When is the lac operon most active?
A. When glucose levels are high and lactose is present
B. When glucose levels are low and lactose is absent
C. When glucose levels are low and lactose is present
D. When glucose levels are high and lactose is absent
Answer: The correct answer to the question is option WHEN GLUCOSE LEVELS ARE LOW AND LACTOSE IS PRESENT.
Explanation: To start with,Lac operon can be simply defined as a part of the DNA that is under the part of the DNA is manipulated and controlled by the same promoter,they can be found in some prokaryotic cells giving room for regulation over excess synthesis of protein.so simply put,these specific segment of the DNA binds with the segment of the polymerase of RNA so that transcription of the mRNA from the operon genes will be achieved.
Lac operon is also known as lactose operon, it is seen in some enteric bacteria like e.coli where they play a crucial role in coding of genes for those proteins that function in moving lactose into the cystocel and digesting it to form glucose that is used for energy generation. These lac operon are are most active when glucose levels are low and lactose is present,with the low level of glucose, the lac operon can be transcribed to a high level,this is to ascertain that the bacteria only gets to activate the lac operon and can only make use of it,that is using lactose when all the preferred energy source from glucose has been exhausted.
Answer:
c.
Explanation:
Give two examples of pseudo coelomate animals.
Answer:
Roundworm & Taridgrade
Explanation:
bruh
Answer:Nematodes,Rotifers
Question 5
What favorable characteristics does the atmosphere provide that enables life to thrive on Earth?
Answer: The atmosphere Contains oxygen which helps life thrive on Earth, it also helps to stabilize temperature.
Explanation: Animals needs oxygen to survive, the atmosphere contains about 22% of oxygen and also some amount of carbon dioxide which are also essential for plant growth.
The atmosphere serves as an earth-shield against ultraviolet rays, it helps minimize the amount of deadly rays that hit the earth surface. This also helps to stabilize the temperature of the earth to some extent.
All these, provided by the atmosphere helps life thrive on Earth.
Answer:
The atmosphere is held in place by gravity and rises 600 kilometers above Earth into space.
Explanation:
I am sorry if I am rong❌
How is a brain injury classifled ?
Brain injury classified as an injury of the central nervous system.
11. What did Darwin think about on his journey home to England?
12. After he returned to England, what hypothesis did Darwin develop to explain his findings?
3. Photosynthetic organisms such as plants, algae, and some bacteria and archaea can convert solar energy into ___________.
A. Nuclear energy
B. Potential energy
C. Kinetic energy
D. Chemical energy
What is one of the main functions of the large intestines?
break down food chemically
break down food physically
absorb nutrients
absorb water
Answer:
absorb water and mineral salts.
Explanation:
Answer:
D. absorb water
Unit of force is called derived unit
Answer:
Unit of force is called derived unit because the unit of force is derived from two or more than two fundamental units. i.e. kg*m(s*s).
Hope this answer is helpful for you.
Answer:
true
Explanation:
How does exercise affect heart rate of 9th grade student?
we set up an experiment testing different lengths of time of exercise (minutes) on the
heart rate of students
Do people with AIDS make antibodies?
Answer:
Yes, people with aids do produce anti bodies.
Explanation:
People who have HIV produce special antibodies that enable them to suppress the virus.
Is there a relationship between the number of chirps per minute and the temperature? If so, describe the relationship.
Answer:
Habsburg
Explanation:
Ndbenn
Identify and describe the three ways that mutation affect organisms
Answer:
they may cause the development of a disease-causing allele
they may cause the development of a more beneficial allele
they in some cases, may have no noticeable affect
Explanation:
Answer:
Sample Response: Mutations may be beneficial, harmful, or neutral to organisms. If the change caused by a mutation is useful to the organism, then it is beneficial. If the change is damaging to an organism, then it is harmful. If the change is neither useful nor damaging, then the mutation is neutral.
hope this helped
Why does an animal inhale?
A) To get rid of cellular waste like oxygen from the body.
B) So cells can use the oxygen in the air to produce energy.
C) To get rid of cellular waste like carbon dioxide from the body.
D) So cells can use the carbon dioxide in the air to produce energy.
What are the two molecules phages made out of?
Answer:
Like all viruses, phages are simple organisms that consist of a core of genetic material (nucleic acid) surrounded by a protein capsid. The nucleic acid may be either DNA or RNA and may be double-stranded or single-stranded.
Explanation:
What could its hardness be if it can scratch a quartz mineral?
Any mineral with a Mohs hardness of 7 or greater could scratch quartz. Examples would be quartz (7), topaz (Mohs 8), corundum (9), and diamond (10).
hey um hopes this helps please try to answer my newest question please
Answer:
7 Hardness of a quartz mineral
Explanation:
Answer:
Orthoclase feldspar mineral is 6 percent hardness
Quartz mineral is 7 hardness
Topaz mineral is 8 hardness
Corundum mineral is 9 percent hardness
So you are asking for the hardness if it can scratch a quartz mineral. The answer is that Quartz mineral is 7 percent hardness if it can be scratch.
Key words:
1: Mineral
2: Hardness
Hope this helps.
Select all the correct answers.
Which of the following organisms can have all of the energy it uses to move, grow, and survive traced back to radiant energy from the Sun?
a tree
a human
a flower
a bacterium
a fish
Answer: A. ,C.
Explanation: It's in the food chain and constantly need's water.
The correct answers are:
A treeA flowerA bacteriumA fishWhy organisms need sunlight?All of these organisms can have all of the energy they use to move, grow, and survive traced back to radiant energy from the Sun. Trees and flowers undergo photosynthesis to convert sunlight into energy in the form of glucose, which they use to grow and carry out metabolic processes.
