a baby who is 1 month old.
Answer:
A newborn baby bleed more from a cut than a baby who is 1 month old because they are more delicate and have more of a thin skin compared to a 1 month old.
Hope it helps.
Experiment 1: A scientist is interested in whether increasing the temperature when germinating seeds will decrease the amount of time it takes for germination. Pepper seeds in two equivalent germination rooms will be included in the study. One room is maintained at 85 degrees, the other room is left at the usual temperature of 75 degrees.
- What is the independent variable, dependent variable, and control? *choices are 75 degree room, temperature, and germination rate
Answer:
3
Explanation:
What is a unique characteristic of stem cells that makes them important
Sirius A is 8.6 light-years from Earth. What is this distance in Kilometers?
Answer: 81,362,880,000,000 kilometres
Explanation:
A Light year refers to the distance that light travels in a year.
Light travels at a rate of 300,000 km/s.
This means that in a year it travels;
= 300,000 * 60 seconds * 60 minutes * 24 hours * 365 days
= 9,460,800,000,000 km in a year
Sirius A is therefore;
= 9,460,800,000,000 * 8.6
= 81,362,880,000,000 kilometres from Earth.
Questions:
1. How is a cell membrane like the plastic bag in the experiment?
2. Define diffusion.
3. List two reasons why molecules will not diffuse into cells.
Explanation:
1. cell membranes are partialy permeable, only allowing passage to some certain molecules.
2. diffusion is the movement of molecules across partially permeable membrane down concentration gradient.
3. the molecules are too big to pass through partially permeable membrane. the concentration of the molecule might be higher in the cell than in the solution/surroundings.
why might the nucleus be referred to as the brain of the cell
Answer:
The nucleus is called the "brain" of the cell because it holds the information needed to conduct most of the cell's functions. Other molecules make proteins from that information on a regular basis - each moment of our lives
Hope this helps!
How are cells, tissues, organ, and systems related?
Answer: Cells
Explanation:
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs.