bacteria are growing exponentially in an environment of unlimited space and food. the doubling time is 1 hour. if there are initially milligrams of bacteria, express the mass of the bacteria as a function of time .

Answer:

Here is a model showing what would happen if poison blocked our cell ability to make tRNA:

[Image of a cell with a large red X over the tRNA]

tRNA is a type of RNA that is involved in protein synthesis. It helps to carry amino acids to the ribosome, where they are assembled into proteins. If poison blocked our cell ability to make tRNA, it would prevent us from making proteins. This would lead to a variety of health problems, including:

* Muscle weakness

* Weight loss

* Fatigue

* Hair loss

* Skin problems

* Infections

* Death

In severe cases, blocking tRNA production can be fatal.

Here is a more detailed explanation of how tRNA works:

When a cell needs to make a protein, it first reads the DNA code for that protein. This code is transcribed into messenger RNA (mRNA). The mRNA is then translated into a protein by the ribosome.

The ribosome reads the mRNA codon by codon. Each codon is a sequence of three nucleotides that codes for an amino acid. The ribosome uses tRNA to bring the correct amino acid to the ribosome for each codon.

The tRNA molecule has an anticodon that matches the codon on the mRNA. The anticodon is a sequence of three nucleotides that is complementary to the codon on the mRNA.

The tRNA molecule binds to the ribosome at the codon that it matches. The amino acid that is attached to the tRNA is then added to the growing protein chain.

This process continues until all of the codons on the mRNA have been translated. The ribosome then releases the protein chain.

If poison blocked our cell ability to make tRNA, it would prevent the ribosome from getting the correct amino acids for each codon. This would result in the production of faulty proteins. These faulty proteins could damage the cell or even kill it.

Answer:

Cork formation is a type of secondary growth that occurs in the stems and roots of woody plants. Gum formation, on the other hand, is a type of defense mechanism that occurs in response to injury or infection.

Explanation:

Answer:

Explanation:

Geological substratum refers to the solid rock or layer of Earth's crust that lies beneath the soil, sediment, or other surface materials.

Hope it helps!!

Populations in Hardy-Weinberg equilibrium express the same allelic and genotypic frequencies through generations. Number of individuals expressing each phenotype: 63 sheep S^AS^A, 84 sheep S^AS^B, 28 sheep S^BS^B.

The Hardy-Weinberg equilibrium theory states that allelic and genotypic frequencies in populations that is in equilibrium remain the same through generations. No evolutive forces are acting on these populations, so no evolution occurs.

Assuming a diallelic gene,

Allelic frequencies

Genotypic frequencies

The addition of the allelic frequencies equals 1

p + q = 1.

The sum of genotypic frequencies equals 1

p² + 2pq + q² = 1

In the exposed example,

Alleles          Frequencies

Genotypes

We need to get the number of animals expressing each genotype and phenotype. To do it, we just need to use allelic frequencies and calculate  genotypic frequencies (p², 2pq, and q²), and then multiply these values by the total number of animals (N = 175).

Genotypic and Phenotypic frequencies

F(S^AS^A) = p² = 0.6² = 0.36

F(S^AS^B) = 2pq = 2 x 0.6 x 0.4 = 0.48

F(S^BS^B) = q² = 0.4² = 0.16

Number of individuals expressing each phenotype

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Complete question

A single gene with two alleles control variation in haemoglobin type in sheep. There are three different phenotypes corresponding to genotypes

In a flock of 175 sheep the frequency of allele S^A was found to be 0.6 and frequency of allele S^B WAS found to be 0.4.

Using the hardy weinberg equation calculate the number of sheep with each phenotypes in the flock show your working

Cell theory development has its roots in the development of the microscope and the techonology it needed, such as high powered lenses (OPTION B). This technological advance allowed people at that time, to realize how tiny, microscopic structures assemble tissues of living organisms. Which later one, would receive the name of "cells".

Genetic recombination and independent assortment are considered random sources of genetic variation, while mutations can occur randomly or due to specific factors.

