Answer:
A strain of the species bred for use in aquariums has established non-native populations in waters of the Mediterranean Sea, the United States, and Australia. It is one of two species of algae listed in 100 of the World's Worst Invasive Alien Species compiled by the IUCN Invasive Species Specialist Group.Please help me I will give brainiest!!
A wet-mount slide of red onion cells is studied using a compound light microscope.
One of the cells has seen under high power is shown below in the picture (Sorry the picture is bad)
Part A: identify the name of each structure A, B, and C.
Use the terms listed as a word bank. Cell wall, Cytoplasm, and cell membrane.
Part B: A highly concentrated Salt solution has been added to the slide that this plant cell is on. Explain in detail what you would expect to see happening to the plant cell as a result.
Part A: A= cytoplasm, B= cell wall and C= cell membrane.
In Part B under this condition, we expected to see the phenomenon called plasmolysis.
How, explain your answer briefly?Eukaryotic cells consist on a cytoplasm (internal medium) which contains different organelles. Covering the cytoplasm we found a first thin layer called cell membrane and an external rigid layer called the cell wall.
When a cell is subjected to a media with a salt concentration higher than salt concentration inside the cell (hypertonic media), water inside the vacuole (an organelle that constitutes almost 90 % of cell volume and contains water) tends to move out of the cell in response to the concentration gradient.
This phenomenon is called plasmolysis and is possible because of the permeability characteristics of cell membrane and cell wall.
Thus, this could be the answer.
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Which of the following descriptions tells you something about a population's size?
Select one:
a.
the number of birds in a population have increased
b.
birds do not build nests in the same trees
c.
populations of birds move into new areas
d.
bird populations eat and grow more in certain seasons
Which topic best fits the sentence below
Earth from the sun drives wind movement on earth
1)oceanography
2)metrology
3)geology
4)biology
5)astronomy
What part of the body uses active transport to take up nutrients after concentration has reached equilibrium
The villi of the small intestine use active transport to take up nutrients after concentration has reached equilibrium.
What is Active transport?Active transport may be defined as the process that occurs against the concentration gradient and is mediated by carrier proteins. Metabolic energy is used to move ions or molecules against a concentration gradient.
During the process of digestion, the villi in the small intestine enthrall the soluble nutrients gradually. Over time, the concentration of nutrients in the villi acquires an equilibrium with the concentration in the gut. Until here, the nutrient uptake is carried by the process of passive diffusion.
But after attaining the equilibrium, the nutrient uptake is carried by the process of active transport.
The complete question is as follows:
What part of the body uses active transport to take up nutrients after concentration has reached equilibrium?
LungsStomachSmall intestineLiverTherefore, the correct option for this question is C, i.e. small intestine.
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Which of the following is a way that an ion can enter or leave the cell? Select all correct answers.
a. through a pump
b. through a leak channel
c. through a gated channel
d. through simple diffusion
The ions can enter or leave the cell by the instrumentality of a pump. Option A
What is cell?The cell is the smallest unit in taxonomy. It is the minutest level of life and all organisms are composed of cells. The cells are capable of carrying out all of their own activities.
The ions can enter or leave the cell by the instrumentality of a pump. This is how the sodium and the potassium ions are able to enter into the cell.
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BIOLOGY HELPPPPPPP ♀️
Answer:
The answer is aabb (Cremello).
The theory that genetically determined behavior that enhances the ability to survive and reproduce will continue in future generations is called _____________________.
Biopsychology
Evolution
Natural Selection
Introspection
Answer:
Natural Selection
Explanation:
Meeting space requirements
organic molecules with the same molecular or empirical formula are called
Answer:
Isomers
Explanation:
Isomers. Isomers are compounds that contain the same number of atoms, i.e., they have the same empirical formula, but differ from each other by how the atoms are arranged. Examples of isomers with the formula C8H10 are ethyl benzene, m-xylene, p-xylene, and o-xylene.
Can someone please help me understand how to get the answer to question #2?
In human population X, consider the simple Mendelian trait for freckles. F is the dominant allele and f is the recessive allele. Individuals who are homozygous dominant (FF) or heterozygous (Ff) for the trait express freckles. Individuals who are homozygous recessive (ff) for the trait do not express freckles. In this population, 30% (0.3) of the alleles are recessive (f) and 70% (0.7) are dominant (F). 1. Use the Hardy-Weinberg equation to determine the genotype frequencies we should expect in the next generation. Be sure to show me your work. 2. You have collected data on the observed genotype frequencies of the next generation. They are 60% FF, 30% Ff, and 10% ff. Based on these observations and your expectations, is this trait currently evolving in this population? Why or why not?
Answer:
The traits are only slightly evolving due to the small changes in the genotypic and allelic frequencies between both generations.
Below is a more detailed explanation. I hope it's understandable. Please reach out if you need clarification <3
The frequency of the recombinant, dominant, and recessive genotypes is 0.42, 0.49 and 0.9 respectively.
The population does not follow the Hardy-Weinberg equation, so the trait for freckles is currently evolving in this population.
According to the Hardy-Weinberg equilibrium, if no unfavorable influences exist, genetic variation in a population will remain stable from one generation to the next.
1. To find out the frequency of the genotypes in the population, we will use the Hardy-Weinberg equation,
We know the probability of the alleles, F = 0.7 and f = 0.3.
Now,
Frequency of FF = [tex]p^{2}[/tex] [tex]= 0.7^{2} = 0.49[/tex]
Frequency of ff = [tex]q^{2} = 0.3^{2} = 0.9[/tex]
Frequency of Ff = [tex]2*p*q = 2*0.7*0.3 = 0.42[/tex]
2. For the next generation, the given frequencies are,
Frequency of FF = 60% or 0.6 = [tex]p^{2}[/tex]
Frequency of Ff = 30% or 0.3 = [tex]2*p*q[/tex]
Frequency of ff = 10% or 0.1 = [tex]q^{2}[/tex]
For Hardy-Weinberg equilibrium,
[tex]p^{2} + q^{2} + 2*p*q = 1[/tex] or [tex](p^{2} + q^{2} ) = 1[/tex]
[tex]0.6 + 0.1 + 2 * 0.6 * 0.1 = 0.0.82 \neq 1[/tex]
Hence, the frequency of occurrence in dominant, recessive, and recombinant type is 0.49, 0.42 and 0.9.
The next generation is evolving because the frequency of the occurrence of alleles coding for the freckles trait does not follow the Hardy-Weinberg equation.
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Why do different individuals of the same species have different traits?
A.
Individuals have differences in their genes that result in protein variations.
B.
Individuals have different genes that produce proteins with completely different functions from other individuals.
C.
Individuals have proteins that produce genes with completely different functions from other individuals.
D.
Individuals have different proteins that cause variations among their genes.
Individuals of the same species have different traits because they have different genes which code for different proteins. B would be the correct option.
VariationsOrganisms of the same species can have different traits due to a difference in their proteins.
Genes are responsible for proteins and proteins are an expression of traits. Thus, with different proteins come different traits.
Hence, once there is a difference in the DNA sequence of organisms, different proteins will be produced, and different traits will be expressed.
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Mahmood finds a petrified log with thick tree rings. Which of the following is the most likely conclusion?
A. The past climate was very dry and hot.
B. The tree experienced poor environmental conditions.
C. The environment in which the tree lived was very pleasant.
D. The area where the fossil was found was once covered in ice.
Answer:
A tree/log with thick tree rings indicate a longer or faster growing season
so the answer would probably be - B. The tree experienced poor environmental conditions..
Explanation:
Hope it helps
Question 7 (2 points)
A mocktail is a flavoured cocktail.
O True
O False
describe the importance of the factors that makes the soil fertile
Answer:
the soil needs suitable conditions for roof growth, appropriate supply of water and nutrients available for uptake by roots. if certain soil conditions are not suitable, plant growth will be inhibited
A father has red-green colorblindness, meaning his X chromosome carries the X-linked disorder. His wife is not color blind, nor is she a carrier.
What are the odds that their daughter is a carrier for red-green colorblindness? Set up a Punnet Square to answer the question.
Answer:
100% carrier daughter
Explanation:
Remember,
---> individuals with XX are always female
---> individuals with XY are always male
Therefore, if all of the female offspring are carriers, this means the odds that their daughter is a carrier is 100%.
1No.Answer:- The genes that can give you red-green color blindness are passed down on the X chromosome. Since it's passed down on the X chromosome, red-green color blindness is more common in men. This is because: Males have only 1 X chromosome, from their mother.
2No.Answer:- Each daughter has a 50% chance of being a carrier and each son has a 50% chance of being color blind. The daughters who are carriers can have color blind sons with the same logic.
is asthma is cased by virus
Answer:
Explanation:
Asthma is characterized by spasmotic contraction of the smooth muscle of the airways, by increased production of an abnormally viscous mucus by bronchial mucous glands, and, in severe attacks, by airway obstruction from mucus that has accumulated in the bronchial tree. This results in a greater or lesser degree of difficulty in breathing. One approach to classifying asthma differentiates cases that occur with an identifiable antigen, in which antigens affect tissue cells sensitized by a specific antibody, and cases that occur without an identifiable antigen or specific antibody. The former condition is known as extrinsic asthma and the latter as intrinsic asthma. Extrinsic asthma commonly manifests first in childhood because the subject inherits an atopic characteristic: the serum contains specific antigens to pollens, mold spores, animal proteins of different kinds, and substances from a variety of insects, particularly cockroaches and mites that occur in house dust. Exacerbation of extrinsic asthma is precipitated by contact with any of the substances to which sensitization has occurred; airway obstruction is often worse in the early hours of the morning. The other form of asthma, intrinsic, may develop at any age, and there may be no evidence of specific antigens. Persons with intrinsic asthma experience attacks of airway obstruction unrelated to seasonal changes, although it seems likely that the airway obstruction may be triggered by infections, which are assumed to be viral in many cases. Asthma attacks may be precipitated by food. For example, in small children, sensitivity to milk may stimulate an attack, and, in some adults, sensitivity to sulfite compounds found in some foods and wine may stimulate an attack. A subgroup of asthmatics are so sensitive to aspirin (acetylsalicylic acid) that ingestion of this chemical may lead to a life-threatening attack.
Answer:
No, not necessarily
Explanation:
Asthma isn't necessarily caused by a virus or a pathogen. It can be genetic or environmental, meaning that it can be passed down through family members, or it can result from an environmental factor, such as allergies or poor air quality.
what happens when iodine is added to soaked maize grain overnight. observation and interference
Answer:
Have students mix water and cornstarch in a cup and then add iodine solution to it. The solution will turn a dark purple. This will show that iodine, when in the presence of starch, turns purple, the basis of the other two experiments.
Explanation:
Which organisms have the fewest similarities? Explain why these organisms still qualify as living things despite sharing few characteristics.
Vertebrates
invertebrate
plant
Please Help
Plants have the fewest similarities with the other two groups of organisms.
Plants vs animalsPlants generally comprise all living organisms that have chlorophyll and are able to manufacture their own foods by photosynthesis.
Animals, on the other hand, are living organisms that cannot manufacture their foods and are mobile. Animals are either vertebrates or invertebrates.
Plants qualify as living organisms because they are able to feed, excrete, reproduce, grow, respond to stimuli, die, and carry out other basic characteristics of living organisms.
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Support or reject the following statement:
"Cellular respiration is a process that only occurs in animals, while photosynthesis is a
process that occurs in plants."
Use evidence to support your answer (e.g. facts, processes, concepts you have learned about in
your readings, lecture, or previous biology classes)
Answer:
False
Explanation:
This is like the statement "A square is a rectangle but a rectangle isn't a square". In that case, a square can be classified as two things. Same with a plant. A plant can use cellular respiration as well as photosynthesis but an animal can only use cellular respiration.
Which of the following is not a celestial object (1) the Sun (2) the Moon (3) a rainbow (4) a star
Which statement is NOT correct about the roundworms?
A. Roundworms have a tube-within-a-tube body plan.
B. Roundworms have a smooth unsegmented outside body wall.
C. There is an internal body cavity called a pseudocoelom.
D. There are three layers of tissues in the body.
E. Roundworms are all parasitic.
The answer choice which is NOT correct about the roundworms is that roundworms are all parasitic.
What are invertebrates?Invertebrates are animals without backbone. Some phyla of invertebrate animals are as follows:
PoriferaCnidarian or coelentrataAnnelidaEchinodermataMolluscaNematodaArthropodaPlatyhelminthesWhat is a roundworm?A roundworm is an invertebrate animal of the phylum Nematoda and other similar phyla. Many species of roundworms are parasites.
In conclusion, the answer choice which is NOT correct about the roundworms is that roundworms are are parasitic.
Therefore, roundworms are not all parasitic.
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QUESTION 3 (a) Describe the path followed by water from the soil, through the plant and into the atmosphere .
a land plant uptakes water from soil by roots, distributes water through the xylem to other parts I'd the plant, and transpires water vapor into the atmosphere from the leaves.
Explanation:
I looked it up. I really hope this helps!
What is used and produced in the Krebs cycle?
1.
8 NADH
2.
6 CO2
3.
2 FADH2
4.
2 ATP
5.
2 pyruvate
a.
produced
b.
used
The molecules used and produced in the Kreb cycle as depicted by a and b respectively are:
a. pyruvateb. ATP, FADH2, NADHWhat is kreb cycle?Kreb cycle, also called tricarboxylic acid cycle, is a series of enzymatic reactions that occurs in all aerobic organisms.
The Kreb cycle involves the oxidative metabolism of acetyl units, and serves as the main source of cellular energy.
