Two primary agents of cellular communication are hormones and chemicals produced by nerve cells.
What are the principles of cellular communications?
Cellular communication is a stepwise process that affects the generation of an extrinsic signal, detection of the signal by a receptor, transduction of the signal by intracellular signalling molecules and cellular response. When the extrinsic signal is removed, cellular communication processes cease.
Thus, hormones and chemicals are two primary agents of cellular communication.
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How does the gain or loss of thermal energy cause molecules to evaporate?
Answer:
When a liquid is heated, the molecules gain energy. This means they move and vibrate more, causing them to escape in the atmosphere.
Explanation:
Where were the earth's landmasses located? How did they differ from today?
What would the Punnett square of a female hybrid and a male whith colorblindnes look like?
Answer:
I think it's correct but i'm not sure
Explanation:
+ is normal vision and dominant
c is colourblind and recessive
Explain the difference between sexual reproduction and asexual reproduction. Explain either an advantage or disadvantage for
each.
In asexual reproduction, reproductive organs aren't used but they're used.
advantage of sexual- A lot of genetic variation. since they have DNA of two parents. they can survive more and adapt more.
disadvantage of asexual- diversity is limited. Since the organism only gets the DNA of one parent, they wouldn't be able to really survive if something happened.They would easily be extinct.
Sorry I can't really cone up with better words but I hope you get the idea. it all comes down to natural selection really if you've learned about it. Hope it helped!!!
What does a Punnett square show?
a: all the possible offspring outcomes of a genetic cross
b: only the dominant alleles in a genetic cross
c: only the recessive alleles in a genetic cross
Answer:
a
Explanation:
the probability of an offspring with a given genotype resulting from a cross.
You have discovered the fossil remains of three organisms. One is
mammalian, one is reptilian, and the third has both mammalian and
reptilian characteristics. What techniques could you apply to
determine possible relationships among these organisms?
Answer:
Explanation:
These "missing links" demonstrate the evolution of traits within groups as well as the ... You have discovered the 5. fossil remains of three organisms. One is mammalian, one is reptilian, and the third has both mammalian and reptilian features. What techniques could you apply to determine possible relation- ships a
The methods which are used for determination of the possible relationships among the given organisms is by comparative anatomy, DNA sequence analysis and protein comparison.
What is comparative anatomy?The study of the body structures of different species of animals to understand the adaptive changes in them during evolution from common ancestors is referred to as comparative anatomy.
The methods which are used for determination of the possible relationships among the given organisms is by comparative anatomy, DNA sequence analysis and protein comparison.
Thus, using these techniques one can determine possible relationships among these organisms.
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what cause ocean acidification.
Answer: Ocean acidification is primarily caused by the uptake of carbon dioxide from the atmosphere .
Explanation:
Explain why males can be carriers for an autosomal disorders but not for an x-lined disorder.
Answer:
In order to be a carrier, the male must be a carrier of the allele without expressing it phenotypically. This can only happen when the inheritance is autosomal because he has a pair of autosomic chromosomes meanwhile he only has one X chromosome. So when the inheritance is X-linked, the allele of the X chromosome will always be phenotypically expressed
list 3 ways soils are classified
Answer:
Soils are composed of mixtures of mineral and organic materials, but are classified according to the size of their mineral particles. The three main texture groups are sandy, silty, and clay.
Sandy soil contains particles that can be seen with the naked eye and feels gritty when rubbed between the thumb and forefinger. Sandy soils will generally not stick together when wet.
Silty soil contains particles, which are smaller than sand particles but larger than clay particles. Silt feels powdery when rubbed between the thumb and forefinger. Silty soil sticks together when wet, but will not hold its shape after it is dry.
Clay soil contains the smallest particle size. Clay particles form a sticky soil when wet and will generally hold a shape after drying. Soils are rarely composed of just sand, silt, or clay. They are usually a mixture of the three with a larger percentage of one size of particles.
