The percentage of geologic time does the fossil record represent 20%.
What are Fossils and Fossil records?Fossils refers to remnants or traces once-living thing from the past. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood, oil, coal, and DNA remnants.
Fossil record is the compilation of all known and unknown fossils over a period of time.
The importance of fossil records includes:
1) Fossil records give scientists clues as to what the Earth was like millions of years ago.
2) Fossil records are used to determine how organisms alive today evolved.
3) It helps to understand how life in has changed over time.
Thus, percentage of geologic time does the fossil record represent 20%.
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Describe what brownfields are and how they can be assessed.
Brownfields are abandoned or commercial properties that are contaminated with hazardous substances or pollutants.
What are brownfields?Brownfields are perceived as too risky to redevelop due to cleanup costs and other legal issues. The assessment of brownfields involves a multi-step process including site investigation, risk assessment, and cleanup planning.
Site investigation involves the gathering of information about the history, current conditions, and potential contaminants of the property, which involve reviewing records, conducting sampling and analysis of soil, groundwater, and other environmental media.
Risk assessment involves the evaluation of the potential risks associated with the contaminants and determining the cleanup level needed to protect human health and the environment. Cleanup planning involves the development of a strategy to address the contamination, which may include remediation, monitoring, etc.
Therefore, the brownfields are assessed through a combination of site investigation, risk assessment, and cleanup planning to help in the redevelopment of underutilized properties.
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Whats a independent variable and dependent varivle
Answer: The independant variable is what you change on purpose in the expirament and the dependant is the outcome of the expirament
Explanation:
Answer:
The dependent variable is the one thing that stays the same throughout the experiment.
The Independent variable is the one thing that changes in the experiment.
Example: You are measuring how far a marble will roll off of a ramp. The marble and distance is the dependent variable. The height of the ramp is the independent variable because you change the height every test
Explanation:
what is the meaning of extincion?
Extinct: (of a species, family, or another group of animals or plants) having no living members; no longer in existence.\
Extinction: the fact or process of a species, family, or another group of animals or plants becoming extinct.
Current understandings of cell membranes incorporate the __________________________ model, where a flowing, phospholipid "sea" contains mobile glycolipids, sterols, and proteins.
Select one:
a. expanding balloon
b. quilt
c. temperature filtering
d. fluid mosaic
A rod shaped organism with no nucleus commonly found in the soil will most likely belong to which kingdom
why do staturated fatty acids have straight structures
Answer:
"The chemical structure of a saturated fatty acid exhibits each carbon bonding to the adjacent carbon with single bonds. Each carbon is also bonded to two hydrogen atoms. The linear nature of saturated fatty acids allows for tightly packed formations, causing them to be solid at room temperature"
That's what I know and I hope it wiill help you.
Describe how the kidney and bladder work together to remove waste from the body (y'all I understand nothing about biology)
I will give points to anyone who answers!
Answer:
D
Explanation:
trust
How does the West Nile virus spread?
Who is at risk of becoming ill from West Nile virus?
Answer:
people over 50 years of age
Explanation:
taking it right now
PLEASE HELP
i have no more than a month left of school and im not trying to procrastinate this even more. you would be saving a life smh
Answer:
he population in Trait A has a higher percentage of plants
Which of the following could be left out of an electrical circuit?
the power source
the switch
the wire
the resistor
Answer:
The resistor
Explanation:
The resistor could be left out of an electrical circuit. The other three are the main requirements.
hope this helps and is right!! p.s. i really need brainliest :)
Which of the following is NOT a
place that releases enzymes for
digestion?
A. mouth
B. stomach
C. intestine
D. esophagus
Answer: D. esophagus
Explanation: Because esophagus uses muscles and does not use enzymes to digest. It only transports food to the stomach and then goes further into the digestive system.
Pls HELP ASAP !!!!!!!
A hypothesis that girls have better memory than boys
Answer:
If a group made up of 50% boys and 50% girls is asked to read a passage, then the girls will remember more of what they read than the boys because girls have better memories than boys.
Explanation:
A hypothesis is a statement that explains what you think will happen in an experiment and why. It is framed as "if...then...because." The "because" part should be based on research and not personal opinion. A good hypothesis will be more than a single sentence, and will cite research on the subject.
What additional procedure must be done to indicate glucose is present?
The glucose urine test estimates the amount of sugar (glucose) in a urine sample. The existence of glucose in the urine is called glycosuria or glucosuria. Glucose classes can also be calculated using a blood test or a cerebrospinal fluid test.
What is diffusion?Diffusion refers to the natural tendency of a system to homogenize the concentrations of chemical species within it.
It is an irreversible transport phenomenon that results in the migration of chemical species into a medium. Under the effect of the thermal agitation, a displacement of the constituents of the zones of high concentration towards those of low concentration is observed.
Thus, The glucose urine test estimates the amount of sugar (glucose) in a urine sample.
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Which is a reservoir for nitrogen? A. lightning B. biomass C. nitrogen gas D. ammonium E. nitrogen-fixing bacteria
Answer:C is the answer
Explanation:
trust me c is the answer answer but is that Buba aka 100x
Answer:
biomass
Explanation:
got it right
Need help answering packet
Which brain structure relays incoming sensory information.
The thalamus is an egg-shaped structure in the middle of your brain that acts as a relay station of all incoming motor (movement) and sensory information — hearing, taste, sight and touch (but not smell) — from your body to your brain
The thalamus in your brain functions as a relay point for information. Your thalamus is required to digest all of the information coming in from your senses (with the exception of your sense of smell) before it can be transmitted to the cerebral cortex of your brain for interpretation.
In addition, the thalamus contributes to the processes of sleeping, waking, being conscious, learning, and remembering.
