Biology Middle School
Answers may vary. Meiosis results in four daughter cells, whereas mitosis produces only two daughter cells. Meiosis has two distinct phases, meiosis I and meiosis II, whereas mitosis takes place in a single cycle. Daughter cells in meiosis are genetically unique from one another. Mitotic daughter cells are genetically identical. Both mitosis and meiosis have similar basic steps (prophase, metaphase, anaphase, and telophase). Both mitosis and meiosis have cell cycle regulation mechanisms, including checkpoints and cell cycle regulators, which allow them to consistently produce normal cells.
Please find the answers to the blank spaces pertaining to reproduction in the questions below:
- A sex cell contains half of the number of chromosomes that its parent cell has. This is because the sex cell is formed as a result of meiosis.
- Cancer cells are less likely than normal cells to undergo apoptosis or programmed cell death. Apoptosis is a phenomenon whereby cells die in a programmed manner.
- The metaphase plate is the region within a dividing cell where chromatids and homologous chromosomes align in both mitosis and meiosis.
- Parthenogenesis occurs when an unfertilized egg cell i.e. an egg that has not been fertilized by a sperm cell, gives rise to an embryo. Parthenogenesis is a form of asexual reproduction more common in reptiles and fish.
- Meiosis is a kind of division which results in four haploid daughter cells that are genetically distinct from one another.
- The point where chromosomes cross over and exchange DNA during meiosis is called the chiasma (plural- chiasmata).
Learn more about reproduction at: brainly.com/question/7464705
During the final step of cellular respiration (electron transport chain & oxidative phosphorylation), the mitochondria pumps H+ ions from the matrix (the innermost part of the mitochondria) to the intermembrane space. This creates something called a concentration gradient. After all the H+ ions are pumped into this space, where do H+ ions want to move and more importantly why?
Overview of oxidative phosphorylation. The electron transport chain forms a proton gradient across the inner mitochondrial membrane, which drives the synthesis of ATP via chemiosmosis
In asexual reproduction , the cell of the offspring are produced by ? from the parent cells.
In asexual reproduction, the offspring cells are produced through processes such as budding, fragmentation, or self-fertilization, without the involvement of gametes or meiosis.
What is asexual reproduction?
Asexual reproduction is a type of reproduction that involves the formation of offspring without the involvement of gametes (sex cells). In this process, a single parent organism produces offspring that are identical to itself through processes such as budding, fragmentation, or self-fertilization.
The offspring that result from asexual reproduction inherit all of their genetic information from the parent organism, and therefore, do not undergo genetic recombination or variation that is typical in sexual reproduction. Asexual reproduction is common in many lower forms of life, such as bacteria, fungi, and some plants and animals, and can occur quickly and efficiently in ideal conditions.
Learn more about asexual reproduction, here:
The male produces the what ever it’s called
What are the species that no longer exist on earth known as
They fall under the category of “extinct”
Extinct. A species that no longer exists anywhere on Earth.
If a female frog has 13 chromosomes in her eggs, how many chromosomes would
be present in a normal body cell?
26 because the egg is a haploid cell that gets fused together with a sperm cell to create a zygote. An egg has only half the set of chromosomes a normal body cells needs, therefore there are 26 chromosomes present in a normal body cell.
3 because when you add the things
What would be the magnification of a specimen viewed with a compound light microscope that has an objective power of 100x and an ocular lens power of 10x? A) 90
2) This is the process of determining a specific age of an object.
Absolute Dating(Just did it on USA test prep)
It is also made up of carbon and radiocarbon
In the citric acid cycle, what does the ATP do?
ATP acts as a regulatory molecule in multiple steps of the citric acid cycle:
- An abundance of ATP inhibits the pyruvate dehydrogenase complex that converts pyruvate into Acetyl Co-A.
- ATP acts as an inhibitor for the enzymes, isocitrate dehydrogenase and α-ketoglutarate dehydrogenase.
- In bacteria, ATP is an allosteric inhibitor of the enzyme, citrate synthase.
In the citric acid cycle, the 2 pyruvate molecules formed can either be converted to Acetyl Co-A or stored as lipids. As the enzyme, pyruvate dehydrogenase has to make this decision, this step of the TCA cycle is a crucial control point of the pathway. Pyruvate dehydrogenase is activated when phophorylated by a kinase but deactivated in the presence of high amount of ATP by a phosphatase enzyme. On the contrary, the presence of high ADP activates the complex.
ADP or a low energy signal allosterically activates the isocitrate dehydrogenase that converts isocitrate to a five carbon alpha-ketoglutarate. High ATP inhibits the enzyme.
The enzyme, α-ketoglutarate dehydrogenase converts alpha ketoglutarate to a four carbon compound, succinyl Co-A. Here, ATP also acts as an inhibitor.
How does (inheritable) variation arise in any population?
Variation arise in any population by mutation , random mating between organisms , random fertilization , and crossing over between chromatids of homologous chromosomes during meiosis.
Genetic variation or Inheritable variation is a general estimation that identifies the existing genetic differences over the population. These differences take place in the DNA or Genes and each variation is known as an allele.
Thus Genetic variation is also defined as the variation in alleles of DNA or genes that takes place among and within the population. Each individual is adopted to its nature and environment.
The Genetic Variation is achieved by mutation, mating and fertilizing between random organisms and cross over of chromatids during meiosis(cell division).
