Answer:
Founder effect.
Explanation:
Migration refers to the movement of a group of people or other living organisms from one geographical region (location) to another geographical destination or colony in search of better living conditions, food, water supply, work or social amenities.
According to the founder effect, a group of individuals or living organisms from a larger population can migrate to a new area in search of better living conditions and establish a colony, which will be highly susceptible to genetic drift.
Compare and contrast the cell structures / organelles found in plant and animal cells.
list 3 organelle/structures plant and animal cells have that are the same
list 2 organelles/structures plant and animal cells have that are different
Answer:
They both have a cell membrane.
they both have a nucleus
they both have the endoplasmic reticulum
Explanation:
One has a cell wall
one has a big vacuole and the other have many little vacuoles
The image below shows one of the earliest stages of DNA replication. What
role does helicase play in DNA replication?
A. Helicase breaks the hydrogen bonds and unwinds a section of DNA.
B. Helicase connects the floating nucleotides to the template strands.
C. Helicase checks the base pairs in each new strand of DNA.
D. Helicase bonds together pieces of DNA as new strands form.
Answer:DNA helicases are also called molecular motors. They unwind the DNA with the help of ATP hydrolysis, and thus facilitate the replication and transcription processes. ... Studies have suggested that DNA helicases may play a role in plant DNA recombination, as it is prominent during the meiotic prophase of plants.
Explanation:
Role played by Helicase in DNA Replication is to break down the hydrogen bonds and unwinds a section of DNA.
What is DNA?
DNA, or deoxyribonucleic acid, is the hereditary material in humans located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).
Mitochondria are structures within cells that convert the energy from food into a form that cells can use.
The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T).
Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people.
The order, or sequence, of these bases determines the information available for building and maintaining an organism, similar to the way in which letters of the alphabet appear in a certain order to form words and sentences.
What is DNA Replication?In molecular biology, DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule.
DNA replication occurs in all living organisms acting as the most essential part for biological inheritance and it is essential for cell division during growth and repair of damaged tissues, while it also ensures that each of the new cells receives its own copy of the DNA.
The cell possesses the distinctive property of division, which makes replication of DNA essential.
DNA is made up of a double helix of two complementary strands. The double helix describes the appearance of a double-stranded DNA which is composed of two linear strands running opposite to each other and twist together to form.
During replication, these strands are separated. Each strand of the original DNA molecule then serves as a template for the production of its counterpart, a process referred to as semiconservative replication.
As a result of semi-conservative replication, the new helix will be composed of an original DNA strand as well as a newly synthesized strand.
Cellular proofreading and error-checking mechanisms ensure near perfect fidelity for DNA replication.
What is the role of Helicases in DNA Replication?Helicases are enzymes that bind and remodel nucleic acid or nucleic acid protein complexes.
Helicases are of two types- DNA Helicases and RNA Helicases.
Role of Helicases:
- Separate the double stranded DNA into single one to allow copying.
- Initiate synthesis at the origin of unwinding
- Helicases use the energy stored in a molecule called ATP, which serves as the energy currency of cells, to break the bonds.
- DNA helicases also function in other cellular processes where double-stranded DNA must be separated, including DNA repair and transcription.
- RNA helicases are involved in shaping the form of RNA molecules, during all processes involving RNA, such as transcription, splicing, and translation.
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‼️⁉️need answer ASAP ‼️⁉️Which property describes a mixture? Cannot be separated by physical methods. It has a Single Chemical composition. It cannot have more than one state of matter. It cannot be described by a chemical symbol or formula.
Answer: It cannot be described by a chemical symbol or formula
Explanation:
A mixture isn't chemical-- it's purely physical. So, no chemical symbol or formula could be used to describe it.
Complete the sentences with the appropriate words Cells use ____________ to power most cellular activities that require work.
Answer:
ATP
Explanation:
What m-RNA strand would be formed from the DNA strand below?
