How do index fossils help scientists?
Fossils are used to determine the ages of rock layers. ... Index fossils are of organisms that lived over a wide area. They lived for a fairly short period of time. An index fossil allows a scientist to determine the age of the rock it is in.
when did large mouth bass arrive in nebraska
Explanation:
around 1880 and 1883
i think
True or false, as density of ocean water increases, The speed of the ocean currents decreases
Answer: Very True
Explanation:
A hole in the skin causes platelets to
rush to the site and release a chemical
that releases more platelets. This is an
example of what type of mechanism?
Answer:
b number positive feedback
"A hole in the skin causes platelets to rush to the site and release a chemical that releases more platelets" is an example of a positive feedback mechanism. The correct option is B.
What is a positive feedback mechanism?A positive feedback mechanism is a technique of the body in which the body works or secretes something to the body that is needed more in the body, and it is secreted in the body out of league and number.
Platelets are present in the blood. They are spherical and are colorless and small. They help in blood clotting when there is a cut or bleeding, it prevents loss of blood by clotting the blood.
So, in the hole of the body, there will be blood loss, and releasing more platelets would help in blood clotting.
Thus, the correct option is B. positive feedback mechanism.
To learn more about the positive feedback mechanism, refer to the link:
https://brainly.com/question/13712869
#SPJ2
The core of the immune system is made up of
red blood cells.
platelets.
white blood cells.
intact skin.
intact mucus membranes.
Answer:
red blood cells
Explanation:
white blood cells are used for fighting against diseases
.Marcus has $15.00 to spend on fruit. He buys 3 mangoes and spends the rest of the money on grapes. The store charges $0.75 for each mango and $2.50 per pound for grapes
Answer:
Explanation:
after he spent money on mangoes it was a total of 12.75
so he bought like 5lb of grapes
How is space exploration important to the economy?
Explanation:
Space exploration thus supports innovation and economic prosperity by stimulating advances in science and technology, as well as motivating the global scientific and technological workforce, thus enlarging the sphere of human economic activity.
come up with a question for an investigation that can be done at a forest preserve (make sure to include an independent and dependent variable) 15 pts
Answer: What are the most effective new chemical treatments of various invasive species?
Explanation:
independent variable: chemical treatments
dependent variable: the type of species
I might be wrong on the variables
A researcher sequences the genome of a variety of bacterial and eukaryotic cells. She finds that the bacterial genome is smaller, but that there are more genes for a given number of base pairs in the eukaryotic cells. In other words, there are fewer genes per unit of length of DNA in the eukaryotic cells. What do you predict she will find if she examines the DNA more closely
From this observation, it is possible to conclude that there are more repetitive sequences in the eukaryotic DNA than in the bacterial DNA. Prokaryotic genes do not contain introns.
Introns are internal non-coding segments of eukaryotic genes that must be removed to produce the final mature mRNA.
In prokaryotic genomes, there are no introns, and genes are expressed in groups known as operons.
Eukaryotic genomes contain highly repetitive intergenic (regulatory) and intragenic (introns) non-coding regions.
Learn more about eukaryotic DNA here:
https://brainly.com/question/13426587
How does meiosis most benefit a species?
It decreases the number of chromosomes.
It increases genetic variation.
It increases the number of chromosomes.
It increases mutations.
Answer:
It increases genetic variation.
Explanation:
Meiosis does not decrease the number of chromosomes nor increase the number of them, it merely splits them.
While it could increase mutations, this might not necesarily be a good thing.
However, it does increase genetic variation, especially during the process where crossing over occurs. Increased genetic variation is beneficial for the population for many reasons like higher resistance to certain diseases. Increasing genetic variation also makes a species look unique from other members of the species.
3. Shows like Sesame Street are part of the public health model of service delivery.
O True
O False
4. Which model of service delivery would focus most on getting a disabled person back into the workforce by focusing on what skills they still have or can develop?
O Medical model
O Public health model
O Social service model
O Human service model
Answer:
4. True
5. Social service model
Welcome back from your expedition into the cells! Let's see if you paid attention to the molecules that are involved in the smooth muscle contraction. Which neurotransmitter is released from the parasympathetic ganglion?
Acetylcholine is referred to the neurotransmitter that is released from the
parasympathetic ganglion.
Acetylcholine is the main neurotransmitter found in the parasympathetic
nervous system. Its effects are either excitatory or inhibitory. It is a chemical
which is released by neurons to aid transmission of signals to other cells of
the body.
It helps in the contraction of the muscles, peristaltic movement of the
stomach, as a vasodilator etc.
Read more on https://brainly.com/question/6148688
What is the function of the
vacuole in plant cells
A. Controls cells activity
B. Stores water and nutrients
C. Produces energy for the cell
D. Removes waste from the cell
Answer:
B. Stores water and nutrients
Explanation:
Based on the chart, describe the trends that can be observed in animal and plant fossils as they evolved over time. Use evidence from the chart to support your conclusions.
