Transports water and sugars in a plant
a.) non-vascular tissue
b.) vascular tissue

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.

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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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.

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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.

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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The answer is ''interactions between the hydrosphere and atmosphere during a storm''.

Hope this helps...

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 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.

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.

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.

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.

A newborn breathes four times as often as an adult, air sacs at the end of bronchioles are called alveoli, the epiglottis protects the larynx from ingested materials, and blood leaving the lungs is oxygenated.

The respiratory system of humans is a complex arrangement of structures that allows us to breathe in oxygen and expel carbon dioxide. The journey of air begins at the nasal cavity, passes through the pharynx, and progresses into the larynx. The trachea, or windpipe, is next in the path, followed by division into right and left primary bronchi that lead into each lung. These bronchi branch out into smaller bronchioles which then terminate in clusters of air sacs called alveoli, the site of gas exchange with the capillaries in the lungs. Inhalation causes the diaphragm to contract, enlarging the chest cavity and drawing in air, whereas exhalation is due to diaphragm relaxation, pushing air out of the lungs.

Answering the student's questions:

A newborn breathes about four times as often as an adult. This high respiratory rate is necessary to support their rapid metabolism and growth demands.

The cluster of air sacs at the end of each bronchiole is called the alveoli. These structures are vital for the exchange of oxygen and carbon dioxide between the lungs and the blood.

The flap of elastic cartilage that protects food from entering the larynx when swallowing is called the epiglottis.

When blood leaves the lungs, it is oxygenated, meaning that it has a high concentration of oxygen and a low concentration of carbon dioxide after gas exchange has occurred in the alveoli.

  ATP            is the answer....

Migration describes seasonal movement of individuals into and out of a population. So, the correct options for 6, 7, 8 and 9 are D, D, B and A respectively.

A population is a collection of people belonging to the same species who coexist in the same location. A population's size is determined by how many people there are in it.

Different levels of population organisation, from a single person living in a small community to an entire species dispersed over the world, can be examined. The features of a population, such as its age, sex, or genetic make-up, can also be used to characterise it.

Migration is the name given to the seasonal influx and exodus of people from a population. Population increase can be expressed as (Immigration + births) - (Emigration + deaths). The "Logistics limit" of a specific environment refers to the greatest population size that it can support. A population is said to be growing exponentially if it grows by 5% annually.

Therefore, the correct options for 6, 7, 8 and 9 are D, D, B and A respectively.

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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?

Final answer:

When you walk your dog, you are using energy from the sunlight to power this activity. This energy comes from plants that have converted sunlight into chemical energy through photosynthesis.

Explanation:

When you walk your dog, you are using energy from the sunlight to power this activity. This is because sunlight is converted into chemical energy by plants through a process called photosynthesis. The chemical energy is then transferred to animals when they eat plants or other animals that have eaten plants. When you walk your dog, you are using the energy that originated from the sunlight and passed through the food chain.

for e2020, The answer is A:

increased variation in tail feather color because the selection pressure has been relieved

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-RxL

bone marrow and thymus

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. :)

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.

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.