Answer:
Explanation:
chloroplasts
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
If you cut a tree trunk into pieces, the resulting pieces and dust add up to the same mass as the original trunk. This is a demonstration of
Answer:
The law of conservation of mass
Explanation:
The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.
Explain how to focus a microscope using the high power lens. Include any safety issues you need to be aware Answer
Answer:
Include any safety issues you need to be aware of. Answer: To focus a microscope using the high-power lens you have to use the focus adjustment knob but be careful because if you crank down too hard, you can damage the microscope and the slide.
Explanation:
Look through the eyepiece (1) and move the focus knob until the image comes into focus. Adjust the condenser (7) and light intensity for the greatest amount of light. Move the microscope slide around until the sample is in the centre of the field of view (what you see).You must be very careful when using the high power lenses so you do not jam them into the slide. Ocular Lens - The ocular lens, or eyepiece, magnifies the image.
How does the ratio of H to O atoms in starch compare with the ratio in double sugars?
Answer:
The answer is "2:1".
Explanation:
The formula of the Starch is = [tex](C_6H_{10}O_5)n[/tex]
The ratio of Hydrogen (H) and oxygen (O) is= 2:1.
The ratio of Hydrogen (H) and oxygen (O) in all carbohydrates (starch and sugar included) are 2:1.
Nucleic Acids are 1 of the 4 types of Biomolecules - - the others being Proteins, Carbohydrates and Lipids.
True
False
Answer:
True.
Explanation:
The four major types of biomolecules are carbohydrates, lipids, nucleic acids, and proteins. Portion of polynucleotide chain of deoxyribonucleic acid (DNA).
state 4 ways by which through which a soil is depleted
Answer:
Explanation:
Leaching – Plant nutrients are lost beyond the reach of plant roots. Usually caused by excessive rainfall washing nutrients deep down into sub-soil beyond new roots reach.
Soil erosion – Top soil is lost by the agent of erosion e.g. wind, water.
Monocropping – This utilizes only specific nutrients from a particular zone making it exhausted. -It also causes accumulation of certain pests and diseases.
Continuous cropping –This continuously exhaust the fertility of land unless the the land if fallowed.
Change of soil PH -Use of either acidic or basic fertilizers affect soil pH and Consequently the presence of micro-organisms hence soil fertility affected.
Burning of vegetations –Destroys organic matter and soil structure. Nutrients are lost and soil exposed to erosion.
Accumulation of salts – Common in waterlogged areas and semi-arid areas in which poor drainage causes evaporation during the dry periods, making the soil saline.
HELPPP PLSSSS I NEED SOON
Answer:
j
Explanation:
Nhen you are finished with the experiment, complete the following data analysis and submit your answe 1. Determine the volume of the box and the block. 2. Determine the ratio of the block to the box: volume of block (L)(W)(H) volume of bosc (DWH) 1. Multiply this number by 100 to turn it into a percent. 2. Complete this statement The volume of the block is percent of the volume of the box. 3. Determine the ratio of the number of hits to the number of shots: number of bits 100 shots 1. Multiply this number by 100 to turn it into a percent. 2. Complete this statement: The block was hit percent of the time. 4. Compare the results of step 2 to the results of step 3. Are the percentages similar? 5. Write a conclusion discussing the following items: 1. Based on your findings, do you think Rutherford's hypothesis was reasonable? 2. Restate Rutherford's hypothesis and describe how you tested it. 3. State whether your results support the hypothesis. If they do not, can you suggest some error in exp procedure (other than general human error) that might explain it? 4. Finally, explain how this experiment confirms the nuclear model of the atom and the idea that most of empty space.
Answer:
These are just the answer key. You will have to fill in the lower half of the questions yourself. I did not consider 32% and 1.6% approximately the same but the answer key did.
Hope this helps:)
Explanation:
The box’s measurements are: length = 50 cm, width = 25 cm, and height = 25 cm. The measurements of the block are: length = 10 cm, width = 10 cm, and height is 5 cm.
Out of 100 marble drops or shots, the marble hit the block 32 times.
volume of the box = 50 × 25 × 25 = 31250 cm 3
volume of the block = 10 × 10 × 5 = 500 cm 3
Ratio = 500/31250 = 0.016 × 100 = 1.6%
The volume of the block is 1.6% of the volume of the box
Ratio = 32 hits/100 shots = 0.32 × 100 = 32%
The block was hit 32% of the time.
