Answer:
The correct answer is - option A.
Explanation:
Reproductive barrier is a biological difference between two species that do not allow them to interbreed. Type of reproductive barrier is decided by the trait or barrier that prevents them to interbreeding.
habitat isolation takes pace when the prezygotic barrier that prevents interbreed two species due to the fact that they live in different area as insects that lives in golden rod and autumn daisy have different habitat.
Thus, the correct answer is - option A.
The reproductive barrier is defined as the biological isolation between two species that prohibits them to interbreed.
The correct answer is:
Option A. Habitat isolation
Habitat isolation can be defined as:
Habitat isolation is defined as a type of reproductive barrier that prevents the interbreeding between the organisms. Habitat isolation does not mean that the organisms living in different areas are unable to reproduce. The organisms living in the same geographical area but unable to interbreed because one of them lives on goldenrod plants and the other on autumn daisies is referred to as habitat isolation.
Thus, the correct answer is Option A.
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In garden peas, the yellow seed trait is dominant over green seeds. Also, the round seed trait is dominant over the wrinkled-seed trait. These genes are on separate chromosomes. Suppose that two plants that are heterozygous for both traits are crossed and 720 offspring are produced. About how many progeny will be yellow with round seeds
Answer:
405 individuals will be yellow and round seeded.
Explanation:
Available data:
the yellow seed trait is dominant over green seedsround seed trait is dominant over the wrinkled-seed traitThese genes are on separate chromosomesLet´s name the seed color genes Y, and the seed shape gene R
Y is the dominant allele for seed color expressing yellowy is the recessive allele for seed color expressing greenR is the dominant allele for seed shape expressing roundr is the recessive allele for seed shape expressing wrinkledCross: between two plants that are heterozygous for both traits
Parental) Yy Rr x Yy Rr
Gametes) YR yR Yr yr YR yR Yr yr
Punnet Square) YR yR Yr yr
YR YYRR YyRR YYRr YyRr
yR YyRR yyRR YyRr yyRr
Yr YYRr YyRr YYrr Yyrr
yr YyRr yyRr Yyrr yyrr
F1) 720 individuals
9/16 yellow and round seeded individuals, Y-R-
3/16 green and round seeded individuals, yyR-
3/16 yellow and wrinkle seeded individuals, Y-rr
1/16 green and wrinkle seeded individuals, yyrr
Note: the "-" symbol in the phenotypes means that there it could be either a dominant or recessive allele.
If 720 is the total number of individuals in the F1, then:
16 possible genotypes ---------- 100% of the progeny -------- 720 individuals
9 yellow and rounded----------- 56.25% ----------------------------405 individuals
3 green and rounded-------------18.75%------------------------------135 individuals
3 yellow and wrinkled-------------18.75%------------------------------135 individuals
1 green and wrinkled--------------6.25%-------------------------------45 individuals
What happens if the large intestine is NOT working correctly? What happens if the Small Intestine is NOT working properly?
describe the three stages of germination
Answer:
Germination is the process by which the seed embryo begins growth. A seed is considered to have germinated when the embryonic root emerges from the seed coat. ... Three major stages in the germination process are the imbibition of water, increased metabolic activity, and swelling of cells.
Answer:
The three stages in the germination are the imbibition of water, increased metabolic activity, and swelling of cells.
Explanation:
The table below summarizes Mendel’s results for the F2 generation. Mendel’s Results Plant height 787 tall 277 short Flower color 705 purple 224 white Flower position 651 middle of stem 207 end of stem Pod color 428 green 152 yellow Pod shape 882 inflated 299 constricted Seed color 6,022 yellow x green Seed shape 5,474 smooth 1,850 wrinkled What number should replace the letter x in the “Seed color” row? 152 207 224 2,001
Answer:
2001
Explanation:
This question showcases a table that displays Mendel's results (figures) when he crossed pea plants and observed different characters in the plant. Mendel worked with different phenotypic characteristics in the pea plant.
According to the table, the result were for seven characteristics including height, flower color, flower position, pod color, pod shape, seed color, seed shape. Based on the observation of the number of F2 offsprings that possessed dominant trait and recessive trait for each character, we will notice that it follows an approximate phenotypic ratio of 3:1
1. Plant height 787 tall 277 short (3:1)
2. Flower color 705 purple 224 white (3:1)
3. Flower position 651 middle of stem 207 end of stem (3:1)
4. Pod color 428 green 152 yellow (3:1)
5. Pod shape 882 inflated 299 constricted (3:1)
6. Seed color 6,022 yellow X green
7. Seed shape 5,474 smooth 1,850 wrinkled (3:1)
This 3 dominant : 1 recessive ratio is the ratio got in the F2 offsprings when he observed the seven characteristics in pea plants. Hence, the seed color will also follow the same 3:1 ratio
Therefore, 2001 is the result Mendel obtained in the F2 offsprings for the recessive trait of seed color characteristics in his experiment, which actually depicts the 3:1 ratio. Hence, X (green seed color) is 2001
I believe that the answer is C. 2001
Hope i helped :D
Which statement describes Earth?
O It is an outer planet.
O It is a gaseous planet.
O It was formed from gas and dust.
O It has a thick atmosphere of hydrogen and helium.
Answer:
it is a terrestrial planet.
It was formed from gas and dust.
Explanation:
the last one is wrong is not thick and the first one is wrong because it is an innner planet.
Answer: D.
Explanation: It has a thick atmosphere of hydrogen and helium.
A person has a sex-linked inheritable disease. Which statement is true about the set of chromosomes which are likely to carry the genes for this disease?
1-The gene is present on a single pair of chromosomes.
2-The gene is present multiple pairs of chromosomes.
3-The gene is always present on an X chromosome.
4-The gene is always present on a Y chromosome.
The statement is true about the set of chromosomes that are likely to carry the genes for this disease is the gene is present multiple pairs of chromosomes.
What is an example of autosomal?An autosomal recessive disorder needs two copies of the altered gene to compel the disease.
For example the Huntington's disease.
Thus, option "B" is correct, The gene is present multiple pairs of chromosomes.
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Answer:
b
Explanation:
somebody plz answer for this question
Answer:
answer d
Explanation:
Pls help!!
A. birds—>leopard seals—> carnivorous zooplankton—>herbivorous zooplankton
B. phytoplankton—>krill—>fish—>baleen whales
C. phytoplankton—> herbivorous zooplankton —>fish—>leopard seals
Answer: C
Explanation: It is the only one that is accurate according to the graph
Answer:
Hey there!
C. Is correct. phytoplankton—> herbivorous zooplankton —>fish—>leopard seals.
Start from the bottom and trace your way to the top.
Hope this helps :)
Which statement best summarizes the following portion of the Declaration of
Independence?
When in the Course of human events, it becomes
necessary for one people to dissolve the political bands
which have connected them with another, and to assume
among the powers of the earth, the separate and equal
station to which the Laws of Nature and of Nature's God
entitle them, a decent respect to the opinions of mankind
requires that they should declare the causes which impel
them to the separation,
A. Nations should remain separate and equal from one another,
O B. Nature provides certain privileges to some nations,
O C. Sometimes nations must separate from one another,
O D. Nations should make clear why they no longer want to be allied
with one another
Answer: D
Explanation:
If we talk about human rights and separation of nations, the most correct thing todo is to clarify that they are all equal so that for the time being there is no problem between them, in which they stabilize on all fronts.
Which of the following membrane-enclosed organelles contains several oxidases that are involved in oxidation of fatty acids and amino acids during normal metabolism and in detoxification of chemicals like alcohol in the liver?
a) peroxisomes
b) mitochondria
c) proteasome
d) ribosomes
e) lysosomes
Answer: The correct answer is a) Peroxisomes.
Explanation: This kind of membrane enclosed organelles has a mainly function that is the oxidation, this source manages to break fatty acids and during normal metabolism, they also has many enzimes like d-aminoacid oxidases, is another of their functions. Further, the catalase enzime (another enzime which is inside peroxisomes) manages the detoxification of chemicals like alcohol from alcoholic drinks (catalases transform the H2O2, which is toxic, into H2O to detoxificate the liver).
In which series are the stages of interphase in the correct order? A) G1 phase, G2 phase, S phase B) G2 phase, G1 phase, S phase C) G0 phase, S phase, G2 phase D) G1 phase, S phase, G2 phase
Answer:
D) G1, S phase, G2 phase
In what way do two alleles for the same trait differ?
A. They are found on different chromosomes.
O B. They consist of different sequences of DNA.
C. They are complementary.
D. They are produced by two different people.
Answer:
D. They are produced by two different people.
Explanation:
Hope it helps
In the diagram below, which organelle is a ribosome, which combines amino acids and produces proteins?
Answer:
F
Explanation:
It is F because ribosomes can be found on rough endoplasmic reticulum.
Hope it helps.
I am unpredictable as I change myself in a short time span.
Answer:
Weather
Explanation:
Weather is the the state of the atmosphere at a particular place and time as regards heat, cloudiness, dryness, sunshine, wind, rain, etc.
HOPE IT HELPS :)
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Drag each label to the correct location. Identify the cell organelles found only in plant cells and those found in both animal and plant cells. nucleus cell wall chloroplast Golgi apparatus cell membrane ribosome
Answer:
Plant cell: chloroplast, cell wall
animal and plant cells: nucleus, cell membrane, ribosome, golgi apparatus
Explanation:
The organelles that are specific to the plant cell only among the listed organelles include chloroplast and cell wall, while those found in both animal and plant cells include the nucleus, cell membrane, ribosome, and golgi apparatus.
The chloroplast contains the green pigment (the chlorophyll) that is present in all green plants. It is the organelle that confers greenness to plants and is therefore absent in animal cells. The rigid cell wall is only found in plant cells and this confers a kind of hexagonal shape to the cell, unlike the animal cell that lacks a rigid cell wall and therefore, shapeless.
All eukaryotic cells, including plant and animal cells, posses nucleus. It is an organelle that houses the genetic materials of the cell and acts as the control center of the cell. The cell membrane is also common to both cell and acts as a selectively permeable membrane to the cells. The ribosome is the organelle responsible for protein synthesis in both plant and animal cells while the golgi apparatus plays an important role in secretory pathway in both cells.
Answer:
Explanation:
Using evidence from the video, describe three characteristics of life that Archaea bacteria have.
A image of Archaea micro organism within the video confirmed that the body is made of a unmarried cellular, and has a described boundary. Scientists also realize that it reproduces by transmitting its genetic facts because there's proof of Archaea genes in our DNA nowadays.
The three traits of lifestyles that Archaea micro organism have are:not unusual characteristics of Archae bacteria known to this point are: (1) the presence of a feature of tRNAs and ribosomal RNAs; (2) the absence of peptidoglycan mobile partitions, in most instances, in preference to a huge protein-wealthy coat; (three) the formation of ether-related lipids formed through phytanyl chains.
what's the difference among micro organism and archaea micro organism?Like micro organism, archaea have no inner membrane however both have cellular partitions and use flagella for swimming. Archaea differs from the reality that their cell wall does not include peptidoglycan and that the cell membrane makes use of ether-linked lipids rather than an ester connected to lipids in micro organism.
Learn more about Archaea Bacteria at https://brainly.com/question/15993118
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please help me in 2 or 3 minutes A genome is best defined as __________. A. the portion of our DNA that codes for proteins B. all the DNA found in our cells C. a map of a chromosome D. the noncoding portion of our DNA
Answer:
C. a map of a chromosome
Explanation:
In the fields of molecular biology and genetics, a genome is the genetic material of an organism. It consists of DNA. The genome includes both the genes and the noncoding DNA, as well as mitochondrial DNA and chloroplast DNA.
Hope it helps.
Hydroelectric power uses water to generate what?
electricity
gasoline
fossil fuels
Answer:
The answer is option A.
ElectricityHope this helps you
Answer:
A. electricity
Explanation:
Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity
have a great day
how can we improve crop production
Answer:
Improve Soil, Increase Crop Yield to increase crop yield, start from the ground up. Testing soils. Plant Early, Plant Effectively. Practice Seasonal Soil Rotation
Answer: Plant Early,Practice Seasonal Soil Rotation,
Always Scout Your Fields......and soo one
Explanation: hope this helpes :)
Place cells, which are located in the hippocampus, become active in birds when searching for previously-hidden food. Helping them remember where things are, these cells help animals create a:____________
Answer:
Spatial memory
Explanation:
When the need arise to plan and manoeuvre ones way out of a familiar location,or to recollect where particular object is located or an incident happened, the type of memory stored and retrieved from the brain is called Spatial memory.
Generally,animals store information about their environments during their itineraries at different locations,as spatial representation memories of the environments.These are stored in their hippocampus. These are retrieved each time they need to navigate in the environment.
Generally the hippocampus located in the temporal lobes,and medial temporal lobes are the sites where the spatial memory of the environment is stored,and retrieved by the animals(birds)
Generally the hippocampus is the region of the brain which helps to produce ,consolidates,and recollects memories of a specific events in all animals.
response of organism to stimulus of touch is called?
Answer:
mechanoreception
Explanation:
i think it is the answers..
Answer:
Sensitivity
Explanation:
Hope this helps!
The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity. Sensory receptors can receive information from outside the body, as in touch receptors found in the skin or light receptors in the eye, as well as from inside the body.
which of these changes in the food web would cause a decrease in the population of bald eagles
The correct answer is C. A decrease in the population of sea ducks
Explanation:
Food webs are diagrams that represent the relationship of organisms in an ecosystem by showing feeding or predatory relationships. This means food webs show which organisms eats another organism. In the case of the food web presented, this shows bald eagles fed on sea ducks and large piscivorous fish, this implies for survival bald eagles need from these two organisms. In this context, a decrease in the population of sea ducks (option C) would cause a decrease in the population of eagles because fewer sea ducks imply less food for eagles, and therefore fewer resources to survive.