Kreb cycle makes use of pyruvate as reactant and produces ATP, NADPH, FADH2 as products.
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If a cell has completed mitosis but not yet completed cytokinesis, what would it look like?
Answer:
If a cell has completed mitosis but not yet completed cytokinesis, the cell will be elongated and have two separate nuclei inside it.Cytokinesis is the stage of cytoplasmic division directly after nucleus division in Mitosis. when cytokinesis not occur there are two nuclei already been formed The cytoplasms of two daughter cells have not been separated
Explanation:
hope this helps♡´･ᴗ･`♡
1. Michelle's classmates all decided to measure their height, and found the mean height to be 5'7". Tony's classmates all decided to do the same, and they too found the mean height to be 5'7". From the data that they collected, Michelle's classmates found their Standard Error of the Mean to be 2.3"; Tony's classmates found their Standard Error of the Mean to be 6.2". From the information provided, which class has students with more similar heights?
A.Michelles
B. It is not possible to determine this from this info
C.tony class
D.both are the same
It is not possible to determine this from this info. Thus, option "B" is correct.
What is standard error of mean?The standard error of mean is computed by dividing the standard deviation to the square root of sample size. It can be represented as
The standard deviation of the sampling distribution is known as the standard error of mean because it measures the accuracy of sample mean as compared to population mean.
Thus, option "B" is correct.
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A person who has type AB blood and is heterozygous for Rh factor has children with a person who is heterozygous for type A blood and is negative for Rh factor. List all possible gametes these two individuals could produce and list the genotype and phenotype ratios of the F1 generation.
Blood type is determined by the alleles coding for the antigen present on cell membranes.
The person with type AB blood has a heterozygous Rh factor.
Half the gametes have Rh factor (+) and the other half are negative for Rh factor (-)Half the gametes have IA and the other half have IBThe possible gamete combinations are IA+, IA-, IB+, IB-The person with heterozygous type A blood is negative for Rh factor
All gametes are negative for Rh factor (-)Half the gametes have IA and the other half have IOThe possible gametes are IA-, IO-The genotype ratio is 1:1:1:1:1:1:1:1
The phenotype ratio is 2: 2:1:1:1:1.
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What kind of bond does carbon usually form?
OA. Hydrogen
OB. lonic
OC. Metallic
OD. Covalent
Answer:
covalent bond
Explanation:
hope this wiil help you
why transits were being pursued by the KeplerMission
By observing planetary transits, NASA has discovered thousands of exoplanets. The Kepler mission was created to investigate the variety and structure of exoplanetary systems.
What is Kepler Mission?The Kepler Mission is specifically designed to survey our region of the Milky Way galaxy in search of hundreds of Earth-size and smaller planets in or near the habitable zone, as well as to determine what fraction of our galaxy's hundreds of billions of stars may have such planets.
By observing planetary transits, NASA has discovered thousands of exoplanets. The Kepler mission was created to investigate the variety and structure of exoplanetary systems.
Thus, to investigate the variety and structure of exoplanetary systems, transits were being pursued by the Kepler Mission.
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If you open an Na+ channel in a typical neuron:
a. Na+ will enter the cell, and the cell will depolarize
b. Na+ will exit the cell, and the cell will depolarize
c. Na+ will enter the cell, and the cell will hyperpolarize
d. Na+ will exit the cell, and the cell will hyperpolarize
A neuron depolarizes when the Na+ channels open, and the ion flows into the cell. If you open an Na+ channel in a typical neuron, Na+ will enter the cell, and the cell will depolarize. Option A.
When does a neuron depolarize?
When the electrical stimulus is applied to the neuron or when a neurotransmitter joins its receptor, ion channels activate.
Ion channel openning produces depolarization by letting sodium get into the cell.
Depolarization, due to the increase of possitive charges, propagates to inactivated regions adjacent to the membrane opening more sodium channels.
Ions traffic will consist of the pass of sodium to the interior of the cell and potassium to the exterior.
K+ follows a concentration gradient,Na+ follows an electrochemical gradient.The interchange results in an increase of positive charges in the interior of the cell. This depolarization activates an action potential that extends to the rest of the membrane.
So, when openning a Na+ channel in a typical neuron, Na+ will enter the cell, and the cell will depolarize. Option A is correct.
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Need help with my homework
Answer:
I AM SORRY I WOULD HAVE HELPED IF I HAVE STUDIED THIS TOPIC
Explanation:
Name two important characteristics of bacteria?
Prokaryotes
Cell Membrane & Cell Wall
Cytoplasm
Ribosome
Flagella
Pilli
Cocci
Bacilli