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Unlike the other three kingdoms within the domain Eukarya (Animalia, Plantae, and Fungi), evidence indicates that protists do not share the same evolutionary lineage. As a result, five new taxonomic groupings called "Protist Supergroups" have been developed to explain evolutionary relationships among protists.

These supergroups include Excavata: A diverse group of protists that includes some of the earliest eukaryotic lineages, such as parasitic species and free-living flagellates.

Rhizaria: A group of mostly single-celled organisms that are characterized by a complex cytoskeleton and the ability to form pseudopods. SAR (Stramenopiles, Alveolates, and Rhizaria): A group of diverse protists that includes diatoms, brown algae, and some parasites.

Opisthokonts: A group of protists that includes fungi and animals, and is defined by the presence of flagella and/or undulating membranes. Amoebozoa: A group of amoeba-like protists that are characterized by their ability to form pseudopods.

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The image is a food energy pyramid, three autotrophs may be trees, grasses, and algae and one primary consumer is an herbivore while a secondary consumer is a carnivore animal that eats herbivores.

A food energy pyramid is a type of representation that indicates the relationships between trophic levels and the flow of energy between organisms in a given ecosystem.

Therefore, with this data, we can see that a food energy pyramid is a representation of the type of association between species and organisms in an ecosystem.

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The student's hypothesis is incorrect; compacted-soil flood control barriers lasted longer than I-wall barriers in the investigation.

Based on the data collected in the student's investigation, the evaluation of the hypothesis shows it to be incorrect.

The student initially hypothesized that I-wall style flood control barriers would last longer than compacted-soil barriers.

However, the results showed that I-wall barriers broke after an average of 8 liters of water were added, while compacted-soil barriers withstood an average of 15 liters.

This indicates that compacted-soil flood control barriers are more effective in lasting longer under the tested conditions compared to I-wall style barriers.

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Answer:

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1-Water is passively transported into the roots and then into the xylem. 2-The forces of cohesion and adhesion cause the water molecules to form a column in the xylem. 3- Water moves from the xylem into the mesophyll cells, evaporates from their surfaces and leaves the plant by diffusion through the stomata.

Answer:

Glucose present as monomers within the cell will exert more osmotic pressure than a single glycogen molecule, resulting in endosmosis and the lysing of cells.

Also, the presence of free glucose molecules will result in increase in weight of the liver due to lack of efficient packing as in glycogen as well as the association ofnthe glucose molecules with water molecules.

Explanation:

Glycogen is a polysaccharide composed of glucose monomer units linked to Each other by α-1,4-glycosidic binds. α-1,6-branches arises at about every 10th glucose residue in the straight chain. Thus animals more glucose molecules to be stored within a much smaller space, thereby incresing the bulkiness of glycogen. Glycogen molecules are insoluble in the aqueous medium of the cell because it doesn't have enough free polar groups to participate in hydrogen bonding with water and are stored as granules and therefore do not affect the water potential or osmotic balance of the cell.

On the other hand, glucose molecules are highly soluble in water because it has many free polar -OH grours that form hydrogen bonds with water. If the glucosyl residues in large numbers of glycogen molecules were replaced with an equivalent number of molecules of free glucose, the free glucose will exert a high osmotic pressure inside the cell, causing the entry of water in the cell by endosmosis resulting in swelling and lysis ofnthe cell. Also, the space occupied by these free glucose units within the cell will be much larger than that of glycogen whichmenables efficient packing ofthe glucose molecules.

the frequency of the heterozygote (Bb) in the population is approximately 0.4431, or 44.31%. To determine the frequency of the heterozygote, we first need to determine the frequency of the blue-eyed homozygote and the brown-eyed homozygote.

Given that 25% of the individuals have blue eyes, we can infer that the frequency of the blue-eyed homozygote (bb) is 0.25, or 25% (since blue is recessive). Therefore, the frequency of the brown-eyed homozygote (BB) can be calculated as 1 - 0.25 = 0.75, or 75%.

Now, let's denote the frequency of the heterozygote (Bb) as p. Since there are only two alleles in the population (B and b), the sum of the frequencies of all genotypes must equal 1.

