Answer:
B. The animal's carbon-14 decayed long before the animal died.
Explanation:
The absence of carbon-14 suggests that the isotopes have decayed over time, indicating that the fossil is likely older than the time frame during which carbon-14 is detectable.
Answer:
Without carbon-14, James can use relative dating to estimate the age of the fossil.
Explanation:
Most precipitation
a. evaporates before reaching the ground
b. falls on forests
c. is in the form of snow
d. falls on oceans and lakes
Answer:
a. evaporates before reaching the ground
Explanation:
Answer:
A, evaporates before touching th ground
Explanation:
does anybody know the answer to these?
Answer:
Answer is B if we have the same one
Explanation:
The information presented above suggests that antibiotic resistance is the result of
Answer:
Antibiotic resistance is the result of regular use of same antibiotics for the controlling of harmful microorganisms. Microbes like bacteria got resistance against the medicine used for it and medicine is not helpful in the removal of bacterial disease. When bacteria got resistance against antibiotics, the duration of disease prolonged and sometimes dealth occurs.
Which of the following statements about Australia is true?
A. It is the only former European colony in the Southern Hemisphere.
B. It is the only country that is also a continent.
C. It has the highest average elevation of any country in the world.
D. It is the only country with a mostly desert climate.
Answer:
The statement B. It is the only country that is also a continent, is correct for Australia.
Explanation:
It is a continent due to large mass of land. Australia is derived from a Latin word australis which means southern. Australia is located on the southern part of the world. Australia is surrounded by two oceans i. e. Pacific ocean and Indian Ocean. There are three countries in continent Australia are Australia, New Zealand, and Papua New Guinea.
Which of the following describes asexual reproduction?
fertile offspring despite geographic isolation
one parent organism and no egg or sperm
two parent organisms and genetic exchange
infertile offspring through genetic exchange
Answer: One parent organism and no egg or sperm.
Explanation: Asexual reproduction only needs one parent, and they don't need sex cells.
Explanation:
Asexual reproduction is when single-parent give rise to several offspring, without the fusion of gametes.
One parent organism and no egg or sperm: Asexual reproduction takes place in simple organisms, and these organisms are not able to develop sex cells (egg or sperm).
In asexual reproduction single parent organism divide to produce several offspring and they are genetically identical to their parents as they reproduce without the involvement of another organism.
Hope it Helps!119. Pulmonary gas exchange occurs in the
networks of thin-walled
This exchange takes place using the process of
of the lungs. These are grape-like clusters surrounded by
(2 words)
These are grape-like clusters surrounded by blood capillaries
Explanation:
The alveoli (grape-like structures) are surrounded by a network of blood capillaries. They supply blood for decarbonization and oxygenation. The large network provides a large surface area for this gaseous exchange. In addition, the alveoli are moist to help increase the rate of diffusion of the gases in and out of the blood capillaries.
Describe an example of an octopus learning
Answer: Octopuses and their kin (cuttlefish and squid) stand apart from other invertebrates, having evolved with much larger nervous systems and greater cognitive complexity.
The majority of neurons in an octopus are found in the arms, which can independently taste and touch and also control basic motions without input from the brain.
Octopus brains and vertebrate brains have no common anatomy but support a variety of similar features, including forms of short- and long-term memory, versions of sleep, and the capacities to recognize individual people and explore objects through play.
Explanation:
The greenhouse effect is responsible for which environmental condition listed below?
A) global warming
B) thermal pollution
C) photosynthesis
D) clear cutting of rain forests
Answer:A global warming
Explanation:because the adding of greenhouse gases to the atmosphere increases the warming up.
Soil pollution is a problem only in areas with a lot of farms.
True
False
Answer: False
Explanation:
It can cause problem other places.
Answer:true
Explanation:
Why are oil coal and natural gas not found them evenly distributed on earth?
The amount of oil, coal, and natural gas reserves on Earth is not distributed evenly because the amount of plants and animals buried earlier in sedimentary rock layers determined the amount of oil and gas reserves.
What is the importance of oil and coal?Oil and coal are fossil fuels that are vital to today's society, and they are formed when heat and pressure cause these remains to be transformed into hydrocarbons, which are the main components of oil and natural gas. These sedimentary rock layers are found in areas that were once covered by oceans or seas, such as coastal regions and deltas, and after many years, they become fossil fuels.
As a result, the amount of oil, coal, and natural gas reserves on Earth is not distributed evenly because the amount of plants and animals buried earlier in sedimentary rock layers determined the amount of oil and gas reserves.
