Answer:
ancient sharks
Explanation:
Nicholas Steno can be considered as the father of paleontology. In the year of 1666, Steno received a shark specimen caught by two fishermen. Once he started dissecting it, he noticed that the teeth have very interesting shape. They reminded him of the ''tongue stones'' known since the antiquity. In fact, the ''tongue stones'' were actually teeth of ancient sharks, just that the people were not aware of that. Steno was quick to see the similarities, thus he made a conclusion that they have to be connected.
exposure to 100 R's :
•will have little effect
•can cause radiation sickness
•is enough to kill a person
?
Answer:
Will have little effect
Answer:
Your answer is B. Radiation Sickness.
Explanation:
Look it up on Go.ogle if you don´t believe me.
Hope this Helps! :)
Ecosystems change over time—even when they appear to be stable. What is the term for the predictable or orderly sequence of changes experienced by a community?
A.
turnover
B.
ecological succession
C.
eutrophication
Answer:
Ecological succession, I believe.
Answer: ecological succession
Explanation:
I did the study island
Scientists observe the thickness of a tree’s _______to learn about past climate conditions
Answer:
Scientists observe the thickness of a tree’s ring's to learn about past climate conditions
Hope this helps :)
Have a great day !
5INGH
Explanation:
Answer:
tree rings
Explanation:
sample response on edge
Savannas are ____________.
Answer:
Grassland with few trees and shrubs/vegetation
Explanation:
Which describes the function of the human sperm cell’s structure?
A)The nucleus contains all 46 chromosomes.
B)The tail allows it to travel to the egg.
C)The head contains a basic substance that counteracts acidic substances in the vagina.
D)The sperm’s structure allows it to live for two weeks in the vagina.
Answer:
The correct answer is B. The sperm tail helps in propelling and moving the sperm to reach the egg. It is made of proteins which contract and relax to cause the movement. The head and tail however, are covered by a single membrane. Head composes the nucleus.
Answer:
b
Explanation:
why not
Look at the food web shown above. Which of the organisms act as producers in the ecosystem
Answer: D. Plants.
Explanation: Because plants do photosynthesis, in which they take sunlight, and turn it into chemical energy, which they use for their daily life activities.
In the given food web , plants acts as a producer.
Plants are producers because they make their own food and out of it creates energy for their survival, reproduction and growth.
What is a Food Web?A food web is an interconnection of food chain in an ecological community.
A food web results into a pathway called feeding pathway where heterotrophs obtain food and energy from autotrophs which makes their own food.
Different kinds of feeding relation can be observed in food web which are:
Herbivory, Carnivory, Scavenging, Parasitism.
The concept was coined by Charles Elton in 1927.
Food Webs are limited representations of real ecosystems and necessarily aggregate many species into trophic species which are functional groups of species having the same predators and prey in the food web.
Ecologists use simplifications in the quantitative models of trophic or consumer resource systems dynamic.
Why Plants performs as Producers?Producers are defined as organisms capable of preparing their own food from simple inorganic substances like carbon dioxide and water using sunlight energy in the presence of chlorophyll.
Green plants are termed as producers as they synthesize their own food using photosynthesis process and thus produces food for themselves and helps to initiate food chain.
To learn more about Food web here
https://brainly.com/question/2233704
#SPJ2
____ are simple sugars
Monosaccharides
Polysaccharide
Disaccharides
Lipids
The correct answer is: Monosaccharides
Explanation: Monosaccharides, also called simple sugars, are the most essential units of carbohydrates. They are basic units of carbohydrates and cannot be additionally hydrolyzed to easier compounds. The general formula is (CH2O)x,
hope this helps :)
Malaria is one of the most common parasitic diseases in the world. It is caused by a protist from the genus Plasmodium. How can humans best avoid becoming infected with malaria?
A.
exercise regularly
B.
take medicine that destroys liver cells
C.
always wear long-sleeved shirts
D.
avoid mosquito bites
Hi!
D avoid mosquito bites. Mosquitos are a really nasty and efficient way to spread diseases. In this case, you would probably want a lot of bug spray.
Hope this helps!
Answer:
D = avoid mosquito bites!
What will probably happen to the plant if it does not receive any water for a month?