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what is the purpose of life? 0ω0
Answer:
Live, Laugh, Love ♡
Have a blessed day! ^^
(yes I'm being one of those cheesy ppl that says that )
Answer
"The meaning of life is to find your gift. The purpose of life is to give it away"-Pablo Picasso
Explanation:
1.
Fossil records are all the fossil on Earth.
Answer:
That is not true because there could still be fossils that a paleontologist hasn't yet uncovered.
Explanation:
Hope this helps....if not then sorry for wasting your time and may God bless you
Help Is it a b c or d
Why does uncontrolled growth of algae in a lake cause fish to die?
A.Bacteria that eat dead algae use up all the oxygen in the water.
B.The algae interfere with the fish's ability to reproduce.
C.Predatory fish increase in number and destroy other fish populations.
D.The algae compete for the same food source as the fish.
Answer:
A
Explanation:
bacteria does respiration using dissolved oxygen in water, therefore concentration of dissolved oxygen present in water is reduced making fish unable to perform respiration hence they will die.
Suppose that a mutant plant is unable to make methyl salicylate. Why is it not likely to survive in the wild
Answer: because I’m order for it to compete with the others it has to be able to make methyl salicylate
Explanation:
Conclusions 2. Two new species of plants were introduced into an area that was low in available nitrogen compounds in the soil. One formed nodules and one did not. Which species would you expect to grow more robustly? Explain. (4 points) Answer here..
Answer:
The one forming nodules would grow better.
Because it may be a leguminous plant.
Rhizobium bacteria will reside in the root nodules and fix atmospheric nitrogen for these plants by symbiotic relation.
They will fix nitrogen in the soil and increase soil nutrient quality.
The following statement(s) is(are) true about scabies and pediculosis. a. They are two common parasitic infections to infest humans. b. Both are caused by impaired blood supply to the skin. c. They are diagnosed by visualization of the ulcers. d. All choices are correct.The following statement(s) is(are) true about scabies and pediculosis. a. They are two common parasitic infections to infest humans. b. Both are caused by impaired blood supply to the skin. c. They are diagnosed by visualization of the ulcers. d. All choices are correct.
They are two most common parasitic infections to infest man. That is option A.
What is scabies?Scabies is defined as an infection that affects the skin which is cased by parasites.
It bares the following features which include itching, rashes and sores.
Pediculosis is also a parasitic infection of parts of the body that is hairy such as the head and public region of the body.
Therefore, scabies and pediculosis are the two most common parasitic infections to infest man.
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what is a Bcell?
A. An antigen that makes antibodies
B. A lymphocyte that makes antibodies
C. A pathogen that makes antigens
D. A virus that makes bacteria
Answer: B
Explanation:
B cells are A type of white blood cell that makes antibodies. B cells are part of the immune system and develop from stem cells in the bone marrow they are also called B lymphocytes
n this experiment the bag contains a hypertonic solution (sucrose), while the beaker only contains water. If you leave the bag inside of the beaker for approximately 45 minutes; the movement of water will occur from the ________ to the _________.
The water will move from beaker to the bag of sucrose due to concentration difference.
In which direction the water will move?The movement of water will occur from the beaker to the bag because the concentration of water is lower in the bag and higher in the beaker. So due to the process of diffusion, the water will move from the higher concentration region to lower concentration region.
So we can conclude that the water will move from beaker to the bag of sucrose due to concentration difference.
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17. What is meant by the transition interval of an indicator?
The pH range over which an indicator alters the color defines the transition interval of an indicator.
What do you mean by Transition?A Transition may be defined as a condition or process where one state of a compound changes into the other.
A Transition interval is a point where the color of indicators may change. For example, Phenolphthalein changes pink from colorless at a pH of 8-10. So, this point is called the transition interval.
Therefore, the pH range over which an indicator alters the color defines the transition interval of an indicator.
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Life system: cyanobacteria begin photosynthesis and produce oxygen. Earth system: free oxygen reacts with rocks (axidation), resulting in increased rates of weathering for soil
production. Life system: land plants evolve and take root in terrestrial soil.
O Life system: cyanobacteria begin photosynthesis and produce oxygen. Earth system: free oxygen reacts with all available dissolved iron in the ocean. Life system: mass extinction
event of anaerobic organisms occurs from buildup of oxygen in the ocean.
• Earth system: oxygen moves from the ocean to the atmosphere through gas exchange. Earth system: free oxygen reacts with incoming solar radiation to form ozone. Earth system:
ozone collects in the stratosphere to form the protective ozone layer.
O Earth system: molten Earth forms into layers based on density and pull of gravity. Earth system: Earth cooled, and the water vapor in the atmosphere condensed and created the
oceans. Life system: cyanobacteria evolved.
The cyanobacteria were already there without the oxygen, so that rules out A, and a lot of prokaryotes were anaerobic, so that rules out Finally, Photosynthesis does not require oxygen. Instead, Oxygen is a waste product of it.
What is photosynthesis?Photosynthesis is a process that occurs in the chloroplast organelle of plant cells. The typical light reaction of photosynthesis takes place inside the thylakoid membrane of the chloroplast. The chief reactants such as water and carbon dioxide participate in the reaction. The water gets oxidized in the reaction to release oxygen as a product. The carbon dioxide gets reduced.
Thus, Photosynthesis is a process that occurs in the chloroplast organelle of plant cells
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Question 7 of 10
When would a forest be sustainable?
A. When supply and demand are both zero
B. When demand increases while supply stays the same
C. When demand exceeds supply
D. When supply exceeds demand
S
Answer:
D. When supply exceeds demand
Explanation:
If you have more woods than current demand, you can save some wood to sell later and conserve the trees. This way it would be sustainable for long time.