Which of the following is not a characteristic of Arthropods that has attributed to their diversity and success?
A. Jointed appendages
B. Segmentation
C. Highly developed nervous system
D. Endoskeleton
a dihybrid cross between 2 heterozygous parents produces a phenotypic ratio of?
A dihybrid cross between two heterozygous parents produces a phenotypic ratio of 9:3:3:1, which reflects the independent assortment of genes and dominance of certain traits.
Explanation:A dihybrid cross between two heterozygous parents (e.g., GgYy x GgYy) involves two genes and produces offspring with a combination of traits that follow a phenotypic ratio of 9:3:3:1. This means that in the context of pea plants with two traits such as seed shape and color, 9/16 of the plants would exhibit both dominant traits (round, yellow seeds), 3/16 would exhibit one dominant and one recessive trait (round, green seeds or wrinkled, yellow seeds), and 1/16 would exhibit both recessive traits (wrinkled, green seeds). These proportions can be visualized using a Punnett square and result from the principles of independent assortment and dominance in genetics.
The hotter the star, the more light it gives off, the cooler the star the less light it gives off. Stars that follow this pattern are __________.
neutron stars
black holes
giants
main sequence stars
Answer:
Option D, main sequence stars
Explanation:
Main sequence star are those in which hydrogen fuses to form helium atom. The life of a sequence star depends on the mass it possess. A star which has high mass has higher internal material within them which burns fast to produce light and heat. The higher the mass, the higher is the luminosity (more light is produced).
Hence, the correct answer is option D main Sequence Star.
what happens when a magnesium atom loses an electron in its outer energy shell? A. it has an increase in number of neutrons. B. it becomes a negative ion. C. it has an increase in the number of protons. D. it becomes a positive ion.
When a magnesium atom loses an electron from its outer energy shell, it becomes a positive ion. The correct option is D
What is electron ?An electron is a subatomic particle that carries a negative electric charge. It is one of the fundamental particles that make up atoms, along with protons and neutrons.
This is because magnesium has 12 electrons, with 2 in its innermost shell and 8 in its second shell. The outermost shell contains 2 electrons, so when one electron is removed, the atom now has 11 electrons and a net positive charge of +1.
Therefore, the correct answer is D
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Amoebas are unicellular organisms, while human beings are multi-cellular and the most intelligent of organisms. However, both are classified as eukaryotes. How will you justify this reasoning?
Explain why and how theories may be changed or replaced over time.
Answer:
The theories may get modified with time as new information or new technologies get discovered or get developed. New developments result in the modifications in the methods of experiments that offer information, which may or may not encourage the prevailing theory. If the theory is still supported, it may be updated, however, if it is not even if the results are relevant and true, the theory may get substituted.
What observation led researchers to purpose that chloroplasts evolved from Cyanobacteria
The energy needed for body's internal activities when at rest is your Active Metabolic Rate.
True
False
Select the most appropriate statement with respect to cellular respiration in humans
A scientific model can be used to _______. a. replace study of the actual system b. better understand systems and processes c. complicate ideas d. all of the above
The respiratory system works with the ______ system to add oxygen to the blood and remove carbon dioxide from the body. what is it ? circulatory,muscular,digestive, or nervous ?
Answer;
-Circulatory system
The respiratory system works with the circulatory system to add oxygen to the blood and remove carbon dioxide from the body.
Explanation;
-The circulatory system is the body's transport system. It is made up of a group of organs that transport blood throughout the body. The heart pumps the blood and the arteries and veins transport it. Oxygen-rich blood leaves the left side of the heart and enters the biggest artery, called the aorta.
-The circulatory and respiratory systems work together to provide body cells with oxygen which is essential for cellular respiration. This process involves the breaking down of glucose so that energy is released in a form that cells can then use. During cellular respiration, carbon dioxide is produced as a waste product. The carbon dioxide then needs to be removed from the cells or it would cause damage or death to them.
What are the structures of the lymphatic system?
bone marrow and thymus
A Punnett square has letters at top and left sides of the grid. What cellular process is represented by these letters?
Final answer:
The letters on a Punnett square represent alleles from each parent's gametes produced through meiosis, and are used to predict offspring genotypes.
Explanation:
The letters at the top and left sides of the Punnett square represent the alleles of the gametes produced by each parent during the cellular process of meiosis. This process ensures the separation of homologous chromosomes into different gametes. In a typical monohybrid cross, the Punnett square has four squares, and if both parents are heterozygous (e.g., Aa), the Punnett square would illustrate the outcomes of AA, Aa, aA, and aa. For each parent, half the gametes will carry the dominant allele (A) and half will carry the recessive allele (a). The squares within the grid represent the potential genotypes of offspring, with the resulting ratios being 25% AA, 50% Aa, and 25% aa for the genotypes, which aligns with Mendel's law of segregation.
