Tonicity in cells depends on both the concentration of solute outside the cell and the concentration of solute inside the cell
Tonicity is a concept used in biology that defines the osmotic pressure ( pressure that stops the fluids from entering or leaving cells). This pressure is defined by the concentration of solute (substances dissolved in the liquid) outside and inside the cell.
In this context, the cell is classified as isotonic if there is a balance between the concentration outside and inside; hypertonic if the concentration outside the cell is higher, which causes the cell to shrink of hipotonic if the concentration outside is lower, which causes the cell to swell.
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Help plz for the 3 of emmm!
Plzzzz and thank you!
Answer:
1.C
2.A
3.B
Explanation:
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A liver cell has a volume of 5000 μm3. Its total membrane area, including the inner membranes lining organelles as well as the cell membrane, is 110,000 μm2. A cell in the pancreas that manufactures digestive enzymes has a volume of 1000 μm3 and a total membrane area of 13,000 μm2. Which cell is probably more efficient in carrying out activities that require extensive membrane surfaces? Why?
Answer:
The liver cell, since it has a higher surface to volume ratio will be more efficient in carrying out activities that require extensive membrane surfaces such as solute transport.
Explanation:
The cell surface area to volume ratio is important in order to determine the efficiency of the cell in carrying out its metabolic activities. The surface area of a cell is bounded by the cell membrane whose function in addition to many others is to let nutrients into the cell and let waste out of the cell. The rate of activity of a cell depends on its volume. The larger the volume the more the active the cell is. Since volume increases much more when compared to area, the ratio of the surface area of a cell to its volume becomes smaller with increase in volume of the cell.
Considering the liver cell and the pancreas cell in the question, the cell's surface area to volume ratio is given as follows:
Liver cell: volume = 5000 μm³; area = 110000 μm²
surface area to volume ratio = 110000 / 5000 = 22 : 1
Pancreas cell : volume = 1000 μm³ ; area = 13000 μm²
Surface area to volume ratio =13000 / 1000 = 13 : 1
The liver cell, since it has a higher surface to volume ratio will be more efficient in carrying out activities that require extensive membrane surfaces such as solute transport.
5. Which of the following explains a way in which metamorphic rocks are formed?
a. through intense changes in heat
b. through intense change in pressure
c. through chemical changes
d. All of the above explain ways in which metamorphic rock can occur.
Answer:
D. All of the above explain ways in which metamorphic rock can occur.
Reverse faults are the result of tension.
True or false?
Answer:
can you helppp me with dna
the role of a producer is to :
A)eat orher consumer
2)provide food for carnivores 3)make carbon dioxide
4)provide food for themselves and other organism
Answer:
4)provide food for themselves and other organisms
Explanation:
The island spotted skunk and the island fox are both predators of the island
deer mouse (the prey). How could these two predators establish different
niches and still prey upon island deer mice? *
A. the island spotted skunk hunts at different times than the island fox
B. the island spotted skunk hunts in the same area as the island fox
C. the island fox eats only cherries instead of deer mice
D. the island deer mice swim to a different island to avoid predators
Answer:
I think the answer is A because if they hunt at the same time they will kill themselves
DNA contains the code for for constructing which molecules?
Lípids
Proteins
Carbohydrates
Suzars
Question 13
6.7 pts
Answer:
proteins
Explanation:
A scientist performed an investigation involving a reaction that produced Al,(50), How many sulfur atoms are represented in this formula? A 1 atom B 3 atoms с 7 atoms D 9 atoms
Answer: B, 3 atoms
Explanation: The number of atoms for each element in the formula are calculated by looking at the subscripts and the coefficient. The calculation is given as Al atoms =2x1, S atoms = 3x1 and O atoms = 3x4.
What is the phylum and class of a squid
Answer: phylum Mollusca, class Cephalopoda
Explanation:
Mitosis is characterized by- check all that
apply.
2 identical cells
ouTube
(2n)
Diploid
1 division
2 divisions
Somatic-body cells
Answer:
the only one that doesn't apply is 2divisions
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Which of these would have the least effect on natural selection in a
subspecies of giraffes that is geographically isolated from other
subspecies of giraffes?