Answer:
Depending upon the average grain-size and the conditions under which soils are formed and deposited in their natural state, they may be categorized into following types on the basis of their structure: In the grain-size classification, soils are designated according to the grain-size or particle-size. The more common classification systems are enlisted below: Geological Classification
Classification by Structure
Classification based on Grain-size
Unified Soil Classification System
Preliminary Classification by soil types
Based on the agencies responsible for their present state, soils may be classified under following types: Residual Soils
Transported Soils:
Alluvial or sedimentary soils
Aeolian soils
Glacial soils
Lacustrine soils
Marine soils.
Then you have inorganic and organic soils.
Explanation:
What do these questions mean ? WILL GIVE BRAINLIEST :) pls give an example etc
Answer:
long story short, its asking how their relationships made them lost, so what they are asking is what made them lost as their characteristics.
Explanation:
so yeah
During fertilization gametes join to form a diploid cell known as a ________
Answer:
zygotes
Explanation:
Human fertilization and development
Fertilization is the process in which haploid gametes fuse to form a diploid cell called a zygote. To ensure that each zygote has the correct number of chromosomes, only one sperm can fuse with one egg.
What can be used to illustrate evolutionary classification, or cladistic analysis
NEED HELP
How do we use ATP in our body?
Explanation:
ATP is consumed for energy in processes including ion transport, muscle contraction, nerve impulse propagation, substrate phosphorylation, and chemical synthesis.
What is the main advantage of using dams to produce
electrical energy?
Answer:
Water is a never ending source as well as it dosent produce the carbon footprint in which many energy companies and plants produce.
Explanation:
PLEASE HELP ME FILL IN THE BLANKS ASAP!!!!!!!!!!!!!! GIVING AWAY 18 POINTS!!
1. D. Marine
2. A. Desert
3. E. Freshwater
4. C. Grassland
5. B. Tundra
If there is a #6, then the answer would be F. Tropical rainforest
In one to three sentences, describe what happens
during the reduction stage of the Calvin cycle.
Answer:
In the light-independent reaction, products of the light reaction are used to make sugars. Here, in the Calvin cycle, the enzyme, RuBisCO, catalyzes the fixation of CO2 with Ribulose 1,5-bisphosphate (RuBP). Organic molecules are reduced and RuBP is regenerated
Explanation:
Answer:
ATP and NADPH transfer chemical energy to 3-PGA.
Glyceraldehyde 3-phosphate (G3P) is created.
G3P is used to make sugar.
Explanation:
The presence of fecal coliform bacteria in a sample of river water suggests which of the following?
The pH of the river is very high.
The water is contaminated with animal waste.
The river is devoid of plant life.
The dissolved oxygen level of the river is high.
Fish caught from the river will be free of parasites.
Answer:
Water is contaminated with animal waste
Explanation:
The presence of fecal coliform bacteria in a sample of river water suggests that the water is contaminated with animal waste. Thus, the correct option for this question is B.
What is the significance of fecal coliform?The presence of fecal coliform in any sort of river or drinking water often indicates fecal contamination. This means that there is a greater risk that pathogens are present than if only total coliform bacteria are detected. E. coli is a sub-group of the fecal coliform group.
If coliform bacteria are present in your drinking water, your risk of contracting a water-borne illness is increased. This is because these bacteria are the most potent source of waterborne illness. Although total coliforms can come from sources other than fecal matter, a positive total coliform sample should be considered an indication of pollution in your well.
Therefore, the presence of fecal coliform bacteria in a sample of river water suggests that the water is contaminated with animal waste. Thus, the correct option for this question is B.
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2 C2H6 + 702 — 4 CO2 + 6H2O
How many moles of O2 are required to
react with 1 mole of Ethane?
We calculate the number of moles of water given its mass by dividing the mass by the molar mass.
n water = (36.04 g) / (18 g/mol)
n water = 2 mols
From the given balanced equation, every 6 moles of water produced will require 7 moles of oxygen.
n oxygen = (2 mols H2O) x (7 moles O2 / 6 moles H2O)
n oxygen = 2.33 mols O2
PLEASE HELP ASAP
If an individual has trisomy 21, what is true of the individual's chromosomes?