The letters in a Punnett square signify the genetic recombination and allele combinations that occur during meiosis, specifically illustrating the potential outcomes of offspring resulting from the fusion of gametes during fertilization.
The letters positioned at the top and left sides of a Punnett square grid represent the cellular process of genetic recombination and the subsequent formation of gametes during meiosis. In meiosis, a specialized type of cell division that occurs in sexually reproducing organisms, the genetic material is shuffled and exchanged between homologous chromosomes.
The top row and left column of a Punnett square typically display the alleles carried by each parent. These letters represent different versions of a gene, known as alleles, and their various combinations illustrate the potential genetic outcomes of the offspring. The crossing over and random assortment of alleles during meiosis contribute to genetic diversity among the gametes, ensuring that each individual produced inherits a unique combination of genetic material from their parents.
As the cells undergo meiosis, genetic recombination leads to the formation of gametes, such as sperm and egg cells, each carrying a distinctive set of alleles. The Punnett square provides a visual representation of the possible combinations of alleles that can result from the union of these gametes during fertilization.
The question probable may be
Which cellular process is depicted by the letters positioned at the top and left sides of a Punnett square grid?
Which of the following must occur for speciation to happen?
geographic isolation
reproductive isolation
temporal isolation
behavioral isolation
Reproductive isolation is necessary for speciation. It is a process by which new species of plants and animals are created.
Further Explanation:
Speciation is a technique used to create new kinds of plants and animals. It occurs when a group of species differ from other species and develop their new characteristics. They differ from their ancestors based on the environment they live in and characteristics.
The speciation is performed in five forms: allopathic, peripatric, sympatric and artificial. Allopatric speciation occurs when two different groups of species are formed from the single species. These two species are isolated from each other. Peripatric speciation occurs when an individual species break off from a large group and form a new species. Sympatric speciation occurs when a species cover a large geographical area. Artificial speciation is the creation of new species by a human.
Learn More-
Learn more about a haploid cell during meiosis https://brainly.com/question/94813 Learn more about how are mitosis and binary fission similar https://brainly.com/question/6462270 Learn more about a dividing eukaryotic cell that is treated with a drug that inhibits the shortening of spindle microtubules. This will cause the cell division cycle to stop at the ____ stage. https://brainly.com/question/10767798
Answer Details:
Grade: High school
Subject: Biology
Chapter: Evolution.
Keywords:
Reproduction, isolation, speciation, species, ancestors, characteristics, allopathic, peripatric, sympatric, articial, geographical, plants and animal.
For speciation to happen, reproductive isolation must occur.
What is speciation?Reproductive isolation is a mechanism that prevents individuals from different populations or species from interbreeding successfully or producing viable offspring. It can occur through different processes, including geographic isolation, temporal isolation, behavioral isolation, or a combination of these factors.
Geographic isolation occurs when populations are physically separated by a geographic barrier, such as a mountain range or a body of water. Over time, genetic differences can accumulate in each population, leading to reproductive isolation.
Temporal isolation occurs when populations reproduce at different times of the day, season, or year, which can prevent successful mating and reproduction.
Behavioral isolation occurs when differences in behavior or courtship rituals between populations prevent interbreeding.
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what base in mRNA can only join with the adenine base of RNA? uracil base of tRNA
How do the number of chromosomes in a female scorpion's egg cells compare with the number in her body (somatic) cells?
Question 12 options:
The number of chromosomes depends on the size of the scorpion.
There are half as many chromosomes in egg cells.
There are twice as many chromosomes in egg cells.
The number of chromosomes is the same in both.
The number of chromosomes in a female scorpion's egg cells is half as many chromosomes as compared with the number of chromosomes in her body (somatic cells). Thus, the correct option is B.
What are Chromosomes?Chromosomes are the units of DNA which contain the hereditary information of an organism. Chromosomes contain genes which are responsible for the development of different characters in an organism.
An organism is formed by fertilization of gametes in the sexual reproduction. The zygote formed is diploid in nature, so to maintain the chromosomal count constant in the zygote, the gametes need to be haploid in nature.
Two haploid gametes fuse to form a diploid zygote cell which leads to the formation of a diploid organism. In this organism, all the somatic cells are diploid in nature which undergo mitosis to divide the cells.
Therefore, the correct option is B.
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Which of the following describes a population that is distributed evenly across an area A.random B.uniform c.clumped d.crowded
The phrase “opposites attract” can be seen very clearly in A Covalent bonds B Ionic bonds C Electron bonds D Proton bonds...
The right option is; A. covalent bonds
The phrase “opposites attract” can be seen very clearly in covalent bonds.
A covalent bond is a molecular bond that occurs when pairs of electrons are shared between atoms. The bond is caused by the electrostatic attraction of their nuclei for the same electrons. When electrons are shared, it makes each atom to fill up their outer electron shell and gain stability. When two atoms of the same element share electrons through covalent bonding, the electrons are shared equally between the atoms, but if it is shared between atoms of different elements, the electron will be drawn (attracted) more toward the atom that has the higher electronegativity which will cause a polar covalent bond.
