Meosis results into genetic variability through:
Fertilization, cross-over and independent assortment.
In Fertilization, the process leds to genetic diversity by allowing each parent to contribute to a specific set of genes to a zygote.This process depends on meiosis to create a haploid gametes where fertilized cells restore a diploid number.Crossing over occurs in the prophase stage of the meiosis 1 where a double chromatid homologous pairs of chromosomes exchange chromosome segments as they cross over each other.This makes genes from each parent to mix and result into a different genetic composition.Chromatid assortment happens in meosis 11 where sister chromatids separate and move to the daughter cells.The crossover that occursin meosis 1 results to non-identical chromatids in meosis 11 chromosome.What’s the purpose of natural selection
According to evolution it is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
There are millions of different species of animals, plants, and microorganisms. Which of the following factors do biologists consider to be the most important when classifying organisms?
A. details of internal and external body structures
B. environmental conditions of the organisms' habitats
C. inherited and acquired behaviors
D. general appearance
If these are the options the answer is A
Which of the following is a chemical reaction?
Chemical reactions occur when the bonds between reactant molecules are broken and new bonds are established and formed between product molecules, resulting in the formation of a new compound.
It's crucial to understand what is physical changes and chemical changes when talking about chemical reactions.
A physical change primarily results in a change in the state of the material or substance, whereas;A chemical change primarily results in the formation of a newly formed compound wherein energy is either released or absorbed.For a chemical reaction to occur it implies that a chemical change must encounter physical changes such as the production of heat, changes in color, etc.
From the given option, the digestion of food undergoes a chemical reaction because a huge amount of macromolecules are being digested and broken down into simpler molecules in the presence of enzymes.
Other options are physical changes occurring such as evaporation of rubbing alcohol, freezing of water e.t.c.
Therefore, we can conclude that the chemical reaction among the given options is: digestion of food
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Answer:
E. Evaporation of rubbing alcohol
“Vesicles bud off the golgi or ER and fuse with the plasma membrane to expel their contents into the extracellular fluid”.... what type of active or passive transport is this?
Final answer:
Exocytosis, the process by which vesicles release contents outside the cell after fusing with the plasma membrane, represents an active transport mechanism that requires energy.
Explanation:
When vesicles bud off the Golgi apparatus or endoplasmic reticulum (ER) and fuse with the plasma membrane to expel their contents into the extracellular fluid, this process is known as exocytosis. Exocytosis is a type of active transport because it requires energy to move substances against their concentration gradient. This process is essential for various cellular functions such as removing undigested waste, secreting hormones, enzymes, and transporting substances across cellular barriers.
5. RNA...
a. is double-stranded like DNA
b. has the same four nitrogen bases as DNA
c. contains ribose
d. contains thymine
6. The pattern of base pairing in DNA can be summarized by the rule that...
a. purines always pair with purines
b. any purine can pair with pyrimidine
c. pyrimidines only pair with pyrimidines
d. adenine pairs with thymine, and cytosine pairs with guanine
7. DNA replication...
a. involves RNA polymerase
b. occurs at one site
c. requires a DNA molecule to start the process
d. needs several days' time to occur
8. Transporting amino acids to ribosomes for assembly into needed proteins is the function of...
a. DNA
b. mRNA
c. rRna
d. tRNA
9. Transcription occurs...
a. at ribosomes
b. in the cytoplasm of the cell
c. in the nucleus of the cell
d. as the last step in protein synthesis
Option C is correct.
c. contains ribose.
Explanation:RNA stands for ribonucleic acid. It is an important molecule with long chains of nucleotides. A nucleotide contains a nitrogenous base, a ribose sugar, and a phosphate. It is single stranded and it contains uracil base that is not present in DNA.
ANSWER 6:option D is correct.
d. adenine pairs with thymine, and cytosine pairs with guanine
Explanation:In DNA purines always make bond with pyrimidine and pyrimidine make bond with purines, so there are double bond between adenine and thymine and triple bond between cytosine and guanine.
Answer 7:Option A is correct.
a. involves RNA polymerase
Explanation:DNA polymerase is a vital enzyme in DNA replication. DNA polymerase is an enzyme that synthesizes DNA molecules from deoxyribonucleotides, the building blocks of DNA.
Answer 8:Option D is correct.
d. tRNA
Explanation:The job of tRNA is to read the message of nucleic acids, or nucleotides, and translate it into proteins, or amino acids. tRNA transport amino acids to ribosomes for the assembly of protein.
