Answers
7.)sperm smaller than egg
8.)false
9.)true
10.) The plant embryo, sometimes called the seed embryo, is the part of a seed or bud that contains the earliest forms of a plant's roots, stem and leaves. The embryo develops after a fertilized adult plant flowers, and is generally contained within a seed or bud.
Truly hoped this helped
Related Questions
tissue structure experiment please.
Answers
Answer:
Histology is the branch of biology which is related to the study of tissues.
The following are the general steps which are to be taken to examine a tissue under a microscope.
Fixation:Fixation protects the tissue from autolysis. It hardens the tissue due to which it becomes easier in cutting the thin sections of a tissue. Fixation is done with the help of chemicals like aldehydes.
Selection:Selection is done to isolate the particular tissue which we want to observe.
WaxingParaffin waxing is done so that the tissue remains embedded.
Staining:Staining is done so that the tissue can be seen and separated from other tissues.
MicroscopeThe tissue can then be observed under a microscope.
explain some of the various medieval literary forms. why were writers employing these literary forms?
Answers
Answer:
Medieval poetry, medieval drama, medieval allegory, medieval mysticism, medieval travel literature are some forms of medieval literature. The writers employed these forms to expand the boundaries of literature disciplines.
Explanation:
The discipline of literature can be referred to as the most ancient of all knowledge disciplines. It is because the art of literature existed, humans could grow through understanding. The medieval literature was rich in content and spoke mostly about contemporary ideals, values, lifestyles, thoughts, etc.. Why are the effects of acidic deposition often felt in ar-
eas far from where the primary pollutants are produced?
Answers
Answer:
Acid desposition is very harmful for the environment because it can easily combine with primary pollutants like carbon monoxide, particulate matter, sulfur oxide etc and form harmful substances.
Explanation:
Acid desposition means acid forming pollutants in the atmosphere that can easily combines with the primary pollutants which is emitted from car and energy power plants.One of the major culprit is sulful dioxide which is released from car. Once they react with water, produce sulfuric acid and nitric acid. Their pH is extremely low thus they acts as acid.These acidic desposition create hazards in aquatic body,wetlands,aquatic fishes,shell fishes,may cause nitrogen pollution and also cause damage in ecosystem.This is the main reason that acidic desposition often felt in area far from pollutants so that it does't hamper the ecosystem.A scientist wants to observe the structure that joins a cell to neighboring
cells. How should the scientist observe the detailed structure of the cell?
) A. The scientist should prepare a culture of the cell.
O
B. The scientist should prepare a medium for the cell.
O
c. The scientist should use a light microscope.
D. The scientist should use an electron microscope.
Answers
Cells are the smallest, functional, and structural living beings. The cell is composed of different organelles and carries out vital functions. If a scientist wants to observe the cellular structure, then they should use a microscope.
The correct answer is:
Option D. The scientist should use an electron microscope.
Cells are microscopic living entities, which can be observed through a microscope. The features of an electron microscope are:
1. Electron Microscope have a much shorter wavelength than visible light, which helps in the better resolution of the specimen.
2. The microscope uses a beam of accelerated electrons to power the source of illumination.
3. Electron microscope is widely used to observe biopsy samples, metals, cells, and macromolecules.
Thus, the electron microscope will be used by the scientist to observe a clear and magnified structure of the cell.
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Answer:
D:Scientist should use an electronic micromicroscope
Explanation:
How do viruses replicate?
Answers
Answer:
When a virus get access into an accommodating host body , it infuses its genes into the host's cell and uses this medium to replicate itself in a large number
Explanation:
In nature, a virus can't replicate itself it replicate only with the help of the host cell.
Explanation:
The replication of the virus comprises six steps they are attachment, penetration, uncoating, replication, assembly, and release. Due to the absence of the reproductive organelles, the virus replicates only with the help of the host cell. They use the organelles of the host cell to replicate and injects its genetic material into a cell during attachment and penetration. After uncoating replication occurs. During the replication of the virus in a host cell, it produces a protein called the capsid. The total replicate cycle of a virus along with the host is called the lysogenic cycle.Copper exists in nature as two isotopes. The atomic masses and relative abundance of these isotopes is given in the table. What is the average
atomic mass of copper?
