economic importance of earthworm​

Answer:

D) Chromosomes can align in metaphase I in multiple possible arrangements in a process called independent assortment.

Explanation:

Answer:

D

Explanation:

I had the same exact question and i just got it right.

Answer:

What Is DNA's Role in Inheritance? DNA is the genetic information used to make proteins, and it contains the hereditary traits of organisms. There are two types of DNA: mitochondrial DNA, which you can only get from your mother, and nuclear DNA, which is a combination of both your ancestors' DNA.

DNA is the molecule of inheritance because it contains the genetic information passed from parent to offspring. Its structure allows for replication and transmission of this information. DNA is composed of four nucleotides that can be combined in different sequences to encode instructions for living organisms.

DNA is the molecule of inheritance because it contains the genetic information that is passed from parent to offspring. The structure of DNA allows for the replication and transmission of this genetic information. DNA is composed of four nucleotides: adenine (A), thymine (T), cytosine (C), and guanine (G). These nucleotides can be combined in different sequences to encode the instructions for the building and functioning of living organisms.

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Answer:

haha thats cute. im guessing there is no question in this?

Gibberellic acid is a natural growth hormone present in plants which helps plants to control growth naturally. Spraying additional gibberellic acid helps to stimulate plant growth. So even if it is not sprayed externally, the natural acid present in the plants still controls the growth.

Explanation:

Gibberellic acid (gibberellin) is naturally found in growing apical regions like the shoots, new young leaves, flowers. In the shoots, it helps to increase the inter-node length and thereby increases elongation of a plant through apical growth. They control the growth by acting as chemical messengers.

Farmers usually spray gibberellic acid during seed germination to accelerate plant growth, budding processes, increase foliage and flowering.  Spraying farms with bioactive gibberellins have led to a huge increase in plant growth leading to the green revolution.

Animals combine oxygen chemically with hydrogen atoms that they remove from their food—that is, from organic materials such as sugar, protein, and amino acids. Animals release water as a waste product from the oxygen respiration. Animals, like all heterotrophs, use organic materials as their sole source of carbon. - (www.britannica.com)

A gamete is randomly getting a copy of a chromosome from its mother and father. This means that gamete will get #1 from the mother and the next chromosome will be a pure chance of getting chromosome #2 from mother or father.

Explanation:

Answer:cytokinesis

Explanation:

Answer:

cytokinesis

Explanation: look at the cell cycle

Answer:

Dorsal cavity

I hope it is correct for you!!!!!!!!!

The paranasal sinuses are cavities in the head that are separate from the major cavities like the cranial and spinal cavities.

The cavities in the head that are not included within the major cavities are the paranasal sinuses. These are air-filled spaces located within the bones of the skull and face, including the frontal, ethmoid, sphenoid, and maxillary sinuses. The paranasal sinuses are lined with mucous membranes and help to warm and humidify the air we breathe.

Some functions of the paranasal sinuses include reducing the weight of the skull, resonating the voice, and providing a buffer zone for facial trauma.

Therefore, the paranasal sinuses are cavities within the head that are separate from the major cavities such as the cranial and spinal cavities.

Answer:

Organs make up the larger parts of an organism and are made up of tissues. Organelles are structures which are found inside a cell which carries out a specific life process.

Organelles are microscopic whereas organs are macroscopic.

Organelles form cells, cells will form tissues and tissues will form organs.

Organelles are found in all eukaryotes where as organs are mostly present in just plants and animals.

Examples of organelles include nucleus, Endoplasmic Reticulum, ribosomes, vacuole etc. Examples of organs include heart, kidney, liver, brain, lungs.

Penguins are the rarest commodity of Antarctica. The paths they follow, carved by thousands of tiny footsteps, lead to Antarctica's rarest commodity.

Explanation:

The treaty sets aside Antarctica as a logical protect, sets up opportunity of logical examination, and bans military movement on the landmass. The bargain was the primary arms control understanding built up during the Cold War.

