Final answer:
As a cell grows in size, its volume increases more rapidly than its surface area, leading to a decrease in the surface area-to-volume ratio which makes it harder for the cell to exchange substances efficiently. Therefore, larger organisms require specialized organs to handle these exchanges.
Explanation:
As a cell grows, its volume increases much more rapidly than its surface area. This is because the volume of a cell grows cubically (to the power of three) while the surface area grows quadratically (to the power of two). Consider a cell as a sphere with the formula for surface area being 4πr² and for volume 4πr³/3. As the radius increases, the surface area-to-volume ratio decreases, leading to inefficient exchange of materials.
For instance, in Figure 5.2.4, a small cell with dimensions of 1mm has a surface area to volume ratio of 6:1, while a larger cell with dimensions of 2mm has a surface area to volume ratio of 3:1, displaying that volume increases faster than surface area. This increasing ratio affects the ability of the cell to transport nutrients and waste efficiently across the cell membrane, crucial for cellular functions like obtaining oxygen, growth, and reproduction.
Thus, as an organism grows, it needs specialized organs to aid in efficiently exchanging substances, due to the decreasing surface area-to-volume ratio with increasing cell size.
Which of the following is a function of chloroplasts?
A. Chloroplasts provide a vesicle for materials to move around in the cell.
B. Chloroplasts absorb sunlight to enable a plant to make food.
C. Chloroplasts oxidize sugar to produce chemical energy in the form of ATP.
D. Chloroplasts provide a site for amino acids to be assembled into proteins
Pioneer plant species could be described as those that,
A) sprout from seeds after a forest fire.
B) form large forest trees that shade understory plants.
C) are slow to mature, and require a soil with well-balanced nutrients.
or
D) are small in size, and have highly effective means of dispersing their seeds.
D) are small in size, and have highly effective means of dispersing their seeds.
Answer:
The correct answer is option A, sprout from seeds after a forest fire
Explanation:
Pioneer species are basically the first species that grow or re-originate in any area after a disturbance. Disturbances may include forest fires, floods, etc.
Here in this questions, in option A, seeds are sprouting after forest fire. Forest fire is a disturbance and seeds sprouting just after a disturbance can be considered as pioneer species of plant.
what biome is characterized by very low temperatures, little precipitation, and permafrost
A. desert
B. temperate forest
C. tundra
D. tropical rain forest
The answer is C i belive
what are inputs and outputs of cellular desperation and photosynthesis?
Which best describes eras and periods?
A. Eras have a smaller time span than periods.
B. Eras and periods are independent of each other.
C. Eras and periods both appear at the start of the Cambrian period.
D. Eras were more recently established on the time scale than periods.
Both Eras and Periods measure time after the start of the Cambrian Period, which means that your answer is:
C.
Hope it helped,
BioTeacher101
The correct answer is option C, that is, eras and periods both appear at the start of the Cambrian period.
The first geological time period of the Paleozoic Era is known as the Cambrian period. This period ended for approximately 53 million years and signifies a dramatic burst of evolutionary modifications in life on Earth also called Cambrian Explosion.
The Cambrian period signifies an essential phase in the history of life on Earth. It is the phase when the majority of the prime animal groups initially appeared in the fossil record. An era refers to a particular time period, while a period may be used to signify towards the events, which do not exhibit any particular era or precise dates.
Jill has a headache and takes pain reliever to end the pain. This is an example of a(n):
Final answer:
Jill taking a pain reliever for her headache exemplifies conditioned behavior and the use of over-the-counter medication, highlighting a learned response to discomfort that's reinforced by the relief it provides.
Explanation:
Jill has a headache and takes pain reliever to end the pain. This is an example of a(n): conditioned behavior and use of over-the-counter (OTC) medication. When individuals take pain relievers, such as acetaminophen or non-steroidal anti-inflammatory drugs (NSAIDs) to alleviate pain, they are exhibiting a learned response to dealing with discomfort. This behavior is reinforced over time as pain relief follows the act of taking the medication, making it likely that they will turn to pain relievers again in the future. OTC medicines like aspirin, naproxen, and ibuprofen are commonly used for minor aches and pains associated with conditions like headaches, demonstrating a direct action on the pain pathway to alleviate symptoms. This practice is not only about the chemical effect of the medication but also involves psychological elements, such as the expectation of pain relief, which can enhance the overall effect.