A.
It will stop growing.
B.
It will continue to grow at the same rate.
C.
It will still grow, but it will turn a darker green.
D.
It will start growing faster.
Reset Submit
Answer: Photosynthesis is the light dependent process which must occur for the plant to live. This process also requires water and carbon dioxide. If photosynthesis does not occur the plant will wilt and die.
Explanation:
Which sphere is part of the carbon and water cycles but absent form the phosphorus cycle
Answer: Atmosphere
Explanation:
How does water affect metamorphic processes? A. It decreases the rate at which metamorphic reactions take place. B. It stops elements from moving around within earths crust. C. it can have elevated concentrations of dissolved substances. D. It prevents the transfer of ions between and within minerals.
Answer:
it can have elevated concentrations of dissolved substances
Explanation:
Water is widely regarded as a universals solvent. During a metamorphic process, the presence of fluids most especially water cannot be over empahisized.
Water in metamorphic processes helps to concentrate dissolve materials and moves them from one point to another within the crust. By so doing, water helps to facilitate the rate at which the reaction and transformation occurs. Water available for metamorphic processes usually have elevated temperature, this would further aid to catalyse the transformation work on the rock.
Water plays nearly the same role as pressure and temperature in a metamorphic reaction. It serves as the mobile unit to move materials from one point to the to another. The water concentrates the dissolve materials that comes in contact with it and utilizes it to further produce new metamorphic minerals. Generally, fluids allow for better mobility.
Answer:
It can have elevated concentrations of dissolved substances.
what evidence places fish as the first vertebrates
Answer:
Fossils
Explanation:
Sulfur dioxide is released into the air but ends up in lakes and streams as acid rain. Based on your knowledge of the water cycle, explain how this happens.
As water evapo-transpires into the atmosphere from the biosphere and hydrosphere, it cools and condenses. The water droplets in the atmosphere dissolve the sulfur dioxide molecules in the atmosphere forming sulphuric acid;
SO2(g) + H2O(l) --> H2SO3(aq)
The precipitation will, therefore, have a low pH because it is acidic. The runoff from the precipitation end up in rivers and ultimately in lakes.
Answer:
When human beings burn fossil fuels they release, sulfur dioxide, nitrogen oxides into the environment.
Those air pollutants release in the atmosphere reacts with water, oxygen and some other gases to form nitric acid and sulfuric acid.
With the help of wind the substances are spread to hundreds of miles. When the acid rain reaches the earth, it flows through lakes and other ways to enter the water system.
at which step does during protein synthesis does a mutation occur
Answer:
Each codon codes for one amino acid or for a *Protein synthesis is the process in which proteins are made. In the first step, called transcription, the genetic code in DNA is copied by RNA. In the second step, called translation, the genetic code in RNA is read to make a protein.
Explanation:
During protein synthesis, mutations can occur during DNA replication, transcription, or translation at the ribosome. The proofreading function of DNA polymerases minimizes errors during replication, but if the mRNA is transcribed incorrectly or if incorrect translation occurs, mutations can result in alterations to the resultant protein.
The question pertains to the stage at which a mutation can occur during protein synthesis. Mutations are random changes in the sequence of bases in DNA and can be the ultimate source of genetic variation. During protein synthesis, there are several steps where mutations can occur:
During DNA replication, errors can occur when DNA polymerase makes mistakes in copying the DNA. These errors are called mutations and can affect the phenotype if they occur within the protein-coding sequence of a gene. However, this is quite rare due to 'proofreading' abilities of DNA polymerases.Transcription is the process where mRNA is synthesized from DNA. If mRNA polymerase doesn't transcribe DNA correctly, mutations may be introduced at this stage.The second step of protein synthesis, protein translation, occurs at the ribosome. If the ribosome translates the sequence of mRNA incorrectly, or if a substitution results in a premature stop codon, the resulting polypeptide chain can be functionally compromised.Other mutations are induced by environmental factors called mutagens. In some instances, such as with bacteria under stress, mutation rates can significantly increase as a self-defense mechanism.