There are no regions in Antarctica by the Antarctic Treaty so you can travel anyplace on the landmass. In any case, by a similar settlement, there are various rules that all guests are required to follow. For instance, to regard logical research.

Various organisms undergo cellular respiration, including animals, plants, fungi, and most bacteria.

Cellular respiration is a fundamental process in which cells convert glucose and oxygen into energy (ATP) while producing carbon dioxide and water as byproducts.

In animals, cells in tissues and organs carry out respiration to power their physiological functions.

Plants perform cellular respiration in addition to photosynthesis, utilizing oxygen during the night and in non-photosynthetic tissues.

Fungi, like animals, rely on cellular respiration for energy production. Even many single-celled organisms, such as bacteria, perform cellular respiration to extract energy from nutrients.

This process is vital for life, providing the energy needed to sustain various biological activities.

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Answer:year lights

Explanation:

A light-year measures the distance light travels in one Earth year, which is about 9.5 trillion kilometers. Grace is correct in her definition, while Thomas is incorrect, as a light-year is not a measure of travel time but rather of distance.

Grace's understanding of a light-year being a measure of distance between two stars or galaxies is correct. A light-year is indeed the distance that light travels in a vacuum in one Earth year. Since light travels at about 300,000 kilometers per second, a light-year equates to approximately 9.5 trillion kilometers. This measurement is used by astronomers to express astronomical distances that are beyond the scale of our Solar System, making it a crucial concept in understanding the vastness of space.

On the other hand, Thomas is mistaken. A light-year is not a measure of the time it would take a human to travel between two places in the galaxy; rather, it's a measure of how far light can travel in a year. When we look at a star that is, say, 4 light-years away, we are seeing it as it was 4 years ago because that's how long it has taken the light to reach us.

The setting which would allow us to observe a specimen with the highest possible magnification is the Objective 10x Ocular 10x.

Explanation:

To observe a specimen with the highest possible magnification is the magnification needed to be the maximum. To gain such a magnification, magnification power of objective and magnification power of ocular or eye lens will be required together at max being the product. Because,

Magnification of object = magnification by ocular lens x magnification by objective lens.

Thereby, among the option, when the magnification power of objective lens is 10X and that of ocular lens is 10X, together will produce a magnification of 100X.

Final answer:

The highest possible magnification to observe a specimen can be achieved using the oil immersion objective lens with a magnification of 1000X and a resolution of 0.2°m.

Explanation:

To observe a specimen with the highest possible magnification, you should use the oil immersion objective lens on a light microscope. This lens can achieve a total magnification of 1000X, which means objects appear 1000 times larger than they are. A resolution of 0.2°m is the practical limit due to the diffraction of light waves, but the oil immersion objective allows for the observation of small structures such as bacteria, which are difficult to see clearly without this enhancement.

When preparing to use the oil immersion lens, you should first sequentially increase the objective magnification up to 40x. Once you focus on the target area, you can then swing the objective halfway to 100x magnification and add a drop of immersion oil to the area of analysis before finally focusing the specimen at the full 1000x magnification using the oil immersion objective.

Answer:

Explanation:

Answer:

D temperature

Explanation:

The statement that correctly compares the thickness of layers of Earth is that Earth’s lithosphere is thinner than its asthenosphere.

Explanation:

The thickness of the asthenosphere is nearly 660 kilo metres and that of lithosphere thickness is nearly 100 kilo metres. therefore it is very clearly evident that the lithosphere is thinner that asthenosphere.

Not only that, lithosphere is nearly 6 times thinner than that of thickness of asthenosphere. The oceanic crust of Earth is thinner than mantle of the Earth. The outer core of the Earth is thinner than the mantle and the lithosphere is thicker than continental crust of the Earth.

