Open systems relate to beings that can exchange energy and matter with the environment, having the ability to maintain a steady state (homeostasis).
A closed system occur when one cannot exchange energy or matter with the environment.
All living things can exchange matter and energy with the environment, as they are always part of food webs and ecosystems.
Therefore, the correct answer is A. open systems.
before the sheep named Dolly was successfully clones, scientists believe that:
Before this, scientists believed that every cell in the body were capable of being cloned, or the first answer option. This conducted the researchers to carry lab surveys that eventually would form a cloned organism from another sheep.
Will the amount of hydrogen in the sun increase or decrease over the next few million years? Explain your reasoning.
The amount of hydrogen in the Sun is related to its core size, being the fuse of hydrogen atoms process the one that speeds up the sun increases. Today the amount of hydrogen and its fuse to make helium in the core is leqading toa 1% of increase in tluminosity every 100 million years, being 600 million tons of hydrogen fuse every second (forming 596 million tons of helium). It is estimated that in 5 billion yearsthe Sun will start to run out of hydrogen and begin to collapse . Therefore, it is estimated that the amount of hydrogen in the Sun is decreasing gradually since the star was born, because that amount is direct related to the core force and shine capacity of the Sun.th
1. Many simple eukaryotes reproduce by asexual reproduction, using onlymitosis. Assuming the environment is stable and the organism is well-adapted to its environment, why is this a better form of reproduction?
In this hypothetical case, the environment is very stable in which case there wouldn't be a selective pressure, therefore there is no need to recombine genetic material, a process that implies a high energetic investment, because there would have to be a high production of gametes, each with its respective process of recombination, as well as the effort to search for a partner to which exchange genetic material.
Why did the sinkhole form only over the sugar deposit?
This will symbolize groundwater. Place the cup with the sugar and sand in the water. Watch as the water fills into the cup and the sugar dissolves and runs out. A sinkhole is formed in the cup as the surface sand sinks into the area where the sugar dissolved.
mitosis and meiosis are types of cell division that occur in multicellular organisms which of thefollowing do mitosis and meiosis have in common?A. Haploid cells are produced from diploid cells.B. male and female haploid cells fuse to form a zygote.C. Homologous chromosomes pair up and form tetrads in the cell.D. Chromatids separate and move toward opposite ends of the cell
Mitosis produces two diploid cells that are genetically identical to each other while meiosis produces four haploid gametes that are genetically unique from each other and the parent cell.
The male and female haploid cells fuse to form a zygote in meiosis.
Homologous chromosomes pair up and form tetrads in the cell in meiosis. This is the cell division that needs crossing over and genetic variation.
In Mitosis, chromatids separate and move toward opposite ends of the cell during anaphase. In Meiosis, the sister chromatids separate and move toward opposite poles of the cell during Anaphase 2.
Answer - Option D. Chromatids separate and move toward opposite ends of the cell
Use the image as a resource to answer the following question:
To answer this question we need to remember quickly how proteins are produced and transported in the cell, first are produced in the ribosomes attached to the rough endoplasmatic reticulum, after this, proteins are transported to the Golgi apparatus where are modified and packed in vesicles for transport inside the cell and the outside.
The order is as follows
1.- Rough ER
2.-Golgi bodies/Golgi apparatus
3.-Vesicle
4.-Nucleus
5.-Ribosome
What is the role of ATP in transport across a cell membrane?O ATP is an energy molecule that helps with active transport.O ATP is an enzyme that speeds up chemical reactions in the cell.O ATP is an amino acid that is used to build transport proteins.O ATP is a carrier protein that transports substances across the cell membrane.
The correct option is the first one "ATP is an energy molecule that helps with active transport." ATP refers to "Adenosine Tri-Phosphate" which is a pretty useful molecule in every physiolocal issue of every cell. Therefore, it is very important with active transport. When ATP losses one of its phosphates (remember it has three) -it becomes ADP- it releases a high amount of energy which is useful for several processes, among them, active transport.
True or False?The sun is the only star in our galaxy.
A galaxy is composed of numerous solar systems. These systems are composed of stars, planets, dwarf planets, asteroids, and comets.
ANSWER: False
How does reproductive isolation differ in sympatric modes and allopatric modes of speciation?This is not a homework assignment.
To answer this question we need to remember some concepts, reproductive isolation is a phenomenon in which a population is isolated and cannot reproduce, this isolation can be due to a physical barrier or a genetic barrier, meanwhile, allopatry and sympatry are speciation mechanisms, this means that are processes of change among the populations and in both, reproductive isolation is involved, in the case of allopatry the barrier is physical, and in the case of sympatry, the barrier is genetic. So we can say that one is a phenomenon tha separates organisms meanwhile the others ar processes of change, therefore evolutive process
What is the Independent variable in the following scenario: Your mom tells you that eating breakfast will help you do better in school. To see if she is right, you eat a bowl of cereal with fresh fruit in it for breakfast for one month. For the next month, you skip breakfast altogether. At the end of each month, you record your grades in all your classes to see if she was right.