Mendel’s pea plants had either purple or white flowers. This means that the plants A)can self-pollinate. B)have two recessive traits. C)have two alleles for the gene. D)have two copies of a gene from one parent.
Answer: C) Have two alleles for the gene
Explanation:
Mendel’s pea plants had either purple or white flowers. This means that the plants have two alleles for the gene.
What were the two colors of Mendel's pea plants?Pea colour (green or yellow) Pod shape (constricted or inflated) Pod colour (green or yellow) Flower colour (purple or white).
Thus, option "C" is correct.
To learn more about alleles click here:
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Select the correct answer.
What is the benefit of an uneven production of gametes in oogensis?
Answer:
I'm not sure: To have children,
and produce sperm
Explanation:
It is the process of producing female gametes and called the creation of ovum
the benefit of an uneven production of gametes in oogensis is
One haploid cell receives the majority of the nutrients from the cytoplasm
so I conclude option A is correct
hope it helps
Angiosperms are flowering plants. The carpal is a reproductive organ within the flower. What part of the carpal becomes the fruit when fertilization occurs? The image shows a flower with 8 different lines pointing to different parts of the flower. The lines are labeled A through H. Part C Part D Part H Part I
Answer:
Ovary becomes the fruit while ovule becomes seed after fertilization.
Explanation:
There's no image so I can't show whether it's A or H.
Hope it helps.
Answer:
The answer is H
Explanation:
Which water source may become polluted as it travels over land?
Answer:
D. runoff
Explanation:
I took the test.
The predatory bacterium Bdellovibrio bacteriovorus drills into a prey bacterium and, once inside, digests it. When the predatory bacterium attacks the gram-negative bacterium, what are the first structures penetrated by B. bacteriovorus on its way into the prey's cytoplasm
Answer:
The outer membrane, a peptidoglycan layer, periplasm, and cell membrane
Explanation:
The predatory bacterium will have to penetrate the cell wall and the cell membrane of the gram-negative bacterium before getting access to the cytoplasm.
In order to penetrate the cell wall of a gram-negative bacterium, the predatory bacterium will have to penetrate the components of the cell wall which consists of an outer membrane, a thin peptidoglycan layer, and a gel-like matrix known as the periplasm.
Thereafter, the predatory bacterium will have to penetrate the cell membrane before eventually getting access into the cytoplasm of the prey bacterium.
The peptidoglycan layer or the outer membrane will be the first structure penetrated by the B. bacteriovorus.
The attack of the predatory bacterium on the other bacterium:In the given case, the predatory bacterium, that is, B. bacteriovorus needs to penetrate the cell wall and the membrane of the gram-negative bacterium prior of getting within the cytoplasm of the host bacterium.
To penetrate the cell wall of a gram-negative bacterium, the predatory bacterium have to infiltrate the cell wall components comprising,
An outer membranePeriplasm, that is, the gel-like matrixA thin peptidoglycan layerThus, the predatory bacterium will first have to penetrate the peptidoglycan layer of the gram-negative bacterium.
Find out more information about the attack of the predatory bacterium on the other bacterium here:
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Gene expression within the body is controlled by the cells, which determine when a specific gene should or should not be expressed. Influenza (the flu) is caused by a virus that attacks the respiratory system. Which type of gene is likely to be widely expressed in the body of someone who contracts the influenza virus? The gene that controls production of stem cells. The gene that controls production of skin cells. The gene that controls production of red blood cells. The gene that controls production of white blood cells.
The gene that controls production of white blood cells.
Answer:
D) the gene that controls the production of white blood cells.
Explanation:
just did it on edge 2020
what is the function of Krebs Cycle please help!!!!!
Explanation:
it is the final process of oxidisation for food stuff
A sexually reproducing animal has two unlinked genes (on separate chromosomes), one for head shape (H) and one for tail length (T). Its genotype is HhTt. Which of the following genotypes is possible in a gamete from this organism assuming no errors in meiosis?
a) HT
b) Hh
c) HhTt
d) T
e) tt
Answer:
a) HT
Explanation:
This question shows an animal with two distinct unlinked genes i.e. on different chromosomes. One gene codes for head shape and the other for tail length. The gene for head shape possess alleles H and h, while gene for tail length possess alleles T and t.
According to Mendel's law of independent assortment, the alleles of a gene will separate into gametes independently of the alleles of another gene. This occurs in such a way that each gamete will contain only one allele from a gene.
Based on this principle, an animal with genotype HhTt will undergo meiosis and randomly produce gametes with the following allelic combinations: HT, Ht, hT, and ht. As seen in the gametes, only one allele of a gene occured in a gamete at a time.
Therefore, HT is the genotype possible in a gamete of parent: HhTt.