Variation is inherited is one of the four conditions necessary for natural selection to occur in a population

Explanation:

Natural selection is a process in which organisms pass on the heritable trait to their offspring and they adapt to the environment leading to evolution.

Natural selection  will occur if the large population is there in which a random mutation has occurred and some organisms in the population have inherited varied characters and passed on these useful characters to the progeny.

Natural selection depends on the environment, random mutation and genetic variation.

This phrase belong in Y on the diagram.

D. In Y

Explanation:

The Venn Diagram represents the work of Scientists, Schleiden and Schwann. Schleiden worked in the year 1838 and Schwann in the year 1839. Both Scientists studied cells and used microscope for carrying out the experiments. Schleiden was a Botanist and thus studied plant cells. Schwann was a Zoologist and thus studied animal cells.

Both of them contributed in proposing cell theory. Thus, Y marked region shows Schwann studied animals. The X region shows the study of Schleiden on plants. Z is the intersection area which shows studies of both the Scientists.

Answer:

D, In Y

Explanation:

clearly it was investigated on 2939

Answer:

Abiotic factors can be described as the non-living components of an ecosystem. Biotic factors can be described as the living components of an ecosystem.

Abiotic factors include all the non- living components such as the weather, climate, temperature, soil, water of an area.

Biotic components include all the living organisms like the plants, animals, microorganisms of an ecosystem.

Hence, abiotic factors best describe the temperature and weather conditions of an organism's environment.

The term that describes the temperature and weather conditions of an organism's environment is 'climate'. Climate and temperature significantly affect the physiology, metabolism, and survival of organisms, leading to various adaptations. Animals may be ectotherms, whose body temperature varies with the environment, or endotherms, who maintain a constant body temperature.

Climate is the word that best conveys how hot or cold an environment is for an organism. The long-term, dependable atmospheric conditions of a particular region are referred to as the climate. It may have a big effect on how organisms behave and survive. A biome's climate is identified by its regular seasonal temperature and rainfall ranges. Unlike weather, which describes the state of the atmosphere over short time frames, climate represents patterns over longer periods.

Temperature, an aspect of climate, is critical to organisms as it affects their physiology and metabolic functions. Many living organisms can only survive within a specific range of temperatures, mainly due to limitations in enzyme activity and metabolic processes. Some organisms have adapted to tolerate significant fluctuations in temperature. For instance, certain animals can hibernate, going into a state of lowered metabolism and body temperature to survive in cold conditions. Similarly, some bacteria, referred to as extremophiles, can survive in extremely high-temperature conditions such as those found in geysers.

Moreover, animals can be divided into ectotherms and endotherms based on how they deal with environmental temperatures. Ectotherms, such as reptiles, do not internally regulate their body temperature, which varies with the environmental temperature. Endotherms, like mammals, use internal physiological mechanisms to maintain a fairly constant body temperature, regardless of environmental temperatures.

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C. both animals and plants have changed over time

Answer:

Global Warming/ decline in Global Biodiversity

Explanation:

Deforestation causes a lot of negatives that we're experiencing right now.

Answer:

Rainforest deforestation is contributing to Desertification

Explanation:

Deforestation is the removal of trees in a forest without replacing them back, this process over time leads to desertification.

Answer:

I think its C. Viruses are not cellular and do not contain the lipid and protein markers targeted by antibiotics.

Explanation:

Viruses are not considering living and are different to bacteria; they have a different structure and a different way of surviving. Viruses don’t have cell walls that can be attacked by antibiotics. Antibiotics basically attack the cell wall of bacteria or attach to markers on cell wall of bacteria to trigger some deadly reactions in bacteria which causes them to die. Viruses don't have cell wall instead they are surrounded by a protective protein coat.

Unlike bacteria, which attack your body’s cells from the outside, viruses actually move into, live in and make copies of themselves in your body’s cells.  Viruses can't reproduce on their own, like bacteria do, instead they attach themselves to healthy cells and reprogram those cells to make new viruses.

