Answer:
Compound light microscope
Explanation:
This is the ideal microscope because it requires the passage of harmless beam of light through the specimen.Since the pond contain living creatures this is best to use.
C and D both require the transmission of beam of electrons through a sample. D depends on the reflection of the electron after scanning the specimen surfaces and sent this to the lenses of the observer.(C)involved the passing of the beam of electrons through the specimen the interaction of the electrons with the atoms in the specimen(,therefore in both cases these specimens can not be wet and living.
The specimen should be dry in both cases and therefore non -living ,because the chamber for the specimen must be a vacuum,and living organism can not survive in the vacuum. Thus pond water can not be used as specimen because the specimen in the water but me be living.
What is cleisthenes in 2000 BCE - Ancient Greece
Answer:
Cleisthenes Greek was an ancient Athenian lawgiver credited with reforming the constitution of ancient Athens and setting it on a democratic footing in 508 BC.
Explanation:i dont have one
Atoms connected by covalent bonds share a ionic compounds. b pairs of electrons. c carbon and oxygen. d hydrogen ions.
Answer:
B
Explanation:
Atoms connected by covalent bonds share electrons. Therefore, the correct answer is option B.
Extremely high ionization energies prevent some elements from accepting electrons, and extremely low electron affinities prevent some elements from accepting them. These elements' atoms frequently share their electrons with those of other elements or with other atoms of the same element in order for both atoms to achieve stability by forming an octet configuration in their respective valence shells. Covalent bonds are those associations that involve sharing electron pairs between entities of different or similar kinds.
Therefore, a pair of electrons is shared between atoms connected by a covalent bond. The correct answer is option b i.e. pairs of electrons.
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Which ties to the Calvin cycle because it gives photosynthesis a pathway of light reactions and dark reactions.
Answer:
What is the link between the light reactions and the Calvin cycle during photosynthesis?
Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH. The Calvin cycle, which takes place in the stroma, uses energy derived from these compounds to make GA3P from CO2
Who is the first discovered plants were made of cells?
Answer: PLEASE MARK ME AS BRAINLIST
Explanation:
The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name. However what Hooke actually saw was the dead cell walls of plant cells (cork) as it appeared under the microscope.
the German botanist Schleiden proposed that all plants are made up of plant cells. Thank you.
Answer:
Robert Hooke - 1965
Explanation:
main source of quick energy
A Polysaccharide
B monosaccharide
C disaccharide
D Carbohydrate
Answer:
A. Polysaccharide
Answer:
d carbohyrate
Explanation:
Which of the following does NOT describe a protein function? A. Enzyme B. Short-term energy C. Antibody D. Endorphin
Answer:
B. Short-term energy
Explanation:
A, C, and D are all protein functions.
B is characteristic of carbohydrates.
Proteins are the macromolecules that act as enzymes, antibodies, and endorphins. It does not act as short-term energy. Thus, option B has been correct.
What are proteins?Proteins are polymers that are large molecules and are essential for several bodily activities, including immune reactions, hormone synthesis, growth, development, energy, and enzyme activities.
Enzymes are made of proteins that speed the biochemical reactions, antibodies are made of proteins that are immunoglobulins and act as a defense for the body. Endorphins are the hormones that are synthesized in stress and painful conditions.
Proteins just do not provide short-term energy but provide energy that can suffice for a longer period of time so that it can perform the various functions and activities in the cell.
Therefore, option B. proteins are not short-term energy.
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How is DNA expression regulated in individual cells?
Answer:
Gene regulation can occur at any point during gene expression, but most commonly occurs at the level of transcription (when the information in a gene's DNA is transferred to mRNA). Signals from the environment or from other cells activate proteins called transcription factors.
Explanation:
Gene regulation can take place at any stage of gene expression, although it often happens during transcription when the data from a gene's DNA is converted to mRNA.
What is gene regulation?Proteins known as transcription factors are activated by signals from the environment or from other cells.
Limiting the amount of mRNA that is generated from a certain gene regulates transcription.
Eukaryotic gene expression is regulated by the nucleus-based mechanisms of transcription and RNA processing and the cytoplasm-based activities of protein translation.