A. available niches
B.existing predators
C.chromosome number
D.available food resources
Answer:
C. chromosome number
Explanation:
Chromosome number is not a factor that influences natural selection. The other three choices represent factors that drive the process of natural selection.
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Analogy and homology are important concepts used in comparing species. Traits are homologous if they are derived, evolutionarily and developmentally, from the same source structure. Traits are analogous if they have similar functions but are derived, evolutionarily and developmentally, from different source structures. A classic example of analogous structures is insect wings and bat wings. Which of the following pairs of structures are analogous and which are homologous?
a. Dorsal fins of porpoise and a salmon
b. Flippers of porpoise and pectoral fins (front fins) of salmon
c. Joined leg of ladybird beetle and a robin
d. Rhesus monkey's tail and human's coccyx
e. Bright red bracts of poinsettia and green leaves of rose
f. Red bracts on a poinsettia and red petals on rose
Answer:
a. analogous
b. homologous
c. analogous
d. homologous
e. homologous
f. homologous
Explanation:
a. Analogous. Porpoises are mammals while salmon are fish. In this case, fins are analogous structures that evolved separately in both groups.
b. Homologous. Pectoral fins evolved from the forearms of tetrapods, and early tetrapods evolved from fish.
c. Analogous. These structures evolved independently through convergent evolution in both groups.
d. Homologous. They are homologous structures that were inherited from a common ancestor (primates).
e. Homologous. Bright red bracts (modified leaves) of poinsettia and green leaves of rose share a common ancestor (i.e., angiosperms).
f. Homologous. They are homologous structures that were inherited from a common ancestor (i.e., angiosperms).
What does the mnemonic device "Did King Philip Come Over For Good Spaghetti" mean, in terms of Taxonomy and Classification?
Answer:
See the answer below
Explanation:
The mnemonic is used to represent the major taxonomic categories used in classifying living organisms. Each of the words in the sentence (except 'Did') represents the categories as follows:
King - Kingdom
Philip - Phylum
Come - Class
Over - Order
For - Family
Good - Genus
Spaghetti - Species
The kingdom represents the highest category of classifying living organisms. Each organism has to belong to one of the 5 major kingdoms - monera, protista, fungi, plant, or animal. Phylum comes after the kingdom, followed by class, order, family, genus, and species. The lower the category, the lower and more similar the organisms they contain.
What is one of the causes of mechanical weathering? A acid rain B oxidation C animal actions D carbon dioxide
Answer:
The answer is animal actions
Explanation:
It said it in the guided notes associated with the lesson.
The answer is C animal actions
Describe the special relationship God designed between plants and animals. Use complete sentences and proper grammar.
Answer:
https://answersingenesis.org/biology/plants/
Explanation:
This should help!
In the lungs, what can affect the suface area
Are vesicles involved in passive transport? please explain
Answer:
Yes, as they have/ require no energy then they pass through the plasma membrane, and is done due to some molecules that are far too largem
4. All of the offspring of an organism have the same genetic material, which is identical to the
parent organism. From this, we can conclude that this organism -
a. makes its own food
b.is unicellular
c. live in a marine habitat
d reproduces asexually
5. Bacteria reproduce asexually by a process called
a. Meiosis
b. binary fission C. replication d. regeneration
Describe how changes in the lining shown in the diagram adapt it for its function if an egg is fertilised
Answer:
The lining in the womb becomes thicker and spongy to protect the embryo/foetus in all stages of life inside the womb and to stop damage/harm coming to it
Explanation:
How are traits passed from parent(s) to offspring in sexual vs. asexual reproduction?
Answer:
In sexual reproduction, traits will be taken from both parents, so the child will be a mix of traits from the father and the mother
In asexual reproduction, there is only one parent, so the child will be a genetical replica of the parent
Submit your detailed description of five ways animals contribute to your life and the lives of those around you.
Answer:
2.1 As food.
2.2 For clothing and textiles.
2.3 For work and transport.
2.4 In science.
2.5 In medicine.
2.6 In hunting.
2.7 As pets.
2.8 For sport.
Could you explain the roles and relationships among producers, consumers, and decomposers, and identify the distinguished characteristics of several common relationships among organisms in an ecosystem near you?