The frequency of the heterozygote can be calculated using the equation:

2pq + p^2 + q^2 = 1,

where p represents the frequency of allele B, and q represents the frequency of allele b.

Since brown eyes are dominant, the frequency of the brown allele (p) can be calculated as the square root of the frequency of the brown-eyed homozygote (BB), which is 2*0.75*0.25

Therefore, the frequency of the heterozygote (Bb) can be calculated as:

2(0.866)(0.134) + (0.866)^2 + (0.134)^2 ≈ 0.4431.

Rounding this value to four decimal points, we get a frequency of approximately 0.4431 for the heterozygote.

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Answer:

The xylem transports water and minerals from the roots up the plant stem and into the leaves. In a mature flowering plant or tree, most of the cells that make up the xylem are specialised cells called vessels. Vessels: Lose their end walls so the xylem forms a continuous, hollow tube.

Explanation:

Answer:

During cellular respiration, glucose is broken down in the presence of oxygen to produce carbon dioxide and water. The energy released during the reaction is captured by the energy-carrying molecule ATP (adenosine triphosphate).

So the answer is Stored chemical energy is broken down and released in the mitochondria.

Explanation:

In cellular respiration, stored chemical energy is broken down and released in the mitochondria. The correct option is B.

Mitochondria are the membrane-bound organelles that create the maximum of the chemical energy necessary to power the biochemical reactions of the cell.

The mitochondrial energy is stored in a small molecule referred to as adenosine triphosphate (ATP).

Cellular respiration is the way by which organic fuels are oxidized in the presence of an inorganic electron acceptor, encompassing one as oxygen, to give enormous amounts of energy and pressure the majority production of ATP.

Cellular breathing is the way by which cells in plants as well as animals break down glucose and convert it into power, which is then used to perform work.

The goal of cellular respiration is simple: to provide the energy that cells require to function.

Thus, the correct option is B.

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Answer:

false

Explanation:

A selectively permeable membrane prevents some compounds from passing through it. So, the given statement is True.

A form of biological membrane known as a selectively permeable membrane is one that restricts the passage of some molecules or ions while allowing others to pass through it via active or passive transport. By regulating the flow of chemicals into and out of the cell, this feature enables the cell to maintain a stable internal environment.

The plasma membrane as well as organelle membranes are two instances of permeable but selective membranes in cells. Semipermeable membranes are a type of polymeric, biological or artificial membrane that permits some molecules or ions to pass through them via osmosis.

Therefore, the given statement is True.

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Mangroves are coastal ecosystems that provide habitats, food, and protection for various species, supporting the food web.

The mangrove ecosystem is a unique and highly productive coastal habitat characterized by mangrove trees, which are specially adapted to survive in saline environments. Mangroves are typically found in tropical and subtropical regions along sheltered coastlines, estuaries, and intertidal zones.

Mangroves are vital in sustaining the ecosystem by providing various ecological services. One of their significant contributions is their role in the food web or food chain.

They serve as a critical nursery and feeding ground for a diverse range of marine species. The intricate network of roots, known as prop roots, provides habitat, protection, and feeding opportunities for numerous organisms, such as fish, crustaceans, mollusks, and birds.

The mangrove leaves and detritus that fall into the water serve as a source of organic matter and nutrients, fueling the base of the food web. Decomposers and detritivores break down the organic matter, which is then consumed by various organisms.

Small organisms, like zooplankton and small fish, feed on the decomposers and detritivores, becoming prey for larger predators such as fish, birds, and reptiles.

Furthermore, mangroves act as a buffer against coastal erosion and storm surges, protecting shorelines and adjacent habitats. They also contribute to water filtration, nutrient cycling, and carbon sequestration, and provide a habitat for numerous endangered and migratory species.

In summary, the mangrove ecosystem plays a crucial role in sustaining the food web or food chain by providing habitat, nursery areas, and food sources for a diverse array of organisms. Their presence supports the productivity and biodiversity of coastal ecosystems, making them an essential component of coastal environments worldwide.