How does ATP supply energy for cellular activities? by breaking off a phosphate group from its structure by releasing the sugar molecule from its structure by adding a phosphate group to its structure by attaching itself to a glucose molecule
Answer:
A) by breaking off a phosphate group from its structure
Explanation:
ATP supplies energy for cellular activities by breaking off a phosphate group from its structure. This released energy is used to do work by the cell, such as muscle contraction.
Explanation:ATP, or adenosine triphosphate, supplies energy for cellular activities by breaking off a phosphate group from its structure. When ATP is broken down, usually by the removal of its terminal phosphate group, energy is released. This energy is used to do work by the cell, usually by the binding of the released phosphate to another molecule, thus activating it. For example, in the mechanical work of muscle contraction, ATP supplies energy to move the contractile muscle proteins.
Learn more about ATP and cellular energy here:https://brainly.com/question/8383877
#SPJ6
Describe two ways in which waves travel, and give an example of each.
Answer:
Basically, sound waves carry noises through the air to our ears. SEISMIC WAVES travel inside the Earth and cause earthquakes. Light, heat, radio, and similar types of energy are carried by a variety of waves in the ELECTROMAGNETIC SPECTRUM. Some energy waves need a medium, such as water or air, through which to travel.
Explanation:
11. How does active transport differ from all other forms of transportation?
A. It creates an equilibrium shift
B. It maintains homeostasis
C. It shifts from high to low
D. It requires energy
Though both active transport and passive transport involve ion movement and use ion channels to move ions across the cell membrane, in or out of the cell.
Passive Transport (or Diffusion) moves ions from high concentration to low, using no metabolic energy. Active Transport moves ions from low concentration to high, using metabolic energy in the form of ATP.
So the answer is C.
Answer:
The Answer is D It requires energy
Explanation:
The movement of ions are assisted enzymes which uses energy.
Phosphorus isn't as abundant as nitrogen or carbon because it is contained in the
+ and
released with
processes, which can take a long time.
Answer: Lithosphere and geological
Explanation: The phosphorus is not as abundant as carbon because it does not occurs in the form of gas.
The phosphorous cycle is completed in the lithosphere as well as geological process which takes time. It is contained in the rocks and gets run off through water after weathering.This is how the plants get phosphorous from soil and water.
The run off then flows towards ocean and sea and gets deposited in the ocean. This is how phosphorous cycle takes place.
Phosphorus is crucial for life but isn't as abundant as nitrogen or carbon because it's found primarily as phosphate, which moves through the environment very slowly. It's leached from rocks and makes its way into bodies of water, where it can stay for thousands of years.
Explanation:Phosphorus is an essential nutrient for living processes; it's a major component of nucleic acid and phospholipids, and, as calcium phosphate, makes up the supportive components of our bones. Phosphorus is often the limiting nutrient, necessary for growth, in aquatic ecosystems. Phosphorus occurs in nature as the phosphate ion (PO4³-).
In addition to phosphate runoff as a result of human activity, natural surface runoff occurs when phosphate is leached from phosphate-containing rock by weathering, which sends phosphates into rivers, lakes, and the ocean. The movement of phosphate from the ocean to the land and through the soil is incredibly slow, with the average phosphate ion having an oceanic residence time between 20,000 and 100,000 years. Consequently, the abundance of phosphorus is relatively low when compared to elements like nitrogen or carbon.
Learn more about Phosphorus abundance here:https://brainly.com/question/34697100
#SPJ6
How might a gene mutation be silent, with no observable affect on a cell or an organism?
A. Many proteins are superfluous to the function of a cell. A gene mutation in a gene that encodes an unnecessary protein would have no observable affect on the cell or the organism.
B. Codons are complementary to anti-codons in tRNA. A gene mutation that changes a codon to its anti-codon would have no observable effect on the cell or the organism.
C. Several codons are stop codons. A gene mutation that inserts a stop codon when only a few amino acids remain in the peptide sequence would have no observable effect on the cell or the organism.
D. Many amino acids are coded by multiple codons. A gene mutation that encodes the same amino acid would have no observable effect on the cell or the organism.
Answer:
D
Explanation:
There is approximately 64 base combination of codons (3 bases sequences) that are possible from the four bases nucleotides that make up our DNA. Yet there are only approximately 20 types of amino acids in our bodies. This means that other than the 4 start and stop codons, there is a lot of redundancy in the coding of amino acids by codons. Therefore some mutations on codons will have no effect on the type of amino acid translated. These are the silent mutations.
