Answer:
Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur. External regulators speed up or slow down the cell cycle.
Explanation:
I hope this helps :)
The two types of proteins that regulate the cell cycle are Cyclins and Cyclin-dependent Kinases (CDKs). These two groups of proteins are responsible for the progress of the cell through various checkpoints.
What are Proteins?
Proteins are made up of hundreds or thousands of smaller units called Amino acids. They are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body’s tissues and organs.
Cyclins regulate the cell cycle only when they are bound to Cdks and become fully active. The Cdk/cyclin complex must be phosphorylated, which further initiates other proteins to be phosphorylated that advances the cell cycle.
Retinoblastoma (Rb), is another group of tumor-suppressor proteins that regulates the cell cycle by monitoring the cell size.
Therefore, there are two types of proteins that regulate the process of the cell cycle are Cyclins and Cyclin-dependent Kinases (CDKs).
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Write a set of directions for a red blood cell to deliver oxygen to the brain. Lungs heart-brain aorta arteries veins
Answer: How does oxygen get into the bloodstream? Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.OK Our typical red cell passes from the capillary into the venules, and then into veins. It flows back to the right side of the heart, completing the second loop of its circuit [music out]. As we saw, it then travels back to the lungs.The heart, blood and blood vessels work together to service the cells of the body. Using the network of arteries, veins and capillaries, blood carries carbon dioxide to the lungs (for exhalation) and picks up oxygen. From the small intestine, the blood gathers food nutrients and delivers them to every cell.
hope this helps have a awesome night/dayExplanation:
What is the limiting factor for photosynthesis at night ?
Answer:
Factors that affect photosynthesis:
Light Energy/ intensity
Temperature
Carbon dioxide concentration
Therefore I believe the answer to be Light energy as we're talking about night here.
When the environment favors extreme types in a population at the expense of
intermediate forms, this is an example of which category of natural selection?
Answer:
Disruptive or Diversifying selection
Explanation:
occurs when natural selection favors both extremes of continuous variation. Over time, the two extreme variations will become more common and the intermediate states will be less common or lost.
Which gene mutation would have the greatest impact on a protein's amino acid sequence?
Answer:
heyyy there fellow weeb, thought id help u with this.
Explanation:
The addition of 2 bases is the most severe of these mutations. Because of a triplet reading of the genetic code, a 2 base insect changes the code readings frame that causes a frameshift mutation that means that each amino acid is incorrect after the mutation's site.
What is the Law of Universal Gravitation and how did it differ from the understanding of the motion before Newton theorized it?
How do you think Newton’s discoveries help to pave the way for his Three Laws of
Motion?
Answer:
While Copernicus rightly observed that the planets revolve around the Sun, it was Kepler who correctly defined their orbits. At the age of 27, Kepler became the assistant of a wealthy astronomer, Tycho Brahe, who asked him to define the orbit of Mars. Brahe had collected a lifetime of astronomical observations, which, on his death, passed into Kepler’s hands. (Brahe, who had his own Earth-centered model of the Universe, withheld the bulk of his observations from Kepler at least in part because he did not want Kepler to use them to prove Copernican theory correct.) Using these observations, Kepler found that the orbits of the planets followed three laws.
Select all that apply. Head lice are tiny organisms that can be found on
the eyebrows.
the eyelashes.
the top of the head.
the lips.
the ears.
Answer:
1,2,3
Explanation:
Edg 2021
What characteristic makes marine mammals different from other marine animals?
They all give birth on land.
They live only in the ocean and cannot leave the water.
They are carnivores that eat mainly fish.
They breathe air through lungs.
Answer:
d
Explanation:
bc its d
The characteristic that makes marine mammals different from other marine animals is that they breathe air through their lungs. Thus, the correct option for this question is D.
What are the characteristics of marine mammals?The characteristics of marine mammals may significantly include they breathe air through the lungs, being warm-blooded, having hair (at some point during life), and producing milk to nurse their young — while also living most or all of their lives in or very near the ocean.
Marine mammals have the same characteristics as all other mammals, but they have adapted to living all or part of their life in the ocean. Many have streamlined bodies to help them swim faster. With similar to the Fishes and other animals that have gills so they can breathe underwater. Marine mammals do not have gills. They have to come to the surface to breathe.
