A male or female sex cell is called a gamete. Gametes are produced through a specialized cell division process called meiosis.
Gametes are reproductive cells that carry half the number of chromosomes of a normal cell. In sexual reproduction, two gametes, one from each parent, fuse together during fertilization to form a zygote, which develops into a new individual. Gametes are produced through a specialized cell division process called meiosis, which reduces the chromosome number by half to ensure the offspring receives the correct number of chromosomes.
In humans, the male gamete is called sperm, produced in the testes, while the female gamete is called an egg or ovum, produced in the ovaries. Gametes are specialized cells designed for sexual reproduction and carry genetic information from the parents. They are essential for the continuation of the species and the genetic diversity of offspring.
The fusion of male and female gametes during fertilization restores the full complement of chromosomes and creates a unique combination of genetic material in the offspring. This process ensures genetic variation within a species, allowing for adaptation to changing environments and promoting evolution.
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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.
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.
A student designed an experiment to demonstrate the interaction between Earth systems. The steps of the experiment are given below.
1. Pour water on a baking dish.
2. Use a fan to blow air over the water.
3. Watch the formation of waves on the water surface.
The student’s experiment demonstrates the:
interactions between the hydrosphere and atmosphere during a storm
interactions between the hydrosphere and geosphere during hurricanes
interactions between the geosphere and atmosphere during tornadoes
interactions between the hydrosphere and cryosphere during a cyclone ...?
The answer is ''interactions between the hydrosphere and atmosphere during a storm''.
Hope this helps...
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
Which of these organisms has an endoskeleton?
A.) Beetle
B.) Crab
C.) Elephant
D.) Tree
An example of natural selection is the tail of a male peacock. The females of the species choose mates based on the colors of the males’ tail feathers. If females begin using different criteria than feather color when they choose mates, what would most likely happen to the tails of peacocks over time?
for e2020, The answer is A:
increased variation in tail feather color because the selection pressure has been relieved
Good luck!
-RxL
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....
Which of the following could be a physical hazard? a. Shigella bacteria b. Plastic packaging c. All-purpose cleaner d. Mold
Which set of steps shows how information is transformed to synthesize proteins?
A. gene -> chromosome -> protein
B. DNA -> RNA -> protein
C. cell respiration -> ATP -> protein
D. ATP -> amino acid -> protein
Answer:
B
Explanation:
This step follows the Central Dogma of Molecular Biology, which describes the two-step process, transcription and translation, by which the information in genes are used to make proteins i.e. DNA → RNA → protein.
Deoxyribonuceic acid (DNA) is the stored form of genetic material in a cell. It contains all the genetic instructions needed for the optimal functioning of an organism. However, this information needs to be expressed. This process of expression is done by transcription and translation processes.
Transcription is the process of copying the information in the DNA molecule into a RNA molecule. It involves making a complementary strand of mRNA from a DNA template.
After the mRNA is synthesized, its nucleotide sequence is then used to synthesize proteins. This second process is called TRANSLATION. Translation occurs in the ribosome where building blocks (amino acids) are added in a chain-like manner based on the information on the mRNA to eventually lead to a polypeptide or protein.
what is the best definition of a eukaryotic cell?
Select the most appropriate statement with respect to cellular respiration in humans
What observation led researchers to purpose that chloroplasts evolved from Cyanobacteria
For a chemotherapeutic drug to be useful for treating cancer cells, which of the following is most desirable?
A) It is safe enough to limit all apoptosis
B) It does not alter metabolically active cells
C) It only attacks cells that are density dependent
D) It interferes with cells entering G0
E) It interferes with rapidly dividing cells ...?
A chemotherapeutic drug is most useful when it interferes with rapidly dividing cells, as this is a characteristic of cancer cells. Chemotherapy can cause side effects due to this mechanism affecting healthy cells too, hence combination therapies are used.
Explanation:For a chemotherapeutic drug to be useful for treating cancer cells, it is most desirable that it interferes with rapidly dividing cells (Option E). This is because cancer cells are characterized by their uncontrolled division. Chemotherapy drugs target these rapidly dividing cells to prevent their growth and spread. By interfering with key processes such as DNA duplication or mitotic spindle formation, these drugs can lead to the death of cancer cells. However, it is important to note that because these drugs also affect other rapidly dividing healthy cells in the body, they can cause side effects like hair loss and damage to the intestinal lining. Combination chemotherapy is often used to enhance therapeutic efficacy while trying to limit toxicity to healthy tissues.
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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a frog lays thousands of eggs because many eggs die this is a behavior is an example of
Answer:
Over production
Explanation:
Frogs are very carefree parents and thus unlike other adult species of animals who take care of their young ones for making them enable to survive, frogs do not look after their young ones and this is the reason that out of three to four thousands eggs produced at a time by female only 4 to 5 eggs survive till adulthood.
In order to make the cycle moving from one generation to other, frogs overproduce eggs so that at least a few of all survive till adult hood and reproduce further.
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.
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 are the structures of the lymphatic system?
bone marrow and thymus
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.
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. :)
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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Is Exothermic/Endothermic related to Product/Reactant Favored?
The energy needed for body's internal activities when at rest is your Active Metabolic Rate.
True
False
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
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?
how do bone cells adapt to their job ...?
Energy from the sun showers the Earth every day. Which are better at utilizing it: heterotrophs or autotrophs? Explain your answer.
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 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.
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?