Percentages will be similar and both be small percentages
Answers will vary.
according to_ theroy life is orginated as lifeless matter
options
a)biogenesis b) abiogenesis
c)cosmie. d)special creation
B) abiogenesis
Abiogenesis is one of the modern evolutionary theories on how life originated. It used to refer to the now-discredited hypothesis of spontaneous generation. It was once believed that complex living organisms such as mice, maggots, etc. could arise spontaneously from nonliving matter.
Which of these is the function of the large central vacuole?
Reproduction of the cell
Production of ATP
storage
Energy production
Are Viruses Alive? Venn Diagram
Directions: Use the word bank provided to complete the Venn diagram below. Then complete the exercise
below.
Word Bank
Capsid
Cell Membrane
Nucleus
Evolve
RNA
Cell organelles
Envelope
Heredity
Homeostasis
DNA
Ribosomes
Develop
Cell
Virus
Answer:
Viruses are not alive
Explanation:
Viruses are acellular structures capable of performing some biological functions.
What are viruses?Viruses are parasitic structures made of an outer protein capsid and genetic material which are able to replicate in a living cell and thus cause infection in the cell.
Viruses hijack the replicative machinery of the host to produce copies of its own genetic material. A single infected cell is capable of producing thousands of viruses.
The virus only injects the nucleic acid inside the target cell, the envelope and capsid are left outside. The hijacked genetic machinery of the host produces further copies of the nucleic acid, capsid and envelope.
These structures are assembled to give rise to new viruses.
If a large number of viruses are synthesized rapidly, it results in cell lysis. This type of infection is called the lytic cycle.
If the virus genome incorporates with the host genome, it is present there silently and being replicated. Upon receiving an activation signal lytic cycle is activated. It is called the lysogenic cycle
Therefore, viruses are acellular structures capable of performing some biological functions.
Read more about viruses, here
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describe the role of soil organisms in soil structure and development
Answer:
One of the most important roles of soil organisms is breaking up the complex substances in decaying plants and animals so that they can be used again by living plants. This involves soil organisms as catalysts in a number of natural cycles, among the most prominent being the carbon, nitrogen, and sulfur cycles.
Explanation:
A chemical bond formed when two atoms share electrons is called a(n) _____ bond
(A)polyatomic
(B)crystal
(C)covalent
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Which of the following is an example of maintaining homeostasis?
Answer:
Explanation:
Humans' internal body temperature is a great example of homeostasis. ... That's an example of homeostasis being maintained. When you get shivery in the cold, or sweat in the summer, that's your body trying to maintain homeostasis. Glucose is the most basic form of sugar, and the only type the body can use directly.
Answer:
c
Explanation:
it saws that warming up and cooling down is a part of homeostasis.
The main components of the plasma membrane contain hydrophobic and hydrophilic regions that give the membrane selective permeability. Which of the following is the
main component that creates the hydrophobic and hydrophilic regions? (3 points)
a. Cholesterol molecules creating membrane fluidity
b. Carbohydrates for cell recognition
c. Glycolipids containing hydrophobic lipid portion
d. Phospholipids containing hydrophobic fatty acids tails
Answer:
The main components that creates the hydrophobic and hydrophilic regions of the plasma membrane are phospholipids containing hydrophobic fatty acids tails.
Explanation:
Phospholipids are the main component of the cell membrane —lipid bilayer— and responsible for its selective permeability. Each phospholipid is composed of one glycerol molecule, which forms the head, and two fatty acid tails, plus one phosphate molecule.
In the lipid bilayer, the phospholipid heads are oriented towards the surface, while the tails are located inside, allowing interaction with both polar and apolar molecules.
The hydrophilic regions of the membranes are in contact with the liquids of the extracellular and intracellular spaces, while the hydrophobic region is inside the membrane, limiting the passage of polar molecules or ions.
The other options are not correct because:
a. Cholesterol molecules are part of the membrane, but are not responsible for the hydrophobic and hydrophilic regions.
b. Carbohydrates for cell recognition do not determine membrane permeability.
c. Glycolipids, like integral proteins, are part of the membrane, but do not determine the polarity of the regions.
What conditions would you look for
if you were looking for life on moons or other
planets besides Earth?
!!EASY ANSWER PLEASE!!
Answer:
You would look for water air living life forms and suitable places to live on the planet you would also look for oxygen so living life forms can breath, and lastly see if you can grow food or if food can stay on that planet.