Therefore, I strongly believe it's C.

Yes, the given activity is a correct example which describes phototropism

Phototropism is an adaptation or a survival mechanism undertaken by some plants to receive maximum sunlight in order to prepare more food and energy through photosynthesis.  

Explanation:

Phototropism takes place through receptor proteins called phototropins which act as blue light photoreceptors.

Phototropic activity:

Phototropism can best be observed by planting few plants including phototropic plants in pots and keeping them near the window to receive sunlight.

The natural bending of phototropic plants towards the window denotes their inclination towards sunlight.

The growth of sunflower plants facing towards the sun and blooming of lotus flower under sunlight are all examples of phototropism.

Other plants which are phototropic are Phalaenopsis, azuki beans, fungus of Phycomyces species, etc.

A- growing polypeptide       B- Lone amino acid

C-  tRNA                                      D- Anticodon

E- mRNA                                F- Small ribosomal subunit

G- codon                             H- Large ribosomal subunit

Explanation:

Methionine (start codon) , leucine, methionine, arginine, aspartic acid, glycine, glycine, leucine, histidine, stop codon

Three types of RNA that takes part in the translation are:

mRNA: It is formed by the process of transcription. The DNA strand is copied as mRNA with help of RNA Polymerase. The mRNA strand is single- stranded and consists of codons which code for amino acids for the protein synthesis. Not full sequence of mRNA codes for amino acid chain there are non-coding regions called introns which are removed during splicing and only exons code for the amino acid sequences.

tRNA: It brings the correct amino acid to the growing polypeptide chain by reading the codons from the mRNA. It has anticodon which helps in bringing the correct amino acid coding to mRNA sequence.

rRNA: rRna plus protein and ribosome makes up rRNA. The ribosomes are called protein factory,  because growing polypeptide chain is formed here. They are responsible for reading the correct amino acid bonding to form polypeptide. They are having two subunits smaller and bigger depending on their sedimentation rate by centrifugation.

In eukaryote,s protein synthesis occurs in the ribosomes which are present in the cytoplasm of the cell.

B. All the three nucleotides that code for amino acid are important because any base difference in amino acid will change the protein formed due to amino acid difference.

The question is about matching and identifying terms related to protein synthesis, as well as translating an mRNA sequence into an amino acid sequence.

In the given question, the student is asked to match each part of the picture with its correct label and then answer the question based on the provided information.

The labels include terms related to protein synthesis, such as mRNA, tRNA, codon, anticodon, growing polypeptide, large ribosomal subunit, and small ribosomal subunit.

The provided mRNA sequence, DACCCUAGÜCGGUAAAAAAAAA, represents a series of codons that can be translated into an amino acid sequence.

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Answer: In protein synthesis, an mRNA strand serves as a template while in DNA replication, a DNA strand serves as a template. Protein synthesis occurs in the ribosome while DNA replication occurs in the nucleus.

Explanation: DNA replication is a process by which a double stranded DNA molecule is copied into two identical daughter DNA molecules while protein synthesis is a process by which proteins are made from an mRNA molecule. In DNA replication, a DNA strand serves as a template while in protein synthesis, an mRNA strand serves as a template. DNA replication occurs in the nucleus while protein synthesis occurs in the ribosome. Another name for protein synthesis is translation.

Answer: 1 homozygous tall, 2 heterozygous tall, 1 homozygous short.

Explanation: If T is the tall trait and t is the short trait.

Answer: The phenotype ratio is 3:1

Explanation: If T represents tall trait and is dominant over t which is the recessive trait, there are 1 homozygous tall (TT), 2 heterozygous tall (Tt) and 1 homozygous short (tt) offsprings. All homozygous tall and heterozygous tall offsprings will appear outwardly as tall while the homozygous short offspring will appear outwardly as short. Therefore the phenotype ratio is 3:1

Answer:

Species B is the predator of species A.