Therefore, the translation of mRNA into proteins is regulated by post-transcriptional processes, which constitute the second level of regulation.
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What element is always present in a nucleic acid but is never present in a carbohydrate or amino acid
Carbon Sulfur
Proteins Always Sometimes
Carbohydrates Always Never
Nucleic Acids Always Never
Lipids Always Never
5(x + 6) - 2x = 3(x + 10)
Answer:
5(x + 6) - 2x = 3(x + 10)
or 5x + 30 -2x = 3x + 30
0r 0=0
Explanation:
Answer:
x=0
Explanation:
5x+30-2x=3x+30
combine like terms subtract 3x from both sides and 30 from both sides
5x-2x-3x=30-30
-6x=0
divide both sides by -6
x=0
Describe the functions of proteins in cell membrane.
Answer:
Membrane proteins can function as enzymes to speed up chemical reactions, act as receptors for specific molecules, or transport materials across the cell membrane. Carbohydrates, or sugars, are sometimes found attached to proteins or lipids on the outside of a cell membrane.
Explain in your own words an atom and an element.
Answer:
Explain in your own words an atom and an element.
Explanation:
A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing just one proton and one electron.
8
During cellular respiration, the bonds of food molecules are broken, so energy can be released to fuel other cellular processes. In
order for this to occur, which of the following statements must be true?
tho honds of the fond molecules.
Answer:
B.) New compounds with lower-energy bonds must be formed when the high-energy bonds in food molecules are broken.
Explanation:
I hope it helped
The measurement of the pressure gradient of two solutions that are separated by a selectively permeable membrane is called...
A. Osmolarity
B. Equilibrium
C. Homeostasis
D. Tonicty
The osmotic gradient, which is the concentration difference between two solutions on either side of a semipermeable membrane, is used to determine a particle's concentration in a solution. Thus, Option A is correct.
What is osmolarity of a solution?Osmolarity, which is determined by the number of osmosis of a solute per liter of solution, is a gauge of solute concentration.
According to their relative osmolarity, solutions can be broadly characterized as hypertonic, hypotonic, or isotonic.
Osmolarity is important because cells cannot survive if their environment's osmolarity is significantly different from their own.
From a lower osmolarity to a greater osmolarity, water flows over a membrane. It switches from the diluted to the concentrated side, to put it another way.
Therefore, osmolarity measurement of the pressure gradient of two solutions that are separated by a selectively permeable membrane.
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Blood is an example of which type of mixture?
Answer:
Liquid Homogeneous Mixtures
Explanation: In the human body, blood plasma is an example of a homogeneous mixture. The colorless fluid holds blood cells in suspension.
... Hope this will help....
What is most likely to happen if an individual restricts consumption of dietary fat to very low levels?
A. loss of hemoglobin from red blood cells
B. loos of insulation around vital organs
C. development of atherosclerosis
D. development of scurvy
Answer:
The answer is B
Explanation:
Loss of insulation around vital organs
The major organic macromolecules are include all of the following EXCEPT- >
a. carbohydrates
b. water
c. proteins
d. lipids
e. nucleic acids
Answer:
water
Explanation:
all are except water
Answer:
water
Explanation:
Name two social changes which take place during adolescence.
Social changes in adolescence
Young people are busy working out who they are and where they fit in the world. You might notice your child trying out new things like clothing styles, music, art or friendship groups. Friends, family, media, culture and more shape your child's choices in these years.
Social changes in adolescence. Young people are busy working out who they are and where they fit in the world.
What is Adolescence?Adolescence, which lasts from ages 13 to 19, is the period between childhood and adulthood.
Adolescence's physical and psychological changes frequently begin earlier, between the ages of 9 and 12, during the preteen or "tween" years.
Teenage years can be a time of confusion and discovery. As adolescents develop their sense of self, they may have to make challenging decisions regarding their academics, friendships, sexuality, gender identity, use of drugs and alcohol, and independence.
Therefore, Social changes in adolescence. Young people are busy working out who they are and where they fit in the world.
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What is homeostasis? What is an example of homeostasis?
