Stone tools are found on their own because they do not decompose and stay as they are.
What is the importance of stone tools in human history?In the broadest definition, a stone tool is any tool that is manufactured totally or mostly of stone.
Some stone tools were used for chopping fruits and roots as well as for cutting flesh and bone, removing bark from trees, and cutting into hides, or animal skins. A few of them served as handles. Some were used to create hunting spears and arrows.
Early human creations, such as stone tools and other artifacts, provide information on how people lived, interacted with their environment, and changed over time. Thousands of archaeological sites have been investigated, excavated, and dated during the last 2.6 million years.
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Why is Global warming occurring?
Answer:
Global warming occurs when carbon dioxide (CO2) and other air pollutants collect in the atmosphere and absorb sunlight and solar radiation.
Explanation: do you want one?
How is the Sun different from planets?
a. the sun produces its own light, but planets only reflect light.
b. the sun is spherical in shape, but planets are not.
c. the sun exerts a gravitational pull on objects around it, but planets do not.
d. the sun is made up of elements not found on any of the planets.
Answer:
A is correct! I want to be an astronaut when I grow up so trust me!
Explanation:
Answer:
The right answer is a (the sun produces its own light but planets only reflect light)
5. Name one crustacean that lives in the ocean, one that lives in freshwater, and one that lives on land.
Answer:
Pillbugs or woodlice live on land
Crabs or lobsters live in Ocean
Explanation:
Decapods live in oceans(crayfish, lobsters,crabs)
isopods live on land (pillbugs,woodlice)
What’s the largest lake in Florida (don’t search)
Answer:
lake Okeechobee
Explanation:
i live in Florida so i know
i didnt search so dont count on me but i think its like 750 sq miles or sumn crazy like that
Which one:
-a autosomal recessive trait
-a sex-linked trait
-a polygenic trait
-a autosomal dominant trait
Which explains how interference is avoided between the signals that cordless phones receive and the signals that they broadcast?
Answer:
the signals have different frequency
Explanation:
The way that interference is avoided in these cases is that the signals have different frequency. Cell phone signals travel in a very specific wavelength, how often this wave repeats in a given span is called the frequency. By having these signals in different frequencies it prevents the signals from mixing with each other and instead allowing them to reach their destination intact. Otherwise, the signals would combine into a mess of uncomprehensible data, which is what we call interference.
Answer:
D.anywhere its service broadcasts and it can receive a signal.
Explanation:
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Clownfish, sea anemone, coral, sea urchins, sponges, and parrot fish are just a few examples of the large variety of organisms that can be found in a coral reef. The coral reef and its inhabitants are suffering due to several factors such as pollution, coastal development, sedimentation and destructive fishing practices. What would be the most likely result if some of the species in the coral reef are destroyed? Other organisms would move into the coral reef area ⊝ The coral reef would be allowed to flourish without so many fish and plants living in and around it. ⊝ The coral reef would begin to deteriorate without the variety of fish and plants necessary to maintain balance. ⊝ The waters surrounding the coral reef will become cool with the decreasing number of organisms living there ⊝ CLEAR ALL ❮ PREVIOUS ... 6 7 8 9 10 11 12 13 14 15 ...
Answer: If some of the species in the coral reef are destroyed, (The coral reef would begin to deteriorate without the variety of fish and plants necessary to maintain balance)
Explanation:
CORAL REEFS is a ocean habitat that provides shelter for a variety of aquatic animals such as clownfish, sea anemone, coral, sea urchins, sponges, and parrot fish which are just a few examples of the large variety of organisms that can be found in a coral reefs. These animals are responsible for building the reefs which takes different forms and helps in maintaining balance. This habitat is important to marine life as it provides food and shelter for them.
Recently, many human activities has posed a threat to the coral reef and it's inhabitants These activities include:
--> Pollution: this is cause any agricultural run offs, Chemical and oil spills which can damage coral growth and reproduction.
--> coastal development: an unplanned coastal development has a damaging effect on the coral reef habitat.
--> Sedimentation: This can lead to increase in turbidity of coastal waters which in turn reduces light availability to the coral reef.
--> Destructive fishing practices: inadequate management of different fishing practices has led to the depletion of key reef species and habitat damage.
From the above explanation, the aquatic species found in the coral reef are responsible for building and maintaining the reef. If they are DESTROYED due to the above mentioned human activities, the reef will begin to deteriorate.
Answer: it’s b
Explanation:it’s b
PLEASEEE HELPPPPPPPPPP
Answer:
HIV is a bacterial disease, so antibiotics cannot be used to treat it directly.
1. Use a condom everytime you have sex.
2.Limit your sexual partners.
Forest A
Forest B
Two forest communities are shown here at different stages of succession. The different plant species and their relative abundance are
indicated by the diagrams. Researchers find that rodent populations are more abundant in forest A while deer populations are more
abundant in forest B. What describes the difference in the populations observed by the researchers?
es ))
A)
Forest A has is in an earlier stage of succession and does not have as many
mature trees upon which deer feed.