Answer 9:Option C is correct.
c. in the nucleus of the cell
Explanation:Transcription is the process of making mRNA from the strand of DNA. In this way the message of DNA is encoded into RNA. Transcription always occurs in nucleus of the cell.
Which experiment lead to changes to the original cell theory
The experiment that led to changes to the original cell theory ARE THE EXPERIMENTS THAT SHOWED THAT ALL CELLS ARE SIMILAR IN HOW THEY METABOLIZE AND IN THEIR COMPOSITION.
Scientists always update existing theories to reflect new emerging scientific facts and this was what happened to the cell theory. Some changes were made to the theory when it was discovered that all cells are identical when it comes to composition and metabolism.
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what is it called when vesicles are used to move substance into a cell
Endocytosis.
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-Payshence
Answer: Endocytosis
Explanation: Endocytosis can be defined as the process by which the substances are brought inside the cell.
The material that is taken inside the cell is surrounded by an area of the cell membrane which buds off within the cell to from vesicle which consists of the ingested material.
It includes and cell drinking( pinocytosis) and cell eating (phagocytosis). It takes place by the help of energy that why known as active transport.
What is not a method for disposing of hazardous wastes?
A) Controlled incineration
B) Sanitary Landfills
C) Waste exchange
D)Deep-well injection
after meiosis __genetically different cells are formed
4 gentically different cells are formed
you are planning a experiment to find out whether the rate at which water freezes depends on the shape of its container and identify the manipulate variable and the responding variable. list the other variables you would control.
Controlling variables would include the shape of the container, its volume (you should have several containers of the different shape but same volumes) and the ambient temperature that the container is inserted into (assuming that this temperature remains constant during the freezing process).
Which sentence represents a hypothesis
I can't see the whole image, but I would say A, since it is the only statement. B and D are steps in the experiment, and D is a question, not a statement.
What made Cumberland Road important during the 19th century?
It was the first time stones were used as a surface.
It was the first time a road went to many towns and cities.
It was a very dangerous road.
It was Americas first toll highway.
The answer is B, I did the test
The Cumberland Road was important during the 19th century because it was the first time a road went to many towns and cities.
The Cumberland Road was the first improved federal highway in the United States. The road was built between 1811 and 1837 by the federal government for people to reach the western settlements. The 1,000 km road is connected to many towns and cities. It extends from Cumberland Md to Vandalia, Potomac and Ohio Rivers.
Which pathogen survives during cooking (heating)?
A.
E. Coli
B.
Giardiases
C.
Hepatitis A
D.
Salmonella
Salmonella survives during cooking
Answer:
C. Hepatitis A
Explanation: answer on plato
Which statement is true about folding in sedimentary rock layers?
A. Overturned folds have no trough.
B. Downfolds are called synclines.
C. Upfolds are called synclines.
D.Symmetrical folds are called monoclines.
The correct option is (B) Downfolds are called synclines.
Explanation:There are three basic types of folds (1) anticlines, (2) sync-lines and (3) monocline. Among these folds Sync-lines are formed when rocks are compressed by plate-tectonic forces. They can be as small as the side of a cliff or as large as an entire valley. Sync-lines are the folds of rock layers that slope downward on both sides of a common crest. So option B is the correct option.
The correct option is B. The statement true about folding in sedimentary rock layers is Downfolds are called synclines.
To understand why option B is the correct answer, let's review the definitions of the terms used:
- Folds in geology refer to bends or wrinkles in rock layers. These can form due to compressional forces that shorten and thicken the Earth's crust.
- Anticlines are upfolds in which the rock strata bend upward into an arch. The oldest rock layers are found at the core of an anticline.
- Synclines are downfolds in which the rock strata bend downward into a trough. The youngest rock layers are found at the core of a syncline.
- Monoclines are a type of step-like fold in which one side of the fold remains nearly horizontal, while the other side dips steeply. They are not symmetrical.
- Overturned folds are folds that have been tilted beyond vertical, so that the original upside-down sequence of strata is visible. Even in overturned folds, the terms anticline and syncline are still used based on the original orientation of the strata before tilting.
Given these definitions:
A. Overturned folds do have a trough, but it may not be as easily identifiable due to the extreme tilt of the rock layers. However, the concept of a trough still applies.
B. Downfolds are indeed called synclines, which is consistent with the definition provided above.
C. Upfolds are called anticlines, not synclines.
D. Symmetrical folds are not called monoclines; rather, monoclines are characterized by an asymmetrical, step-like structure.
Therefore, the statement that Downfolds are called synclines (option B) is the true statement about folding in sedimentary rock layers.