Answer:
A consumer may also eat other consumers as food. When producers and consumers die, the Decomposer will come along to decompose (break down) the bodies of the dead producers and consumers into smaller chemicals - in short treating them as a food source
Explanation:
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The producers, consumers, and decomposers are related to each other in an ecosystem in a specific way.
What is an Ecosystem?The interaction between the organisms of different species plays their role in a systematic way as decided by natural selection, which is known as the Ecosystem.
Producers use light energy and inorganic matter to produce food. They are always present first in the ecosystem. Consumers take energy from plants known as herbivores, and also from herbivores known as Carnivores. Decomposers convert dead organic matter into inorganic matter. This inorganic matter helps producers perform metabolic activities. And finally, this cycle goes on.
Therefore, the producers, consumers, and decomposers are related to each other in an ecosystem in a specific way.
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6. What blood type is shown in the picture?
A
Rh
B
Answer:
B
Explanation:
Blood type is shown in the picture is B positive.
What do you mean by blood type?
"A blood type is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells."
What are the main blood types?
There are 4 main blood types or groups defined by the ABO system:
blood group A – has A antigens on the red blood cells with anti-B antibodies in the plasma.blood group B – has B antigens with anti-A antibodies in the plasma.blood group O – has no antigens, but both anti-A and anti-B antibodies in the plasma.blood group AB – has both A and B antigens, but no antibodies.
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how do government subsidies contribute to inefficient use of water?
Answer:
They dont lOlololoLOlololOl
Explanation:
pls help this is major plssssssss help!
I will mark brainliest!! THANK YOU! Students are discussing differentiation of cells in an organism. Which student has to most accurate description of differentiation?
Answer:
Student 2
Explanation:
I think it is student 2 because differentiation is the dividing and changing of embryonic stem cells into cells that are specialized in structure and function. Some stem cells form liver cells, some heart cells, muscle cells.
Answer: Student 1: differentiation occurs during reproduction.
Explanation:
The process of cell differentiation starts with the fertilization of the female egg. As soon as the egg is fertilized, cell multiplication is initiated resulting in the formation of a sphere of cells known as the blastocyst.
The mixing of fats with water, assisted by molecules that have both nonpolar and polar ends, is called
Answer:
The mixing of fats with water, assisted by molecules that have both nonpolar and polar ends, is called emulsification
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Tropisms/Turgor pressure/Stimulus Check The plant cells in the diagram below are full of water in their vacuoles, creating a force in the cell. Vacuole Cytoplasm This force will cause the plant to - O stand upright. grow towards light. grow away from light.
The inheritance of biological characteristics is determined by individual units called ___, which are passed from parents to offspring. Where two or more ___ of the gene for a single trait exist, some alleles may be ___ and others may be recessive. In most ___ organisms, each adult has ___ of each gene. These genes ___ from each other when ___ are formed. Alleles for different genes usually segregate ___ of each other.
Answer:
genes, alleles, dominant, sexually reproducing, two copies, segregate, gametes, independently
Explanation:
The inheritance of biological characteristics is determined by individual units called *genes*, which are passed from parents to offspring. Where two or more *alleles* of the gene for a single trait exist, some alleles may be *dominant* and others may be recessive. In most *sexually reproducing* organisms, each adult has *two copies* of each gene. These genes *segregate* from each other when *gametes* are formed. Alleles for different genes usually segregate *independently* of each other.
The inheritance of biological characteristics is determined by individual units called genes, which are passed from parents to offspring. Where two or more alleles of the gene for a single trait exist, some alleles may be dominant and others may be recessive. In most se-xually reproducing organisms, each adult has two copies of each gene. These genes segregate from each other when gamates are formed. Alleles for different genes usually segregate independently of each other.
GenesGenes are the unit of inheritance. It is the basic functional unit of heredity. Genes are made up of DNA.
AllelesAlleles are variant form of a genes
Dominant allelesDominant alleles are variation of a gene that will produce a certain phenotype, even in the presence of other alleles.
GamatesThey are male and female reproductive se-x cells
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Cloning ____?
1. Results in offspring that is genetically identical to its surrogate mother.
2.Removes the nucleus from an egg call and replaces it with the nucleus from another organism.
3.Creates offspring with a combination of traits from two organisms.
4.Can only be done with simple cells like bacteria.