T G A C G T A
A C T G C A T
Answer:
A C U G C A U U G A C G U A
Explanation:
because Adenine always pairs with Uracil and guanine with cytosine. you can also remember it as Apple Tree and Car Garage.
Mr. Lim wants to start a sustainable oil palm plantation. In your opinion, how can Mr.Lim control the rat population that frequently destroy crops?
Answer:
hope it helps
Explanation:
He can grow a cat or birds.
He can set up traps.
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can someone go to my profile and write the definitions in your own words that I posted today? there are 4 of them and I can give you brainliest for each of them since there would be more than one person.
Thank you!
Answer:
ok i go
Explanation:
your experience is so so good and your frofile
Identify the structures in the cell pictured on the right:
Label A
Label B
Label C
Label D
Label E
Options:
1.DNA
2.Nucleus
3.Cytoplasm
4.Cell Membrane
5.Ribosomes
Answer:
1d
2a
3b
4e
5c
is the correct answer for questions
Answer:
B
C
E
A
D
Explanation:
correct edg 2021
Many antibiotics work by preventing the proper synthesis of the peptidoglycan cell wall. These antibiotics are most likely to be effective against what types of bacteria
Answer: Gram-positive bacteria.
Explanation:
Gram-positive bacteria are those bacteria that stain dark blue or violet by Gram staining. This is due to the structure of the cell envelope, since they possess a cell wall composed of a thick layer of peptidoglycan, which surrounds the previous one. The cell wall is attached to the cytoplasmic membrane by lipoteichoic acid molecules. The peptidoglycan layer confers high resistance to these bacteria and is responsible for retaining the stain during Gram staining. Unlike gram-positive bacteria, gram-negative bacteria have a second lipid membrane outside the cell wall and a single peptidoglycan layer.
An antibiotic is a chemical substance produced by a living being or synthetically derived, which kills or prevents the growth of certain classes of sensitive microorganisms, such as bacteria. An antibiotic could be bacteriostatic if it prevents the growth of bacteria or bactericidal if it destroys them.
Antibiotics usually attack cell walls, such as β-lactams that act on the peptide chains of the bacterial cell wall. That is, they act by inhibiting peptidoglycan synthesis. This is why gram-positive bacteria are susceptible to certain types of antibiotics because they possess a large amount of peptidoglycan.
What can our nerves respond to?
They can respond to external stimuli
N a garden with trees and shrubs, green and pink katydids were observed. Over time, birds started feeding on the katydids. Which two statements describe what will eventually happen to the population of the katydids?
Answer: A.The population of pink katydids will decrease.
B.The population of green katydids will decrease.
Explanation:
The two statements describe what will eventually happen to the population of the katydids are that:
• A.The population of pink katydids will decrease.
• The population of green katydids will decrease.
This is because from the information given, since birds started feeding on the katydids, this will result in the reduction in the number of katydids. Hence, the decrease in both the pink and the green katydids.
Answer: A: The population of pink katydids will decrease.
C: The population of green katydids will increase.
Explanation: The birds that feed on the Katydids will see the pink ones due to the green ones being camoflauged. The pink katydids will decrease and the green katydids will increase.
There are sixty-one mRNA codons that specify an amino acid, but only forty-five tRNAs. This is best explained by the fact that
Answer:
See the answer below
Explanation:
The phenomenon is best explained by the fact that the genetic codes are degenerates. In other words, more than one codon can specify for the same amino acid being carried by the tRNA.
The base-pairing rule between the third nucleotide of a codon and that of the anticodon on the tRNAs loosens off. For example, GUU, GUC, and GUA all specify for the amino acid valine while GCU, GCC, and GCA all specify for alanine.
which structure is found in both plants and animal cells
Answer: Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane.
Answer:
the nucleus
Explanation:
what state of matter is ice ? A, element B. gas C. liquid D. solid
Which of the following is NOT a purpose
that the flower serves in an angiosperm?