Global climate change is the result of increasing levels of carbon dioxide, methane, and other greenhouse gases in Earth's atmosphere. How are the causes of ocean acidification and climate change related to one another?
A.
Acids in the ocean decompose to form carbon dioxide, which then diffuses into the atmosphere.
B.
Warmer ocean temperatures increase the stability of carbonic acid and other acids in the water.
C.
Carbon dioxide diffuses from the atmosphere to the ocean, where it reacts to form carbonic acid.
D.
Methane diffuses from the atmosphere to the ocean, where it reacts to form methanoic acid.
Carbon dioxide diffuses from the atmosphere to the ocean, where it reacts to form carbonic acid. The correct option is C.
What is ocean acidification?Ocean acidification is the term used to describe a long-term drop in the pH of the ocean that is mostly due to the ocean's absorption of atmospheric carbon dioxide.
The vast amount of carbon dioxide that the ocean is absorbing dissolves as carbonic acid in saltwater.
Ocean acidification is a process that is literally changing the sea and endangering the basic chemical equilibrium of ocean and coastal waters from pole to pole.
Global warming is being caused by an increase in greenhouse gases, primarily owing to human activity. Global warming is a result of deforestation and an increase in air, water, and land pollution.
From the atmosphere, carbon dioxide diffuses to the ocean, where it reacts to produce carbonic acid.
Thus, the correct option is C.
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Which of the following is exclusively a natural resource of carbon dioxide?
A. Clearing land with fire
B. Coal Power Plants
C. Decomposition
D. Photosynthesis
Decomposition because using the process of elimination, you can see that photosynthesis uses CO2 therefoe, it isn't the answer. The other answers A and B aren't natural sources. That would leave Decomposition as the answer.
Decomposition is a process in decaying of rotting. The thermal decomposition of CO2 to CO and O2 is a possible way for the waste and utilization of CO2. However, this effect is confined by both the thermodynamic stability and the kinetic boundary. At 900 degrees C, this catalytic method achieves 100% of CO generation selectivity at 15.8% of CO2 changes.
If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes of a yellow offspring
PLS HELP Magnesium + hydrochloric acid → magnesium chloride + hydrogen Mg + 2HCl → MgCl2 + H2 In this reaction: Magnesium (Mg) is a Hydrogen (H2) is a magnesium chloride (MgCl2) is a hydrochloric acid (HCl) is a
Answer:
Magnesium (Mg) is a - reactant
Hydrogen (H2) is a - product
magnesium chloride (MgCI2) is a - product
hydrochloric acid (HCI) is a - reactant
On the left-hand side of the equation, reactants are listed as beginning ingredients. Products are listed on the right-hand side of the equation as the outcome of the reaction.
What are the reactant and product of the reaction?Chemical reactions result in the transformation of reactants (what you start with) into products (what you end with). An arrow separates the reactants, which are displayed on the equation's left side, from the products, which are displayed on the right.
The components that initiate a chemical reaction are known as reactants. The compounds created by the chemical reaction are known as the products.
Therefore, Magnesium (Mg) is a—reactant, Hydrogen (H₂) is a – product, magnesium chloride (MgCI2) is a – product, hydrochloric acid (HCI) is a – reactant.
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What is used to represent something too big or too small to be observed directly
An equation or physical object that represents something that is too big, too small, too fast, or too slow to observe directly. Constant.
What do you notice about the products in cellular respiration and reactants in photosynthesis? Plz Halp
The reactants of one are the products to the other, the products of one are the reactants to the other. Opposites. I believe that is the answer.
Cellular respiration involves the reversal of the products and reactants of photosynthesis: Water and carbon dioxide, the byproducts of cellular respiration, serve as the reactants in photosynthesis. The byproducts of photosynthesis, oxygen and sugar, are the reactants in cellular respiration.
What products in cellular respiration and in photosynthesis?While photosynthesis utilizes carbon dioxide and releases oxygen, cellular respiration uses oxygen and creates carbon dioxide.We and the majority of other species use the released oxygen for cellular respiration.
The byproducts of cellular respiration include water, ATP, and carbon dioxide. Two carbon dioxide are created as acetyl-CoA is created from pyruvate.
Therefore, During the Krebs cycle, four more carbon dioxide are created. This carbon dioxide is circulated in the blood before being absorbed by the lungs.