B)
Forest B lacks grasses due to lower light levels at the ground, removing a
species that is toxic to most deer populations.
0)
Forest B lacks the canopy closure required for protection of rodents from
predators, which decreases the rodent populations.
D)
Forest A is at a later stage of succession, allowing for more rodents to
migrate into the area and be found at a higher abundance.
Answer:
a, forest a is correct answer
Which is evidence of climate change due to geological evolution?
gases found in the atmosphere
fossils buried in sedimentary rock
tropical plant fossils found in the jungle
fossils from ocean organisms found in what is now a desert
Answer:
Evidence from the geological record is consistent with the physics that shows that adding large amounts of carbon dioxide to the atmosphere warms the world and may lead to: higher sea levels and flooding of low-lying coasts; greatly changed patterns of rainfall2; increased acidity of the oceans 3,4,5,6; and decreased.
Why is Carbon important?
Answer:
Carbon is an important constituent of living beings. Along with Nitrogen and oxygen, carbon is one of the essential building blocks of organic life. Carbon forms about 18% of the human body. By organic here I want to stress the fact that it includes every living thing in the world including substances that are produced by living beings. Organic Chemistry, which deals with the study of carbon compounds is a vast repository of information on such compounds. Carbon is integral because of its unique ability to form four different bonds with other elements. This makes it possible for carbon to react with many other elements and form a vast array of compounds.
Hydrocarbons which again is primarily a compound of hydrogen and carbon are the source of all our fossil fuels. ( Fossil Fuels as these fuels are literally formed by fossilized organic matter)
CO2 which again is a carbon compound is responsible for keeping our earth warm and habitable by aiding the greenhouse effect. There are many other such compounds of carbon that are very useful to the earth and living beings.
To conclude carbon in itself is not as essential as its ability to form numerous compounds that are essential for life to exist.
Explanation:
Hope this helps
Despite the best efforts of scientists to create an all-encompassing system of names for relationships between organisms, some still fall in a grey area. Some species of wasp are known as "parasitoids" and not true parasites. These wasps kill caterpillars to reproduce but do not harm any other caterpillars until they need to reproduce again. Why aren't these wasps considered true parasites?
Answer:
Wasps only use the caterpillars when producing offspring which kills the caterpillars.
Explanation:
'True parasites' are generally defined as organisms which live off 'host' organisms of another species at the expense of that organism by harming them in some way. They do this in a variety of ways for different reasons, the most common ones being as a source of food or favorable living conditions. Their lives are almost always entirely dependent on their host. Conventional parasites also usually don't kill their hosts as it is in their best interest that their host stays alive for them to gain the most advantage from them.
Wasps do not fit the true definition of a parasite because:
1. They don't rely on living off the caterpillars to live normally. Wasps are able to find their own sources of food and live on their own without other species. It is only when reproducing that they use and harm the caterpillars.
2. This process kills the caterpillars as the wasp larvae eat them when they emerge and grow which is unconventional for parasites.
It is because of these exceptions that these wasps are classified as 'parasitoids' and not conventional parasites.
Note: Wasps like these have been introduced many times because of this symbiotic relationship they have to help control caterpillar populations.
Hope this helped!
Describe why valinomycin is an effective antibiotic agent
Answer: a naturally occurring depsipeptide used in the transport of potassium
Will give brainliest
Answer:
C, D, E. F
Explanation:
My best guess...
If only one species is considered the 'fittest', why do we still have so many variation among species?
Answer:
Variation occurs in species with the genes resulting in the traits and physical characteristics that make it possible for them to be among the fittest for a number of reasons:
1. Mutation
2. Recombination and
3. Migration
Explanation:
Mutations: A mutation is a deviation from the norm in a DNA sequence. It can be stimulated by errors during the DNA replication process which happens as the cell is dividing, or by exposure to ionizing radiation, chemicals, or viral infection (whether artificial or natural).
It is noteworthy that naturally, without any human intervention, the possibility of a spontaneous mutation is very low.
Recombination: This refers to the creation of new fusion of genes in the offspring that did not occur in the parents by the processes of crossing-over and independent assortment. Independent assortment meaning that the allele the gamete received for one gene was not influenced by the allele received for another gene.
Migration: Variation by migration here refers to the introduction of new genes from into one population by another. This could happen when a new population arrives at an existing one or when an existing one migrates to another population.
We can say for example that, genes from Americans have “migrated” into the population of African origin in America given the continuous immigration of Africans into America.
So in both populations, there are very fit species, but when their genes are mixed during cross-reproduction, variation arises.
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HELP!!! 40PTS!!!!
The distribution of phenotypes in a species can change when changing environmental conditions cause selection to occur. Which of the following best describes evidence that would indicate directional selection is occurring?
A shift in a population's frequency curve from an intermediate phenotype to an extreme phenotype
A shift toward equal distribution of all phenotype frequencies, including intermediate and extreme phenotypes
An increase in the frequency of extreme phenotypes and a decrease in the frequency of intermediate phenotypes
An increase in the frequency of intermediate phenotypes and a decrease in the frequency of extreme phenotypes
Answer:
One of the extreme phenotypes has the highest fitness. The bell curve shifts towards the more fit phenotype.
