Answer:
D.) repressor DNA-binding site mutation
Explanation:
lacl prevents the repressor polypeptide is a mutant that prevent operon from binding lactose, and thus will bind to the operator and be non-inducible.. This mutant will represses the lac operon whether lactose is present or not and the lac operon will not be expressed. It is also called“super-supperesor".
The lacI locus – One type of mutant allele of lacI (callled I-) prevents the production of a repressor polypeptide or produces a polypeptide that will not allow to bind to the operator sequence.
This is also a constitutive expresser of the lac operon because absence of repressor binding permits transcription.
What is the natural tendency of molecules to spread from an area of high concentration to an area of low concentration?
A.
Active transport
B.
Vesicle
C.
Passive transport
D.
Diffusion
Answer:
This concept is known as diffusion. Diffusion is a passive process, as it requires no energy for it to occur. In a cell, it is used as a method of passive transport since it requires no energy.
Explanation:
A P E X
please help!!!!!!!!!!!!!!! almost due!!!!!!
4. *A simple circuit is created with one pathway, one battery, one light bulb, and one switch. Why does the bulb go out when you open the switch?
a. Because the battery-dies.
b. Because opening the switch opens the circuit.
c. Because too much electricity flows through the bulb:
d. Because there is too much voltage
please explain why you pick the answer
A man has extra digits (six fingers on each hand and six toes on each foot). His wife and their daughter have the normal number of digits (five fingers on each hand and five toes on each foot.) The couple's second child has extra digits. What is the probability that their next (third) child will have extra digits?a. 9/16.
b. 3/4.
c. 1/16.
d. 1/2.
e. 1/8.
Answer:
The correct answer is - option D. 1/2
Explanation:
Extra digits on hands and feet mean an individual has six fingers in each hand and feet, this is known as polydactyly. Polydactyly shows an autosomal dominant type of inheritance pattern.
In this case, the mother is normal so she must be recessive alleles and the first daughter is normal so the father must have a recessive allele which means he is heterozygous.
Cross:
Man = Dd
Woman = dd
Their children :
D d
d Dd dd
d Dd dd
Probability of polydactyl child = 2/4 or 1/2 or 50%
Which of the following is an important step in the formation of a fossil?
The organism must dle of natural causes
The organism must be buried quickly
The organism must not have any fur.
The organism must be a reptile.
Answer: fossils can be formed only when a living thing is buried soon after it dies. If it is not buried soon enough, it decays. For this reason, most fossils are found in sedimentary rocks that were once under water.
Explanation:
How might a plant cell compensate for the excessive membrane fluidity that occurs during prolonged exposures to elevated temperature?A) Reduce membrane cholesterol content.B) Alter the lipid composition to have longer fatty acyl tails and fewer double bonds.C) Alter the lipid composition to have shorter fatty acyl tails and more double bonds.D) Alter the lipid composition to have shorter and more unsaturated fatty acyl tails.E) Reduce cholesterol content and alter the lipid composition to have shorter fatty acyl tails.
Answer:
E) Reduce cholesterol content and alter the lipid composition to have shorter fatty acyl tails.
Explanation:
Reducing the amount of fat makes the tissues or membranes have less plasticity, since these fatty acids with high temperatures increase their fluidity, are less dense and give greater plasticity in their elastic modulus.
Which of the following statements is best demonstrated by the model?
Answer:
i think d is correct
Explanation:
Answer:
i think d is correct ♀️
Relative dating techniques have been around for hundreds of years. How did newer
absolute dating techniques change the way we look at seologic cross section
It allowed us to put reologie cross sections lo better order
It allowed us to put a formation date on some geologic crosections
It allowed us to disprove the existence of land bridges
It allowed us to start using the idea of superposition
Answer:
It allowed us to put a formation date on some geologic crossections
Explanation:
Absolute dating is a newer way of evaluating the chronology of historical events by assigning numerical ages to them. The age thus assigned might not be the exact age but it is still closer to the real age.
It is unlike relative dating techniques which simply give the chronology or order of past events instead of the exact dates. Relative dating techniques have been in use before the emergence of absolute dating techniques in the twentieth century.
What values or parameters can you adjust in this computer model?
Hi, you've asked an incomplete question. However, I provided some information about what a computer model does.