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Specialized cells and organs are necessary in multicellular organisms becasue in these organisms
Fewer cells are in direct contact with the external environment
The type of organism that can transfer the energy of sunlight to sugars and ATP is called an
The answer to you question autotroph
I hope it helps you
Wild salmon spend most of their lives in the ocean but return to freshwater rivers to spawn, or reproduce. Most wild salmon will only spawn in specific spawning grounds in the rivers in which they were born. The construction of hydroelectric dams in rivers has blocked the paths of some salmon returning to their spawning grounds. This has led to population declines. Which method would be most effective in preventing further wild salmon population declines caused by the construction of hydroelectric dams?
A.
constructing passageways next to dams to allow salmon to swim around blocked rivers
B.
establishing protected regions around wild salmon spawning grounds in specific rivers
C.
observing the migration patterns of wild salmon by tagging and tracking a small sample of fish
D.
monitoring genetic diversity by using netting to catch salmon and obtain genetic samples
Answer: A
Constructing passage ways near the dams to allow to salmon to swim around blocked rivers.
The construction of dams in rivers has blocked the path of some salmons returning to spawning grounds. The best way to overcome this is to make the passage ways near the dams to allow salmons to swim in areas which have blocked due to dams. So that salmons can returned to the spawning ground and can spawn which leads to increase in their population.
Answer and Explanation:
Answer: A
Constructing passage ways near the dams to allow to salmon to swim around blocked rivers.
The development of dams in streams has hindered the way of certain salmons getting back to bringing forth grounds. The most ideal approach to defeat this is to make the entry ways close to the dams to permit salmons to swim in regions which have impeded because of dams. So salmons can got back to the producing ground and can generate which prompts increment in their populace.
A geologist finds a large rock containing a fern fossil. This kind of fern grew on land in hot, moist climates. What does this tell you about the area at the time the rock was formed?
A.
The area was covered by an ocean.
B.
The area was snowy and cold.
C.
The area was hot and tropical.
D.
The area was muddy and wet.
Hot and Tropical.
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An example of a pioneer species is? 1.A Sparrow 2. a lichen 3. An Earthworm 4. A spider
Lichen.
Hope this helps!
Answer: 2/B
Explanation:
contractile vacuoles maintain water balance by pumping excess water out of some single-called pond organisms . in multi-cellular humans , the kidney is chiefly involved in maintaining water balance .
A: interference with nerve signals disrupts cellular communication and homeostasis withing organisms
B: a disruption in a body system may disrupt the homeostasis of a single - celled organism
C: structures found in single- celled organism can act in a manner similar to tissue and organs in multi-cellular organisms
D: tissues , organs, organ systems work together to maintain homeostasis in all living things
I need help with a quiz and i have 20 more questions if you will be willing to help with it send me your email and i will send all the questions to you
Answer:
C: structures found in single- celled organism can act in a manner similar to tissue and organs in multi-cellular organisms
Explanation:
The question above shows a certain similarity in the function of structures of unicellular and multicellular organisms. As we can see, vacuoles are indispensable in balancing water within single-celled organisms. This function is similar to the function of the kidneys, in multicellular organisms, which is also responsible for the balance of water.
In addition, the function of the kidneys is, among others, to filter the blood to eliminate substances harmful to the body, such as ammonia, urea and uric acid. They also work to secrete substances important to our health. The kidneys receive blood from the renal arteries, branches of the aorta that come directly from the heart.
Worth 30 points! Which cell part provides a similar function in a plant cell?
A.Golgi apparatus
B.Cell Membrane
C.Large Central Vacuole
D.Pili
B. cell membrane all cells have a cell membrane to protect the cell
An object that does not transfer heat easily, such as wood, is called an
A) metal
B) conductor
C) insulator
D) capacitor
I am pretty sure it's C. Insulator.
Jack is learning to play the piano he knows that a piano has 88 keys and that there are 12 unique keys in each group called an octave how many complete octaves are on a piano
show work
math
All you would have to do for this is divide 12 by 88. So, 88/12 is 7.333333. That isn't a full number, which is probably what is confusing you. Although, since the question is asking for how many COMPLETE octaves on a piano, it would be 7 because there are 7 complete octaves, and a little more.
By dividing the total number of piano keys (88) by the number of keys in an octave (12), we find that a piano has 7 complete octaves.
To calculate the number of complete octaves on a piano with 88 keys, where each octave consists of 12 unique keys, we can perform a simple division operation. By dividing the total number of keys by the number of keys in an octave, we get the number of octaves:
88 keys \ 12 keys per octave = 7 octaves with 4 extra keys
Therefore, a piano with 88 keys has 7 complete octaves. The leftover 4 keys indicate that the piano does not have a complete eighth octave.
Which term describes the difference in the concentrations of a substance across a cells membrane
concentration gradient is the answer