Explanation:
It's not the exact same as yours but this is the right answer.
The following best describes evidence that would indicate directional selection is occurring is a shift in a population's frequency curve from an intermediate phenotype to an extreme phenotype.
What is directional selection?
Directional selection. In populace genetics, directional choice is a style of herbal choice wherein an intense phenotype is desired over different phenotypes, inflicting the allele frequency to shift over the years withinside the course of that phenotype.
As there the Directional selection is occurring and causing the A shift in a population's frequency curve from an intermediate phenotype to an extreme phenotype.
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What is the food eaten by the organisms used for?
Answer:
Organisms use the stored energy in food to fuel all living processes. Food is organic molecules that serve as fuel and building material for all organisms. The breakdown of food molecules enables cells to store energy and to carry out the many functions of the cell and therefore the entire organism.
Answer:
food eaten by organisms is used for energy that the organism relys on for survival.
Plz help ASAP!! No links or files or you’ll be reported.
Answer: Nephrons eliminate glucose and other waste from the body or option C.
the variety of life and it's process,including the variety of living organisms, the genetic differences among them, and the communities and ecosystem in which they occur is known as
Answer:Biodiversity refers to the variety of life and its processes, including the variety of living organisms, the genetic differences among them, and the communities and ecosystems in which they occur. Scientists have identified about 1.9 million species alive today. ... Most estimates range from 5 to 30 million species.
Explanation:
20 points real answers please and thank you
The picture below shows a satellite image of a sea. (1 point)
Which of these statements is correct about the sea at Location A and Location B?
The waves at Location A are abnormally low.
The waves at Location B are abnormally low.
The waves at Location A move at high speed.
The waves at Location B move at high speed.
Jupiter Saturn Uranus and Neptune are _______ .
Answer:
Are the gas planets
Explanation:
The outer planets are called the jovian planets, meaning huge gas giant. These planets in order are Jupiter, Saturn, Uranus, and Neptune. Pluto comes
In the early 1900s, the Florida panther was found all over Florida. By 1967, the population had dropped to only 30 panthers statewide, and the panther was listed as an endangered species. What is the most likely reason for the decline in the panther population?
A. Florida's climate changed dramatically.
B. Panthers were hunted by humans for many years.
C. The panthers moved north into Georgia and South Carolina.
D. Alligators stopped eating other animals and started eating panthers.
Answer:
B.
Explanation:
Florida's climate itself hasn't particularly changed a bunch, but in the 20th century the population of Florida has increased. Plus D and C are easy to rule out. The easiest explanation for the panther's decline is the fragmentation of their habitat, and human interaction with the environment, not hunting per se. Good news is that the Florida panther's population has gone up to over 100!
Best of luck, and feel free to ask for any clarification.
How are food webs used to help explain ecosystem interactions?
Food webs used to help explain ecosystem interaction as the food web shows the flow of energy from one organism to another.
What is Food web?Food webs have been defined as important conceptual tools for delineating feeding relationships among species within a community, revealing species interactions and community structure, and understanding the dynamics of energy transfer in an ecosystem.
It is defined as a graphical representation of the natural interconnection of food chains and what-eats-what in an ecological community. Food web is also called consumer-resource system.
Example of Food web is Falcon eats snake, which has eaten frog, which has eaten grasshopper, which has eaten grass. A food web shows the many different pathways where plants and animals are connected
Thus, Food webs used to help explain ecosystem interaction as the food web shows the flow of energy from one organism to another.
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1. How would an investigator process patent(direct) prints?
How does biomagnification put a top predator at a disadvantage?*
Answer:
Food is much harder to find the farther up the food chain you go. Toxins and chemicals accumulate in the bodies of everything that was eaten by the food that you eat. Toxins and chemicals bind to the tissue of larger animals better than smaller ones.
Answer:
Explanation:
Toxins accumulate in the bodies of everything that was previously eaten.
What is the muscular system responsible for?
Answer:
The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.
Explanation:
please mark this answer as brainliest
Answer:
Movement
Explanation:
This is correct
Stem cells that are found in the developing fertilized egg after it has formed a blastocyst.
a.) adult stem cells
b.) embryonic stem cells
c.) white blood cells
d.) bone marrow cells
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Several people have to take an ill family member to the doctor to be diagnosed and treated for sickness. Which disease can be treated by taking antibiotics?
a.panic attacks, caused by stress
b. ringworm, caused by a fungus
c. measles, caused by the Paramyxovirus
d. strep throat, caused by Streptococcu s bacteria
A magnified crocodile tongue is an example of multicellular organism true or false
Answer:
true
Explanation:because any living breathing organism is multicellular
Answer:
True
Explanation:
B/c multicellular organisms are cell of living things
By adding the tin atoms to copper, it makes the metal harder to
Helpp??
Answer:
Adding tin to copper during melting changes the properties of the metal. The larger tin atoms restrict the movement of the copper atoms, making the material harder.
Explanation:
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