Explanation:
Remember, a computer model in simple terms is a representation of a real-life process or system using a computer. In other words, the computer model is a virtual representation of reality.
For example, weather forecasters often make use of computer models in other to predict changes in weather by taking note of certain values or parameters.
Answer:
You can adjust the type of fluid used, the amount of the fluid, and the amount of water.
Explanation:
PLATO
Which of the following microscope require that specimens be non-living in order to be observed
Answer:
Transmission Electron Microscope
Explanation:
This Transmission Electron Microscope (TEM) is primarily used to view specimens of organisms through a projection image.
It is used to view non-living specimens, even though its not as advanced as its newer counterparts.
PLS HELP ASAP WILL GIVE BRAINLIEST Part A
Think of another common object around your house or school that you could use to model a cell. Describe the object. Based on its characteristics, does the object best model an animal cell, a plant cell, or a bacteria cell? Why?
Part B
Describe two advantages and two limitations of the model you selected.
There is no right or wrong answer
Answer:
Part A. Home phone, animal cell. It is in the same shape and cell pattern.
Part B. Two advantages are it's model and cell pattern, and two limitations are it's difference to the animal cell and it's limit on life.
Answer:
part A: maybe a squishy toy
Explanation:
PLEASE HELP ME WITH THIS QUESTION
Answer:golgi apparatus
Explanation:
What does the term maturity group mean?
O the level of ossification in the bones of the animal
O the median age of the herd the animal was from
Am
O the age and skeletalsification of the animal at slaughter
O the length of time the beef has been stored after slaughter
Why does the cell sometimes have to expend energy to move individual molecules across the cell membrane?
Answer:
Normally, molecules move naturally down a concentration gradient [From an area of high concentration to an area of low concentration] by a process called diffusion. However, sometimes the concentration of the needed substance is higher in the cell than out of it, so the cell uses a different process called Active Transport. Unlike Diffusion, Active transport requires energy, as it is going against a concentration gradient.
Cells expend energy to move cells across the cell membrane as they use Active transport rather than diffusion.
6) This organelle has a rough and smooth version that performs two different functions. The rough version relays proteins and the smooth breaks down waste and transports lipids.
A. cytoskeleton
B. DNA
C. endoplasmic reticulum
D. ribosomes
Answer:
C. endoplasmic reticulum
Explanation:
I don't have any notes on this but research says C! Hope this helps :)
PLEASE HELP ME WITH THIS QUESTION
Answer:
Animal- Eukaryotic
Plant- Eukaryotic
Bacteria- Prokaryotic
Fungi- Prokaryotic
Protist- Prokaryotic
I'm not 100% happy with my answers so don't take my word on it that they will be 100% correct.
But anyway, Hope this is good.
Give 4 examples of types of specialized cells.
Nerve cells, Blood cells, Reproductive cells, Skin cells
Describe limits to cell division.
Answer:
All cells in the body have this internal control and most cells only divide between 50-70 times before they stop or die.
The study of cells is called cell biology.
The cell theory is given by Rudolf Virchow
The postulates of a cell theory are as follows:-
All the organism is made up of cellThe structure and the functional unit of life is the cell.All the pre-existing cell is made up of old cell.The limits of the cell division are cancer cells. The cancer cell does not stop after a limit. It divides continuously and forms a tumor.
Hence, the correct answer is a cancer cell.
For more information, refer to the link:-
https://brainly.com/question/25305623
Cell _________
is the process by
which cells divide
Answer:
Cell cycle
Explanation:
Mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell devides to produce two identical daughter cells.
What is the meaning of life ?
Answer:
The actual meaning of life is to fulfill your purpose in life and accomplish your goals. What I mean by this is, everyone has a purpose, of why they are living. None of us will be here if we all didn't have a purpose
Explanation:
I am a microorganism that helps to increase soil fertility naturally.
Ribosomes
Rhizobium
Leguminous plants
Answer: rhizobium
Explanation: Some bacteria like rhizobium and blue green algae are able to fix nitrogen gas from the atmosphere to enrich the soil with nitrogen compounds and increase its fertility.
Why might there be more dissolved oxygen in a lake in Vermont than in a similar sized lake in Florida in summer? (20 points)
A.) The sandy bottoms of Florida lakes absorb dissolved oxygen better than the rocks in Vermont.
