Answer:
c. a natural disaster
Explanation:
A limiting factor in an ecosystem can either be density dependent or density independent. A density independent limiting factor is that which does not rely on the density of a population to affect it's size.
A density independent factor affects the population size irrespective of how densely populated the population is. Examples of density independent limiting factors that can affect a population are natural disasters like fire outbreak, hurricane, earthquake etc.
describe how the body maintain the level of glucose in the blood while a person goes without food
Answer:
the body has glucagon and insulin, glucagon tells the body to release more glucose whenever glucose levels are low and insulin feels the glucose to the body, reducing glucose levels
Explanation: pretty much it
Evolutionary reversals (character losses) are also common among living members of a vertebrate lineage and early members of the lineage. Choose examples that illustrate this observation. Select the three correct statements. Select the three correct statements. Hagfishes lack legs. Birds have shelled eggs. Sharks lose old teeth. Sharks have eggs with protective coats. Living birds lack teeth. Most mammals lack shelled eggs. Whales and snakes lack legs.
Answer:
Living birds lack teeth.
Most mammals lack shelled eggs.
Whales and snakes lack legs.
Explanation:
Living birds lack teeth, Most mammals lack shelled eggs and Whales and snakes lack legs are the characteristics that are present in modern animals as compared to their ancestors. These changes occur in the organism due to evolution that occurs with the passage of time and the main reason for that is change occurs in the environmental conditions for organism which force them to make changes which is best for the environment.
Stored energy or energy of position is known as
Energy *
1.)Potential
2.)Kinetic
Answer:
Explanation:
1) potential because it is not "in motion"
A molecule that enters the body from an external source and alters its normal functions is a(an) A molecule that enters the body from an external source and alters its normal functions is a(an) agonist. drug. antagonist. steroid. hormone.
Answer:
Antagonist
Explanation:
Antagonist refers to molecule that enter the body and block actions. They are like ligands that attache to receptors but don't activate the receptors. But the decrease or reduce the biological activities or actions of other drugs in the body. They block biological functions , hence they are refer to as blockers.
Part D - The effect of gramicidin on oxidative phosphorylation When the protein gramicidin is integrated into a membrane, an H channel forms and the membrane becomes very permeable to protons (H ions). If gramicidin is added to an actively respiring muscle cell, how would it affect the rates of electron transport, proton pumping, and ATP synthesis in oxidative phosphorylation
Answer:
The correct answer would be -
Remains the same: proton pumping rate, electron transport rate, rate of oxygen uptake.
Decreases or goes to zero: rate of ATP synthesis, size of protein gradient
Explanation:
An H+ channel forms and the membrane becomes very permeable to protons if the protein gramicidin is integrated into a membrane. If gramicidin is added to an actively respiring muscle cell, it will affect the in the following manner:
Remains the same:
proton pumping rate, electron transport rate, rate of oxygen uptake.
Decreases:
rate of ATP synthesis, size of protein gradient
None of these will show an increase due to the addition of gramicidin tlo actively respiring muscle cells.
Question 2 please help choices are prokaryote or eukaryote
Answer:
1. Circular chromosome, no mitosis = PROKARYOTES
2. Sterols in membrane, performs exocytosis = EUKARYOTES
3. Cell wall and mitochondria present = EUKARYOTES
4. Spirillum shape present = PROKARYOTES
Explanation:
Prokaryotes are organisms that notably lack a membrane bound nucleus while eukaryotes possess a membrane bound nucleus. Although, there exists other characteristics and features that distinguishes these two domains of organisms.
- Circular chromosome is a feature possessed by prokaryotic organisms e.g. bacteria. Also they do not undergo mitosis, instead they perform binary fission.
- Sterols are a class of lipids present in the membranes of all eukaryotes. Prokaryotes lack this feature. Also, eukaryotes perform the process of exocytosis, which is how eukaryotic cells release waste particles outside the cell.
- Mitochondria is a structure present only in eukaryotic organisms. Hence, an organism that possesses both cell wall and mitochondria is an EUKARYOTE.
- Spirillum is a characteristics of spiral shaped bacteria called spirochetes. Since bacteria are prokaryotic, hence, the spirillum shape is a prokaryote.
List and describe the functions of at least six different types of tissue.