Therefore, the characteristic that makes marine mammals different from other marine animals is that they breathe air through their lungs. Thus, the correct option for this question is D.
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In which of the following does the process of natural selection produce change ?
A: individual member of species
B: organisms that reproduce asexually only
C: population of species
D: animal species only
Answer:
Can confirm it is A
Explanation:
The process of the natural selection produce change occurs when there is the individual member of species.
What is species and natural selection?It refer to the group of the organism where it should be reproduced in a natural way with one another and also developed the fertilization off-spring.
The organism that does reproduction at a se-xually only, the species population, and the animal species should not change the natural selection.
It is the process via which populations of living organisms should be adapt and change.
Therefore, the option A is correct.
learn more about an natural selection here: https://brainly.com/question/15741393?referrer=searchResults
What cells are in the Digestive system
Answer: Mucous cells: secrete an alkaline mucus that protects the epithelium against shear stress and acid.
Parietal cells: secrete hydrochloric acid.
Chief cells: secrete pepsin, a proteolytic enzyme.
Explanation:
Practice 4: Examine the diagram to see some stars and observation positions, then choose ALL true statements by putting YES or NO next to each statement.
______ An observer at Position B would see Star Y as the brighter star
______ An observer at Position A would see Star Y as the brighter star
______ An observer at Position B would see Star X as the brighter star
______ An observer at Position A would see Star X as the brighter star
Answer:
Yes
No
No
Yes
Position B is closer to Star Y than it is to Star X => Star Y is brighter to B
Position A is closer to Star X than it is to Star Y => Star X is brighter to A
PLS HELP I NEED THIS BY TODAY ASAP
What figurative term is "merry hell"?
onomatopoeia
personification
oxymoron
hyperbole
What is the effect of an increased concentration of calcium ion in the sarcoplasm?
Answer:
When calcium concentration increases during depolarization, it shifts the conformation of troponin and tropomyosin, and actin is able to associate with myosin. As calcium is taken up again by the sarcoplasmic reticulum the muscle cell relaxes.
The effect that can be associated with increase in concentration of calcium ion in the sarcoplasm is :
Changing of shape and position of tropomyosin.
Can also cause muscles stiffness.
When the Ca2+ concentration become high in the sarcoplasm, there would be change in the position of tropomyosin as result of the binding effect of Ca2+ binds on troponin.Then the tropomyosin will be moved away from myosin binding sites on actin, then a cross bridge will be formedHowever, the effect if this on muscles is muscles stiffness.
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If a diploid cell has 20 chromosomes, how many chromosomes will be in its haploid cell? If a germ cell has 10 chromosomes, how many chromosomes will be in its somatic cells? If a cell in G1 phase has 4 chromosomes, how many chromosomes will it have by the end of meiosis? If an unknown cell is going through mitosis, is it a germ cell or a somatic cell? By the time an unknown cell finishes meiosis, is it a haploid or somatic cell?
Answer:
20
Explanation:
I'm randomly guessed
how many total atom are repsentanted in the formula caco3
Aeroplanes can fly ,just like birds.However,they are not considered living organisms .Give 4 reasons
Based on the cell cycle, if you were going to look at a group of cells under a microscope, how many cells would be in interphase and how many would be in mitosis?
How have plants adapted to different environmental conditions?
Answer:
Plants adapt to their environment from necessity. Plants may also adapt by growing lower and closer to the ground to shield themselves from wind and cold. Desert environments may have some of the following adaptations, these help the plant to conserve food, energy and water and still be able to reproduce effectively.
Explanation:
which one is the unit of mass
Answer:
the SI unit of mass is Kg
Explanation:
What's the total number of different arrangements in dna molecule with 2 base pairs?
Answer:
23
Explanation:
What does the word petrified mean?
Answer:
verb (used with object), pet·ri·fied, pet·ri·fy·ing.
to convert into stone or a stony substance.
to benumb or paralyze with astonishment, horror, or other strong emotion:
I was petrified with fear.
to make rigid or inert; harden; deaden:
The tragedy in his life petrified his emotions.
verb (used without object), pet·ri·fied, pet·ri·fy·ing.
to become petrified.
Explanation:
mark me brainliest cs why not ?
Answer:
Extremely frightened that one is unable to move or speak in the moment, also a change of material into rock like substance scientifically.
Which component makes each amino acid unique?