B.) The cooler water in a Vermont lake would be able to hold more dissolved oxygen.
C.) Water evaporates more slowly from Vermont lakes, leaving more dissolved oxygen in them.
D.) More rain falls in Florida in summer, diluting the dissolved oxygen in the lake.
Answer:
B
Explanation:
In summer, the temperature of Vermont is lower than that in Florida. When temperature increases, the ability will decrease. So there is more dissolved oxygen in Vermont's lake.
Answer:
B.) The cooler water in a Vermont lake would be able to hold more dissolved oxygen.
Explanation:
What was the result of using drainage blocks to keep water in the field level during the growing season?
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, it should be noted that the idea of blocking the drainage, which could cause waterlogging (since the water will not be able to leave the field), is a type of irrigation that ensures there is sufficient amount of water for the plants to grow during a growing season. Although, some plants do not grow well in environments like this (in the case of waterlogging) because this environment lowers oxygen level in the root o the plant (caused by the water at the top of the soil).
a balloon expands and shrinks. which type of cell does the balloon best model? a. guard cell, b. bone cell, c. nerve cell, d. epithelial cell
Answer:
Guard Cell
Explanation:
Answer:
The Answer is Guard Cell
the zipper like mountain ranges the run across the flor of the ocean are called ??
Answer:
answer is mid ocean ridges
Answer:
Undersea mountain ranges are mountain ranges that are mostly or entirely underwater, and specifically under the surface of an ocean. If originated from current tectonic forces, they are often referred to as a mid-ocean ridge. In contrast, if formed by past above-water volcanism, they are known as a seamount chain
Sucrase is the enzyme that catalyzes the reaction
Sucrose
Sucrose + Water ----------------------> Glucose + Fructose
If we place 5 moles of Sucrase (enzyme) and 5 moles of Sucrose in a solution of water, how many moles of each substance would we have after 10 minutes?
Answer:
0 moles of sucrose
5 moles of sucrase
5 moles of glucose
5 moles of fructose
Explanation:
Sucrase hydrolyses the glyosidic bond in a sucrose molecule to produce one glucose and one fructose, therefore;
Assuming all the sucrose has been hydrolysed in 10 minutes, you would have:
0 moles of sucrose
5 moles of sucrase
5 moles of glucose
5 moles of fructose
please help me with this question:)
Answer:
animal cell........ hope it's will help u n please mark me as brainliest answer
An individual organism expresses the phenotype for an X-linked recessive
gene. Neither of its parents expresses the trait. What can you infer about the
organism?
A. The organism will also express another linked trait.
B. The organism is male.
C. The organism will pass the gene to its offspring.
D. The organism is female.
Answer: The organism is a male :)
Explanation: just took a quiz on it
Answer:
b
Explanation:
In Indiana Jones, what is a different between Classical Archaeology and Processual Archaeology?
Write 2 sentences please.
Answer:
John S. ... “It was stated above that traditional archaeology is concerned with the reconstruction of ancient cultural systems while the 'new archaeologist' looks for explanations of cultural change that can be used to predict particular changes in particular situations” (Justeson 131).
Human protein X is encoded by human gene X. Gene X consists of 4 exons of 200 bp each, interspersed with introns of 1,000 bp each.
An mRNA cap will be found on ____________.
a. the primary transcript
b. the mRNA
c. at least one of the lariats
d. the poly(A) tail.
e. exon 1
f. all exons
g. some introns
Answer:
a. the primary transcript
Explanation:
The first step in RNAm maturation is the modification of the 5' end of the transcript via the addition of a structure called a cap or 7-methyl guanosine cap. The enzymes responsible for the formation of this cap are recruited to the phosphorylated C-terminal domain after the addition of the first twenty to thirty nucleotides of ARN. The formation of the cap is started by the addition of a GTP molecule oriented inversely to the 5' end nucleotide on RNA. Then methyl groups are added to this G residue and to the ribose forms of one or two nucleotides located on the 5' end. All these reactions take place in the nucleus when the mRNA is found as a primary transcript.
Animal and plant organs are organized into organ systems, thus resembling the way you organize
nimal and plants organs are organized into organ systems,much like you organize your homework in. ... The animals in which cells are organized into structural and functional units ... You organize files by storing