Based on the chart, we can conclude that the first vertebrates were fish. Moreover, the chart also shows that flowering plants are the last plant taxonomic group that emerged on Earth.
In this case, the chart suggests that the earliest vertebrates (fish) evolved during the Ordovician period.
The main animal groups that emerged during vertebrate evolution include (in this order) amphibians, reptiles, mammals, birds and finally humans.
Moreover, according to the chart, the latest major group of plants to evolve were flowering plants during the Cretaceous period.
Learn more about vertebrate evolution here:
https://brainly.com/question/22652159
plz help 50 points
the question is in the screenshot
Answer:
4/16
4/16
4/16
4/16
Explanation:
Late, i know sorry the other guy is 100% wrong this is correct hope it helps someone or anyone
Sea corals live exclusively in the ocean and are radially symmetrical. They have microscopic stinging barbs that shoot out to immobilize their prey. This allows corals to hunt even while they are stuck to the ocean floor.
What animal phylum do corals belong in?
chordates
mollusks
cnidarians
annelids
Answer:
phylum Cnidaria
Corals, anemones and jellies are related and all classified in the phylum Cnidaria or “stinging needles.” The animals in this group are aquatic, possess stinging cells within their tissues and have a body plan characterized by radial symmetry, which allows all parts of their bodies to be equally receptive and ...
Explanation:
Answer:
A. chordates
Explanation:
Tastes associated with caffeine, quinine, or aspirin are detected primarily by ________ taste receptors.
Tastes associated with caffeine, quinine, or aspirin are detected primarily
by bitter taste receptors.
These receptors can either be TAS2Rs or T2Rs and they help to protect
against harmful food substances. They are also responsible in the
stimulation of hormones which increases hunger.
Bitter taste receptors are found in the oral cavity and stomach and it is the
receptor which bind to more than fifty percent of all the drugs
manufactured.
Read more about Bitter taste receptors here https://brainly.com/question/10733985
which is true about a hypotonic solution? a. it has a higher concentration of wtwr and a lower concentration of solutes than another solution
b. ut has a higher concentration of solutes and a lower concentration of water than other solution
c. it has an equal concentration of water and solutes as another solution
d. it has more solutes than solvent than another solution
Answer:
A
Explanation:
A hypotonic solution has a lower concentration of solutes than another solution, but has more water.
What are the four types of physical hazards?
Select the 4 answer options that apply.
Extreme Temperature
Radiation
Vibration
Noise
Pathogens
Corrosive substances
Answer:
1st 4 are the physcal hazards
Explanation:
a)
b)
c)
d)
The four types of physical hazards are Extreme Temperature, Radiation, Vibration and Noise.
What are Physical Hazards?A physical hazard is an agent, factor or circumstance that can cause harm with contact. They can be classified as type of occupational hazard or environmental hazard.
Physical hazards include ergonomic hazards, radiation, heat and cold stress, vibration hazards, and noise hazards.
Whereas, Corrosive substances comes into chemical hazards and Pathogens can be classified as biological hazards.
Thus, the Extreme Temperature, Radiation, Vibration and Noise are the best four options as the type of physical hazards.
Learn more about physical hazards, here; https://brainly.com/question/21819671
#SPJ5
Traditional antibiotics build immunity by exposing the memory cells of our body to inactive versions of viruses or bacteria.
True
False
Conventional antibiotics increase immunity by exposing our bodies' memory cells to dormant viruses or bacteria. So, the aforementioned is True.
What are Antibiotics?A particular class of antimicrobial agent that works against bacteria is an antibiotic. Antibiotic drugs are frequently used for the treatment and control of bacterial infections because they are the most effective type of effective antibacterial for doing so. Bacteria may be killed or have their growth suppressed.
Several types of bacterial infections are treated or prevented with the help of antibiotics. They either eradicate bacteria or stop them from proliferating and spreading.
Viral infections cannot be treated with antibiotics. This covers the typical cold, the flu, the majority of coughs, and sore throats. By introducing our bodies' immunological memory to latent viruses or bacteria, traditional antibiotics boost immunity.
Therefore, the given statement is True.
Learn more about Antibiotics, here:
https://brainly.com/question/10868637
#SPJ3
Convert 63°F to degrees Celsius.
If necessary, round your answer to the nearest tenth of a degree.
Here are the formulas.
5
9
9
F=-C+32
5
c=E(F-32)
+
Answer:
C = 5/9(F - 32)
C = 35
35 = 5/9(F-32)
35 * 9/5 = (F-32)
(F-32) = 63
F = 63 + 32 = 95
PLZ HURRY
Which of the following is organized into chromosomes (there may be more than one awnser )
Dna
tRNA
mRNA
None
The Changing Forms of Carbon
In this activity, you will describe and apply what you just learned about the carbon cycle. You will examine the
picture below and then write two paragraphs that describe the process and changing forms of carbon.