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Final answer:
Oil, coal, and natural gas are unevenly distributed because their formation required specific geological conditions that are only found in certain areas. Fossil fuels take millions of years to form and are being depleted much faster than they are replenished, leading to varying degrees of scarcity across different regions of the world.
Explanation:
The uneven distribution of oil, coal, and natural gas on Earth is due to a complex set of geological processes. Fossil fuels are the remains of ancient organisms that were subjected to intense heat and pressure over millions of years. For oil to form, there needs to be just the right biological conditions to produce sufficient plankton, coupled with the correct geologic conditions to preserve and transform this organic matter into petroleum. This process takes a million years or more.
Coal is relatively more abundant and formed from ancient swamp vegetation, while oil and natural gas originated from marine microorganisms. Oil deposits are frequently found in ancient shallow seabeds where organic material was effectively sequestered and transformed over time. Regions like the province of Alberta in Canada are rich in these resources due to their geological history and current explorations are focused on extracting these fuels from tar sands and other reserves.
The extraction and use of these fuels vary; coal is mined and used primarily for electricity generation due to its solid state, while oil and natural gas require different extraction methods, including conventional drilling and hydraulic fracturing. Moreover, due to the accelerated rate of consumption compared to the natural replenishment rate of these resources, they are not only unevenly distributed but also rapidly depleting, underscoring the need for conservation and alternative energy sources.
Fossil fuels are part of which of the following cycles
Answer:
Explanation:
Carbon that is a part of rocks and fossil fuels like oil, coal, and natural gas may be held away from the rest of the carbon cycle for a long time. These long-term storage places are called “sinks”. When fossil fuels are burned, carbon that had been underground is sent into the air as carbon dioxide, a greenhouse gas.
Fossil fuels are part of the carbon cycle.
Explanation:The carbon cycle is the natural process by which carbon atoms circulate through the Earth's atmosphere, oceans, land, and living organisms. It involves carbon dioxide absorption by plants, respiration, decomposition, fossil fuel combustion, and ocean carbon exchange, influencing climate and ecosystems.
Fossil fuels are part of the carbon cycle. The carbon cycle is the process by which carbon is continuously cycled through the Earth's atmosphere, oceans, and land. Fossil fuels, such as coal, oil, and natural gas, are formed from the remains of ancient plants and animals that died millions of years ago. When these fuels are burned for energy, carbon dioxide is released into the atmosphere, contributing to climate change.
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The image below shows a group of meerkats. Meerkats live in habitats that are very dry, hot, and sandy.
Which structural adaptation most likely helps the meerkats survive in their habitats
A.) Meerkats have flexible necks, so they can reach tree leaves for food.
B.) Meerkats have sticky tongues, so they can catch insects to eat.
C.) Meerkats have sharp claws and powerful front legs, so they can dig to get cool.
D.) Meerkats have long, curly tails, so they can climb tall trees
Answer:
i am pretty sure its C
Explanation:
Meerkats are specially adapted to living in the harsh desert environment. Dark patches around their eyes help them be effective lookouts by reducing the glare of the sun, much like a baseball player who paints dark lines beneath his eyes. Their eyes also allow them to take in a wide angle view of the scene. This helps prevent predators from gaining an advantage by sneaking up.
Meerkats also possess special adaptations to help them burrow. Their eyes have a clear protective membrane that shields them from dirt while digging. Their ears also close tightly to keep dirt out.
These are just some fact for them where it says that they dig so probbably it is C.
Which change of state occurs at 0 °C when heat energy has been removed from liquid water? A. boiling B. melting C. freezing D. condensing
Answer:
Melting
Explanation:
After a 25-year. 95% of the ecosystem was covered by melaleuca. What would be the likely impact of this on wildlife population?
Answer:
The trees grow into immense forests, eliminating all other vegetation. They form impenetrable thickets, displacing native vegetation and reducing the
value of habitats for wildlife. Wildlife is down to melaleuca, birds, bats and bees. Biodiversity is reduced.
Explanation:
How does plate tectonics affect climate?
Answer:
Plate tectonic shifts may add heat to the climate as well as increase chemicals such as carbon dioxide and sulfur dioxide.
Explanation: Tectonic shifts causes volcanoes and when erupts volcanoes expel heat and gases into the atmosphere.
Answer:
By changing ocean circulation.
Explanation:
I took the test.
describe the location of the blueprint that determine the structure of each of these forelimbs as the organism develops from embryo to infant
Answer:
The DNA in the nucleus.
