Select the best answer for the question
20. A specific aphid is known to infest spinach, peppers, and tomatoes. How could a farmer use biological control to reduce aphids on these crops?
O A. Apply neem oil to the crops
O B. Introduce ladybugs to eat the aphids
O C. Introduce honeybees to pollinate the crops
D. Only plant crops that produce the Bt toxin

Answer:

A they want to get food in the flower

Answer: A) Sexual reproduction

Explanation:

Bacteria cannot reproduce sexually. They instead exchange genetic information.

Answer:

I-3, II-2, III-2 are all definitely carriers

It is possible find the genotype of individual II-1 because the he inherited his father's y which does not carry the trait (because only x chromosomes have the trait) and his mother's x chromosome, but the mother is not a carrier.

Answer:

The answer is B.

Explanation:

If you are looking for biggest to smallest this is the answer. Or, who eats who.

Answer:

A

Explanation:

Phytoplankton and algae form the bases of aquatic food webs. They are eaten by primary consumers like zooplankton, small fish, and crustaceans. Then fish get eaten by large predators, such as sharks, tuna, squid and octopus as well as marine mammals like seals and some whales form the top of the food chain. Next a shark is eaten by a whale. These whales have been known to attack and eat everything from small fish and turtles to squid, seals, sea lions, and even large whales. Killer whales also hunt, attack, and eat sharks. That is a food chain from smallest to biggest :)

Answer: Plantea

Explanation: Because plants have chloroplast.

Answer:

the answer is plantae

Explanation:

because it the one that has all the characteristics

As a result, its edge length is 2.13 cm (because copper has a density of 8.96 g/cm3 and a cube's volume is equal to a edge length cubed).

(Cubic volume equals (edge length)3, and copper density equals 8.96 g/cm3) Tip: Mass is equal to the product of volume and density.From of the question, we may deduce that copper has a density of 8.96 g/cm3 and a volume of 2.62 cm3 for the piece of copper.A cube's volume is equal to its length, breadth, and height. However, because it is a cube, the length, breadth, & height all are equal and correspond to one of the cube's edges. Therefore, just find a cube root of a volume to get the length of a cube's edge.

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In constructive interference, the energy of the combined wave is greater than the energy of each of the two waves.

A wave of greater, lower, or the same amplitude is created when two waves merge through interference by combining their displacements at all points in space and time. The interaction of waves that are coherent or correlated with one another, either because they originate from the same source or because their frequencies are similar or almost identical, leads to both constructive and destructive interference.

According to the principle of superposition of waves, the consequent amplitude at a place where two or more waves of the same kind are incident is equal to the vector sum of the amplitudes of the individual waves. Constructive interference occurs when the crests of two waves with the same frequency cross at the same location. In this case, the amplitude of each wave is equal to the sum of its individual amplitudes. Destructive interference occurs when the peak of one wave collides with the trough of another wave, resulting in an amplitude equal to the difference between the separate amplitudes.

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Based on the data in the graph, altering human activity in introduction of invasive species areas will most benefit plant species.

An introduced, nonnative organism (disease, parasite, plant, or animal) that starts to spread or widen its range away from the location of its initial introduction and has the potential to affect the environment, the economy, or human health is referred to as an invasive species.

Invasive species in the United States include Burmese pythons (Python bivittatus). Southeast Asia is the home of this enormous constrictor snake, which may reach lengths of more than 23 feet. However, it can currently be found in the Florida Everglades.

Invading animal habitats and resources all over the world, humans have basically turned into an invasive species. To make up for the ever-increasing population, people are moving into new areas and changing natural land.

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Bones and cerebrospinal fluid make up the layers that protect the brain and spinal cord. The brain is the body's primary processing organ. It either directly or indirectly controls how the body functions.

Along with the spinal cord, the brain is a component of the CNS. The brain is divided into three sections: the forebrain, the midbrain, and the hindbrain.

Bones: The skull and vertebral column bones form a hard protective shell around the brain and spinal cord.

The meninges are located directly beneath the skull and vertebral column bones. The meninges are three layers of connective tissue that surround and protect the brain and spinal cord.

Cerebrospinal fluid (CSF): Inside the brain and spinal cord is a watery cushion. The Blood Brain Barrier is a filtering barrier that protects neurons from toxins in the bloodstream.