Answer:
Epithelial tissue, also referred to as epithelium, refers to the sheets of cells that cover exterior surfaces of the body, lines internal cavities and passageways, and forms certain glands. 2.Connective tissue, as its name implies, binds the cells and organs of the body together and functions in the protection, support, and integration of all parts of the body. 3. Muscle tissue is excitable, responding to stimulation and contracting to provide movement, and occurs as three major types: skeletal (voluntary) muscle, smooth muscle, and cardiac muscle in the heart. 4.Nervous tissue is also excitable, allowing the propagation of electrochemical signals in the form of nerve impulses that communicate between different regions of the body.5. Muscle tissue, which responds to stimulation and contracts to provide movement.6. Loose connective tissue. Loose connective tissue is also called the areolar connective tissue. It has almost equal amounts of cells, fibers and ground substance.
Why is birth rate multiplied by 1000 not 100
Five facts about protein synthesis
Answer:
1.Unzipping. - DNA double helix unwinds to expose a sequence of nitrogenous bases. ...
2.Transcription. A copy of one of the DNA strand is made. ...
3.Translation (Initiation) mRNA couples w/ ribosome & tRNA brings free amino acids to ribosomes.
4.Elongation. - Anticodon of tRNA recognizes codon on mRNA. ...
5.Termination.
An E. coli cell contains about 15,000 ribosomes, which carry out protein synthesis. Assuming ribosomes are spherical and have a diameter of 20.0 nm, calculate the fraction of the E. coli cell volume that is occupied by ribosomes.
Answer:
14.57%
Explanation:
From the previous lesson, we understood that the Volume of E.coli = 4.13 × 10⁻¹⁹ m³
The diameter of the ribosome = 20 nm
Radius will be D/2 = 20 nm/2 = 10 nm
The volume of the sphere since the shape of the ribosome is spherical = 4πr³
∴
The volume for each ribosome = 4πr³
For 15000 ribosome, we have:
[tex]= 15000 \times (\dfrac{4}{3}\pi) ((10^{-8})^3)[/tex]
[tex]= 15000 \times (\dfrac{4}{3}\pi) (10^{-24})[/tex]
= 6.283 × 10⁻²⁰
Thus, the fraction of E.coli volume occupied by the ribosome can be determined by using the formula:
[tex]= \dfrac{Vol. \ of \ ribosome}{Vol. \ of \ E.coli}\times 100[/tex]
[tex]= \dfrac{6.283 \times 10^{-20}}{4.31 \times 10^{-19}}\times 100[/tex]
= 14.57%
Explain why the arrangement of water molecules is different in ice and water.
Answer:
Because the ice is in solid state and water in liquid state
Ý nghĩa chủ yếu của việc phát triển các vùng chuyên canh cây công nghiệp lâu năm ở Tây Nguyên là
how planaarians able to survive without resoirtiry and circulatory system
Answer:
they possess different adaptive features
True of False - Acne is a skin disorder/disease that affects the integumentary system.
Answer:
True
Explanation:
clogged skin cells
i need help asap, that would be great!
Answer:
the 4th one
Explanation:
Answer:
secondary succession
Explanation:
just read it
What is natural selection?
Answer:
Basically in simple terms, a process in which capable animals can adapt and live longer to their environment than to others. Like a light colored mice on dark rock wouldn't survive unlike dark colored mice
Explanation:
In nature, living organisms have to navigate conditions (such as severe heat, extreme cold, drought, predation, food scarcity, etc) surrounding their existence in order to survive.
The theory of evolution states that as they conquer these conditions, their behavior and physical abilities, and traits evolve and become efficient at doing so.
These traits are then passed on to their offspring via the process of reproduction.
The process by which their physical qualities change to survive their environment is called adaptation.
Those who are unable to evolve are terminated by the harsh conditions of nature. Those who are unable to pass their abilities to survive to their offspring also get wiped off. Those who adapt and reproduce are deemed to be selected naturally to survive hence the term - Natural Selection.
Hence natural selection is a component of evolution.
Evolutionists have stated that the Giraffe is an example of an animal that evolved. It developed a long neck to enable it to reach for food far off the ground and on trees when there was a condition that wiped off shrubs available for them to graze on easily off the ground.
As giraffes with longer necks grazed and fed well, they passed on the gene to their offspring whilst those without adequately long necks got terminated by nature.
Another example is given in the attached picture. The animal in the picture is a desert dragon lizard adapting the color of its skin to blend to its environment in order to escape being spotted by desert hawks that prey on them.
Learn more about natural selection here:
https://brainly.com/question/23279230
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tình trạng này chủ yếu là do vô cảm 1 phần ảnh hưởng từ các tác nhân xã hội
What is the counterstain in the Schaeffer-
Fulton endospore stain procedure?
Answer:
The Schaeffer–Fulton stain is a technique designed to isolate endospores by staining any present endospores green, and any other bacterial bodies red. The primary stain is malachite green, and the counterstain is safranin, which dyes any other bacterial bodies red.