How does a cell separate itself from its environment and still allow materials to leave and enter the cell in order to maintain homeostasis?
ah! All thanks to the cell membrane!
The cell membrane contains phospholipids that are amphiphilic (polar - water attracting and non-polar - water repelling) in nature. That's why the cell membrane allows non-polar materials to pass through but not polar materials. (if you're learning junior science you really don't need to know this!) The polar materials require proteins found on the cell membrane called protein channels or carrier proteins to pass through. (their names are pretty self-explanatory!)
All the best!
Which of the following provides the best description of a difference between prokaryotic and eukaryotic cells? (2 points)
A. The cell membrane of prokaryotic cells contains proteins, while the cell membrane of eukaryotic cells contains only lipids and carbohydrates.
B. The DNA in eukaryotic cells is enclosed in the nucleus, while the DNA in prokaryotic cells is not separated from the rest of the cell's contents.
C. Eukaryotic cells have cell walls that consist mainly of sugars, while prokaryotic cells do not.
D. Prokaryotic cells contain chloroplasts and mitochondria, while eukaryotic cells do not contain specialized organelles.
The DNA in eukaryotic cells is enclosed in the nucleus, while the DNA in prokaryotic cells is not separated from the rest of the cell's contents.
While observing a cell under your microscope, you determine that it is a prokaryote. What about that cell made you think that? The cell lacks DNA. The cell lacks cytoplasm. The cell lacks a nucleus. The cell lacks a cell membrane.
The cell lacks a nucleus. We know this because prokaryotes are single celled organisms that lack a membrane bound nucleus or membrane bound organelles. So, looking under the microscope, you'd notice that the cell has no distinct nucleus, which immediately helps us find the answer we're looking for.
answer c
I just copied his answer honestly so u could make him brainliest
The speed of sound through water is 1400 m/s. Which of the following could be the speed of a sound wave through air?
Answer is A. 430 as the speed of sound in water is 1498 m/s but the question has taken an approximate of 1400 m/s
The expected speed of sound in the students' colder-than-usual school room would be lower than the accepted room temperature value of 346 m/s, and much lower than the speed of sound through water.
Explanation:The speed of sound through air varies with temperature and the typical value at room temperature (20°C or 68°F) is 343.5 m/s. This value decreases when the air is colder. Since the accepted speed of sound at room temperature air is 346 m/s, and the school is colder than usual, the speed of sound in the school's room would be expected to be less than 346 m/s, certainly lower than the speed of sound through water which is about 1482 m/s. When the students use standing wave patterns in their lab procedure, they would find a speed lower than the standard 346 m/s due to the lower temperature of their environment.
The accepted speed of sound in room temperature air is 346 m/s. However, in the question, it is mentioned that the speed of sound through water is 1400 m/s.
Since sound travels faster through solids and liquids than through gases, we can conclude that the speed of sound through air will be less than 1400 m/s. Therefore, none of the speeds listed in the options could be the speed of a sound wave through air.
Is space a limiting factor for plant population? Name tow ways
Yes, space is a limiting factor for the plant population.
The space occupied by the plant on the earth determines the amount of the nutrition derived from the soil, if the land is occupied by many plants, the space for the adherence and the nutrient intake would be a factor for competition.
All the plants need sunlight to survive, as it is the source of energy for them. In case, a tree or a plant occupies a huge aerial space, then it would shade the sunlight for the smaller plants, hence, the plants cannot grow in completely shaded region.
Circular motion includes all curved paths, not just movement in full circles
Answer;
The above statement is true
Explanation;
-Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation.
When an object moves in a circle at a constant speed its velocity (which is a vector) is constantly changing. Its velocity is changing not because the magnitude of the velocity is changing but because its direction is.
Answer:
true
Explanation:
Cellular respiration, as well as other body processes, produces wastes. These wastes must be eliminated from the body in order for the body to maintain homeostasis. What is the primary organ system responsible for eliminating from the body?
In camellia plants, flower color is controlled by a single gene with codominant alleles. A camellia plants with red flowers (RR) is crossed with a camellia plant with white flowers (WW). What are the expected phenotypes of the offspring of this cross?