There are 21 chromosomes in each body cell.
There is a deletion of chromosome 21.
There are 47 chromosomes in each body cell.
There are 47 chromosomes in half the body cells.
Answer: There are 47 chromosomes in each body cell.
Explanation:
Answer:
there are 47 chromosomes in each body cell
Explanation:
Moles and freckles are similar in that they are both:
skin abnormalities
growths
caused by an even distribution of melanin
caused by an uneven distribution of melanin
Answer:
I believe that the answer would be skin abnormalities.
Explanation:
Growths do not apply.
Melanin applies mainly to freckles.
PLEASE solve number 1 and 2 because i don’t get it , don’t mind my answers
Answer:
1) RNA strand = UCA GCA AAU
2) Amino acids: Asparagine Arginine Stop
(ASN) (ARG) (STOP)
Explanation:
Some theory that you need to know to answer the question:
Each tRNA has two important sites. One of them that couples with the codon of the mRNA molecule, named anticodon. The other site couples with an amino acid through the action of the aminoacyl-tRNA synthase enzyme. The whole complex, amino acid + enzyme + tRNA is named aminoacyl-tRNA. Considering that there are twenty amino acids available, there are also twenty complexes of aminoacyl-tRNA, one for each amino acid.
tRNA allows amino acids to align according to the nucleotidic sequence in the mRNA molecule.
Once the new amino acid joins the growing peptidic chain, the binding between the amino acid and the tRNA molecule breaks. The tRNA is now free to join another amino acid and repeat the cycle.
Now, to fill in the boxes, you need to pay attention to two things:
• Anticodon: In this box, you need to place the sequence of bases that pairs with the mRNA codon.
• Amino Acid: In this box, you need to place the amino acid that is codified by the mRNA codon.
For instance, let us say that the codon of mRNA is CUC. The anticodon for this sequence is GAG (because guanine joins cytosine and adenine joins uracyl).
The amino acid places on the 3´extreme of the tRNA molecule will be the one that is codified by the codon, NOT the anticodon. So, as the codon is CUC, the amino acid will be Leucine, Leu. Do not use the anticodon GAG to fill these boxes. Remember that tRNA is translating information carried by the mRNA, so we need to use this information to grow the protein.
1)
Strand of DNI → AGT CGT TTA
Each of these letters are bases → Adenine, A - Guanine, G - Thymine, T - Cytocine, CEach of these three-lettered groups are codons.So, we need to pair these bases, knowing that:
Adenine (A) and guanine (G) derive from purines, while Thymine (T) Uracile (U), and Cytosine (C) derive from Pyrimidines.
In the DNA molecule, Adenine (Purine) always pairs with Timine (Pyrimidine), while Guanine (Purin) forms pairs with Cytosine.
In the RNA molecule, Adenine is paired with Uracil, U. So, whenever there is an Adenine in the DNI strand, it pairs with Uracil of RNA strand. If there is a Thymine in the DNI strand, it pairs Adenine of the RNA strand. And, as always, Guanine pairs with Cytosine.
A ⇒ UT ⇒ AG ⇔ CKnowing how to pair bases, we can fill the RNA molecule boxes.
Strand of DNI → AGT CGT TTAStrand of RNA → UCA GCA AAUA ⇒ U C ⇒ G T ⇒ A
G ⇒ C G ⇒ C T ⇒ A
T ⇒ A T ⇒ A A ⇒ U
2)
Now we need to translate these new codons of mRNA to amino acids.
To fill the boxes you should have a genetic code chart to see the codons that codify for each amino acid.
