Answer:
digestive system
Explanation:
The accessory digestive organs are the tongue, salivary glands, pancreas, liver, and gallbladder.
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Three different reptile skulls with a common ancestor show that the skull changed from having no holes behind the eye to having one hole, and then two holes behind the eye.
What conclusion did scientists draw about the reptile?
Answer:
the skull evolved as the aw got stronger
Explanation:
Answer:
A) The skull evolved as the reptile developed stronger jaws.
*Edge 2021* Did the exact quiz!!
Part 1: Below is a pedigree that is used to trace sickle cell anemia in a family. Analyze the pedigree and answer the following questions. Use the key to help you answer the questions. Carriers have not been marked.
Which are characteristics of leeches? Check all that apply.
A. They are parasitic.
B. They are a type of roundworm.
C. They have setae.
D. They have medical uses.
E. They are segmented.
Darwin was pilloried for his theory of evolution through natural selection. ("Pillory" is a big word from the 19th century; it wasn’t nice.) He has been dead for a while now, and thus doesn’t care. But his idea is still the basis of debate today. Science supports most of his theory. Describe, briefly, the central principles of Darwin’s Theory of Evolution through Natural Selection.
Answer:
The central principle of Darwin theory is based on the fact that,
He observed that in a given population,organism usually produced more offspring than than they can naturally capable of taken care of to replace the parents population.And this leads to increase in large population.
Despite this large population the natural population remain stable over a long period of time.
Because in this population organisms compete for needed resources for survival, thus certain organisms with special characteristics or traits were able to for survive better, and therefore get the natural resources, and resist the selection pressure while others which can not, will be removed from the population. Hence there is competitions for the natural resources,
Therefore organisms that survived were better adapted, because they must have inherited the survival traits or genes from their parents. This surviving traits is caused by variation.And is is responsible for their better adaptation and survival in the population.
A s this continues the population of the survived organisms will dominates,This is because these organism are naturally selected by nature, and able to resist the selection pressure.
They are known as the survival of the fittest, and their selection advantages due to variation (caused be mutation) is responsible for their dominating population and natural selection compare to the less selected ones.
Explanation:
Please help me I put 25 points
Explanation:
SORRY I AM NOT SURE
Which of the following reproduces by injecting its material into a
host cell? *
Parasite
Virus
Bacterium
Microorganisms
The answer is Virus because they latch itself onto the host
A major disturbance that the ecosystem was able to recover completely from. ___________________________________________________________________ A major disturbance that caused the ecosystem to stabilize at a new equilibrium. ___________________________________________________________________ A major disturbance that caused the ecosystem to completely collapse. ___________________________________________________________________
Complete Question:
I made the grass diseased. This caused all of the populations above it (rabbit, snake, and hawk) to rapidly decrease over the 12 month period
(a) A major disturbance that the ecosystem was able to recover completely from __________
(b) A major disturbance that caused the ecosystem to stabilize at a new equilibrium ____________
(c) A major disturbance that caused the ecosystem to completely collapse __________
ANSWER:
(a) reducing the hawks to nearly zero
(b) removing all of the hawks
(c) removing all the diseased.
Explanation:
(a) reducing the hawks to nearly zero will cause low depletion of the producer (plants) and this will allow the plant to grow (without visible depletion) over a period of time.
(b) for the ecosystem to stabilize at a new equilibrium, the tertiary consumer (hawks) will be totally removed from the ecosystem. Since there's no tertiary consumer to checkmate the density of other components of the food chain, it will make it form a balanced ecosystem.
(c) for ecosystem to collapse, it's important to note that the removal of the producer (plants) will be bring about the loss of the ecosystem. Since, their is no manufacturer of food, the primary consumer (rabbit) in the food chain will be starved and overtime the rabbits will be wiped out and this will caused the loss of secondary and tertiary consumer in the long run.
The ecosystem is defined as the geographical area, in which animals, microbes, plants, along abiotic components live together to maintain equilibrium.
The correct blanks for the given statements are:
(a) reducing the hawks to nearly zero
(b) removing all of the hawks
(c) removing all the diseased.
The statements can be explained as:
(a) The reduction of hawks to zero will result in the depletion of plants or producers, and it will lead to the growth of the plants over a period of time.
(b) The ecosystem will be stabilized at a new equilibrium, the tertiary consumer or hawk if totally removed from the ecological niche.
(c) The ecosystem will be collapsed if the producers or the autotrophs deplete or vanish. The manufacturing of food will be halted and consumers dependent on producers will die and resulting in the collapse of the ecosystem.
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What is the role of DNA in transmitting genetic information? Describe DNA’s important genetic role in few sentences below.
Explanation:
DNA is a nucleic acid molecule that is composed of nucleotides. The nucleotide is composed of four different types of nitrogenous bases, a phosphate group, and the deoxy-ribose sugar.
The DNA molecule is used by the organism to store the information of organisms for a long time. The nitrogenous base in the DNA codes for different types of amino acids in the organism which can form proteins. The proteins can perform various roles in the organism. The DNA molecule is transmitted through reproduction in the organism.
QUESTION 5
What is a stem cell?
O A. a hollow, fluid filled ball of cells
OB-a cell that can give rise to more cells of its kind, along with at least one specialized cell
o C. an exact genetic copy
O D.a cell that can give rise to other types of cells
Answer: B
Explanation: I would say that it is B because when i looked up the definition it said that the stem cell was able to give arise to more cells of the same type but i might be wrong.
The bones in the wings of a bat are the same as the bones found in the paws
of raccoon, though their function is quite different. The similarity is evidence
that the bat and the raccoon-
Answer:
the bat and the racoon share a common ancestor.
Explanation:
what is described in this question are homologous structures, which indicate common ancestry. hope this helps!
The bones in bat wings and raccoon paws serving as homologous structures indicate a common evolutionary ancestor. Conversely, analogous structures like bat and insect wings evolved independently through convergent evolution.
Explanation:The question is exploring the concept of homologous structures, which is a fundamental idea in comparative anatomy and evolutionary biology. The similarity in skeletal structures between the wings of a bat and the paws of a raccoon indicates that they share a common evolutionary ancestor, despite the different functions their limbs have evolved to fulfill. This indicates a common evolutionary past and is evidence of divergent evolution, where related species evolve different traits.
In contrast, structures that are similar in function and appearance but do not share an origin in a common ancestor, like the wings of bats and insects, are called analogous structures. These arise through convergent evolution, where similar environmental pressures result in similar solutions in unrelated lineages.
Some areas of an ocean are known as dead zones. These zones form when excess organic material decomposes. This increased decomposition uses up the oxygen from the water. Which human activity is most affected by the increasing number of dead zones in the ocean?
A.
Offshore oil drilling, because water in dead zones is toxic
B.
Commercial fishing, because fish cannot survive without oxygen
C.
Commercial shipping, because dead zones change the course of ocean currents
D.
Sand mining, because oxygen is not available to form the sands on ocean beaches
The human activity that should be most affected by the rising no of dead zones should be option b.
What is commercial fishing?It is the activity where the fish should be caught out also the other seafood for the commercial food.
In the case when it gives the large number of quantity of food with respect to the various countries that should be around the earth.
hence, we can conclude that The human activity that should be most affected by the rising no of dead zones should be option b.
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The correct option is B i.e. Commercial fishing, because fish cannot survive without oxygen
Commercial fishing is most affected by the increasing number of ocean dead zones because fish cannot survive in areas depleted of oxygen. Dead zones are caused by eutrophication and human activities such as fertilizer runoff.
A dead zone is a section of a freshwater or marine ecosystem where a significant portion of the native vegetation and animals has disappeared. Eutrophication, oil spills, the disposal of hazardous substances, and other human activities can all result in these zones. There were more than 400 dead zones in existence as of 2008; this number has been rising for a while. Fertilizer runoff from the Mississippi River basin has generated a dead zone spanning over 8,463 square miles in the Gulf of Mexico off the coast of the United States, which is one of the worst dead zones in the world. The Chesapeake Bay in the eastern United States is one of the lake and bay ecosystems that are badly impacted by fertilizer runoff containing phosphate and nitrate.The human activity most affected by the increasing number of dead zones in the ocean is commercial fishing because fish cannot survive without oxygen (Option B).In a rainforest food chain, caterpillars and butterflies eat orchid plants. Toucans eat the caterpillars and butterflies. Leopards eat the toucans.
Which statement describes the energy in this food chain?
Answer: it’s C
Explanation:
Answer:c
Explanation:
Question 5 (1 point)
What best describes the role of transpiration in plants?
Producing food molecules
Capturing the energy in sunlight
Maintaining water balance
Breaking down food molecules
Answer:
maintaining water balance
A large power point burns coal to generate electricity for nearby homes and businesses.
This contributes most directly to which short-term human-induced envrionmental change?
Answer:
Pollution
Explanation:
Burning of coal contributes most directly to an environmental change described as pollution.
Pollution is generally defined as the presence of substance in the environment at a level that disrupt the normal biotic functioning of the environment. Pollutants are substances whose level of concentration in the environment affects the normal biotic functioning of the environment.
The burning of coal leads to the release of harmful substances to the environment. These substances could be in form of gases such as oxides of carbon, sulfur and nitrogen that are capable of causing acid rain and global warming, heavy metals such as mercury and lead, as well as particulate matters.
Heavy metals are harmful to organisms when they find their ways into the food chains while particulate matters in the atmosphere reduce visibility and are capable of causing damages to properties when they are deposited on them.
Ashes remains from coal burning are also capable of causing pollution to nearby lakes and water bodies when they are washed down. This will lead to the disturbance of lives in the aquatic environment and decrease the quality of the water bodies for various uses.
Genetic flow is the transfer of __________ from one population to another.
Gene flow is the transfer of genetic information between populations through breeding, leading to the exchange of genes and introduction of new genetic variation.
Genetic flow, or gene flow, is the transfer of genetic information from one population to another. This process occurs when populations of the same species breed with one another, leading to an exchange of genes across population boundaries. In essence, gene flow is the migration of alleles or genes due to the movement of individuals or gametes (e.g., pollen, seeds) between populations.
An example of gene flow is when plants from one population send their pollen via wind, insects, or birds to another population, leading to cross-pollination and the introduction of new genetic material. Similarly, when male lions leave their pride to join another, they bring new genetic variation to that group. Thus, gene flow can introduce new genetic variation into a population and is considered an important force in evolution.
The Meselson-Stahl experiment provided the first experimental evidence that: A. Newly synthesized DNA in E. coli has different nucleotide sequence than the parent DNA. B. DNA synthesis in E. coli proceeds by a conservative mechanism. C. DNA polymerase is required for DNA synthesis. D. DNA synthesis in E. coli proceeds by a non-conservative mechanism. E. DNA synthesis requires dATP, dCTP, dGTP, and dTTP. F. DNA synthesis in E. coli proceeds by a semi-conservative mechanism.
Answer:
the answer is a
Explan:
biology work im selling points pls help 50 points
Answer:
^^^ SHES CORECT IT IS "Answer: The last choice, Gravitational Pull would become weaker and weight would decrease because when out of Earth's atmosphere, objects (also animals & humans) are able to float because there isn't really a gravitational pull, and because there isn't a gravitational pull, the weight changes and it is less than it was before. But mass never changes."
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Explanation:
Once DNA was shown to be the primary genetic material of life, a race among scientists took place to work out its structure. Which concept came from studying the amounts of each DNA base in different organisms?
Final answer:
The concept that came from studying the amounts of each DNA base in different organisms is base composition, which led to the discovery of Chargaff's rules.
Explanation:
The concept of studying the amounts of each DNA base in different organisms is known as base composition. Base composition refers to the relative proportions of the four DNA bases (adenine, thymine, cytosine, and guanine) in a DNA molecule. This concept was crucial in understanding the physical structure of DNA and how it accounts for the genes in different organisms.The study of base composition led to the discovery that the amount of adenine is roughly equal to the amount of thymine, and the amount of cytosine is roughly equal to the amount of guanine in a DNA molecule. This is known as Chargaff's rules. Different species have different percentages of each base, which contributes to the genetic diversity across organisms.When you drop a rubber ball, gravity pulls the ball to the floor. When the ball hits the floor, it becomes
deformed and stores some of the energy it had. This energy helps the ball bounce back. What sequence
describes these energy changes?
O
A. kinetic
potential - kinetic
potential
O
B. potential - kinetic
potential - kinetic
O
C. potential - kinetic → thermal
potential
D. thermal
kinetic
potential
kinetic
Final answer:
The correct sequence of energy changes when a rubber ball is dropped and bounces is gravitational potential energy to kinetic energy, then to a mix of potential and kinetic energy during deformation, and back to kinetic energy as it bounces, losing some energy as heat.
Explanation:
When you drop a rubber ball, it undergoes a series of energy transformations. Initially, the ball has gravitational potential energy due to its height. As it falls, this potential energy is converted into kinetic energy. When the ball hits the floor, it becomes deformed, temporarily storing energy, some of which is elastic potential energy (like the energy in a spring) and some of which is thermal energy due to friction and the deformation process. As the ball bounces back, it reconverts its elastic potential energy into kinetic energy, which is then converted back into gravitational potential energy as it rises. However, not all energy is perfectly conserved in its original forms; some is dissipated as thermal energy due to friction and deformation, explaining why the ball does not return to its original height. Consequently, the correct sequence that describes these energy changes is B. potential - kinetic - potential and kinetic - potential and kinetic - kinetic - potential.
Which of these diseases can be treated with antibiotics?
*Lyme Disease
*The common cold
*Influenza
Answer:
The answer would be the Lyme Disease. This is because the common cold and influenza can't be treated with antibiotics.
Why is the movement of basic elements in
ecosystems different from the transfer of
energy?
Answer:
Chemical nutrients and energy tend to flow in the same direction for most of an ecosystem. The big difference is that the chemical nutrients are ultimately recycled in the ecosystem while the energy is ultimately lost from the ecosystem to the universe at large. Energy in any ecosystem ultimately comes from the Sun
Explanation:
While energy passes through the biosphere and can never be regenerated, elements may. This makes the movement of nutrients through the biosphere distinct from the transfer of energy.
What is the movement of basic elements in ecosystems?
The main distinction is that while the energy is ultimately lost from the ecosystem to the larger universe, the chemical nutrients are ultimately regenerated in the ecosystem.
Energy changes forms as it flows through an ecosystem, but no new energy is produced.
Similar to how matter cycles throughout an environment, no new matter is created as atoms are rearranged into other molecules. As a result, energy and matter are preserved throughout all ecosystem processes.
Therefore, the movement of basic elements in ecosystems, different from the transfer of energy.
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Why do moss grow so low to the ground?
A. They only get nutrients from the soil.
B. They like it like that.
C. They lack vascular tissue and require water for reproduction.
D. They can't photosynthesis enough energy to grow tall.
Answer:
c
Explanation:
MULTIPLE CHOICE QUESTION
True or False? Nerve cells are stem cells.
Halse
Answer: True You're Welcome
Explanation: Because when I looked the question up on google it said stem cells can turn into nerve cells.
Please use the following case for questions.
You are at your son’s baseball game when another boy’s dad experiences dizziness and nearly faints in the stands next to you. You tell him that you are a paramedic and will walk him to your car where you have your medical equipment. He reports that he has had a headache off and on since he had a tooth extracted four days ago. This evening he is feeling very weak. His blood pressure is normal. When you listen to his heart you note that he has a pronounced murmur. He reports having had rheumatic fever 15 years ago. You examine his fingernails and find one that has tiny petechial hemorrhages under it.
1. Which cardiovascular infectious condition is this?2. What is the most likely causative organism and the route of transmission?3. What the connection, if any with rheumatic fever?4. Why did you look at his fingernails?5. What type of culture would a physcian most likly order and why?
Answer:
Explanation:
a) the cardiovascular condition is sabacute endocarditis
b) It is caused by a type of streptococcus called streptococcus viridians and transmitted through the opening of the wound
c) rheumatic fever can lead to damage to the heart and this damage allows bacteria to attach itself to the heart. Streptococcus viridians are often caused by bacteria hence there growth can be favorite by rheumatic fever.
d) the nails is used to check the blood stream, and should be check for capillary heamorrhage
e) He would order for BAP- Bacteria Agar plate that is used mostly to classic streptococcal bacteria.
Are there granules in all cells
Answer:
no, not all cells
Explanation:
some white blood cells don't have granules in their cytoplasm, agranulocytes lack granules.
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Use the drop-down menus to select the storm that causes each environmental hazard.
Flash flood
Storm surge
Answer:
1. Thunderstorm
2. hurricane
Explanation:
Answer:
thunderstorm, hurricane
Explanation:
he or she above is right
Indicate whether the following statements are true or false. If a statement is false, explain why it is false. A. Generally, the total number of nonpolar amino acids has a greater effect on protein structure than the exact order of amino acids in a polypeptide chain. B. The "polypeptide backbone" refers to all atoms in a polypeptide chain, except for those that form the peptide bonds. C. The chemical properties of amino acid side chains include charged, uncharged polar, and nonpolar. D. The relative distribution of polar and nonpolar amino acids in a folded protein is determined largely by hydrophobic interactions, which favor the clustering of nonpolar side chains in the interior.
A. False. The order in which amino acids are linked is unique for each protein and isthe most important factor in determining overall protein structure.
B. False. Peptide bonds are planar amide bonds that are central to the polypeptide
backbone formation. The atoms in the amino acid side chains are not considered
to be part of the backbone.
C. True.
D. True.
A. The total number of nonpolar amino acids has not a greater effect on protein structure than the exact order of amino acids in a polypeptide chain is the false statement.
B. The atoms that form peptide bonds (which are a component of the backbone) and the atoms that link them are collectively referred to as the "polypeptide backbone". This backbone is made up of N-C-C.
C. The chemical properties of amino acid side chains having charged, uncharged polar, and nonpolar is the true statement.
D. The relative distribution of polar and nonpolar amino acids in a folded protein which is determined largely by hydrophobic interactions is the true statement.
Therefore, the correct options for A, B, C and D are False, False, True and True respectively.
The structure and function of a protein are influenced more by the particular amino acid sequence in its polypeptide chain than by the total amount of non-polar amino acids. "Polypeptide backbone" includes the N–C–C backbone as well as the atoms that bind to peptide bonds to generate them.
Amino acid side chains can be classified as having charged, uncharged polar or non-polar groups and exhibit a variety of chemical characteristics. Protein folding is fundamentally influenced by hydrophobic interactions, which cause nonpolar amino acids to assemble inside the protein, thereby improving stability and structure.
Therefore, the correct options for A, B, C and D are False, False, True and True respectively.
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Mutations that neither benefit nor harm the organism hav
effect on the organism's survival.
a positive
a negative
an aggressive
a neutral
Answer:
A neutral.
Explanation:
Mutation: It is defined as any alteration that occurs in the nucleotides sequence of organisms. It can be beneficial, harmful, and neutral.
A neutral mutation: It is defined as the no harmful and no beneficial effect on the survival and reproduction of organisms. Some examples of neutral mutations are humans with webbed toes, frog having an extra leg, and white kermode bear.
What percentage of the weeds growing in 1984 were chicory ?
Answer:
27%
Explanation:
predict the effect of a mutation that prevents the expression of aurka on a normal (noncancerous) cell
A mutation that prevents the expression of aurka in a normal cell would likely disrupt proper mitosis, leading to issues like aneuploidy. This can trigger cell cycle arrest or apoptosis, but may also prevent cancer if other cell cycle checkpoints are functional.
To predict the effect of a mutation that prevents the expression of aurka on a normal cell, we need to consider the role of AURKA (Aurora kinase A) in cell division. AURKA is necessary for proper mitotic progression, including the alignment and separation of chromosomes during metaphase and anaphase. If AURKA expression is inhibited, it would likely lead to problems with mitosis.
AURKA acts as a key regulatory protein during cell division, ensuring that cells correctly duplicate and segregate their chromosomes. Without this regulation, it is possible that cells could undergo faulty cell division, leading to aneuploidy, where cells have an abnormal number of chromosomes. This can cause cell cycle arrest, apoptosis, or potentially lead to tumorigenesis if other checkpoints fail.
However, in a noncancerous cell, the inactivation of AURKA may activate DNA damage responses or cell cycle checkpoints that prevent the cell from dividing, and thereby reduce the risk of cancer development.