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Answer:

If all the grass disappeared from a community, the most likely change to occur would be that the deer population would decrease. This is represented by option D. Deer are herbivores and rely on grass and other vegetation as a primary food source. Without grass, the deer would have less food available, which could lead to a decrease in their population. This could also have a cascading effect on other species in the community, such as predators that rely on deer as a food source.

Explanation:

Answer:

I'm pretty sure it's scientist! :)

The three main characteristics of angiosperms are flowers, fruit, and seeds.

Firstly, flowers are reproductive structures unique to angiosperms. They serve as the site for pollination, where pollen grains are transferred from the male reproductive organs (anthers) to the female reproductive organs (stigma). This process leads to fertilization and the development of seeds.

Secondly, angiosperms produce fruit, which is formed from the ovary of the flower after fertilization. Fruits serve as protective structures for the developing seeds and aid in seed dispersal by various means, such as wind, water, animals, or self-dispersal mechanisms.

Lastly, angiosperms produce seeds as part of their reproductive cycle. Seeds contain the embryonic plant, stored nutrients, and a protective seed coat. This adaptation allows for the survival and dispersal of offspring to new locations.

Angiosperms are a diverse group of plants and can be further classified into monocots and dicots based on the number of cotyledons (embryonic seed leaves). Monocots have a single cotyledon, while dicots have two cotyledons.

In summary, the three main characteristics of angiosperms are flowers for reproduction, fruit for seed protection and dispersal, and seeds for embryonic development and propagation.

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Scientists have to draw a conclusion by identifying and reporting only the data that support the investigation's hypothesis.

A scientist will follow the scientific method described in the steps below when conducting scientific research in order to conduct the study:

A scientist may be able to draw a conclusion based on the data he or she has gathered and interpreted. The conclusion of the investigation must be supported by the evidence that has been gathered during the investigation, such as data and observations. A conclusion may explain the causes and effects of the events that occurred during the course of the investigation by explaining what caused them.

Hope this helps :)

Answer:

D. By thinking critically and logically about possible explanations for

the data.

Explanation:

It was not B. :(

Answer: Yes

Explanation: Monocots produce one cotyledon, while dicots produce two. Because seeds are reproductive structures and thus important to a species' survival, plants have evolved many mechanisms to ensure their survival. One such mechanism is seed dormancy. Dormancy comes in two forms: seed coat dormancy and embryo dormancy

Answer:Plants that reproduce by seeds. Seed plants have special structures on them where male and female cells join together through a process called fertilisation. After fertilisation, a tiny plant called an embryo is formed inside a seed.

Answer:

Carbon compounds are chemical substances that contain carbon atoms bonded to any other element.

Explanation:

Answer:

Carbon compounds: Chemical substances that contain carbon.

Let's first define what carrying capacity is:

Carrying capacity is the maximum amount of organisms an ecosystem can carry. It is related to our logistical growth formula:

Where K is our carrying capacity.

Carrying capacity is affected by a couple of things:

0. Resource availability,: depending on how many resources there are in an ecosystem, it can only hold so many organisms.

1. Space,: depending on how ,large, an ecosystem is, the denser the ecosystem (of organisms), the harder it is for the organisms to coexist. Therefore, the smaller the area, the lesser the carrying capacity.

These 2 factors (resources being biotic and space being abiotic) are the only factors few factors that affect carrying capacity.

Therefore, our best answer choice is A.

Epigenetics represents the intersection between environment (what we eat) and genetic factors.

Epigenetics is a subdiscipline of genetics that studies how gene expression patterns may change according to different environmental inputs.

Epigenetic mechanisms include DNA methylation, histone modifications and non-coding RNAs pathways.

In conclusion, Epigenetics is the intersection between environment and genetics.

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Answer:

1 pilus

2plasmid

3 ribosomes

4 cell wall

Answer:

1. Yes, I think human population is a concern because of the strain it will put on farmers and food workers to produce an adequate amount of food for the extra population. Also, there is alreadfy low livable space in every country, the standard of living will go down in The United States if there is a larger population, earth is already overpopulated.

Explanation:

Im not sure if this is what you specifically need, but this is just my response to the question, "Do you think human population growth is a concern in the United States?"