A. protects the seed in the ovary
B. collects pollen for fertilization
C. attracts pollinators
D. transfers seeds away from plant to grow
Answer: It’s D
Explanation:
I did B and it wasn’t the answer♂️
The transfers seeds away from plant to grow is not a purpose that the flower serves in an angiosperm. Thus, option D is correct.
What is five kingdom classification?The main purpose of the classification of the Five kingdom has been known R.H. Whittaker. The five kindoms that has were included in this proposal were the Fungi, Protista, Monera.
Animalia as well as the kingdom Plantae. There are mainly five criteria or the conditions based on which the classification has been madeup of. These criteria has been includes the structure of the cell, as well as the nutrition mode, organisation of the thallus, or the relations of reproduction and phylogenetic.
Based on shoe characteristics they were to develop a classification hierarchy of shoes, beginning with the shoe "kingdom" and becoming more and more specific, just like scientists did for the classification of living things.
Therefore, The transfers seeds away from plant to grow is not a purpose that the flower serves in an angiosperm. Thus, option D is correct.
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Describe a situation from the news or recent history where scientists were called upon to provide explanations of events and offer possible solutions to problems.
Answer:
climate change
Explanation:
scientists are telling people what to do to save the planet
The great hornbill and the toucan both eat the same fruit, insects, and nuts. They both live in the rainforest. Their large bills function to get food and also as warning coloration. Which of the following is a limiting factor to the toucan population?
overlapping breeding seasons
bill coloration
genetic variability
competition
The correct answer is D. Competition.
Explanation
A limiting factor is a term that refers to the scarcity factor of a resource that limits the development and evolution of a specific species or process. According to what is described in the question, it can be inferred that the limiting factor of toucans is competition because the great hornbill lives in the same tropical forest as the toucan, it feeds on the same foods as the toucan: fruit, insects, and walnuts. So, competition for the same resources is a limiting factor for toucans since the absence of food can affect their development. So the correct respect is the D. Competition.
True or false: Cellular microbes are often arranged in multicellular complexes with differentiated tissues.
Answer:
False
Explanation:
A new small molecule drug inhibits the function of the APC/C. If this drug were applied to cells undergoing the cell cycle, what do you think would be the result
Answer:
The cycle will not be completed.
Explanation:
The cell cycle will not be completed because the drug inhibits the function of the anaphase promoting complex whose functions is to regulate progression through the mitotic phase of the cell cycle and to control entry into S phase. If the drug inhibits the anaphase promoting complex, the cell cycles will not move in the forward direction to enter to the S phase in order to complete the cell cycle.
Chapter 1: Cells Exercise Multiple Choice Question 1. A cell has mitochondria, centrosome with centrioles, nucleus and other cell organelles. Based on this information, this cell could be a cell of A, an apple. B. a yeast. Co a cat. D. a flower
Answer:
C. a cat
Explanation:
only animals have centrosomes.
hope this helps!
During glycolysis, glucose is broken down into two molecules of pyruvate.
A diagram shows the conversion of a glucose molecule to 2 pyruvic acid molecules. In this process, 2 A T P form 2 A D P, 2 N A D produce 2 N A D H, and 4 A D P produce 4 A T P.
What is the main transformation that occurs during glycolysis?
Glycolysis produces ATP and pyruvate by oxidizing water.
Glycolysis produces ATP and pyruvate by oxidizing glucose and NAD+.
Glycolysis produces pyruvate, ATP, and NADH by oxidizing glucose.
Glycolysis produces CO2, ATP, and pyruvate by reducing glucose.
Answer:
Glycolysis produces pyruvate, ATP, and NADPH by oxidizing glucose. During cellular respiration, glucose combines with oxygen to form carbon dioxide, water, and ATP.
Explanation:
Answer:
C.
Explanation:
what statement is true for both photosynthesis and cellular respiration?
A. it occurs in consumers?
B. it occurs in producers
C. it produces carbon dioxide
D. it produces oxygen
Select the correct answer. Which statement correctly explains the polarity of the water molecule? A. The hydrogen end of the molecule has a partial negative charge and the oxygen end has a partial positive charge. B. The oxygen end of the molecule has a partial negative charge and the hydrogen end has a partial positive charge. C. Both ends of the molecule have a partial negative charge, which attracts the other water molecule towards itself.