Answer:
Ionic bonds
Explanation:
I answered with Covalent bonds and was wrong and checked and it was Ionic bonds.
Organisms don't need a mate in reproduction. is it asexual or sexual
When organisms do not need a mate in reproduction, it is asexual
Asexual reproduction is a type of reproduction in which a single organism produces offspring that are genetically identical to the parent. This type of reproduction involves only one parent and there is no change in the number of chromosomes. Asexual reproduction occurs in unicellular organisms such as archaea and bacteria. Types of asexual reproduction include; budding, sporogenesis, binary fission, and vegetative propagation.
The reaction involved in cellular respiration is similar to that involved in the burning of fossil fuels. What must be an essential component of fossil fuels?
A) oxygen
B) water
C) carbon
D) carbon dioxide
The correct answer is option C
The reaction of cellular respiration and burning of fossil fuel needs carbon. Fossil fuel are like coal is made up of carbon. Organic compounds are made up of carbon(abundant), hydrogen and oxygen in small amounts.
The cellular respiration is the process by which the body obtains energy in the form of ATP by the breakdown of carbohydrates which is also a carbon compound.
Answer:
The correct answer is option C, Carbon
Explanation:
In cellular respiration, a higher carbon molecule i.e glucose breaks down in the presence of oxygen to produce carbon dioxide, water and energy. The chemical equation for cellular respiration is given below –
C 6 H 12 O 6 + 6 O 2 --> 6 CO 2 + 6 H 2 O + ATP
Like wise, in combustion of any fuel , the higher carbon molecules burn in the presence of oxygen to release gases like carbon dioxide methane etc.
Thus, a fossil fuel must be made up of carbon.
Which of the following could be a physical hazard? a. Shigella bacteria b. Plastic packaging c. All-purpose cleaner d. Mold
Being nocturnal is an adaptation that plants and animals use to deal with water scarcity and dry climate. Which biome is likely to have the maximum number of nocturnal animals?
A.Grassland
B.Rain Forest
C.Coniferous Forest
D.Desert
What is the different between cdc and cdk in cell cycle control??? ...?
Answer:
Cdc stands for cell division cycle and cdk is cyclin dependent kinase.
Explanation:
Cdc and cdks are involves the process of cell cycle. The cdk are the enzymes that attaches phosphate group to different molecules. The phosphorylation process allows the cell to move to next stage in the cell cycle.
The Cdc protein allows the removal of residues that are attached to inhibitory phosphate. This cdc protein control cell cycle progression. This allows the cell to move through cell cycle stages that includes S phase and mitosis.
What do all wetlands have in common?
A. They lack life-forms.
B. They are highly polluted.
C. They are swamps.
D. They recycle nutrients into the soil.
The answer is D. they recycle nutrients into the soil
The correct answer is option D. They recycle nutrients into the soil.
The wetlands are the water the land water bodies, which are supplied with the water seasonally or throughout the year. All the type of the wetlands can support growth of the life forms, which can be seasonal or annual. Some o the wetlands are polluted by human activities, but not all of them. Swamps are a type of wetlands.
All the wetlands are involved in the recycling of the nutrients back into the soil. A wetland system have a rich diversity of flora and fauna, which can help in filtration of various sediments from water, recycling or removing nutrients and pollutants. In the wetlands, the water also come from the runoffs, the inorganic substances present in the water can be filtered and added to the sediments.
Select all that apply. Chromosomes _____.
1)are rod shaped structures that contain DNA
2)are located in the nucleus
3)occur in numbers that are the same for all members of a certain species
4)occur in numbers that are the same for all organisms
5)are organized into karyotypes for scientists to analyze
the answers are 1) 2) 3) and 5)
The priest in “First Confession” tells Jackie he should follow his sister Nora’s good example.
true
false ...?
Answer:
false
Explanation:
The main source of energy for reactions that occur in all living organisms is _____.
A. adenine
B. ADP
C. ATP
D. phosphate
ATP is the answer....
how do bone cells adapt to their job ...?
If a tRNA molecule has an anticodon which reads AUG, what will it match up with and what amino acid is it carrying?
A. It is carrying arginine and will match with a CGU codon on the mRNA.
B. It is carrying methionine and will match with a TAC codon on the DNA.
C. It is carrying methionine and will match with a UAC codon on the mRNA.
D. It is carrying tyrosine and will match with a UAC codon on the mRNA
Is it A? ...?
no, it's not a. it's d) It is carrying tyrosine and will match with a UAC codon on the mRNA
if the tRNA is AUG, then the mRNA would be UAC.
U goes with A
A goes with U
T goes with A
G goes with C
C goes with G
to find out how which amino acid is it you can use the chart below, which should be tyrosine. :)
Proteins are made from amino acids. An amino acid has three parts that are joined to a central carbon atom. Identify the three parts that create an amino acid.