Answer: the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
Explanation: one of the most familiar examples of homeostasis Body temperature control in humans
plz mark brianliest
Answer:
Homeostasis is the ability of the body to maintain a stable internal environment despite changes in external conditions
I am terribly sorry that this is only the definition of homeostatis... I can't think about much science right now, it is very late where I am at the moment. Good night, and have a great scientific life.
What should Smithers conclusion be
Answer:
sry I'm not getting the answer fr ur question
Is unicellular eukaryotic or prokaryotic
Answer:
It's Eukaryotic
Explanation:
The gel-like substance that is outside the nucleus and holds all of the organelles is known as
When adding more sucrose to a 0.7 M sucrose solution, why does it not dissolve as readily as it did at a lower molarity? a) the ions in the solution interact with the sugar and that interferes with its solubility b) the solubility of the solute depends on wether the solute has hydroxyl functional groups or not c) the solute molecules adhere to the polar regions of the water molecules so there is no room for more sucrose molecules d) hydrogen bonds in the water molecules change the electrical charge of the sugar molecule, which prevents it from dissolving further in the water
Answer:
The correct answer is option c.he solute molecules adhere to the polar regions of the water molecules so there is no room for more sucrose molecules
Explanation:
The Solution contains a solute (sucrose for this situation) and dissolvable (water for this situation). A saturation or unsaturation of a solution relying upon whether it can even now dissolve a solute or not.
As indicated by this inquiry, the sucrose solution is saturated as the 0.7 M sucrose arrangement doesn't disintegrate the sucrose (solute) anymore. The immersion of the sucrose arrangement happens in light of the fact that the measure of solutes is likening the number of solvents in the solution. The solubility of a particular solution relies on saturation.
How can I read this correctly
A human-centered worldview states that humans, as the owners of Earth, can treat resources as
they see fit
true
false
Early scientists believed the earth was around 6,000 years old. What do scientists
currently believe?
Answer:
they now also believe that earth is 6000 years old
Explanation:
classify each of the following as a stimulus or a response
a._____ the recess bell ringing in an elementary school
b._____ your mouth watering at the sight of food on a plate
c._____ a sudden drop in air temperature
d._____ a flu virus entering your body
e._____ getting “butterflies” in your stomach before giving a speech
Answer:
A- Stimulus
B- response
C- Stimulus
D- Stimulus
E- Response
Explanation:
Stimuli are what cause responses.
Which best defines homeostasis? modifying the external environment maintaining a stable internal environment controlling what enters and exits the cell movement of materials into the cell
Answer:
B. maintaining a stable internal environment
Explanation:
Took the test :)
Answer: yes its B
Explanation:
Which equation has water as a reactant in chemical reaction?
Answer:
Na + H2O NaOH + H2 is the ans
Sample Response: When there is less rainfall, land,
which is part of the geosphere, becomes dry. When there
is not enough water, plants will not get the nutrients they
need from the soil and animals will not get enough water,
and they will die. Both plants and animals are part of the
biosphere. Less precipitation would also mean less water
in lakes and groundwater, parts of the hydrosphere, and
less evaporation. The atmosphere may also be affected
due to less water vapor.
Which ideas did you include in your answer? Check all
that apply.
Droughts can cause the geosphere to be very dry.
Droughts can affect the survival of organisms in the
biosphe.
Droughts can affect the amount of water in the
hydrosphere.
Droughts can affect the amount of water vapor in the
atmosphere.
Answer: there is no correct answer to this question i just took the test and the answer is whatever you want to answer
Explanation:
just took it on edg 2020
When there is less or no rain than expected it will lead to draughts.
Draughts:When there is less rainfall all the parts and organisms of the earth get affected. Water is an essential component of life. Less rainfall leads to the scarcity of water on the earth.
Farmers will not get enough amount of water for farming, groundwater levels also get affected. Plant and animal life also gets affected, and this affects the survival of organisms. Draughts can also affect the amount of water in the hydrosphere.
Food, fruits, and vegetables also get reduced because of less amount of rainfall. Therefore good rain is essential for the lives of the plants and animals. This is important for the survival and the good life of the organism.
Therefore, When there is less or no rain than expected it will lead to draughts.
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Can someone please help me?