Bacteria can also undergo photosynthesis, or they can use organic matter as a source of energy, which ultimately comes from the Sun through the food chain. Fish, as well as other animals, obtain their energy by consuming other organisms that have obtained energy from the Sun through photosynthesis or other means.
Humans are also ultimately dependent on the Sun's energy, but they obtain their energy indirectly through the food they consume, rather than directly from photosynthesis.
Learn more about sunlight, here:
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Can someone please help me with this question
Answer:
Explanation:
Here's a hack. Select everything in that question and click the right side of your track pad with two fingers and click inspect. It'll tell you which row the correct answer is on.
The organ which helps in the digestion of fatty foods is the__ A. Liver B. Stomach C. Pancreas D. Gall bladder
Answer:A
Explanation:
When a flower is in bud it is protected from _____.
help me with those questions please!!
Explanation:
5=noble gases
6= 6 valences( not entirely sure though)
sorry
Answer: Noble gases
There is no answer since it's stable
Due to increase in the number of electrons occupied in the energy level s
V
Explanation:
ILL PAY YOU 20 DOLLARS!!
Some plants grow in trees and steal water and nutrients from the tree. This is an example of (2 points)
parasitism
commensalism
mutation
mutualism
Answer:
Parasitism because this represents a symbiotic relationship in which an organism benefits from the harming or injury of another animal. An extorting personality per say.
Answer:
Parasitism.
Explanation:
Parasitism is when an organism (in this case, a plant) lives in or on something (in this case, in a tree) and harms it in some way to get what it wants.
I say, QUIT HARASSING THAT TREE! Lol, hope this helps!
-Adrien
Why doesn’t urine flow back to the ureters?
Answer:
With vesicoureteral reflux, urine flows backward from the bladder, up the ureter to the kidney. It may happen in one or both ureters. When the "flap valve" doesn't work and lets urine flow backward, bacteria from the bladder can enter the kidney. This may cause a kidney infection that can cause kidney damage.
Question 12 of 25
2 Points
How do plants absorb carbon dioxide?
A. By transpiration
B. By cellular respiration
C. By condensation
D. By photosynthesis
SUBMIT
Answer:
D
Explanation:
Plants absorb carbon dioxide by photosynthesis
Answer:
D
Explanation:
Help me please
61)
Computer simulation is becoming a commonly used process to efficiently model and evaluate the impact of a variety of proposed solutions when facing a complex real-world problem. Reasons for using computer simulation over actual production of possible solutions include all except:
A) costs associated with testing and prototyping too high
B) computers are not as trustworthy as actual prototypes are
C) trial system would not withstand significant testing desired
D) time necessary to acquire and analyze results prohibitively long
Answer:
The correct answer is option B) "computers are not as trustworthy as actual prototypes are"
Explanation:
It is false to affirm that results obtained from computer simulations towards looking for solutions of real-world problems are not as trustworthy as results obtained from actual prototypes. In most cases, computer simulations had proved to be reliable, particularly when the programers use validating arithmetic and algorithms. There are multiple companies dedicated to develop computer simulations to solve real-world problems, which are constantly used and tested in scientific investigations.
computers are not as trustworthy as actual prototypes are
Which of the following is NOT stored in the bone?
Bone Inside
A.
calcium
B.
fat
C.
minerals
D.
water
Answer:
water
Explanation:
Someone help me :)
What are enzymes? (Check all that apply)
Proteins
Antibodies
Hormones
Catalysts
Fats
Chains of amino acids
None of the above
Answer:
biological molecules biochemical reactions
Answer:
Here it is
Explanation:
Predation is responsible for the _________ we see in modern organisms.
evolution
co-evolution
nutrients
adaptations
What is happening within the moon jelly population when the size of the moon jelly population is stable.
Answer:
The jelly is able to hold the weight of gravity
Explanation:
To reproduce, organisms need to release energy from energy storage molecules. If there are more energy storage molecules available to the moon jellies, they can reproduce more, resulting in more births. Fewer deaths would also cause the jelly population to increase.
What are moon jellies made of?The moon jelly is one of the most common jellyfish in Rhode Island. Its body shape resembles an umbrella, with four equal-sized horseshoe-shaped gonads in the center of its body. Moon jellies are made up almost entirely of water and will not hold their shape when out of the water.
To learn more about The moon jelly, refer
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An allele that expresses itself in a heterozygote is a(n)
A. recessive allele
B. allele pair
C. dominant allele
Which venn diagram accurately describes what characteristics of solids, liquids, and gasses could be added to this diagram
Answer:
See explanation for image
Explanation:
The Venn diagram that can accurately show the characteristics of solids, liquids, and gases, can show which characteristics are unique to each of these states of matter and which characteristics are shared among the three.
You did not present the answer options, but it was possible to find them in questions like yours. These answer options are in the figure attached below and among them, the letter B is the correct answer.
Regarding the Venn diagram, we can say that:
The diagram consists of three circles, which overlap, sharing a small space, in the center of the three.Each circle represents a different element.The part of the circle that is away from the shared center refers to the particular characteristics of each element.The part of the circle that is within the shared center refers to the characteristics shared between these elements.In diagram B shown in the figure below, it meets all the requirements shown above.
In this diagram, the shared center presents the common characteristics of solids, liquids, and gases. However, the top circle shows the particular characteristics of solids. The circle on the left shows the particular characteristics of gases, while the circle on the right shows the particular characteristics of liquids.
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