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Answer:

a

Explanation:

Answer:

Z - high niche diversity and warm water temperatures

Explanation:

because high niche and warm water temperatures support more plant life, and its easier for the animals to survive these temperatures. I hope this makes sense!

Answer:

D) Z - high niche diversity and warm water temperatures

Explanation:

2021 Edge :)

Three factors that cause genetic variation are genetic mutations, genetic drift and random mating.

Genetic variations are defined as the changes which occur in the genetic sequence of the DNA. These genetic variations are very vital as they enable the living beings to evolve and therefore survive. The three factors bring about genetic variation are genetic mutations, genetic drift and random mating.

A genetic mutation can be defines as a change that occurs in the DNA sequence of a particular gene which leads to the formation of a different kind of product. Genetic drift is the alteration in allelic frequency by chance. Random mating can be defined as the mating between two individuals which is not dictated by the social or genetic preference.

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Answer:

definitely d it relies mostly on the placebo effect

The chloroplasts are these. Maintain a close eye out for any movement in the chloroplasts. Cytoplasmic streaming is the term for movement within a cell.

In both low-light and high-light conditions, efficient photosynthesis depends on chloroplast mobility. The aforementioned claim is true since chloroplasts are an organelle that travel throughout cells through cytoplasm. Every type of cell is filled with a thick fluid called cytoplasm, in which organelles are both suspended and free to move. The cytoplasm is the home of all organelles, including the nucleus, endoplasmic reticulum, chloroplasts, and mitochondria. We may infer that chloroplast is an organelle that moves inside the cell with the help of cytoplasm since the section of the cytoplasm that does not contain organelles is known as cytosol.

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Answer:

The first one is in metaphase

Explanation:

Answer:

Picture !!

Explanation:

I took the test

Answer: snails clams and squid have in common is MOLLUSKS

Explanation: MOLLUSKS an invertebrate of a large phylum which includes snails, slugs, mussels, and octopuses. They have a soft unsegmented body and live in aquatic or damp habitats, and most kinds have an external calcareous shell.usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body. Along with the insects and vertebrates, mollusks are one of the most diverse groups in the animal kingdom, with nearly 100,000

Albinism and Huntington's disease are two instances of human autosomal Mendelian traits. Phenylketonuria is another example of a human mendelian trait: This illness is an illustration of a Mendelian trait since it is passed down from parents to children when both parents have heterozygous (Aa) and homozygous (Aa) circumstances. 

Human characteristics known as Mendelian traits are those that are heavily influenced by Mendelian inheritance. Mendelian inheritance is the term used to describe how qualities that are regulated by a single gene with two alleles, one of which may be dominant to the other, are passed down from parent to child. Even though just a few human features are governed by a single gene with two alleles, they provide a solid foundation for learning about human heredity.

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Answer:

1. Non-living

2. Reproduce

3. Nucleic acid

4. RNA

5. Protein

6. Capsid

7. Burst

8. Lytic

9. Lysogenic

Explanation:

Viruses are set of organisms classified as NON-LIVING (1) because they do not exhibit the characteristics that living things exhibit. Viruses are incapable of REPRODUCING (2) on their own, and hence, need a living host to infect in order to replicate itself.

In the structural composition of a virus, it is made up of only one type of NUCLEIC ACID (3), which can either be DNA or RNA (4). The nucleic acid is surrounded by a PROTEIN (5) coat called CAPSID (6).

There are two ways a virus can infect its host. First, it can replicate itself causing the host cell to BURST (7) or lyse in a process called LYTIC CYCLE (8). Also, the virus can remain dormant in the host cell and continually replicate with the host cell in a process called LYSOGENIC CYCLE (9).

Answer:

C DNA and Protines

Explanation:Nuclear DNA does not appear in free linear strands; it is highly condensed and wrapped around nuclear proteins in order to fit inside the nucleus.

Answer:It is a parasitic relationship

Explanation:This is because the mushroom feeds of the Log and the log doesnt get anything in return

Answer:

(4)

Explanation:

Mushrooms grow on logs for their nutrients. Remember mushrooms are decomposers that is why they would use the log for nutrients. The tree is already dead and is rotting so it can’t produce oxygen and the log isn’t benefiting from the mushrooms since it’s dead

this is why the correct answer is (4) The mushrooms use the log as a food source.

For every described currently living species of organism, there are about 1/6 fossil species.