Explanation:
This is how a life forms stays alive
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The region of the earth where ecosystems interact
How do I write a hypothesis in "If...then..." format?
Research question: "What vegetation type supports the highest abundance of life"
My answer is the savannah/woodland
Answer:
If I were you, I would make my hypothesis something like:
"If the vegetation type is a savannah/woodland, then it will support the highest abundance of life."
Explanation:
I know that hypothesis can be tricky to write at first, but if you turn the research question into a sentence, then you can write your hypothesis. Best of luck with your experiment.
Hope this helps! Feel free to give me Brainliest if you feel this helped. :)
What phrase best describes the process shown
it best describes about this is what it is called and where it should go next
Which of the following are chemical reactions? Check all that apply
A. Pouring chocolate sauce into milk to make chocolate milk
B. Making caramel sauce
C. Getting a suntan
D. Mixing oil and vinegar to make salad dressing
Answer:
b and c
Explanation:
In b you'll be mixing and heating up the sauce creating a new compound from older components and in c, the ultraviolet lights will change your skin cells.
Answer:
B AND C
Explanation:
Explain 3 ways of checking soil depletion
The basic building block of all matter and the smallest unit of matter is
Atom b. Matter c. atomic number d. molecule
a.
How is the current trend of climate change different from previous cycles?
A. The temperatures are dropping more quickly.
B. The temperatures are changing more slowly.
C. The temperatures are much higher.
D. The temperatures are not changing as much
Here you go :)
The speed of the current climate change is faster than most of the past events, making it more difficult for human societies and the natural world to adapt. Climate change = more heat
So, the answer is C
________
Answered by James
describe differences in water and oil. use the following terms in your description in the correct context : polar, nonpolar, hydrophilic, and hydrophobic
I’m not sure what the answer is.
Answer:
The answer is A
Explanation:
Becky is experiencing chronic pain from a medical condition that cannot be treated. In order to minimize the long-term emotional response to her pain, she would choose a modification of her a. Parietal cortex. b. Prefrontal cortex. c. Primary somatosensory cortex. d. Dorsal lateral thalamus. e. Posterior cingulate cortex
Answer:
b. Prefrontal cortex.
Explanation:
The prefrontal cortex is the cerebral cortex that covers the frontal lobe in the brain. The prefrontal cortex plays important roles in pain processing, as well as in pain modulation. In addition, this brain area is connected to other brain regions including the hippocampus, thalamus, amygdala, and further areas of the cerebral neocortex. It has been shown that changes in gene expression patterns, glial cells, neurotransmitters and inflammatory processes are triggered in the prefrontal cortex during both acute and chronic pain, and these alterations are able to modify its functioning, structure, and connectivity.
Someone can please describe what happens to the valence electrons when two elements form an ionic compound?
Answer:
ionic bond / electrovalent bond.
electrostatic attractions between oppositely charged ions .
eg: NaCl.
Na - 2, 8 ,1 Na^+ 2, 8
Cl - 2, 8 ,7 Cl^- 2 , 8, 8
Na^+ + Cl^- gives Na^+Cl^-
sodium loses one electron to attain nearest noble gas configuration.
Chlorine gain one electron from sodium to attain nearest noble gas configuration .
Coffee is an example of a
Answer:
Hey mate.....
Explanation:
Coffee can be an example of Beverage.....
hope it helps,
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The coffee, or rather the coffee beans, are crop that can be considered as a luxury crop. The reason why it can be considered as luxury crop is that it is not a crop that is needed for food, or satisfying the basic needs of the humans.
what enzymes are produced by small intestine
PLEASE HURRY
Answer:chymotrypsin
Explanation:it gets secreted
Aquatic organisms are able to survive when the temperature decreases. These organisms survive even when the surfaces of lakes and ponds are covered with ice. Which property of water best explains how aquatic organisms can survive during freezing temperatures?
Answer:
Anomalous expansion
Explanation:
Anomalous expansion of water is the abnormal way water expands when exposed to low temperature.
At 4 degree Celsius , the density at the top layer is usually at the Maximum which makes the water sinks down and then the water in the lower layer rises up.
When the temperature drops below 4 degree Celsius, the water molecules at the top then freezes leaving the denser molecules at the bottom which doesn’t freeze as a result of their high density.
This way, organisms can survive in the water due to the lower layer not freezing.
The epidermis is a muscle
True
Or
False
Answer:
false
Explanation:
because derm=skin and skin is not muscle skin is a type of tissue
hope this helped :)