General category: Biology.
Sub-category: Scientific method
Topic: Independent and dependent variables
Introduction:
A dependent variable represents a quantity whose value depends on how the independent variable is changed.
Explanation:According to the statement of the problem, we have that
the hypothesis would be:
Eating breakfast improves grades.
This means that the notes vary with respect to eating breakfast or not (breakfast consumption). Therefore, the notes depend on whether the individual had breakfast or not. This means that grades are the dependent variable and the independent variable is breakfast consumption.
Notice that the variable breakfast consumption has as possible values: the individual had breakfast or the individual did not have breakfast.
We can conclude that the correct answer is:
Answer:The independent variable is:
breakfast consumption
where this variable has the possible values:
- the individual had breakfast or
- the individual did not have breakfast.
A stimulus resulting in the contraction of the biceps, will have originated in which of the following structures?Select one:a.precentral sulcusb.insular lobec.parietal lobe, left sided.post central gyruse.occipital lobe
a. The precentral sulcus is located in the rostral to the central sulcus in the frontal lobe. This area is considered the somatomotor cortex because it control the volitional movements of the collateral side of the body.
b. The insular lobe is an anatomical integration hub that connects to an extensive network of cortical and subcortical regions serving sensory, emotional, motivational, and cognitive functions.
c. The left side of the parietal lobe controls sensory perception and language processing.
d. The postcentral gyrus located in the main somatosensory area of the frontal cortex is the main sensory receptor for the sense of touch.
e. The occipital lobe is located in the back of the brain and is the smallest of the four lobes, it enables visual processing and visual memory.
The correct option is
Definition of agricultural expansion
Agricultural explansion refers to the growth of land dedicated to agricultural activities such as arable land, pastures, animal breeding, mass crops, etc.
CO2 + H2O → C6H12O6 + O2
What, is the correct way to balance this equation?
a
6CO2 + H2O → C6H12O6 + O2
b
6CO2 + 6H2O → C6H12O6 + 6O2
c
6CO2 + 6H2O → C6H12O6 + O2
d
CO2 + H2O → C6H12O6 + O2
Hi I don’t quite understand this question in my assignment, I need help please,Appreciate it thank you
This type of active transport is called endocytosis, because the substance to be internalized is first surrounded by the cell membrane, forming a vesicle, which is then integrated into the cytoplasm.
Match the following tools and techniques with the correct identifying statement, please.
Gel electrophoresis is a technique that is used to separate DNA on the basis of size and charge.
DNA fingerprinting is often used in the field of forensic science.
Polymerase chain reaction is a technique used to increase the number of copies of a specific region of DNA.
Cloning is a method used to make a genetically identical replicate of a multicellular organism.
CRISPR is a recent genome editing technology, considered to be faster and more efficient.
34. Evaluate the truth of this statement and give a reason for your answer: Many people do not take the time to be bothered with protecting the envi- ronment because they do not fully understand how their actions impact the natural world.
The question's statement would be true since there's known that a high percentage of our population does not have clear ideas of how our daily actions impact the environment. Maybe this is because currently, we don't have an important ecological education and culture as a society that transcends from learning spaces, such as school and college, to our jobs and the other social spaces, such as those for our entertaining.
2.TALSvervirBase your answer(s) to the following question(s) on the diagram below and on your knowledge of biology. Thediagram represents a cell and its changes as a result of two laboratory procedures, A and B.BandDescribe procedure A and explain why it would cause the change shown.puls
The process showed in A is called plasmolysis. In such process, a cell loses water because it is in a hypertonic solution, i.e. the outside of the cell has greater concentration of solutes that the inside of the cell.
Which is the best description of the dynamic equilibrium that occurs across cell membranesA. Cell membranes will merge into one another only when the two cells are at equilibriumB. Phospholipid bilayers are always movingC. Concentrations will shift up and down tiny amounts, but hover around the same levelsD. Charged particles will dynamically connect with their opposites
C. Concentrations will shift up and down tiny amounts, but hover around the same levels.
The concentration of ions outside the cell and inside the cell will differ depending on what the body needs. There will be times that the charge inside the cell is more positive due to higher concentration of positive ions than outside the cell. But it will tend to go back into equilibrium like pumping out the excess ions out of the cell.
The correct way to calculate population size is by dividing the total population by the land area.TrueFalse
When you want to calculate the size of a population or the population density of that species, just do the following math: divide the total amount of the population by the area occupied by these individuals.
In this way, the population density is found and we can know the size of the population.
The statement is true.
Explain why gas exchange surfaces, like the alveoli in our lungs, are always moist?
Gas exchange surfaces, like the alveoli in our lungs are always moist to allow the exchange of carbon dioxide and oxygen gases.
In animals, the process of respiration is aerobic respiration, exchange of gases takes place( carbon dioxide leaving the cell, oxygen entering)
Single cellular organisms can exchange gases directly across their cell membrane through the process o diffusion.
