Answer:
1. plasma membrane
2. nucleus
3. central vacuole
4. Cytoplasm
Explanation:
Which is a type of star system?
dim stars
galaxies
wobbling stars
globular clusters
The type of star system is galaxies.
What is star system?Star system is a part of solar system that comprises of different types and shapes of stars each performing it function which orbit around each other and bound by gravitational force.
Therefore, The type of star system is galaxies
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Victor has been studying the vascular systems of plants. He wanted to find out if food coloring would travel up the stalk of celery faster if the temperature of the water increased. Victor set up his experiment with three cups of colored water at different temperatures, three equal sized celery stalks, and a stopwatch. Cup A was filled with colored water at 21 C. Cup B was filled with cold colored water at 4 C, and Cup C was filled with warm colored water at 30 C. One celery stalk was placed in each cup at the same time. Victor timed how long it took the colored water to travel to the leaves at the top of the celery stalk. He measured the time in minutes. What is the independent variable
Answer:
temperature
Explanation:
The independent variable would be the colored water at different temperatures.
The independent variables are changeable or controllable variables supplied directly by researchers in the course of experiments. They produce effects on the dependent variable and are thus referred to as the 'cause' variable. The dependent variables are referred to as the 'effect' variables because their values vary based on that of the independent variables.
In this case, the only controlled variable of all the variables supplied by Victor is the temperature of the colored water. Changing the temperature of the colored water is expected to have effects on the time it will take for the colored water to travel to up the stalk of celery. Hence, the temperature is considered as the independent variable while the time it takes for the colored water to travel to the leave would be the dependent variable.
The slow depolarization of the pacemaker cells is caused by the opening of the:_______.
Answer:
The slow depolarization of the pacemaker cells is caused by the opening of the non selective cation channels.
Explanation:
Pacemaker cells are specialized cardiac muscle cells with the task to create the rhythmic pulses that make the cardiac muscle contract properly, functioning as a whole and not as independent contractile cells.
One of the things that differentiate pacemaker cells from regular cardiomyocytes is that pacemaker cells slowly depolarize by themselves. This happens because when these cells are in phase 4, in a state of hyperpolarization, the 'funny current' appears to begin depolarizing the cell again.
Hyperpolarization usually occurs because there's an outflux of potassium ions (which makes the inside of the cell much more negative than the outside of the cell) but, in pacemaker cells, the membrane becomes less and less permeable to potassium, which ends up decreasing the outflux of this ion. Along with this change in potassium's electrical conductance, the funny current increases the permeability of sodium, which means that there's also a sodium influx happening at the same time, helping in the depolarization process.
This mixed sodium and potassium permeability is one of the key features of the funny current, and is possible thanks to the opening of non-selective cation channels in the membrane that allow the passing of any cation following their specific chemical gradients.
7. Chemical or physical factor that determines the number
of organisms in a population
Answer:INTERSPECIFIC COMPETITION
Explanation:
The physical factor that determines the number of organisms in a population is ; Interspecific competition
Interspecific competition in a population is a competition that exists between organisms of different species, while the competition that occurs within organisms of the same specie is termed intraspecific competition.
During Interspecific competition the different species compete for food, water and Habitat which every organism needs to survive, and in most cases the stronger specie overruns the weaker species and this will lead to the depletion in the number of the organisms of the weaker specie and an increase in the number of the stronger specie within the population.
Hence we can conclude that The physical factor that determines the number of organisms in a population is ; Interspecific competition .
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Using binomial nomenclature format, identify the scientific names written incorrectly and write them correctly. (1 pt.) 1.Pseudomonas aeruginosa 2.Escherichia coli 3.staphylococcus aureus 4.Proteus vulgaris i need you guys help?
Answer:
Pseudomonas aeruginosa
Escherichia coli
Staphylococcus aureus
Proteus vulgaris
Explanation:
Binomial nomenclature means a system of using two terms to describe the name of an organism.
It is a generally accepted system of nomenclature in biology. The first term represents the genus of the organism while the second name represents its specie.
The genus name begins with an uppercase letter while the species name is written in lowercase letters throughout.
The names of organisms in the answer section have been correctly written according to these rules.
What sequence elements could be looked for within the inserted sequence that would help place it in one of the three families?
Answer:
DNA transposons, viral-like transposable elements, and non-LTR retrotransposons
Explanation:
Transposable Elements (TEs) are genetic mobile elements that can change its position within a genome, thereby producing mutations at the genomic sites where they are inserted. According to their composition and structure, TEs can be divided into three main types: DNA transposons, viral-like transposable elements, and non-long terminal repeat (non-LTR) retrotransposons (also known as polyA retrotransposons). In the first place, DNA transposons are composed of conserved inverted repeat sequences at both ends of the element which are surrounded by target site duplications (TSDs). Moreover, viral-like TEs contain LTRs and they encode reverse transcriptase enzymes. Finally, non-LTR retrotransposons contain a poly(A) tail at the 3′ end, but they don't have inverted repeats.
Which of the following defines Statutory Law? *
1 point
laws created by government agencies
laws that come from judges' decisions that rely on common sense and previous
cases
laws passed by Congress and state and local governments
laws based on the constitution
Describe the
Inter relation
bla
living and living thing in a tabular form
Explanation:
inter relation
living and non living
Please help me with these questions finish the sentence, 20 points
Answer: From the onlookers, the two are clearly far away. The two girls are Kelveys and the talker: "Many kids including Burnells do not even talk to them, they passed through Kelveys in the air ... Kelveys everyone ran away" (Mansfield 203) Negative feelings affect not only my own emotions, but for very young people there is the possibility that it will affect not only the other people but also how to handle themselves.
IMHORRIBLEATMATH44 avatar
In Katherine Mansfield's Dolls House, our theme is class, prejudice, connection, hope, appearance, and equality. From her "pigeon's nest" and "other stories" series, the story is told by an unknown narrator of a third party, after reading the story, the reader will find that Mansfield is exploring the theme of the classroom I notice.
IMHORRIBLEATMATH44 avatar
In addition to Kezia, the Burnell family thinks that himself is higher than others, especially in Kelveys. Burnells seems to define himself through his social position (or class), and Mrs. Kelvey is a working-class woman and Mr. Kelvey can happen in prison, Burnells himself as Kelveys I believe it is higher. There is also a sense that Burnel refuses Kelvey as they may be different from them.
Explanation:
A peptide has the sequence of Gly-Ser-Glu-Leu-Ala-His-Gly-Arg-Leu-Ala-PheCys-Leu. (pKR=4.25, 6.0, 8.2, 12.5. Assume pKa’s of amino terminus and carboxyl terminus are 9.6 and 2.3, respectively.) The PI of the peptide is close to:_______
a. 7.1
b. 7.8
c. 5.1
d. 8.2
e. 10.3
Answer:
The correct answer is option a. "7.1".
Explanation:
One easy way to determine if a peptide sequence is acidic, basic or neutral is to check for the number of amino acid residues that are acidic, basic or neutral. In this case, most amino acid residues are neutral, which mean that under neutral conditions they have a pKa close to 7.0. Particularly, the content of 3 leucine, 2 alanine and 2 glycine residues determines that the peptide have a pI of around 7.1.
Light behaves in specific ways. It can be reflected, refracted, or absorbed, and under certain conditions, run into different kinds of interference. Which explanation best describes why light is refracted as it enters water?
A. The light bends when it enters water due to its reflection.
B. The speed of light remains the same as it moves from air to water, causing the light to reflect.
C. The speed of light increases when it enters a different medium, but it doesn't bend.
D. The speed of light changes as it moves from air to water, causing the light to bend.
Answer:
D
Explanation:
Refraction is generally defined as the change in the direction of a wave as it travels from one medium to another. Light is a form of wave and light refraction is caused by a change in the speed of light as it moves from air to water, causing the light to bend in the process. The medium of travelling has to be transparent.
The change in the speed and direction is due to the variability in the refractive index of media. Light travels faster as it moves from a medium of higher refractive index to a medium of lower refractive index and vice versa.
The correct option is D.
What are the three products of the light reaction of photosynthesis
Photosynthesis uses light energy, carbon dioxide, chlorophyll and water to produce oxygen, glucose and water.
Which of the following statements describes in the correct order the events that may take place after an eastern forest burns down? Bare soil is exposed, weeds and grasses colonize, perennial plants are established, shrubs appear, trees appear, and forest results Bare soil is exposed, weeds and grasses colonize, perennial plants are established, shrubs appear, trees appear, and forest results Bare soil is exposed, perennial plants colonize, grasses and weeds are established, shrubs appear, trees appear, and forest results Bare soil is exposed, perennial plants colonize, grasses and weeds are established, shrubs appear, trees appear, and forest results Bare rock is exposed, lichens colonize, grasses are established, shrubs appear, and trees appear Bare rock is exposed, lichens colonize, grasses are established, shrubs appear, and trees appear Bare soils is exposed, shrubs colonize, trees appear, weeds and grasses are established and mature forest results
Answer:
Bare soil is exposed, weeds and grasses colonize, perennial plants are established, shrubs appear, trees appear, and forest results
Explanation:
This question describes a secondary succession, which is a colonization that occurs after a natural disaster has caused damage to an ecosystem. In secondary succession, SOIL, is already present, hence, there is rapid initial recolonization by GRASSES AND WEEDS.
The colonization of grasses and weeds is soon followed by the establishment of PERENNIAL PLANTS, after which SHRUBS appear, then TREES until a stable or climax ecosystem of FOREST results.
During meiosis, homologous chromosomes exchange genetic material. This exchange of genetic material -
increases the genetic variation
increases the genetic variation
increases the haploid number to the diploid number
increases the haploid number to the diploid number
reduced the probability of mutations
reduced the probability of mutations
reduces the diploid number to the haploid number
reduces the diploid number to the haploid number
Answer:
Explanation:
No.4
Answer:
I believe this could be reduces the diploid number to the haploid number.
Explanation:
Hope this helps! :)
Why do you think people
often compare the
changes between
childhood to adulthood to
the butterfly's life cycle?
Answer:
Because the life cycle resembles to that of other organisms
1-EGG
2-LARVA
3-PUPA
4-ADULTHOOD
Explanation:
Can anyone pleaseeeee help me like please!!!!!!!!!! :(((
Answer:
I think its D
Explanation:
because the mitochondria makes energy and the cell wall lets things in and out of it
Answer:
D
In animal cells, the cell membrane allows for materials in and out of the cell, while the mitchondria uses nutrients to make energy (ATP) for the cell
Explanation:
To figure out how to eliminate answers you need to know what the functions of the cell wall and the mitchondria are.
The mitochondria is referred to as the power house of the cell meaning that it creates energy for the cell.
The cell wall allows things in and out and is the protector of the cell.
hope this helped and let me know if it was correct! <3
Freshwater sponges are classified in which class?
Calcarea
Chordata
Hexactinellida
Demospongia
Answer:
fresh wtaer spknges are classified in Demospongiae
Which of the following is an example of a species adapting to changing
conditions in their ecosystem?
A. Amur leopard populations declining because of the spread of humans into their
habitat
B. Longer walrus" tusks because the oysters they eat burrow deeper into the sea floor
Answer:
b
Explanation:
their tusks allow them to get food which is an adaptation for survival
Answer:
The correct answer would be B.
Explanation:
B is the correct answer because the walrus's tusks gives them an advantage to capture the oysters that are deep in the sea floor.
What is wrong with this cell diagram ? (Giving brainliest)
Answer:
C
Explanation:
It has a round shape so obviously plant cell. You can see the vacuoles, mitochondria, and E.R., but it's missing its nucleus.
Answer:
D
Explanation:
A plant cell would have a cell wall to make the cell structured and more rectangular, so the other answer is incorrect. This is an animal cell. You can tell because there is no cell wall and the vacuoles are smaller (plant cells usually only have 1 large vacuole), and there are no chloroplasts. There is no nucleus pictured and since it is an animal cell, the cell doesn't need chloroplasts. That means that the answer is D.
Which of the three traits considered in this film (bipedality, extensive tool use, and large brains) were present in the 3.2-million-year-old Australopithecus fossil (Lucy)?.