The wing of a bird and the leg of a horse are very different looking structures. Although they look different, bird wings and horse legs are very similar in the arrangement of the bones that make up the limb. Which term is used by scientists to describe structures that look different on the outside but are actually similar in construction and develop from the same embryonic tissues?
A) common descent
B) ancillary anatomy
C) vestigial structures
D) homologous structures
Hi!
It is D, homologous structures.
Hope this helps!
Answer: D) homologous structures
Explanation:
Which of the following diseases is always caused by a bacterial infection?
A.
smallpox
B.
leukemia
C.
HIV
D.
diphtheria
Hi!
I would say D, diphtheria, because it is eaisly prevented by a vaccine and it I'd a nose and throat disease.
Hope this helps!
Diphtheria is always caused by a bacterial infection. Therefore, option (D) is correct.
What is Diphtheria?Diphtheria is a serious bacterial infection that affects the respiratory system and can lead to breathing difficulties, heart failure, and even death. It is caused by the bacterium Corynebacterium diphtheriae, which produces a toxin that can damage the body's tissues.
Smallpox (option A) is a viral disease that has been eradicated, and leukemia (option B) is a cancer of the blood and bone marrow that can be caused by various factors, including genetic mutations and environmental factors. HIV (option C) is also caused by a viral infection, specifically the human immunodeficiency virus, which attacks the immune system.
Learn more about Diphtheria, here:
https://brainly.com/question/31034802
#SPJ3
What controls a tropism?
A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism. Plants also exhibit phototropism, or growing toward a light source. This response is controlled by a plant growth hormone called auxin.
Hope it helped!
Please mark brainliest
Answer: It is controlled by the sun. It grows like a normal plant does. A plant grows towards the sun.
Explanation: Plants always grow towards the sun unless somehow they die. The sun controls them.
What is a solution give a example
Answer:
A solution is a homogeneous mixture of two or more substances.
Salt Water
Explanation:
what specialized tissue do vasculer plants have that other plants do not
Answer:
You didnt give me and choices so out of the information i have from this answer i can conclude that the answer is out of these 3 Options.
1.) Phyllids 2.) Xylem 3.) Phloem
The specialized tissue that vascular plants have that other plants dont are xylem and phloem. These vascular tissues allow plants to grow without drying out.
State two additional kinds of evidence beside structural and molecular that can further support the relationship between species
Answer:
Behavior maybe? The diet?
Explanation:
which process can affect the rate of carbon dioxide emissions or other greenhouse gas emissions by changing average temperatures?
Answer:
Greenhouse gas affect
Explanation:
Greenhouse gas
A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone
The process that can affect the rate of carbon dioxide emissions or other greenhouse gas emissions by changing average temperatures is called climate feedback and is present in Option A.
What is climate feedback?Climate feedback refers to the process by which changes in one component of the Earth's climate system lead to changes in other components, and there are many examples of climate feedbacks in the Earth's climate system. This includes a warming climate that can lead to the melting of glaciers and ice sheets, which in turn can cause sea levels to rise; another example of climate feedbacks is changes in ocean circulation patterns, which can affect the uptake and release of carbon dioxide.
Hence, the emissions of carbon dioxide or other greenhouse gas emissions caused by changing average temperatures are called "climate feedback" and are present in Option A.
Learn more about the climate feedback here.
https://brainly.com/question/13757233
#SPJ6
The question is incomplete, complete question is below
which process can affect the rate of carbon dioxide emissions or other greenhouse gas emissions by changing average temperatures?
A)climate feedback
B)positive loop
Which base sequence in the DNA molecule identifies the region where a transcription factor will bind, allowing RNA polymerase to attach to the molecule?
a. AACCTG
b. TGGA
c. TATATA
d. AGGAT
TATATA base sequence in the DNA molecule identifies the region where a transcription factor will bind, allowing RNA polymerase to attach to the molecule. So, the correct option is C.
What is Transcription factor?A transcription factor is defined as a protein that regulates the rate of transcription of genetic information from DNA to messenger RNA by binding to a specific DNA sequence.