Fossil species are species that have been preserved in the fossil record. Fossil species are usually the remains of ancient organisms that lived millions of years ago, and are found in sedimentary rocks. They provide a window into the evolutionary history of the Earth, and are important for understanding the relationships between extinct and living species. Fossil species are also used to reconstruct ancient environments and ecosystems. Fossil species can be identified by their morphology, or physical characteristics such as size and shape.

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Metamorphism occurs when the heat rising from below causes the part of the metamorphic rock to melt, forming magma.

Metamorphic rocks are formed from other rocks which substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks are formed when the rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, the combination of these factors.

Metamorphism occurs when the solid rock undergo changes in the composition and texture without mineral crystals undergoing melting, which is how the igneous rock is generated.

If there is too much heat or pressure applied, the rock will melt and become magma. This will result in the formation of an igneous rock, and not a metamorphic rock.

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Answer:

There are many ways that drug-resistant infections can be prevented: immunization, safe food preparation, handwashing, and using antibiotics as directed and only when necessary. In addition, preventing infections also prevents the spread of resistant bacteria.

Explanation:

Carbon dioxide (CO2) has an indirect effect on other species in a marine food chain through its role in the process of photosynthesis. Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy, using CO2 and water as reactants. Oxygen is produced as a byproduct of photosynthesis.

In a marine food chain, photosynthesizing organisms, such as algae and seaweed, are primary producers. They form the base of the food chain, providing energy for other organisms, such as herbivores, which feed on them. Higher up the food chain, carnivores feed on herbivores and other carnivores, and so on.

The indirect effect of CO2 on other species in a marine food chain is through its role in photosynthesis, which provides the energy that forms the base of the food chain. If the concentration of CO2 in the water is too high, it can interfere with the process of photosynthesis, leading to reduced growth and productivity of photosynthesizing organisms. This can have cascading effects on the rest of the food chain, as the reduced availability of energy at the base of the food chain can lead to decreased population sizes and reproductive success of higher level consumers.

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The rise in the carbon dioxide dissolved in the waterbodies increases the temperature which results in the acidification of water pH.

Acidification of the water bodies such as lakes, seas, and oceans due to an increase in the concentration of carbon dioxide is known as the acidification of the water bodies. The increase in atmospheric carbon dioxide is due emission of carbon dioxide from various human activities.

This carbon dioxide gets dissolved in the oceans and seas. The average measured pH of the oceans and seas is 8.1 which is alkaline in nature. Due to dissolved carbon dioxide, the pH gets diverted towards the left which is the acidic side.

Therefore, acidification affects marine life.

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When Trp amino acid is limiting, the mRNA basepairs to itself, blocking the RNA polymerase from transcribing the operon. So option c is correct.

Attenuation works by causing the mRNA to form a stem-loop structure that is recognized by the RNA polymerase. When the mRNA contains this loop, the RNA polymerase is blocked from transcribing the operon. This blocking mechanism turns off the production of proteins related to tryptophan, such as enzymes for its synthesis and transport, when tryptophan is in short supply.

The loop structure also prevents the mRNA from attaching to the promoter sequence, which normally activates the RNA polymerase. In other words, when tryptophan is limiting, the mRNA does not attach to the promotor sequence and the operon is not transcribed. The result is that the transcription of the tryptophan operon is inhibited when the cell senses that tryptophan is in short supply.

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Answer:

A. How can the formation of covalent bonds between amino acids be blocked?

Explanation:

An antibiotic is any chemical substance that is active against certain bacteria. The majority of antibiotics that inhibit bacterial protein synthesis act by targeting the two subunits (30S and 50S) of the bacterial ribosomes, thereby stopping translation. The bond that binds two different amino acids is a covalent peptide bond produced when the carboxyl group of one amino acid residue reacts with the amino group of another amino acid to form a bond. Thus, amino acid residues are linked by peptide bonds at the carboxyl-terminus (C-terminus) of the growing polypeptide, and therefore when this binding is blocked, protein synthesis cannot progress.

A question that may direct antibiotic research is "How can the formation of covalent bonds between amino acids be blocked?"

The ribosome of a representative bacterium, Escherichia coli, has a coefficient of 70S sedimentation and consists of a 30S and a 50S subunit. THE 30S subunit contains a piece of the rRNA molecule with 16S and 21 proteins different, while the 50S subunit contains two pieces of rRNA, rRNA with 23S and rRNA with 5S and 34 different proteins.

With this information, we can conclude that the inhibitors of protein synthesis block the translation process at different stages.

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