Answer:
The bipedality
Explanation:
One of the things the discovered fossil signified was that human bipedality was more ancient than the large brain size because Lucy actually had a small skull which could indirectly be translated to small brain size.
NOTE: Bipedality can be described to mean the ability of an organism to move about with two legs. Hence, it must have been discovered that Lucy had two legs.
Which of the following represents a duplication in the DNA sequence A-G-T-C-T? 1. T-C-A-G-A 2. A-G-G-T-C-T 3. A-G-T-C-T 4. G-A-C-T-T )Helppp
What 3 traits have led to human evolution? And why?
Answer: bipedalism, brain expansion, and culture
Explanation:
TIME REMAINING
Which homeostatic process moves particles against a concentration gradient?
dynamic equilibrium
passive transport
osmosis
active transport
Answer:
active transport
Explanation:
.
Answer:
D. active transport
Explanation:
What are the reactants of cellular respiration and also the products of photosynthesis?
A.6 water, 6 cartoon diode, and sun
B.1 glucose and 6 oren za
C.38 ATP. 6 water, 6 carbon dioxide
Answer:
I think it's C
Explanation:
pls help I will mark as brain something
Answer:
Flora refers to the natural vegetation including plants, fungi, algae in a particular geographical region. Fauna refers to the animals life living in a particular geographical area or region.
Gram , coccus, chains, catalase -, gamma hemolysis, glucose fermentation, grows slightly on MSA (salt tolerant) other test: mannitol fermentation test results: >80% which other test(s) are recommended to further increase the accuracy of your identification This organism is .
Answer:
The name of the test which can increase the accuracy of the identification of the organism is Coagulase testing.
Explanation:
Given the points stated in the question, the organism most likely under scrutiny here is Staphylococcus Aureus. Science has shown that it is the most harmful of all of the many different staphylococcal bacteria that there is.
The best test for differentiating and identifying Staphylococcus Aureus apart from other types of other Gram-positive cocci is the coagulase test.
The coagulase test checks to see if the microbe can produce an exoenzyme called coagulase.
Coagulase - an exoenzyme, is usually produced by bacteria. This enzyme triggers the coagulation of blood or plasma.
Only the pathogenic or disease-causing forms of staphylococcus can produce this enzyme. The enzyme is qualified by the suffice "exo" because the enzyme is secreted externally and not internally. Also, its functions are external, not internal.
The Coagulase testing is of two types:
The Slide TestThe Tube TestIt is usually safer to use the test tube method. If one must rely on the slide test, the results must be read quickly as it is prone to false positives.
Cheers
Why did people in England feel that it was reasonable that America paid more taxes?
Answer:
See below
Explanation:
The people in England felt that it was acceptable to make to colonists pay taxes because they felt that they still owned the colonists and could push them around as they wished. They also needed the money to pay for war debt. It was also a reaction to the protests that the Americans were performing.
Which of the following is in the order of increasing bond strength?
a. Hydrogen, ionic, covalent
b. Hydrogen, covalent, ionic
c. Ionic, hydrogen, covalent
d. Covalent, ionic, hydrogen
Answer:d. Covalent, ionic, hydrogen
Explanation:
Answer:
Covalent, ionic, hydrogen
Efficiency of a lever is always less than hundred percent. Give reason.
Answer:
There is no simple minchine on earth(aleast right now) has an efficiency of 100%
Explanation:
Why? Because anything has frictions, according to the AP physic book, that "Friction is the resistance to motion of one object moving relative to another."
btw, your on the wrong subject
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Red
Think critically A restaurant owner wants to serve fresh-cut fruit. What factors might be considered in choosing a recipe and preparation method
Answer:
Explanation:
1.Oxidation- some fruit after cutting on exposure to air begin to oxidate this leads to a change of color, this color change could range from light brown to dark brown in some fruits such as apple this could make it unappealing to to the consumer.
2. Shelf life- How long can the fruits start after exposure to air before it begins to loose its taste assuming they are not consumed immediately. This have to considered in selecting fruits
3. Time- How long will it take to prepare and make the fruits ready, some fruits requires some thorough cleaning, professional cutting skill
if all will be available and will meet up the time required for the fruits to be served.
All this are some of the factors needed to be considered