Explanation:

The graph illustrates a predator prey relationship.

A predator can be described as an organism that eats other organisms while the prey is the animal that is killed and eaten by the predator. Both the predators and the preys usually co-exist in the same ecosystem. The relationship between the predator and the prey affect the population of the organisms in all ecosystem; it determines the mortality of preys and the birth of new predators.

Mother genotype is IAi (hetero-zygous) as the mother is a dominant trait.

Man is Rh negative and O type blood group its genotype is OrOr

Mother is A positive so her genotype would be either IAIA or IAi

Also A blood group is dominant over O blood group.

It is given:

two children are A POSITIVE

One child is A negative

So the mother must have been hetero-zygous with genotype IAi as one of children would received it from mother as it is a dominant trait.

Punnete square shows

      AI   Ai

i     AIi   Aii

i     AIi   Aii    

50 percent chances of A negative child is there.

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The mother's most likely genotype is heterozygous for both the ABO blood type gene (A and O alleles) and the Rh factor gene (Rh positive and Rh negative alleles), which is genotype IAiRr.

The question involves deciphering the mother's genotype based on the blood types and Rh factors of her children, considering that blood type and Rh factor are not linked genes and have their distinct inheritance patterns.

Given that the father's phenotype is O negative (ii, rr), and two of the children have A positive blood type, the mother must be heterozygous for both the ABO and Rh factor genes. The presence of a type A, Rh negative child, confirms the mother has at least one copy of the recessive Rh negative allele (r) and one recessive O allele (i).

Considering the inheritance possibilities, the mother's most probable genotype would be IAiRr, which is option B) IAiRr. This allows the mother to have children with type A blood (whether Rh positive or Rh negative) as observed and rules out her having two dominant Rh positive alleles or two dominant A alleles, which would make it impossible for her to have an Rh negative or type O child.

Explanation:

Photosynthesis

Aerobic respiration

Anaerobic respiration

Photosynthesis & Aerobic respiration

Photosynthesis & Anaerobic respiration

Aerobic respiration & Anaerobic respiration

All

Photosynthesis is a chemical reaction that fixes inorganic carbon into a complex molecule which stores converted light energy within its bonds. Cellular respiration is a complex process that starts in the cytoplasm. Glucose is split there for energy production. In oxygen-rich environments, eukaryotes may carry out aerobic respiration, while anaerobic respiration occurs in oxygen-poor ones.

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The Venn diagram should be filled by categorizing appropriate terms under Photosynthesis, Aerobic Respiration, and Anaerobic Respiration. Some items are unique to each category, while others overlap due to their relevance to multiple categories.

The Venn Diagram mentioned in the question seems to be designed to classify some phrases and terms under three states: Photosynthesis, Aerobic Respiration, and Anaerobic Respiration. Some of these elements from the item bank are exclusive to one state, while others can be associated with more than one state. Photosynthesis, for instance, would have 'Light energy converted to usable chemical energy' and 'CO2 + H2O reactants' associated with it. In the case of Aerobic respiration, phrases such as 'Uses oxygen to produce ATP', 'Converts glucose to ATP', and 'Oxygen is a reactant' would be a fit. For Anaerobic respiration or Fermentation, 'Does not require oxygen' and 'Glucose produced by autotrophs' would apply. Items such as 'Energy involved' and 'Chemical reaction' could be placed in the overlapping area as they are common to all.

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Answer:

Enzymes change shape during chemical reactions.  activation energy of a reaction.

Explanation:

Enzymes speed up chemical reactions by reducing the activation energy of the reactants. The substrate fits in the active site on the surface of the enzyme. The enzyme change shape during chemical reaction by the formation  of an enzyme-substrate complex.

Answer:

Enzymes lower the activation energy of a chemical reaction

Answer:

Spinach is the most nutrient dense green out there.

I know this because I learned it.

Answer:

spinach

Explanation:

if i got it wrong plz let me know :)