A. All will have both red and white flowers.
B. Half will have red flowers and half will have white flowers.
C. All will have red flowers.
D. All will have pink flowers.
The correct answer is: A. All will have both red and white flowers.
If camellia plant with red flowers (RR) is crossed with a camellia plant with white flowers (WW), then
P: RR x WW
F1 generation: RW RW RW RW
This means that all of the offspring will have both colors. Codominant means that red and white are equally dominant (both expressed).
In a cross between camellia plants homozygous for red and white flower alleles which are codominant, all offspring will have both red and white flowers visible.
Explanation:In camellia plants, flower color is controlled by a single gene with codominant alleles. The red (RR) and white (WW) flowers represent plants that are homozygous for the red and white alleles respectively. When these plants are crossed, the offspring receive one allele for red and one for white from the parent plants. As they are codominant, both alleles will express themselves, resulting in a phenotype where both red and white are visible. Therefore, the correct answer is A. All will have both red and white flowers.
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Why would scientists collect species that they are studying
what kind of cell is this
Nucleus Cell/Membrane something like that! hope this helps (sorry if i'm wrong)
It is an animal cell(eukaryote)
Match the following terms and definitions. 1. an organism that can make its own food commensalism 2. a symbiotic relationship between two organisms in which one species benefits and no effect is apparent to the other species eukaryote 3. a cell that has a membrane-bound nucleus and/or organelles as its major characteristic protist 4. the study of organisms that are too small to be seen with the naked eye autotroph 5. a disease-causing organism; a germ pathogen 6. a one- or few-celled organism with chromosomes; may have characteristics of both animals and plants microbiology
The matching process has connected each scientific term with their appropriate definitions. For example, an autotroph can make its own food, a eukaryote is a cell with a nucleus, and microbiology studies microscopic organisms.
Explanation:The terms and their corresponding definitions based on your presented list are as such:
Autotroph is an organism that can manufacture its own food.Commensalism refers to a symbiotic association in which one organism benefits and the other is not apparently affected.A cell characterized by the presence of a nucleus and/or other membrane-bound organelles is considered a Eukaryote.Microbiology is the scientific study of organisms too small to be seen without the use of a microscope.Pathogen can be described as a disease-causing organism or a germ.With chromosomes and potentially characteristics of both animals and plants, a protist is a one- or few-celled organism.Learn more about Scientific term here:https://brainly.com/question/17309728
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The complete question is given below:
Match the following terms and definitions.
Part A:
1. an organism that can make its own food
2. a symbiotic relationship between two organisms in which one species benefits and no effect is apparent to the other species
3. a cell that has a membrane-bound nucleus and/or organelles as its major characteristic
4. the study of organisms that are too small to be seen with the n_aked eye
5. a disease-causing organism; a germ
6. a one- or few-celled organism with chromosomes; may have characteristics of both animals and plants
Part B:
a. eukaryote
b. protist
c. autotroph
d. pathogen
e. microbiology
f. commensalism
In what form is coded information found in DNA? letters of the alphabet the type and sequence of molecules along each strand no one knows each chromosome "spells" out a particular trait
The correct answer is the type and sequence of molecules along each strand.
The DNA is formed of molecules known as nucleotides. Each nucleotide comprises a sugar group, a phosphate group, and a nitrogenous base. The four kinds of nitrogen bases are thymine (T), adenine (A), cytosine (C), and uracil (U). The order of these bases is what that determines the genetic code or the DNA instructions.
Two hominid fossils are found in the same rock strata in caves about 10 kilometers apart in France. After radioactive dating, both are found to be about 150,000 years old. What else should be done before they are assigned to the same species?
A. Excavate deeper rock layers.
B. Look for evidence of tool use.
C. Find more fossils in both caves.
D. Compare anatomical structures.
Answer:
The correct answer will be option D.
Explanation:
Hominids are the species of a large group of primates genus called Homo. The history of this genus dates back about 2.5 million years ago based on the fossils found.
In the given question to assign the species taxon to the new fossils, the study of fossils has to be done more deeply to check whether they belong to the same species or not. This could be done by studying their anatomical features in detail that is studying their bones in detail and comparing them.