Explanation:
The blueprint that contains all of the instructions to "build" and maintain an organism is found in the DNA.
The DNA is the hereditary molecule found in the cell nucleus. The sequence of the DNA determines the expression of genes, which make proteins in the cell. Proteins carry out essentially every function in the cell, including dictating the development of forelimbs.
Therefore, all the information required for the organism to develop is encoded in the DNA.
The location of the blueprint that determines the structure of forelimbs as an organism develops from an embryo to an infant is found in the genetic material within the cells.
These blueprints are known as the homeobox (Hox) genes, which are a group of related genes that control the body plan of an embryo.
During embryonic development, the Hox genes are expressed in a specific spatial and temporal pattern that dictates the identity and position of the developing limbs along the anterior-posterior axis. The Hox genes are located in clusters on particular chromosomes, and each gene in the cluster corresponds to a specific region of the body.
In vertebrates, the forelimbs develop from the lateral plate mesoderm, which forms the limb buds. The Hox genes, along with other signaling molecules such as Sonic hedgehog (Shh), Fibroblast Growth Factors (FGFs), and Bone Morphogenetic Proteins (BMPs), regulate the proliferation, differentiation, and patterning of cells within the limb buds to form the structures of the forelimbs, such as the humerus, radius, ulna, carpals, metacarpals, and phalanges.
The precise regulation of these genes and signaling pathways is crucial for the proper development of the forelimbs. Any disruption in the expression or function of these genes can lead to developmental anomalies or limb malformations.
In summary, the blueprint for the structure of forelimbs is encoded in the Hox genes, which are part of the organism's genome. These genes interact with various signaling pathways during embryonic development to direct the formation of the limbs, ensuring that the correct structures develop in the appropriate locations.
Some scientists believe that global warming will bring about extreme weather.
Please select the best answer from the choices provided
ОО
T or F
Answer: True
Explanation:
Over past decades the scientists have found evidence that indicates that the increase in the change of climate may lead to an increase in the frequency and intensity of the events. This may contribute to the events like extreme heat, rainfall and can even lead to disastrous events like hurricanes.
For other events like tornadoes, drought periods the evidences like little or no rain have been found.
The scientists have also found that the change in the global average temperature is because of human influence. Climatic attribution has been developed so that the scientists can identify and quantify that can measure the human-caused climatic changes resulting in the extreme weather.
How do organisms living in the intertidal zone use byssal hair?
A. As a net to help capture food
B. As an anchor against tidal action
C. As protection against harsh sunlight
D. As a filter to remove salt from water
Answer:
B) As an anchor against tidal action
Explanation:
Byssal hairs (or threads) are used to anchor organisms to rocks and other solid surfaces to protect them from wave shock (tidal action).
These hairs/threads stretch out in many directions to hold the organism in place. Mussels are an example of an organism that uses byssal threads.
[This answer was pasted from another question I also answered. You can find it here: https://brainly.com/question/12319732 As I said, the original answer was also written by me.]
Answer: It’s B
Explanation:
A landscaper sprays a lawn with a pesticide that is 96% effective. If there are around 50 grasshoppers living on the lawn before the pesticide application, how many are likely to survive the pesticide?
A) 0
B) 2
C) 5
D) 10
Answer:
10
Explanation:
10
While viewing a water sample under a microscope, you observe a single cell. Which of the following observations could you use to
determine if the cell is prokaryotic or eukaryotic?
A.
The cell contains genetic material.
B. The cell contains cytoplasm.
C. A flagellum is present.
D.
The contents are surrounded by a cell wall.
E.
The cell's DNA is encapsulated in a nucleus.
Reset
Submit
Answer:
E. The cell's DNA is encapsulated in a nucleus.
Explanation:
There are no membrane bound organelles present in a prokaryotic cell. Nucleus is a membrane bound organelle so it is absent in a Prokaryotic cell so it is an evidence that cell is Eukaryotic cell.
While other features mentioned in the question are common both in prokaryotic and eukaryotic cell.
how much of the ocean is discovered
Answer:
5%
Explanation:
Just 5 percent of Earth's oceans have been explored and charted – especially the ocean below the surface.
Which statement correctly describes how a protein is formed.
A- Amino acids are bonded together in a long chain to form a new molecule.
B- A monosaccharide bonded to a side chain is broken apart.
C- A molecule containing glycerol bonded to three fatty acids is broken apart.
D- A nitrogenous base, a sugar, and a phosphate group combine to form a new molecule.