Isotope
Cu-63
Cu-65
Relative Abundance(%)
69.17
30.83
Atomic Mass (am)
62.93
64.94
A. 62.93 amu
B. 63 55 amu
C. 63.935 amu
D. 64.94 amu
E. 127.87 amu
Answers
The average atomic mass of the copper from the two given copper isotopes is 63.55
Explanation:
The average atomic masses of the isotopes of an element is calculated by the addition of the masses of the two isotopes in proportionality to their percentage of natural occurrence.
Cu-63 relative abundance 69.17 Atomic mass 62.93
Cu-65 relative abundance 30.83 Atomic mass 64.94
Average atomic mass= Cu 63 Atomic mass*relative occurrence percentage+ Cu 65 Atomic mass*relative occurrence percentage
62.93*0.692+64.94*0.308
= 63.546 amu is the average atomic mass of copper.
when an atom gains or loses electrons , the charged particle that results is called a(n)
Answers
Answer: Ion / Ions
Explanation: When a neutral atoms loses or gains electrons they become charged atoms in which called as ions.
Structures in plant leaves that open and close to maintain homeostasis are called _____.
flowers
stomata
stems
nodes
Answers
Answer:
stomata
Explanation:
Stomata are "pores" located on the underside of leaves to let out water and maintain homeostasis (internal balance) within the plant.
A certain population of bluebirds eats spiders as a major food source. Which of the following ecosystem changes would impact this population of bluebirds the most?
Answers
Answer:
Explanation:
Predators
Human activities
Answer:
an increase in the spider and insect populationExplanation:
s-waves cannot travel through liquids,including earths?
Answers
Answer:
Shear waves cannot travel in liquids or gases -- so, for example, S waves don't travel through the ocean or through the outer core. Surface waves are called surface waves because they are trapped near the Earth's surface, rather than traveling through the ``body'' of the earth like P and S waves.
A farmer found that one tree in his pear orchard bore especially delicious fruit. Which method would most quickly provide a large crop of these pears?
Answers
Answer:
Grafting branches from this tree onto other trees in the orchard.
Explanation:
In the field of gardening, grafting can be described as a procedure in which a part of a plant such as the shoots with desirable traits is cut in an inclined manner and joined to the another plant's parts such as the roots or shoots. As a result, the two plants are united and they will grow. Such a technique will allow other crops to also produce delicious fruit. Hence, grafting is an effective technique used by farmers to produce more plants with favourable characteristics.
Explain what happened genetically in the insect population over time as the insects were exposed to pyrethroids.
Answers
Answer:
The insects developed pyrethroid resistance.
Explanation:
Pyrethroid Insecticides:
Pyrethroids are synthetic derivatives of the natural compounds, pyrethrins, produced by Chrysanthemum plants to prevent insect attacks.Pyrethrins work by locking sodium channels in the cell membrane. This inhibits nerve impulses and paralyses the insect, ultimately resulting in its death. In the 1940s, synthetic pyrethroid insecticides were first used on auricular crops. But till the 2000s, 100 of insect species were resistant. This occurred due to the fact that the allele for pyrethroid resistance increased throughout the population.Pyrethroid resistance developed to enable the insects to survive. Natural selection allowed an exponential transfer of insecticide resistance genes throughout the insect population.Three major mechanisms of resistance were identified by scientists:Increased expression of genes involved in toxin detoxification.Decrease in sensitivity of the target proteins (on which pyrethrins act).Decrease in the insecticide penetration through the cuticle.Answer:
B) The allele for pyrethroid resistance increased throughout the population.
Explanation:
The allele for pyrethroid resistance increased throughout the population. Variation exists. The allele for resistance remained as those insects not resistant died out. Over time the resistant allele in the populations increased.
need this asap no rocky
Answers
Answer:
carp
Explanation:
An organism dies, and its body leaves an
impression in mud. Over time, the mud
hardens into rock, and the impression
becomes a fossil. Which kind of fossil was
formed? SC.7.L.15.1
Answers
Answer:
sedimentary rock fossil and if am not correct am sorry I tried
Answer:
mold
Explanation:
because it changes over time and formes to a formation of mud
Empirical evidence is obtained using our human senses, which statement
best explains the importance of empirical evidence in science
A. This type of evidence is impossible to repeat.
o
B. This type of evidence is personal and unsupported,
o
C. This type of evidence can be checked by others,
o o
D. This type of evidence is provided by authorities,
Answers
The statement “This type of evidence can be checked by others” best explains the importance of empirical evidence in science.