Thus, option D is the correct answer.
How does a diversity of organisms increase the chances that some will survive a major change in environment ?
This can be explained with an example.
Let’s lake an example of two species 1 and 2.
Species 1 has a wide genetic diversity due to which organism are also diverse in phenotype. Their phenotype are:
Black, dark brown, brown, dark red, red, light red, pink, skin color.
From left to right organism are becoming less adapted to high temperature relatively.
For species 2: This species has less genetic diversity and its phenotypic diversity is as follow:
Black, red, Skin color.
From left to right organism are becoming less adapted to high temperature relatively.
Now if there is the sudden high temperature in the environment; 4 Types of phenotype will survive are black, dark brown, brown, dark red.
While there will only two types of organism in specie 2 which will survive are black, red.
So that’s how the diversity of organisms increase the chances that some will survive a major change in environment.
Which statements are correct concerning human DNA? it contains 23 chromosomes it contains 46 chromosomes each strand contains the chromosomes from one parent each chromosome contains 23 genes
Kinases and cyclins are internal factors that A. cause apoptosis B. control the cell cycle C. cause cancer cells to break away D. prevent mitosis
B. control the cell cycle
Kinases and cyclins are internal factors that regulate the cell cycle by ensuring that cells progress through the necessary stages of cell growth and division at the proper times.
Explanation:Kinases and cyclins are internal factors that work in symbiosis to control the cell cycle. Their primary function is to ensure that cells progress through the necessary stages of the cell cycle at the proper times, thus regulating cell growth and division. Specifically, cyclins are a group of proteins that are produced in cells during various stages of the cell cycle. Their levels rise and fall regularly, linked with the progression of the cell cycle. Kinases are enzymes that transfer phosphate groups from ATP to proteins in a process called phosphorylation. This process aids in the regulation of the cell cycle. Together, the cyclin-dependent kinases (CDKs) and cyclins form a complex that helps orchestrate cell division.
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A scientist uses materials in her lab to turn one piece of dna into 100 copies
what are you asking?
This biomolecule is typically used as a source of energy for cellular respiration.
Answer:
The correct answer is "glucose".
Explanation:
Cellular respiration is the pathway of chemical reactions at which glucose is broken down to produce energy. In cellular respiration oxygen is used to broke down glucose, resulting in the production of carbon dioxide and water as by-products. The final objective of cellular respiration is to produce energy in the form of adenosine triphosphate (ATP). Therefore, the biomolecule that is typically used as source of energy for cellular respiration is glucose, and ATP is the molecule used to carry energy.
HALP MEH ASAP! Explain how energy moves through a food chain and a food web.
A food chain describes how energy and nutrients move through an ecosystem. At the basic level there are plants that produce the energy, then it moves up to higher-level organisms like herbivores. After that when carnivores eat the herbivores, energy is transferred from one to the other.
Anoles are a family of lizards found throughout the Americas. Green anoles, Anolis carolinensis, are native to a specific area of Florida. In this area, the primary territory of green anoles was once along the ground and in low-level branches. However, the introduction of brown anoles, Anolis sagrei, from Cuba forced green anoles to shift their territory to the tops of trees. The branches at the treetops are smoother and thinner than those close to the ground. Over time, the toe pads of the green anoles have become larger and stickier.
What is the best explanation for the change in green anoles' toe pads?
A.
Some individuals in the green anole population had mutations that helped them survive and reproduce in the new conditions, so their genes were passed on to the next generation.
B.
Gene flow between the green and brown anoles provided the green anoles with traits that helped them survive and reproduce, and those traits were passed on to the next generation.
C.
The feet of the green anoles became larger and stickier as they used them, which helped the green anoles to better survive, reproduce, and pass the trait on to the next generation.
D.
The change in conditions caused mutations in green anoles that gave them beneficial traits for survival and reproduction, and those mutations were passed on to the next generation.
The answer is; A
The mutation occurs in the population at low rates. However, if these mutations are advantageous, they are maintained in the population and passed on to next generations. This way, the frequency of the mutated alleles increase with each generation. This is how gene change occurs and natural selection.