Large animals that cannot maintain gas exchange processed by diffusion across their outer surface. A respiratory surface is covered with thin, moist epithelial cells that allow oxygen and carbon dioxide to exchange. Carbon dioxide and oxygen are the gases that can only cross cell membranes when they are dissolved in water or an aqueous solution, thus respiratory surfaces must be moist.
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Enzymes can speed up chemical reactions because they can absorb excess energy.
The statement is false. It is correct that enzymes can speed up biochemical reactions, that is why they are also known as biological catalysts. But the way they do their function is that they can decrease the energy needed for a reaction to occur. Moreover, they can help with the interaction with two molecules that have to interact and favour it in ther active site.
The cells produced from meiosis are known as ___ for use in sexual reproduction.
The process of meiosis produces genetically unique reproductive cells called gametes, which have half the number of chromosomes as the parent cell. Fertilization, the fusion of haploid gametes from two individuals, restores the diploid condition.
Fill in the blanks then explain:Volcanic eruptions has ______ and _____ effect on the environment
Volcanic eruptions has the release of volcanic gas and it can provoke climate changes that have a negative effect on the environment.
The volcanic gases are harmful for the environment, there is multiple substances in the volcanic gas, since water molecules (harmless), carbon dioxide, and surfur dioxide. When thr volcanic gases are realesed in the atmosphere it causes climate changes, such as increase the temperature, cause changes in the oceanic cycle, increase the levels of carbon dioxide, and so on. All that actions provoke changes and negative effects in the general environment, being more present in the closer vicinity of the eruption.
Can you explain to me the acholic energy reaction (atp) you get from yeast
Fermentation is a way to obtain energy from carbohydrates when there is no oxygen available. Fermentation can be realized for many organisms, even when is not the main source of energy. For example, humans can realize lactic fermentation.
There are different types of fermentation depending on what substance is produced. In ethanol or alcoholic fermentation, the organisms take the carbohydrates and produce ATP, ethanol, and carbon dioxide. An example of organisms that perform alcoholic fermentation is yeast.
Functions of liver and what does it mean that Liver metabolises Fats Etc
The liver is considered as the largest internal organ. The liver plays a role in filtration. It acts as a filter of the body. All blood theat leaves the stomach and intestines passes through the liver. It detoxifies the blood. It also acts on digestion. It make and secrete bile that are responsible for the purification of blood coming from the small intestines. Liver is an important organ responsible for making proteins.
Liver is acts on the metabolism of fat. The liver cells break down fats to produce energy. This is happening during fasting state of an individual. Half the fat from a meal is being burned for energy. The rest is stored to adipose tissue until it is needed during fasting.
Which of the following best describes what happens during the phases of mitosis shown in the diagram?
The given diagram represents Metaphase and Anaphase on the left and right sides respectively, which occur during mitosis.
The diagram depicts two phases, i.e. Metaphase as well as Anaphase, which are observed during the process of mitosis. Mitosis can be defined as a type of cell division where a particular cell (parent cell) undergoes division in order to give rise to two new cells (daughter cells). These newly formed cells are genetically similar to the parent cell.
During Metaphase, the chromosomes appear to be arranged in the central region of the cell in a linear fashion. During Anaphase, the chromatids segregate from each other and progress towards opposite ends of the cell undergoing mitosis.
To learn more about Metaphase here
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Which of the following is a way that the body determines how much of a certain chemical, protein, enzyme, or response is needed to maintain homeostasis?Question options:A) Kickback inhibitionB) Feedback inhibitionC) Signal loopD) Resource limitation
The correct answer is B) feedback inhibition. This mechanism works when a certain concentration of the key product has been reached. When no more product is needed, this mechanism is activate, which allows cell metabolic equilibrium.
Internal adaptations are the traits created by an evolutionary process whereby a population becomes better suited to its habitat by adapting the function of its internal structures. What is an internal adaptation fish have that makes them well suited for aquatic life? Select ALL that apply.A)Fins for swimmingB)Streamlined body for swimmingC)Gills for breathing underwaterD)Swim bladder for maintaining buoyancyE)Coloration specialized for camouflage
Answer: A, B, C, D
Explanation:
Fishes inside water have streamlined shape body and have slippery scales to move inside water and protect themselves. Fishes have fins and tails to keep balance in water. They also have gills to use oxygen dissolved in water which help them to live inside water for years.
Which 2 processes lead to variety?
1. Mutations
2. Incomplete Meiosis
3. Nondisjunction
Answer:
mutations leads to variety
What are the four spheres on earth and describe them. Give an example of how humans interact with each sphere.
The four spheres of the Earth include:
Atmosphere- the gaseous layer of the earth
Ex. We can interact with the atmosphere through the gases that we inhale- oxygen (O2) and exhale- carbon dioxide (CO2).
Lithosphere- refers to other solid crust of the Earth
Ex. Humans can interact with the lithosphere through agriculture (source of food), mining, building infrastructure.
Hydrosphere- comprises all water in the Earth
Ex. We can interact with the hydrosphere through the water that we drink.
Biosphere- includes all the living things on the Earth
Ex. We can interact with the biosphere through hunting (source of food)