12. Compare a plant and animal cell?
(I NEED THIS ANSWERED QUICKLY! I WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER!)
An earthworm is moving at a rate of 1 centimeter per second while traveling in a straight line. Therefore, the earthworm's motion is an example of _____. A. speed only B. velocity only C. both speed and velocity
Answer:
A. speed
Explanation:
Adélie penguins and crabeater seals both feed on krill.
Which term best describes the relationship between Adélie penguins and crabeater seals?
parasitism
competition
mutualism
predation
Answer: competition
Explanation:
Since adélie penguins and crabeater seals feed on the same organism, krill, they would compete for the most kill all the time. This relationship is known as competition.
Furthermore, since adélie penguins and crabeater seals are predators and are of different species, the competition is known as inter-specific competition.
♡ The Question ♡
-Adélie penguins and crabeater seals both feed on krill.
Which term best describes the relationship between Adélie penguins and crabeater seals?
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♡ The Answer ♡
-Competition!
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♡ The Explanation/Step-By-Step ♡
-No Explanation/Step-By-Step provided!
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♡ Tips ♡
-No tips provided!
<. INICOUNIC
• Group 6 Match the synapse to the receptor type in effector cells
26. Neuromuscular junction
Adrenergic
27. Parasympathetic effector synapse
Muscarinic
28. Sympathetic effector "synapse"
Nicotinic
Neuromuscular junction - Nicotinic
Parasympathetic effector synapse - Muscuranic
Sympathetic effector "synapse" - Adrenergic
Explanation:
Neurotransmitters transmit the electric signal from the neuron to another neuron or an effector cell which is the target cell like the muscles or the glands. Receptors are transducers which connect with the external and internal environment and carry the nerve signals.
The neuromuscular junction refers to the synaptic connection between a nerve cell and a muscle cell. The primary receptor at the neuromuscular junction is the nicotinic acetylcholine receptors which respond to acetylcholine neurotransmitters.
The parasympathetic nervous system works with muscuranic receptors which are activated by acetylcholine. These receptors transducts the neurosignals (chlorinergic) in the parasympathetic end organs.
The sympathetic nervous system is associated with the adrenergic receptors and activated by epinephrine or norephinephrine and controls blood flow in the vessels.
31. Which process is used to produce beer and wine?
a. lactic acid fermentation
b. glycolysis
c. alcoholic fermentation
d. the Krebs cycle
The alcoholic fermentation process is used to produce beer and wine.
Option: C
Explanation:
Answer:
alcoholic fermentation
Explanation:
Janet is studying a population of genetically-identical individuals. Janet can conclude that these organisms ____?
A. do not reproduce.
B. reproduce asexually.
C. reproduce sexually.
D. are multi-cellular.
Answer:
B. reproduce asexually.
Explanation:
Janet can conclude that these organisms reproduce asexually. So, the correct option is B.
What is Asexual reproduction?Asexual reproduction refers to a type of reproduction where a child is born to a single parent. The newly created people are copies of their parents since they have the same genetic makeup and physical characteristics.
Both multicellular or unicellular species can reproduce asexually. There will be no gamete fusion involved in this procedure, as well as the number of chromosomes will remain the same. With the exception of specific situations where there is a possibility that a rare mutation will occur, it will inherit the very same genes as the parent.
Therefore, the correct option is B.
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predict what happens when a cell is placed in a solution with an equal concentration of water outside the cell and inside the cell.
Answer: Nothing will happen.
Explanation: When a cell is placed in a solution with an equal concentration of water outside the cell and inside the cell, there will be no movement of water molecules across the cell membrane. There will be no osmosis because the solution inside the cell and the solution outside the cell are isotonic, this means that they have equal concentration. The two solutions are in equilibrium, therefore there will be no movement of water molecules across the cell membrane. For osmosis to occur there must be different between the water concentration in the two environments.
How many genes influence a polygenetic trait?
A: one gene
B: more than one gene
C: zero genes, just the environment
D: one gene with multiple alleles
Answer: B: more than one gene
Explanation: A polygenic trait is a trait that is influenced by more than one gene. Every trait is controlled by at least one pair of gene. When a trait is controlled by one gene, it is called a monogenic trait but when a trait is controlled by more than one gene, it is called a polygenic trait. Polygenic traits do not obey mendelian pattern of inheritance and they involve the interaction of multiple genes. Examples of polygenic traits in humans are hair colour, eye colour, skin colour.
Answer:
B
Explanation: