Complete question:
In Drosophila the anterior-posterior axis is established by
a. The distribution of the RNA-binding transcription factor called bicoid and the protein nanos localized in the anterior and posterior poles of the embryo, respectively
b. The distribution of a gene that codes for an RNA-binding protein called nanos localized in the anterior pole of the embryo and a transcription factor called bicoid localized in the posterior pole of the embryo
c. The distribution of a gene that codes for an RNA-binding protein called nanos localized in the posterior pole of the embryo and a transcription factor called bicoid localized in the anteror pole of the embryo
d. The distribution of the RNA-binding transcription factor called bicoid and the protein nanos localized in the posterior and anterior poles of the embryo, respectively
Answer:
c. The distribution of a gene that codes for an RNA-binding protein called nanos localized in the posterior pole of the embryo and a transcription factor called bicoid localized in the anterior pole of the embryo
Explanation:
When the Drosophila zygote develops, it goes through different stages until it gets to the blastula stage. At this point, there are pole cells that determine the axis of the organism -the anteroposterior and the dorsoventral axis-.
A two hours old embryo has already determined its two axes. A ten hours old embryo has already determined its body segments. And from there, each of them develops a structure that turns to be their identity.
Different genes determine the polarity of the egg.
Dorsoventral genes place in the superior and inferior parts of the egg and determine the development of dorsal and ventral tissues.
The same happens with anteroposterior genes.
The BICOID genes place in the anterior part of the egg and activate the hunchback genes that determine the development of the head and the thorax. The Bicoid mRNA distributes in the anterior region of the egg.The NANOS gene reprimes the hunchback genes, which promoted the development of the posterior structures of the body. The Nano mRNA places in the posterior region of the egg, and Nano proteins distribute in this area.The polarity genes of the egg are genes of maternal effects.
While the bicoid and nano genes are expressed in the ovary, the hunchback gene is expressed in the embryo. This last one is activated or inhibited by the foreign ones.
Bicoid and nano genes gradient regulate the expression of the gap, pair-rule, and segment polarity genes.
what is basement membrane? and what is it made up of ? in detail plss help
please help me :( this is due in 5 mins.
A segment of DNA strand has the following bases:
TAC GAT
What is the complementary strand of mRNA?
A: UAG CAU
B: TAG CAT
C: ATG CTA
D: AUG CUA
Answer:
is D: AUG CUA
Explanation:
The zygote is an example of a
cell in humans.
O A. pluripotent
O B. totipotent
O C. placental
O D. multipotent
Answer:
I think it it c
Explanation:
if not I'm sorry
The zygote is basically an example of totipotent cell in humans. The correct option is B.
What is totipotent cell?Cell potency refers to a cell's capacity to distinguish into various types of cells. The greater a cell's potency, the more cell types it can differentiate into.
A totipotent cell is a single cell that, when given the proper motherly assistance, can give rise to a new organism.
A totipotent cell is one that can generate all extraembryonic tissues, as well as all body tissues and the germline.
The term "totipotent" refers to a cell that has the ability to split and produce all differentiated body cells, both embryonic and extraembryonic.
Zygotes and spores are instances of totipotent cells in animals.
Thus, the correct option is B.
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PLS SOMEONE HELP I HAVE AN HOUR ITS DUE!
Answer:
100%
Explanation:
Use a Punnett square to facilitate calculating the possibility.
y y
Y Yy Yy
Y Yy Yy
Y is the white teeth trait, which is dominant. So, there is a 100% chance, though heterozygous.
Microbiology refers to the study of
A. Microorganisms including bacteria, viruses and parasites
B. All multi-cellular organisms
C. All eukaryotic organisms
d. Microorganisms including all plants, animals and fungi
6. Define allele, please help me out
Answer:
allele is the pair of gene controlling the pair of contrasting characteristics
Answer:
each of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
hope this answer helps you!
In the Diffusion Through a Membrane lab, the model cell membranes
allowed certain substances to pass through based on which characteristic
of the diffusing substance?
O (1) size
O (2) shape
O (3) color
O (4) temperature
Answer:
4
Explanation:
Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Lower temperatures decrease the energy of the molecules, thus decreasing the rate of diffusion
Stem cells undergo a process known as differentiation in order to become specialized. Specialized cells do not revert back into their undifferentiated form once they have matured. Nucleic acids play a role in the process of differentiation. Which statements describe the relationship between nucleic acids and differentiation? Select ALL that apply.
A) Genes within the genome tend to remain inactivated until their gene products are needed.
B) Once they are differentiated, cells contain additional DNA that programs the cells to be specialized.
C) All cells in an organism, whether differentiated of not, contain a complete genome with the exact same genes. Hindi
D) Stem cells remove part of their genome once they are differentiated so that unnecessary genes cannot be expressed.
E) Transcription factors are present in certain cells that cause specific genes to be transcribed in differentiated cells.
A
C
E
(Trust me)
Explanation:
The differentiated cell has specific transcription factors that are present in the cell and cause specific genes to be transcribed. Option E is the correct answer.
What is cell specification?Cell specification is the process by which a cell determines its fate. After specification, a cell's gene pattern changes. Some genes that are present in euchromatin regions are expressed, and as a result, this cell expresses specific proteins and RNA.
After the zygote is formed, it undergoes a cleavage process to form multiple cells by mitosis. The cells then specify and receive their fate, such as some converting into nervous cells, others into epithelial cells, and still others into blood cells.
This change in structure and function is due to the expression of special genes in DNA. Though all cells have the same genetic content, some genes are present in euchromatin regions and some genes are present in heterochromatin regions. Genes of euchromatin are expressed.
Hence, option E is the correct answer, as the cell produced specific transcription factors.
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The maternal effect Drosophila mutation bicoid (bcd
-
) is recessive. A
female that is bcd
-
/bcd
+
is mated to a bcd
-
/bcd
- male. What is the outcome?
A) 50% of the eggs will hatch, and these will produce fertile adults
B) no eggs will hatch
C) all eggs hatch, but 50% of the resulting daughters produce eggs
that fail to hatch
D) it is impossible to get a bcd
-
/bcd
- male, so this mating can not
occur
E) 50% of eggs will hatch, but half the female offspring will be infertile
Answer:
I need the points :((((((
List 3 words to describe
speciation that occurs through
gradualism
Answer:
Separation, Adaptation, Reproductive Isolation
Explanation:
Which of the following is a difference between arteries and viens?
arteries carry blood and veins carry only plasma
arteries do not have valves and veins do have valves
arteries are thin and veins are thick
arteries carry blood back to the heart and veins carry blood to the heart
Help I will give extra points to anyone who helps question is In the photo
Answer:
C. 3
Explanation:
Looking at the graph, it goes fastest in the shortest time in sector 3.
Please select the word from the list that best fits the definition
The movement of a substance through the cell membrane that requires energy.
Answer:
The correct answer is - active transport.
Explanation:
Active transport is the movement of a substance that crosses the cell membrane against the concentration gradient and therefore requires energy in the form of ATP. In contrast, passive transport does not require energy for the movement of a substance through the cell membrane as it moves to the concentration gradient.
This movement of molecules is towards the region of high concentration from the region of lower concentration through the cell membrane by elcectrochemical gradient or ATP.
help..................................................
Option F. It is moist and cool with decaying debris.
Answer:
F. It is moist and cool with decaying debris.
Explanation:
I know this because an earth room always needs their supplement from the dirt in order to stay moist and wet during any weather.
list the 3 main types of rocks and the process of how they are craeted
The overall efficiency of oxidative phosphorylation, assuming standard conditions, can be calculated by comparing the free energy potentially available from the oxidation of NADH by O2 to the free energy required to synthesize 2.5 ATP from 2.5 ADP. This comparison reveals an efficiency of 35%, which is based on the experimental measurement of 2.5 ATP for every NADH oxidized during oxidative phosphorylation. Using this efficiency, calculate the number of ATP generated by each of the following Complexes:
Answer:
The number of ATPs produced wheh efficiency is 100% is 71.42 ATP.