Codon: AAU CGA UAG
Amino acids: Asparagine Arginine Stop
(ASN) (ARG) (STOP)
The new protein is synthesized from the amino terminus to the carboxy terminus of the mRNA molecule. The added amino acids to the chain are coded by a codon formed by three bases in the mRNA. mARNs also have a start and end codon that are the signals of the synthesis initiation and finish. When the ribosome reaches a stop codon, protein synthesis is over.
Asexual reproduction is the when only one parent contributes genetic information creating an identical offspring. true Or false?
Answer:
That is a true statement
ASAP PLS! I WILL GIVE BRAINLESEST
Why does a vasectomy not affect urine flow?
(FETAL PIG LAB)
Answer:
A vasectomy has no effect on libido, erections, or urination. The amount of semen a man ejaculates will not change after a vasectomy; the only difference is that there are no sperm in the ejaculate. The testicles will also continue to produce testosterone at the same rate.
Explanation:
Vasectomy is the surgical method of male sterilization or permanent contraception. During this process, the male vasa deferentia are cut and sealed to prevent sperm from the urethra and thereby prevent fertilization.
Vasectomy is done in the case of males. Many males are concerned about urination and erection. It is the different duct where urine uses the ureter and sperm uses the gas deferens.
Vasectomy is a method of contraception that has no effect on libido, urination, and erection. Hence the vasectomy does not affect urine flow.
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Your mom and dad each gave you 23. They make you, you and me, me. – What is it?
Answer:
92
Explanation:
23 * 4 = 92
hope this helped
Sam, who has type A blood wants to donate blood to his sister Mia, who has type O blood. Can he donate his blood to her? Why or why not?
I need help please
Watson and Crick made a successful model of DNA based on Rosalind Franklin's X-ray studies. This indicated that DNA was
A.
a triple helix with intertwined bases.
B.
a double helix with bases outside the helix.
C.
a double helix with bases inside the helix.
D.
a single linear molecule of bases held together by sugar-phosphate bonds.
Answer:C. a double helix with bases inside the helix
ExpAnswer: I got it correct
An analysis of DNA and RNA sequences can be used to classify organisms. A dendrogram, such as the one shown below, is based on molecular data. It can be used to represent evolutionary relationships within a group of organisms that are hypothesized to have descended from a common ancestor. Brown bear Sun bear Spectacled bear Giant panda Lesser panda Raccoon Dog 100 0 So 60 40 20 Mulions of Years Ago 13 Which statement is best supported by the information in this dendrogram?
Answer: C
Explanation: Lesser pandas are more genetically similar to raccoons that they are to giant pandas.
The statement "Lesser pandas are more genetically similar to raccoons than they are to giant pandas" is not fully supported by the information in the dendrogram presented above.
What does the dendrogram suggest basically ?While it is true that the dendrogram suggests that the giant panda and lesser panda share a more recent common ancestor than either does with the other bears or the raccoon dog, it does not provide evidence to support the claim that the lesser panda is more genetically similar to raccoons than to giant pandas.
The dendrogram provides evidence for the evolutionary relationships among these organisms based on their DNA and RNA sequences. It suggests that these organisms have a common evolutionary history and can be grouped together based on their molecular data.
However, it does not provide information on the degree of genetic similarity between any two specific organisms or groups of organisms.
Therefore, while it is possible that the lesser panda may be more genetically similar to raccoons than to giant pandas, this claim cannot be fully supported by the information in the dendrogram alone.
Further analysis of genetic data and comparison of specific genetic sequences would be necessary to determine the degree of genetic similarity between these organisms.
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The diagrams below represent a human organ system
The major function of the system is to?
(1) provide immunity essential for the survival of each individual in a population (2) provide cells that are necessary for the survival of the species
(3) produce chemical messages that are necessary for nerve cell development (4) control the passage of nutrients into and out of a developing fetus
Answer: (2) provide cells that are necessary for the survival of the species
Explanation:
Which countries would be impacted if the world transitioned away from coal?
Answer:
…
Explanation:
Where should people focus their efforts when improving transportation energy efficiency?
A)
automobile design
B)
bus design
C C)
train design
D)
airplane design