Answer:
option B) The oxygen end of the molecule has a partial negative charge and the hydrogen end has a partial positive charge.
Justification:
The electronegativity of an element accounts for its relative ability to attract electrons.
Being oxygen more electronegative than hdyrogen (the electronegativity of oxygen is 3.44 while the electronegativity of the hydrogen is 2.20), the electron density will be displaced toward the oxygen, letting it with a partial negative charge and the hydrogen with a partial positive charge.
Finally, since the charge is not symmetrical distributed around a center of the molecule, the molecule ends being polar.
The physiologic effects of ______ include blood vessel constriction and decreased cellular metabolism.
Answer:
The physiologic effects of cryotherapy include blood vessel constriction and decreased cellular metabolism.
Explanation:
Cryotherapy is a treatment that uses cold to aid in the process of injury healing. One of the effects of low temperatures is vasoconstriction. As a result, the pressure increases, modifying the blood's flow and aiding in the healing process since blood circulation increases. The low temperatures also decrease cellular metabolism reducing the amount of oxygen that the cell needs. As a consequence, the cells have a higher chance of survival after the injury.
Which of the following is not true about hydrothermal vents?
A. They provide a look into what ancient life may have looked like.
B. They contain chemosynthetic organisms.
C. They cannot contain life of any sort.
D. They are found in volcanic areas under the ocean.
C, because that would contradict observations
Answer:
its (c) cz....
Explanation:
The floor of the deep ocean is almost devoid of life, because little food can be found there. But around hydrothermal vents, life is abundant because food is abundant. ... These vents are the only places on Earth where the ultimate source of energy for life is not sunlight but the inorganic Earth itself. hope it helps u I tried my best.pls mark me as branliestA man cannot be a carrier for hemophilia. Why?
Answer:
This means that males only have one copy of most of the genes on the X chromosome, whereas females have 2 copies. Thus, males can have a disease like hemophilia if they inherit an affected X chromosome that has a mutation in either the factor VIII or factor IX gene.
When amino acids are degraded for energy or glucose production, their amine groups are incorporated by the liver into ____.
Answer:
The correct answer is - urea.
Explanation:
In our body, to produce energy or produce glucose our body breaks the amino acids, it gets from proteins mainly. These amino acids are mainly breakdown into amine groups.
The human body has a unique ability to pack ammonia(amine group) by converting it to urea and incorporated and produced by the liver using 2 molecules of ammonia (NH3) and 1 molecule of carbon dioxide (CO2). This incorporated urea is then secreted from the liver and incorporated into the urine in the kidney for further process.
PLEASE PLEASE HELP ME WITH THIS PLEASE PLEASE HELP NOW PLEASE GOD PLUS YOU PLEASE please Help me please
Answer:
Sorry ...
Explanation:
Unfortuntely, you can only answer this question if you've read the book. Those reading this pretty much haven't.
in your own words, what is the definition for Lysine?
Some broad-spectrum proteases (protein hydrolyzing enzymes) and nucleases (nucleic acid hydrolyzing enzymes) that function in eukaryotic cells have an optimum pH close to 5.0, whereas the cytosol of most cells is closer to pH 7.0. Which part of a eukaryotic cell might you predict to have a low pH suited to maximizing the activity of these enzymes
Answer:
lysosome
Explanation:
The lysosome is a membrane-bound organelle found in nearly all eukaryotic cells. The lysosome contains different types of enzymes (i.e., proteases, nucleases, glycosidases, lipases, phosphatases) which are required for the digestion of macromolecules and microorganisms, and recycle macromolecules in the cell. These enzymes are only active in acidic (lysosome) conditions, and they can be deactivated in case of lysosomal rupture because in the cytosol the pH is neutral to slightly alkaline (∼7.3–7.4).