Global Carbon Cycle
Wo.com
Atmosphere
Tour
750
Soil Respiration
Docomposition Photosynthesis
58
120
Burning
Plant
Fossil
Respiration
Fuels
59
Deforestation
and Land Use
Change
1.1
Ocean
Loss
Ocean
Uploke
90
7.7
92
IL
Plants
560
Litterfall
59
Rivers
0,8
Soils
Fossil Fuels
5,000 -10,000
1,500
Earth's Crust
100,000,000
Surface Ocean 725
Intermediate and
Deep Ocean 37,275 Pg
0.01
Borial to Sediments
Carbon is found in different forms on the Earth. It is found as carbon dioxide in the atmosphere, as carbonate and bicarbonate salts in various minerals, as well as it occurs in the elemental form of diamonds and graphite. All biotic factors are based on carbon-containing molecules like carbohydrates, proteins, fats, nucleic acids and vitamins. Carbon is incorporated into life-forms through photosynthesis which is performed in the presence of sunlight by all life-forms that contain chlorophyll. Photosynthesis converts CO2 from the atmosphere or dissolved in water into glucose molecules. These molecules are either converted into other substances or used to provide energy for the synthesis of other biologically important molecules.
The use of glucose to provide energy to living things involved the process of respiration in which oxygen may or may not be used to convert glucose back into CO2. This CO2 goes back into the atmosphere again. The process of combustion also adds to the level of carbon dioxide in the atmosphere. This percentage is said to have increased when human beings started cutting down trees, burning fossil fuels, etc. on a very large scale. Thus, carbon is cycled repeatedly through different forms by the various physical and biological activities and this cycle is therefore called carbon cycle.
Hope you could get an idea from here.
Doubt clarification - use comment section.
Carbon cycle is a biogeochemical cycle in which the carbon atom continously moves in the atmosphere through different forms and processes.
What is Carbon cycle?The carbon cycle is the biogeochemical cycle which describes the process through which carbon atoms continually travel from the atmosphere to back to the Earth and then back into the atmosphere. This cycle goes on repeatedly. Since our planet and its atmosphere forms a closed environment, the amount of carbon in this system does not change, it only transforms from one form to another.
The processes which takes place in carbon cycle include photosynthesis, decomposition, respiration, and combustion. Carbon cycles from the atmosphere into the plants and living things. For example, carbon is a pollutant in the atmosphere which is present as carbon dioxide gas.
Carbon moves from the plants and animals to soil. When the plants and animals die, their bodies, wood, and leaves decays which being carbon into the ground. Some of this carbon is buried and become fossil fuels in millions of years. Carbon moves from living things to the atmosphere through respiration in which they inhale oxygen gas and exhale carbon dioxide gas.
Learn more about Carbon cycle here:
https://brainly.com/question/1627609
#SPJ2
Applying the systems thinking techniques, outline the practical steps that can be taken to address drought
Some practical steps to address drought may include the implementation of efficient water usage techniques, the protection of vegetation, and the use of methods to retain moisture in the soil.
What is a drought?A drought is classified as the shortage or absence of water for a prolonged period of time in a region. These can be caused by a prolonged lack of rainfall.Other factors include poor water management and lack of vegetation.Methods to avoid droughts.The planting and protection of vegetation, primarily those adapted to dry environments, is important in preventing drought.Furthermore, the correct implementation of efficient water usage techniques can aid in preventing drought by limiting the amount of water that is wasted. Lastly, the use of mulch and other water retainers can be an effective method in keeping the soil moist and aids in the previous two methods.Therefore, we can confirm that the most effective ways to avoid droughts are to practice efficient water use so as to not waste water, to plant and protect vegetation, and to use mulch and other moisture-retaining methods to keep the soil from drying.
To learn more about droughts visit:
https://brainly.com/question/2791517?referrer=searchResults
Artificial Selection and the English Bulldog:
Part C: Take Notes In a separate location, take notes from the sources you have identified. The notes will provide details for your paper. While taking notes from texts and websites, use these reading strategies. In the space provided, write four pieces of information that you intend to use in your paper.
Answer: Cannot give answer because:
Explanation: The image is unreadable.
Researchers have found that most individuals are able to remember information about what age?
Three-four?
Answer:
2 and younger
Explanation:
If three is the youngest option, please select that one!
A change in the sequence of bases in a DNA molecule is know as
Answer:
A point mutation is a change in the base sequence of a DNA molecule.
Explanation:
Which part of the sentence given below has an error in it? Lizza and Mike/ lives happily even in a/ small cottage near their farm. 1. lives happily ever after in a 2. No error 3. Lizza and Mike 4. small cottage near their farm "(tejyb nphkt)"
Answer:
Liza and Mike are two persons so that they are plural. Therefore they take '' live'' not' ''lives''
how is biomimicry is used in companies help
Answer:
Looking to nature for inspiration can help individual designers in multiple ways. Designers are innately curious, and biomimicry provides the opportunity to learn about life's water, energy and material-use strategies. This perspective broadens the design space to bring new solutions to the table.
Explanation:
please mark my answer in brainlist plz
What are the two kingdoms of prokayotic organism?
Answer: Bacteria and Archaea
Explanation: