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explain reproduction in snail
Take a moment to examine these images of cells and their surrounding membranes. You already know that the cell membrane protects the cell from the external environment and controls what substances enter and exit the cell. As you study the pictures, consider the following questions: Which of the two cells do you think is more efficient at transporting materials through the cell? Why?
Answer:
The bigger cell would be more efficient at transporting because the surface area of the cell membrane is larger. This will allow cellular transport to occur at a faster rate, compared to the other cell.
Answer:
The bigger cell is more efficient at transporting because the surface area of the cell is bigger which is good for transporting
Describe the action of cocaine at a synapse
Answer:
dopamine transporter, blocking the removal of dopamine from the synapse. Dopamine then accumulates in the synapse to produce an amplified signal to the receiving neurons
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Answer:
Erosion and gravity
Explanation:
Erosion weathers away rock and sediment and moves it to a different location. gravity moves broken pieces of rock and sediment downslope.
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2. Which object is part of climate
A river
B. bacteria
Coisture
Answer: I think it is B
Explanation:
if all living things contain dna why does each living thing look differently
good morning.
what is photosynthesis?
Answer:
is the process by which plants use sunlight water and carbon dioxide to create oxygen and energy in form of sugar
Frameshift mutation are the result of what occurrence?
Explanation:
A frameshift mutation (also called a framing error or a reading frame shift) is a genetic mutation caused by indels (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three. Due to the triplet nature of gene expression by codons, the insertion or deletion can change the reading frame (the grouping of the codons), resulting in a completely different translation from the original. The earlier in the sequence the deletion or insertion occurs, the more altered the protein. A frameshift mutation is not the same as a single-nucleotide polymorphism in which a nucleotide is replaced, rather than inserted or deleted. A frameshift mutation will in general cause the reading of the codons after the mutation to code for different amino acids. The frameshift mutation will also alter the first stop codon ("UAA", "UGA" or "UAG") encountered in the sequence. The polypeptide being created could be abnormally short or abnormally long, and will most likely not be functional.
Two differences between primary and secondary metabolites
Answer:
Image result for Two differences between primary and secondary metabolites
Primary metabolites are not species-specific and thus might be identical in some organisms. Secondary metabolites are species-specific and thus are different in different organisms. Primary metabolites are involved in the growth, development, and reproduction of organisms.Aug 18, 2020
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Answer:
least specific- Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species - most specific
Explanation:
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Hey,Daily Check up are you okay? :)
Answer:
im actually doing really bad but i mean, thats life.. how are you?<3
Explanation:
What is toxicity testing? (3 sentences or longer)
Answer:
Toxicology testing, also known as safety assessment, or toxicity testing, is the process of determining the degree to which a substance of interest negatively impacts the normal biological functions of an organism, given a certain exposure duration, route of exposure, and substance concentration
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What is meant by obesity?
Answer: The condition of being grossly fat or overweight.
Brainliest please?
Answer:
Obesity is a disease that people have when they have extra body fat.
Explanation:
obesity is not only a physical problem but it is also a medical problem. when you are obese you are prone to have heart problems. The diseases that are caused by obesity can range anywhere from heart disease to certain types of cancers.
functions of the fine cytoplasmic filaments
Answer:
Striated, smooth, and cardiac muscle cells contain vast numbers of cytoplasmic filaments that function during the contraction of these cells. ... The contraction of striated muscle cells shortens the muscle, which then moves the skeleton.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!
What is the difference between national legislation and international treaties
Answer:
The main difference between international and national law is that international law regulates external relations between two or more countries by the signing of treaties and agreements concerning trade, war, the sea or oil, whilst national law or domestic law is applied within the boundaries of a country
11.Explain why the newly created bacteria are considered genetically modified
Answer: Genetically modified bacteria are used to produce large amounts of proteins for industrial use. Generally the bacteria are grown to a large volume before the gene encoding the protein is activated. The bacteria are then harvested and the desired protein purified from them.
Explanation:
In the presence of oxygen, _____ molecules of ATP can be formed during cellular respiration.
A. 36 to 38
B. 19 to 24
C. 2 to 4
D. 63 to 68
E. 38 to 42
Answer:
A
Explanation:
Answer:
A. 36-38
Explanation:
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In order for a neuron to receive and transmit a message it must be in a polarized state. While in this rest state there are more sodium ions outside the cell membrane while potassium is prevalent inside the cell. This causes the neuron to maintain a neutral charge. Once the action potential arrives at its [ Select ] , a nerve cell will shuttle the message down its own axon and to the next neuron via its [ Select ] . This impulse will cause the cell to become [ Select ] and will effectively change the charge of the neuron to a [ Select ] charge. After sodium rushes into the cell, the potassium will rush out in order to [ Select ] . Once the impulse reaches the axon terminal, it is [ Select ] that stimulates a [ Select ] to continue the message to the next neuron. The neuron then undergoes a [ Select ] when all ions are repositioned with help of the
Answer:
The process of nerve impulse transmission by means of an action potential involves the processes of depolarization, repolarization, hyperpolarization and restoration of resting memebrane potential.
Explanation:
In order for a neuron to receive and transmit a message it must be in a polarized state. While in this rest state there are more sodium ions outside the cell membrane while potassium is prevalent inside the cell. This causes the neuron to maintain a neutral charge. Once the action potential arrives at its dendrites, a nerve cell will shuttle the message down its own axon and to the next neuron via its axon terminal. This impulse will cause the cell to become depolarized and will effectively change the charge of the neuron to a poositive charge. After sodium rushes into the cell, the potassium will rush out in order to restore its resting memebrane potential. Once the impulse reaches the axon terminal, it is used to open voltage- gated calcium channels releasing calcium ions that stimulates a neurotransmitter to continue the message to the next neuron. The neuron then undergoes a repolarisation when all ions are repositioned with help of the voltage-gated ion channels.
Compare how natural selection selects for organisms with beneficial traits over those with less beneficial traits for an environment.
Natural selection is the process by which animals adjust to their environments.The environment affects natural selection. Natural selection does not prefer characteristics that are better in some fundamental way.
Natural selection is a process that favors heritable characteristics that boost an organism's chances of survival and enable additional reproduction.
What decides which features are adaptive during the course of natural selection?
In evolutionary biology, we decide which qualities in an organism are adaptive (caused by natural selection) and which are non-adaptive or spandrels by examining whether or not that particular trait was something that arose for its current purpose would be an adaptation.
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what is one way in which energy differs form nutrients?
A. producers do not need energy
b. energy is never recycled
c. nutrients are never recycled
Answer:
B. Energy is never recycled.
Explanation:
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 recycled in the ecosystem while the energy is lost from the ecosystem to the universe at large. Energy in any ecosystem comes from the Sun.
PLZZZ HELP
Task: Should chemical reactions be manipulated in order to meet our food and fuel needs ?
Plz explain a little bit
Explanation:
I think this is the answer
The ability to control chemical processes is increasingly being used to provide the food and fuel we require.
What are the reactions to making food?Lipid oxidations, chain reactions that lead to rancidity in foods containing oil and fat, and non-enzymatic browning reactions involving amines.
Reducing sugars are the most significant chemical process in food systems. Growing requires more than simply the bare necessities of water and sunlight.
In truth, sunshine, carbon dioxide, water, soil organisms, and nutrients are the five main components that affect how effectively your plants or crops will grow.
Therefore, in order to meet our food and fuel needs chemical reactions can be manipulated.
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a. What is found in the troposphere?
Answer:
the troposphere contains three-quarters of the mass of the entire atmosphere. The air here is 78% nitrogen and 21% oxygen. The last 1% is made of argon, water vapor, and carbon dioxide.
Explanation:
Plant cells use CO2 and H2O to make
A. chlorophyll
B. new cells
C. glucose
D. an ovule
Answer:
c.
Explanation:
Plants use CO2 and H2O to make glucose through photosynthesis
In 1859, Charles Darwin proposed that differential survival and reduction of individuals would produce changes in species population over time. In other words, the environment acting on variation of individuals within a population would result in an adaptation (an evolutionary process that results in morphological, physiological or behavioral changes at the population level and that increases the probability of the members of that population to survive and their reproductive success). Using a specific example, explain how natural selection explains the theory of evolution. Also include in your explanation and within your example, what are the 4 factors needed for natural selection to act
Answer:
Reproduction, heredity, variation in fitness or organisms.
Explanation:
Evolution occurs in organisms due to natural selection process because natural resources are limited. Evolution is the change in the characteristics of a species over several generations. If evolution occurs in the organisms so these evoluted organisms can survive rate more than those organisms where no evolution occurs because the evoluted organisms can adopt successfully the features of environment. Reproduction, heredity, variation in fitness or organisms are the four factors needed for natural selection to act.
2- Clasifica los siguientes sistemas en abierto, cerrado o aislado:
a. una cazata de helado c. una lata de arvejas e. un vaso con jugo
b. una bolsa de 1kg de arroz sin abrir d. un termómetro f. un perro
3- Clasifica los siguientes sistemas en homogéneo y heterogéneo e indica el número de fases:
a. limonada con hielo c. agua y aceite e. agua gasificada
b. agua y acetona d. tierra, arena y piedras f. café con leche
4- En un laboratorio se realiza un experimento para estudiar la flotabilidad de cuerpos
en el agua.
a. Indica qué partes componen el sistema y cuál es el ambiente.
b. Clasifica el sistema como abierto, cerrado o aislado.
c. ¿En qué estado físico está cada componente del sistema?
d. ¿Cuántas fases tiene?
e. ¿Es homogéneo o heterogéneo?
5- El recipiente de la imagen tiene agua coloreada y está tapado.
a. Identifica qué partes componen el sistema.
b. Clasifica el sistema en abierto, cerrado o aislado.
c. ¿El sistema es homogéneo o heterogéneo?
d. Si enfriamos el recipiente hasta obtener hielo,
¿cambiará la masa del sistema? Justifica
6- Se está estudiando la vida de los peces en una pecera que se encuentra encima de una mesa en el laboratorio.
a. Dibuje lo descrito arriba y señale cuál es el sistema, el límite y cuál es el ambiente.
b. Clasifique el sistema según la interacción con el ambiente, justificando su respuesta.
c. ¿Es homogéneo o heterogéneo?
Answer:
Las respuestas se dan a continuación.
Explicación:
1) Una búsqueda de helado y un vaso con jugo es un sistema abierto, un perro es un sistema aislado mientras que una bolsa de 1 kg de arroz sin abrir, un termómetro y una lata de guisantes es un sistema cerrado.
2) la limonada con hielo, el agua carbonatada, el agua en acetona y el café con leche son sistemas homogéneos mientras que el agua y el aceite, la tierra, la arena y las piedras son sistemas heterogéneos.
3) El recipiente de la imagen tiene agua coloreada y está tapado.
B. el sistema está cerrado.
C. El sistema es homogéneo.
D. Si enfriamos el recipiente a hielo, la masa del sistema no cambiará.
4- Se estudia la vida de los peces en una pecera que se encuentra sobre una mesa en el laboratorio.
a. El sistema es abierto y el medio ambiente es acuático.
B. Es un sistema heterogéneo.
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:
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Answer:
Movement
Explanation:
This is correct
What microbial types are likely to be present in each of your fomite samples? Of these, which are most likely to grow on the nutrient agar medium used in this investigation? Which is probably not culturable under the conditions used?
Hello. You did not enter the text to which these questions refer, which makes it impossible for them to be answered. However, I will try to help you in the best possible way.
It is only possible to answer your questions in a specific way by reading the experiment, however, I can inform you that formites are objects that allow the colonization and growth of microorganisms that can be major causes of diseases. Among these microorganisms are bacteria, fungi and viruses of the most varied species. Among these microorganisms, both fungi and non-demanding bacteria can grow in a nutrient agar culture medium. This is because this is a very simple culture medium where bacteria that do not need specific nutrients can grow and where most fungi can grow too. However, it is impossible for viruses to grow in this type of culture medium or in any culture medium, since viruses only develop inside a host's organism. Bacteria known as fastidious would also not grow in this type of culture medium, since they only grow with the presence of very specific nutrients.
A cladogram is shown below. What is a derived characteristic that distinguishes the salamander from the perch? lungs claws or nails fur jaws
About the question:
You will a cladogram in the attached files.
Answer:
lungs
Explanation:
A Cladogram is a tree-type graph based on cladistic analysis. It represents the common ancestral relationships among the involved groups.
• The tree-type graph is a ramified diagram that represents the relationship between the involved taxa.
• The cladistic analysis follows the maximum parsimony criterium. Explains the character state from the point of view of the fewest changes through history. Explains evolution with the minimal amount of evolutive changes. It recognizes the monophyletic groups as natural groups. These groups are the clades, and their classification -sequencing- represents their phylogeny.
• The sequencing term refers to lists of groups according to their relation. One group is the brother-group of the following one.
So the cladogram represents the relationship between groups according to a derived character.
The derived character is any trait that a group passes to the descendants. Through evolution, the characters change, and new changes are added. When referring to a derivate character, we mean that all the subsequent species in the cladogram carry the trait.
A cladogram provides an image of how new species keep characters that were inherited from older species.
In the attached cladogram, you can see that the lungs are the derived character that distinguishes the salamander from the perch.
Claws or nails separate salamander from lizards.
Fur separates birds and reptiles from mammals.
Jaws separate hagfish from perch.
Mutations occurred in evolution producing new traits, and these traits also appear in posterior groups. So, after the hagfishes emerged the jaws, and all the animals that followed the hagfishes have jaws.
Lungs appeared after the perch and before salamander, so salamander, and all the posterior animals, have lungs. And so on.