Explanation:
It is known that at the end of Kreb's cycle 10 NADH are produced
Now by using the unitary method
1 NADH produces=2.5 ATP
10 NADH produces=2.5 ATP x 10
10 NADH produces=25 ATP
This is for the efficiency of 35%.
35% efficiency produces ATPS=25
1% efficiency produced ATP=[tex]\dfrac{25}{35}[/tex]
100% efficiency produced ATP=[tex]\dfrac{25}{35}\times 100[/tex]
100% efficiency produced ATP=71.42 ATP
The number of ATPs produced wheh efficiency is 100% is 71.42 ATP.
Question 9
O Mark this question
Being left-handed (represented as I) is a recessive trait. Jim and Suzie are both left-handed.
If they have a child, which of the following could be his/her genotype?
O LL
O Either Ll or II
OLI
II
SAVE AND CONTINUE
The correct option is (2) either LI or II .
The term genotype refers to the genetic component of a trait.
The phenotype is the genotype's visible manifestation.Due to the fact that an existing DNA strand is used to make a new strand, DNA replication is known as semiconservative.What does the term genotype mean?The type of variant present at a specific locus (i.e., region) in the genome is scored by what is known as a genotype. Symbols can be used to symbolize it.There are three different genotype types: hetrozygous, homozygous recessive, and homozygous dominant.Learn more about genotype brainly.com/question/20730322#SPJ2
What happens at the dew point?
A. Water evaporates.
B. It rains.
C. Clouds are formed.
D. All of the above.
Answer:
Water droplets are formed.
Explanation:
The genetic code was elucidated through the use of polyribonucleotide's synthesized either enzymatically or chemically in the laboratory. Given what we now know about the genetic code, how would you make a polyribonucleotide that could serve as an mRNA coding predominantly for may Phe residues and a small number of Leu and Ser residues?
What other amino acid(s) would be encoded by this polyribonucleotide, but in smaller amounts?
Answer:
The genetic codes are responsible for coding the amino acids. The messenger RNA (ribonucleic acid) consists of triplet codons, which is responsible for the synthesis of respective amino acid sequences. The UUU codes for the phenylalanine amino acids. Similarly, the incorporation of 5 mixtures such as ADP, GDP, CDP, and UDP can alternatively produce the mRNA polymer with the serine and lysine residue in a small amount.
EXPLANATION:
The genetic codes are responsible for coding the amino acids. The messenger RNA (ribonucleic acid) consists of triplet codons, which is responsible for the synthesis of respective amino acid sequences. The formation of the RNA stand is done by using ADP, GDP, CDP, and UDP (adenosine, guanosine, cytosine, and uridine diphosphate). It requires no template for the formation of polymers. Therefore incorporation of UDP is done by the incorporation of polynucleotide phosphorylase, which will result in the formation of poly U. The UUU codes for the phenylalanine amino acids. Similarly, the incorporation of 5 mixtures such as ADP, GDP, CDP, and UDP can alternatively produce the mRNA polymer with the ser and lysine residue in a small amount. For example in the stretch of polynucleotide UUU presence of one of the following codon UUA, UUG, CUU, CUC, CUA, CUG as well as UCU, UCC, UCA, UCG, and AGU can synthesize leucine and serine residues. (UUC)n can synthesize the polymer of phenylalanine, serine, and incorporation of few A and G will synthesize leucine. However, the presence of A, C, and G can also synthesize a small amount of tyrosine, isoleucine, and cysteine residue.
A wasp is a flying insect. In wasps, wing length is coded for by a single gene. Two scientists studying wasps hypothesize that short wings are recessive to long wings. Which of the following observations best supports this hypothesis?
A. Wasps with long wings are less likely to survive.
B. Wasps with long wings can produce offspring with short wings.
C.Wasps have wing lengths ranging from very long to very short.
D.Wasps with short wings prefer to mate with wasps with long wings.
Answer:
answer c is your answer final answer
Answer:
Your Answer Is C
Explanation:
Wasps have wing lengths ranging from very long to very short.
Hope I Helped!?
DNA - TAC CAT GGA ATT ACT
RNA - ?
Amino Acids - ?