What is the difference between a codon and an anti-codon
A codon is found on the coding strand of double-stranded DNA and in the (single-stranded) mRNA. ... The anticodon is found on the tRNA and is the part that base-pairs with the codon (on the mRNA) in order to bring the appropriate amino acid to the ribosome to be added to the growing peptide chain.
What are data types in biology
well i dont have a Answer but i can explain XD
Biological data comes in many formats. These formats include text, sequence data, protein structure and links. ... Sequence data is provided by GenBank, in terms of DNA, and UniProt, in terms of protein. Protein structures are provided by PDB, SCOP, and CATH.
What is cellular respiration
Cellular respiration happens in all eukaryotic cells and it occurs in the mitochondria, the powerhouse of the cell. cell resp breaks up glucose in order to create more ATP for the cell. the products that go IN are GLUCOSE and OXYGEN. the products that come OUT are CARBON DIOXIDE, WATER, and of course, ENERGY.
8) What is the manipulated variable in this experiment?
As the variables are not given, let us help with general explanation on manipulated variable.
A manipulated variable is an independent variable. In a scientific experiment, an independent variable can be described as a variable which can change naturally or which is changed by the researcher to check its effect on the dependent variable. The dependent variable is the variable which is under study and being tested.
For example, to check the difference in photosynthesis rate by light, the amount of light will be the independent variable and the rate of photosynthesis will be the dependent variable.
What is a stop codon
In the genetic code, a stop codon (or termination codon) is a nucleotide triplet within messenger RNA that signals a termination of translation into protein
Proteins are based on polypeptides, which are unique sequences of amino acids. Most codons in messenger RNA (from DNA) correspond to the addition of an amino acid to a growing polypeptide chain, which may ultimately become a protein. Stop codons signal the termination of this process by binding release factors, which cause the ribosomal subunits to disassociate, releasing the amino acid chain. While start codons need nearby sequences or initiation factors to start translation, a stop codon alone is sufficient to initiate termination.
A stop Codon is the last sequence of base pairs (A,T,C,G) that tells when a new protein and amino acid are formed.
What would be the dna base triplet of uug
The answer would be TTC.
If it’s RNA you would replace the “t” to a “u”
If it’s DNA than it would be “T”
And g and c
The answer would be ttc
Which trait is common to both science and pseudoscience? Both offer an explanation.
Both are based on factis
Both are based on beliefs.
Both change with time.
The trait that is common to both science and pseudoscience is both are based on facts.
- Both science and pseudoscience are based upon collection of evidence, information and facts.
- Although both claims to have the evidence to back up their research and findings but only science provides a solid one. The pseudoscience supports their findings with little evidence.
- We can see a clear and straight forward explanation in science but pseudoscience gives a vague and disturbing explanations, though both back them up with the facts and evidence.
B: Both are based on facts
Took the test, and looked it up
What would happen if oygen were not available - from the chemistry of cellular respiration
If oxygen is no longer available, it would be considered ANAEROBIC RESP. anaerobic respiration, also known as fermentation is one of the two types of cellular respiration. however, when you’re comparing anaerobic respiration to aerobic respiration (aerobic requires oxygen), anaerobic respiration only produces 2 ATP while aerobic produces around 36 ATP.
What is the reason for seasons
Because of climate change
Polypeptide chain of
Which of the following is true regarding the process shown above?
A. The process shown above is known as cloning and involves the production of RNA from protein molecules
B. The process shown above is known as replication and involves the production of DNA from RNA.
The process shown above is known as translation and involves the production of proteins from RNA.
The process shown above is known as transcription and involves the production of proteins from DNA.
The process shown above is known as translation and involves the production of proteins from RNA.
What is polypeptide?
Biopolymers are substances created by living things. Biopolymers can be divided into four main categories: polysaccharides, polypeptides, polynucleotides, and fatty acids.
An unbranched chain of amino acids joined together by peptide bonds is referred to as a polypeptide. A peptide bond creates an amide by joining the carboxyl group of one amino acid to the amine group of the following amino acid.
It is possible to give names to short polypeptides based on how many monomeric amino acids make them up. For instance, a peptide called a dipeptide is made up of two amino acid subunits, a peptide called a tripeptide is made up of three amino acid subunits, and a peptide called a tetrapeptide is made up of four amino acid subunits.
Therefore, The process shown above is known as translation and involves the production of proteins from RNA.
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C. The process shown above is known as translation and involved the production of proteins from RNA.
you are a molecule of carbon. choose a starting point in the carbon cycle and describe the process you would go through to move through the entire cycle
The carbon cycle is a natural way to recycle carbon in the environment. It usually starts with the atmosphere and ends by getting released into the atmosphere itself.
What are the steps of carbon cycle?
The carbon released into the atmosphere through either respiration, combustion of fossil fuels, vehicles, etc.
The main steps involved in carbon cycle are:
- Carbon moves to plants through atmosphere.
- From plants it goes to animals.
- When plants and animals die, the carbon is then released to the soil.
- Carbon also released from the fossil fuels on burning.
- It also comes from oceans to the atmosphere.
Thus, it can be concluded that the molecule of carbon starts from atmosphere and ends by being released to the atmosphere.
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What is DNA replication?
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 basis for biological inheritance.
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 basis for biological inheritance