Explanation:
There are all kinds of evidence used in science, but empirical evidence is obtained as a result of repeated experiments and observations. This evidence is used to either support or argue against a scientific theory. Empirical evidence is the preferred evidence since this kind of evidence can be peer reviewed, i.e. reviewed by other scientists and/or researchers. In other words, the experiment can be redone, and the evidence can be tested.
Do the shortest duration of insolation and the minimum temperature occur in the same month?
Answers
Answer:
Yes, the shortest duration of insolation and the minimum temperature occur in the same month.
Explanation:
The shortest duration of insolation occurs in month of December and sometime the minimum temperature may also occur in the month. The shortest day of the year is December 21 and insolation at that day is also shortest of the year. If the sun is out for a longer time the temperature will be much greater, because the sun is shining for a greater amount of time.The photograph Depicts a condition called syndactyly. Explain what might have happened during development to result in this condition
Answers
Answer:
Cells in between the toes did not undergo apoptosis during the development of the fetus resulting in webbed toes.
Explanation:
According to the law of conservation of matter, matter is never created or destroyed. Yet in a food pyramid the amount of
biomass decreases as we move up through the pyramid, from producers to top level consumers. Why?
Answers
In a food pyramid the amount of biomass decreases as we move up through the pyramid, from producers to top level consumers because, Matter changes to other forms that might not continue to be a part of the same food chain.
Explanation:
It is essential for any living organism to maintain a good health for survival. The good health refer in attaining the necessary nutrients. This can be achieved using the Food pyramid. This helps in getting the nutrients at accurate amount that is helpful in maintaining a good health. There are similar types of nutrients that exists in a food type. These are classified under one group and they form the food pyramid.
Producers are those that have ability to make food for them on their own. For example plants. Plants can get carbon dioxide from atmosphere prepares food for them through photosynthesis process and releases oxygen that helps humans to survive. Consumers are those that depends on something for their food. In a food pyramid, when we move upwards, as the matter changes its forms, which will not sometime become a part of similar food chain, there will be a decrease in the biomass amount.
Ari drew a diagram to show organisms in an ecosystem. What did Ari draw?
Answers
Answer: food web
Explanation:
Ari drew a diagram to show organisms in an ecosystem. Due to this, he draws a diagram of the food web.
What is an Ecosystem?An ecosystem may be defined as a type of place or an area where individuals of different species live together and interact with one another for the purpose of food, shelter, and space along with a mating partner.
According to the context of this question, the food web is the diagram that is drawn by Ari in order to express numerous organisms in an ecosystem.
A food web may be characterized as the interconnection of the number of food chains with each other in order to form a web-like pattern. In this type of arrangement, one organism can hold more than one position.
Therefore, Ari drew a diagram to show organisms in an ecosystem. Due to this, he draws a diagram of the food web.
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Question 4 of 10
2 Points
A trait is influenced by several genes. There are two alleles for each gene.
What is the best classification for the inheritance pattern of this trait?
O
A. It is determined by polygenetic inheritance,
O
O
B. It is determined by homozygous recessive alleles.
O
C. It is determined by incomplete dominance.
O
D. It is determined by multiple alleles for each gene.
SUBMIT
Answers
Answer:
It is determined by polygenetic inheritance (NB I think this should read polygenic inheritance)
Explanation:
Polygenic inheritance occurs when multiple genes act together to produce one trait. A good example of this in humans is height. The trait for height is not simple the result of 2 alleles of 1 gene, but 2 (or more) alleles of several genes that all work together to determine height. These traits are sometimes called complex traits or quantitative traits and do not undergo simple Mendelian inheritance.
A trait influenced by several genes with two alleles each is characterized by polygenetic inheritance. This is a system where multiple genes cooperate to express a trait, allowing for a wide range of phenotypes.
Explanation:A trait that is influenced by several genes and has two alleles for each gene is best classified as being determined by polygenetic inheritance. In this model, multiple genes, or polygenes, cooperate to express a particular trait. For example, human height and skin color are both determined by polygenetic inheritance. Unlike single-gene inheritance patterns such as homozygous recessive alleles or incomplete dominance, polygenetic traits can exhibit a wide range of phenotypes because they depend on a larger number of genetic variables.
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What would most likely be included in the "Analysis" section of a lab report?
Answers
Complete Question:
What would most likely be included in the “Analysis” section of a lab report?