Atoms react with one another based on what
1. Total electrons
2. Valence electrons
3. Protons
4. Neutrons
Answer:
2
Explanation:
valence electrons=reaction
Please If you answer this question right I'll give you brainliest. Of you could answer in the next 40 mins that would be AWESOME.
Answer:
The flow of energy in a forest community
Applying a force to an object causes it to
Change it's momentum
O None of the above
O Gain mass
O Accelerate
Why would dark moths have an advantage?
Answer:
They would have an advantage in places covered in items with their tone of "skin" Allowing them to camouflage and not be eaten
Explanation:
Couldn't find a better word for skin lol
Cómo es estudiado hoy el organismo humano?
Type of relationship where one organism survives while by feeding on another.
A) Commensalism
B) Parasitism
C) Mutualism
D) Predator-Prey Relationship
Answer:
B) Parasitism
Explanation:
According to the endosymbiotic theory, which cellular process was involved in the evolution of mitochondria and chloroplasts?
Answer:
This process would be the one truly responsible for the "evolution" of mitochondria and chloroplasts as we know them from their prokaryotic ancestors. The cell process that would have initiated endosymbiosis is endocytosis; the process of taking things inside the cell
Answer: b) Phagocyntosis
Many functions in the body are controlled by special compounds which statements about these compounds do you think are true? Check all that apply
Answer:
Explanation:
bipiyvivt7t8cvic8t
Optimal foraging theory suggests that:__________
a. when search time is long relative to handling time, predators should be generalists.
b. when handling time is long relative to search time, predators should be generalists.
c. new items are added to the diet only if their handling time is larger than average.
d. specialized diets are rare in nature.e.none of the above
Answer:
a. when search time is long relative to handling time, predators should be generalists.
Explanation:
In behavioral ecology, the optimal foraging theory can be used to predict animal behavior related to the search for food. Animals need to take different foraging approaches in order to obtain better energy cost benefits. This theory proposes that natural selection chose animals that maximize their adaptive fitness by adopting the better (economically effective) foraging pattern according to its environment. Moreover, animals are regarded as generalists when they are capable of surviving in many different habitat conditions and/or eat different types of foods (omnivores are generally generalist species). In this case, predators with large search times don't have time to choose between different prey, thereby they will be generalists.
which two are the most similar?
A: comets and asteroids
B:comets and meteorites C:asteroids and meteoroids
D: asteroids and meteorites
Answer:
C.Astroids and meteoroids
Which of the following observations can be explained by plate tectonics?
PLEASEEE HELPP
Continental crust is tertiary crust, formed at subduction zones through recycling of subducted secondary (oceanic) crust. The average age of the current Earth's continental crust has been estimated to be about 2.0 billion years. Most crustal rocks formed before 2.5 billion years ago are located in cratons.
please make me brainlist answer
The one that is explained by plate tectonics is shape and size of rock formation in caves. The correct option is C.
What is plate tectonics?Plate tectonics is the widely accepted scientific theory that the Earth's lithosphere is made up of a number of large tectonic plates that have been slowly moving since approximately 3.4 billion years ago.
Cooler parts of the Earth's crust were pulled downwards into the warmer upper mantle around 4 billion years ago, damaging and weakening the surrounding crust.
According to the authors, the process repeated itself until the weak areas formed plate boundaries.
A mass movement of the bedrock creates tectonic caves. The rocks separate along joints or fractures and are mechanically pulled apart.
The resulting cave is typically a high, narrow fissure with nearly planar walls and matching patterns on both sides of the passage.
Thus, the correct option is C.
For more details regarding plate tectonics, visit:
https://brainly.com/question/19317822
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Escribe los nombres de cinco plantas de tratamiento del agua que se encuentren en Bogotá
Answer:
Bogota esta ubicasa en un altiplank, Llama do sabana de Bogota, en la Cordillera Oriental de la Andes a una altura de 2.640 metros (8.660 pies) sobre el nivel del mar. La region extendkda se conoce Como Altiplank Cundiboyacense, que significa "altiplano de Cundinamarca y Boyaca". El rio Bogota cruza la sabana y forma el Salto del Tequendama al suroeste. Los rios afluentes forman valles done se encuentran aldeas y cuya economic se basa en la agrictura, la ganaderia y la prosuccion artesanal. La sabana limitia al este con los cerros orientals que corren de norte a sur y contienen los cerros Guadalupe y Monssrrate. El limits occidental de la ciudad esta formado por el rio Bogata. Hacia el norte, el Area Metropolitana de Bogata se extiende sobre el altiplano hasta las localidades de Cina y Sopo.
Espero que eato haya ayudado.