Amino group
Carboxyl group
R group
Phosphate group
Answer:
The best answer is R group. An R - group is a chemical group or side chain that is found attached to the central carbon in amino acids
Explanation:
R group
Explanation: thanks to the person above ^
And Magiic Jaaaay for asking the question! remember to stay safe, happy learning.
PLZZZ HELPPPPPPPPPPPPPPPPP!!!
Answer:
Explanation:
#5, The formula is for photosynthesis, you can tell because it produces glucose (C6H12O6) And it uses light. Circle everything after the arrow since those are the products produced by the plant.
#6 is cellular respiration because it’s turning glucose into energy. Again circle everything after the arrow!
A woman is found to have 47 chromosomes, including 3 X chromosomes. This condition likely resulted from _________________ during meiosis.
a.) karyotyping
b.) nondisjunction
c.) crossing over
d.) synapsis
Answer:
b.) nondisjunction......
A woman is found to have 47 chromosomes, including 3 X chromosomes. This condition likely resulted from nondisjunction during meiosis.
What do you mean by Chromosomes?Chromosomes may be defined as tiny, threadlike structures inside most cells of every organism, or living thing which carries the genetic information.
The presence of 3 X chromosomes indicates the condition of trisomy which arises as a result of non-disjunction.
When homologous chromosomes fail to separate at meiosis resulting in a germ cell containing 24 chromosomes rather than 23.
Therefore, a woman is found to have 47 chromosomes, including 3 X chromosomes. This condition likely resulted from nondisjunction during meiosis.
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The study of fossil succession allows
O matching of similarly-aged rocks from different outcrops
O the study of habits of extinct mammals
O recognition of the kings of the beasts in past times
O absolute dating of fossil-bearing strata
True or False: When a biotic factor dies, the molecules within that
organism enter into the nutrient cycle.
Answer:
Explanation:
True
When a biotic factor dies, the molecules within that organism enter into the nutrient cycle is a true statement.
Biotic factors:
There are two factors in a living system. Biotic and abiotic. all living organisms are biotic components. Plants, animals, and other living components are biotic components. Air, water, and sunlight are abiotic components.
Biotic and abiotic components together make the nutrient cycle. When biotic components die their molecules enter the nutrient cycle. Microorganisms act on the biotic component when they die.
They release carbon, hydrogen, and other molecules into the atmosphere when they die.
Therefore, When a biotic factor dies, the molecules within that organism enter into the nutrient cycle is a true statement.
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Yellow seeds are dominant over green seeds. Two heterozygous yellow seeded pea plants are crossed. What percentage of the offspring will be yellow?
Answer:
Being A=yellow
the two partners have genotype Aa
The possible genotypes from the pinner's square are: AA, Aa, Aa, aa
The percentage of the offspring will be yellow is: 25%
In Drosophila, the gene for red eyes, R is dominant to the allele for white eyes , r. This is sex-linked . Determine the possible genotype and phenotype ratios expected from a cross between:
Answer:
B) XRxr XrY
XRXr,XRY,XrXr,XrY
Genotype ratio:1:1:1:1
Phenotype ratio: 2:2 50% white, 50% red
C) XRXR, XrY
XRXr,XRY,XRXr,XRY
Genotype: 2:2
Phenotype: 100% white
D) XRXR,XRY
XRXR,XRXR,XRY,XRY
Genotype: 2:2
Phenotype: 100% white
A baker activates yeast cells with hot water, and adds sugar as their source of food. As the yeast begin their metabolic processes, the bowl it is in is covered with plastic so that no oxygen can get to them. At this point, the yeast will __ *
1 point
a. produce far more ATP than is necessary in response to the lack of oxygen
b. continue to go through aerobic respiration if enough sugar is present
c. die since all living organisms need oxygen to survive.
d. perform anaerobic respiration in the absence of oxygen
Answer:
The correct answer would be - option D. perform anaerobic respiration in the absence of oxygen.
Explanation:
Yeast is a facultative anaerobic single-cell organism that can live without oxygen. If yeast cells did not get the oxygen they use anaerobic respiration to get the energy.
If the baker activates these cells and stops them to get oxygen the yeast cells have to switch to anaerobic respiration to survive and produces ethanol and releases carbon dioxide.
True or False: Our organ systems work separately and do not interact with each other at all in our bodies