The correct answer is (A)
Some individuals in a large population are mutated and the mutation was successful as it helped the population to to survive in a better way. The frequency of mutated population started reproducing and was passed on to the next generations. The frequency of mutated population increases with each generation. Some individuals in the green anole population had mutated and that helped them to survive and they successfully reproduced and the trait was passed on to the next generations.
Extensive research along the Gulf Shore has uncovered a rise in cancer rates directly linked to consumption of seafood contaminated by the Deepwater Horizon blowout. How are the pro-drilling and anti-drilling arguments affected by this discovery? A) It supports the pro-drilling argument. B) It supports the anti-drilling argument. C) It is impossible to say how this evidence will impact either argument. D) It weakens the anti-drilling argument and weakens the pro-drilling argument.
The correct answer is option (B) It supports the anti-drilling argument.
Deepwater drilling refers to the process of drilling holes in the deep sea, below the seabeds for the purpose of mining petroleum compounds. Deepwater horizon blowout was an explosion causing a huge oil offshore oilspill in the Gulf of Mexico, making it the largest accidental marine oil spill disaster in the world. It has a numerous negative effects on the marine life.
The toxic oil and its compounds released into the water during the deepwater horizon blowout has contaminated the water and affected the marine life including the phytoplanktons, zooplanktons, invertebrates, fishes and other mammals of the sea. Highly toxic chemical components such as benzene and polycyclic aromatic compounds have even caused DNA damage and mutations in the marine life. Apart from their mortality, it has also been responsible for reduced growth, diseases, impaired reproduction in the sea fauna. Thus, ingestion of such contaminated seafood grown in contaminated water can be held responsible for the rise in cancer rates. Thereby supporting the anti-drilling arguement.
Answer: It supports the anti-drilling argument
Explanation: Please Mark Brainiest :)
Elephants exhibit herding behavior. When they travel, the oldest and largest members often travel in the outer edges of the group. Why is this important to the survival of the species
Answer:
Elephants do not have many offspring, therefore they need to protect them from predators, by the older and larger members of the herd travelling on the outer edges, the young are more protected from being hunted by predators. This is not a means to enhance mating or about food, it is also not just a mere method of organizing themselves either; by travelling this way they protect the survival of the herd and species as a whole.
Explanation:
A planet is orbiting a nearby star. Suppose that the star’s gravity increases over time. What effect will this increase most likely have on the planet’s path of motion?
A.
The planet will continue to move in an elliptical orbit around the star.
B.
The planet will begin to orbit the star at a constant speed.
C.
The shape of the planet’s orbit will change from elliptical to circular.
D.
The planet’s orbital path will become smaller and its orbital period will increase.
E.
The planet will begin to orbit the star in the opposite direction.
D. The planet's orbital path will become smaller and its orbital period will increase.
The more gravity an object has, the more it will pull objects.
Answer:
The correct answer will be option D.
Explanation:
Planets orbit around the Sun (star) due to the gravity of this star which pulls down them around it. This gravity is the vital force which maintains the elliptical path of their orbit.
If this force of gravity will change it will affect the celestial bodies revolving around it like a planet as this force of gravity is directly proportional to mass and inversely proportional to the distance between them.
According to the question if the gravity of the star increases it will change the orbital path of the planets as they will be more pulled towards the sun which will decrease the distance between the star and planet and the orbital path will become smaller and the orbital period will increase.
Thus, option D is the correct answer.
Plants absorb water from the soil through their roots. _______ of this water is used for photosynthesis; _______ of this water evaporates into the air through transpiration. A. Some; most B. None; all C. All; none D. Most; some
A. I need to make this 20 characters long so yeah
Plants absorb water from the soil through their roots. Some of this water is used for photosynthesis; Most of this water evaporates into the air through transpiration. Therefore, option (A) is correct.
What is transpiration?Plants absorb water from the soil through their roots, and some of this water is used for photosynthesis, while most of this water evaporates into the air through transpiration. Transpiration is the process of water movement through a plant and its evaporation from aerial parts, especially from the leaves and stems.
It helps plants to absorb nutrients from the soil and transport them to the rest of the plant. The process of photosynthesis occurs in the leaves, and water is one of the essential components needed for this process. Therefore, only some of the absorbed water is used for photosynthesis, and the remaining water is released into the atmosphere through transpiration.
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