Most of the transcription factors are located in the cytoplasm, after which it receives signals from the cell membrane signal transduction, transcription factors are activated and then move from the cytoplasm to the nucleus where they interact with the associated DNA frames.
The TATATA base sequence in the DNA molecule identifies the region where a transcription factor will bind.
Thus, the correct option is C.
Learn more about Transcription, here:
https://brainly.com/question/29979094
#SPJ6
Final answer:
The TATA box, represented by the sequence c) TATATA, is where transcription factors bind allowing RNA polymerase to initiate transcription.
Explanation:
The region on a DNA molecule where a transcription factor will bind, allowing RNA polymerase to attach to the molecule, is identified by a specific base sequence known as the TATA box. This sequence is typically a repeat of thymine and adenine dinucleotides, represented as TATATA or a slight variant thereof. Transcription factors first bind to the TATA box, which allows for the assembly of an initiation complex. Subsequently, RNA polymerase recognizes this complex and binds to the DNA, initiating transcription.
A person asks questions about what causes sound waves to transfer through the air. what is the best description of what this person is doing? A listening to music B looking for a solution C designing a new device D studying science
Answer:
I think it's A could be wrong
Explanation:
The person seeking answers about what causes sound waves to transfer through the air is essentially studying science. They're investigating how sound waves, disturbances of matter that carry from their source, work in transferring sound. The process involves vibrations causing variations in pressure, which our ears and brains interpret as sound.
Explanation:The person asking questions about what causes sound waves to transfer through the air is essentially studying science, specifically Physics. Sound waves are a type of pressure wave and are disturbances of matter that are transmitted from their source outward. An example of this can be when a speaker produces sound. The speaker uses a cone to create oscillations that result in the vibration of air molecules. These vibrations form compressions (high-pressure regions) and rarefactions (low-pressure regions), which move out as longitudinal pressure waves or sound waves with the same frequency as the speaker.
In human hearing, these sound waves cause the eardrum to vibrate. This complicated mechanism then converts the vibrations into nerve impulses which the brain perceives as sound. Even things like music are pleasant due to the changing frequencies of various instruments and voices, which form different sound waves.
Learn more about Sound Waves here:https://brainly.com/question/11797560
#SPJ3
if a control group is NOT included in an experiment, it would be difficult to
Answer:
Find the base of the experiment
Explanation:
If i tested how high my new jumping boots could go, then i would first have the person jump without them and then jump with them. I would use the control (without the shoes) and compare it to how high the person went WITH them on.
Without a control group in an experiment, it's difficult to determine whether the outcomes observed were truly due to the variable being tested or some other factors. A control group acts as a reference point, showing what happens when the variable isn't applied, which is key for comparison with the experimental group. Excluding a control group may result in misleading or unreliable results despite the additional difficulty of including one.
Explanation:If a control group is NOT included in an experiment, it would be difficult to discern whether observed outcomes were in fact due to the variable being tested or if they resulted from some other external factors. The control group acts as a baseline or reference point in an experiment. It represents what happens when the variable or treatment is not applied, which is vital for comparison with the experimental group where the treatment is applied.
For example, in drug testing experiments, a control group may receive a placebo while the experimental group receives the actual medication. Both groups must otherwise be managed exactly the same, meaning they need to have comparable characteristics and demographics. By doing this, researchers can confidently attribute any statistically significant differences in outcomes between the two groups to the effect of the drug being tested, and not due to chance or other variables.
Excluding a control group from an experiment could mean that the results could be misleading, inconclusive, or unreliable. While including a control group in experimental design might seem more difficult, it's an integral part of ensuring the validity and integrity of the experiment data and findings.
Learn more about Control Group in Experiments here:https://brainly.com/question/34177671
#SPJ2
25+ POINTS!
Quick question, how do scientists use genetic information? Why is it useful?
Answer:
The new genetic information is useful to public health scientists because it allows them to test for relationships between diseases and genetics. The most common way scientists collect genetic information on a DNA sample is to interrogate a specific point in the genome using a technique we call “genotyping.”
Explanation:
Answer:
The new genetic information is useful to public health scientists because it allows them to test for relationships between diseases and genetics