PLZ HELP
Answer:
DNA: TAC CAT GGA ATT ACT
RNA: AUG GUA CCU UAA UGA
Amino acids: met- val-leu-stop-stop
Explanation:
DNA: T =A to RNA
DNA: A = U to RNA.
Use the genetic code to find the amino acids.
starting from left-up-right, by three codons. use the image below.
6. Compare the DNA of an offspring to the DNA of its parents.
Answer: In DNA the parent duplicates itself through a process known as mitosis. Any offspring is going to have the same exact DNA as the parent. (same characteristics, everything).
The comparison of the DNA of an offspring to the DNA of its parents is determined by the fact that every offspring gets 50% of its genome from each parent, but it is always a different 50%.
How does the DNA of parents compare to that of offspring?In the process of sexual reproduction, meiosis produces haploid gametes that fuse during fertilization to produce a diploid zygote. In other words, an offspring inherits half of the genetic material from each parent. The children resemble their parents, but they are not identical to them.
During the process of meiosis, gametes get a random chromosome from each pair. This means that there are over 8 million possible DNA combinations from 23 chromosome sets. Due to this, the difference in the genetic material or DNA sequences is occurred due to the process of variations between them while DNA copying.
Therefore, the comparison is made due to the mechanism through which every offspring gets 50% of its genome from each parent, but it is always a different 50%.
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characteristics of plasmodium
Explanation:
Characteristics of Plasmodium
They characteristically show the presence of apical complex.
Apical complex consists of polar rings, rhoptries, micronemes, mitcochondrions, microtubules and microspores
Organs for locomotion
They show slight amoeboid change of form
The parasite in their life cycle shows an alternation of generation accompanied by an alternation of host
A scientist gathers data on the growth of a population over time. A graph of the data is shown below.
Which statement below best describes the graph at point X?
A. The population is declining
B. The population is increasing
C. The population has reached the carrying capacity of the ecosystem
D. The population has exceeded the carrying capacity of the ecosystem
What is the pH indicator in TSI agar?
Answer:
I believe the ans is phenol red.
Which of these do not contain muscles? uterus blood vessels calf muscles eye pupils
Answer: blood vessels
Explanation:
Answer: Blood Vessels
Explanation:
3) Write 3 sentences that explain how limiting factors can change the carrying capacity of
an ecosystem?
Answer:
Limiting factors determine carrying capacity. The availability of abiotic factors and biotic factors dictates how many organisms can live in an ecosystem. Carrying capacity is also impacted by the availability of decomposers. ... Humans can also alter carrying capacity.
Please select the word from the list that best fits the definition
Grouping items together to keep observations organized
inferring
predicting
classifying
observing
The answer is classifying.
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Definition: Arranging (a group of people or things) in classes or categories according to shared qualities or characteristics.
the image depicts the anatomical structure of the forelimb of a dolphin and a bat, both mammals. Which hypotheses are consistent with the evolutionary relationship shown by this image? select ALL that apply.
a) bats are more closely related to birds than to dolphins do the similarity in flight
b) dolphins and bats share a common ancestor that is more recent than the one shared with birds
c) amino acid sequences for the cytochrome C analysis of these two species will also be similar
d) the dolphin in the back diverge under different selective pressures, which accounts for their differences
e) embryological comparisons of these two species will show homologies of each other than bats have with birds
Answer:
D. the dolphin in the back diverge under different selective pressures, which accounts for their difference
Explanation:
I hope this is helps you
Dolphins and bats share a common ancestor that is more recent than the one shared with birds.
Homologous bodiesHomologous organs are those that may or may not perform the same function, but have the same basic structure and the same embryonic development. This means, therefore, that individuals who have these organs have shared ancestry.
Whit this information, we can conclude that dolphins and bats share a common ancestor that is more recent than the one shared with birds.
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Principales of Biotechnology
What are the units you guys have? I want to study them
Some units includes Tools and Processes of Recombinant Technology which consists of many topics of DNA, ligase, PCR.
If you are interested in learning about the Principles of Biotech, you could get a headstart on khan academy. It'll help you prepare.