1) a discussion of any errors in the experimental data
2) a list the supplies that were used in conducting the experiment
3) suggestions for new experiments based on the results
4) a description of what the dependent and independent variables were
Answer:
1). a discussion of any errors in the experimental data.
In the analysis section of the lab report, after analyzing and investigating the data, errors are identified in the experimental data. Furthermore, discussion carried out to point out those error occurred in the data. In an analysis process discussion is carried out to find the errors in the whole process. In this process all facts and figure are gather to inquire if there are any errors or mistake present in the final values or final result. Analysis section in a lab report has a key role because it make sure that the final result is error free.
how does nitrogen leave a food chain?
A. Primary consumers eat nitrogen-containing green plants.
B. Producers absorb nitrogen-containing nutrients by their roots.
C. Decomposers break down nitrogen-containing waste material from primary consumers.
D. Denitrifying bacteria convert nitrogen-containing nutrients in the soil into atmospheric nitrogen.
Answers
Answer: c
Explanation: Plants and animals need nitrogen to make proteins but they cannot take it in from the air. Because nitrogen is unreactive as a gas, it has to be transformed into a new molecule. When bacteria in the soil takes nitrogen from the air, it becomes nitrates. Finally, it can move through the food chain in this form.
A completed Punnett square shows all of the following except
Answers
Answer:
A completed Punnett square shows all of the following except "the actual results of a genetic cross"
Explanation:
As we know, that genetic crossing is the determined breeding of the two specific individuals which results in the mixing of the genetic materials that are visible in the offspring. These crosses can be done in the different models like plants, yeasts, flies and also in the mice. These organisms are mostly used for the dissection to know the genetic processes or can be used for creating some novel characteristics. They are mostly two types i.e. monohybrid and dihybrid cross.
A Punnett Square shows all combinations of genes an offspring might inherit from two parents, but it does not show the offspring's actual physical appearance or observable traits (the phenotype), or detail the mechanisms of gene action.
Explanation:A Punnett Square is a tool used in genetics to determine the possible genotypes of offspring resulting from a cross between two individuals, each having a particular genotype. It visually displays all possible combinations of alleles transmitted by each parent to the offspring, allowing the prediction of the probability of offspring inheriting a given genotype.
However, it's important to note that there is one major thing a Punnett square does not show: the actual physical appearance or observable traits (the phenotype) of the offspring. Although the genotypes are represented, the phenotype may not be determined by a Punnett square alone because dominance, co-dominance, incomplete dominance, and other genetic effects are not depicted by this tool. Also, it does not detail the mechanisms of gene action or how certain genes may interact with each other or the environment to express a phenotype.
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Cancer is the product of a mutation that
A) causes the uncontrollable growth of cells
B) changes the structure of hemoglobin in the blood
C) brings out stunted growth and severe pain
D) causes a translocation in a pair of chromosomes
Answers
Answer: A) causes the uncontrollable growth of cells
Explanation: Cancer can eventually lead to a tumor which has a large mass
An albino woman has 8 children with the same ma. 5 of which are albino. What is the fathers genotype?
Answers
Answer:
3 is the father's genotype.
Explanation:
May this answer help you !!!!
Which phase occurs directly after s phase
Answers
Full question:
Which phase occurs directly after s phase...
A. G1
B.G2
C. Cytokinesis
D.M phase
The phase that occurs directly after s phase is G2 phase.
Explanation:
The Synthesis phase is termed as S phase. This phase in the cell cycle occurs between two phases namely G1 and G2.It is the place where the replication of DNA takes place. This phase will make the DNA to chromosome and this is highly regulated. This phase is an important phase in the cell cycle as the replication of DNA occurs in this phase.
Apart from the replication of chromosomes, the growth of the cell that starts in the G1 phase will be continued with this phase. Thus when the replication of DNA is full done, then S phase will be completed and it proceeds to the G2 phase.
Which of these is an example of land contamination?
O
A. Desertification
* O
B. Garbage dump
O
C. Recycling bin
O
D. Deforestation
Answers
Answer:
B
Explanation:
desertification and deforestation are effect of land contamination and other environmental threats.
this is a recycle bin...and it wont harm anyone...It will recycle the grabage and...help our environment.
Garbage dump will contaminate our water ways with hazardous chemicals...and it will release green house gases like methane....and also when enough methane was produced it can even cause explosions...dont foget the bad odour.
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An example of land contamination is garbage dumps. The correct option is B. Garbage pollutes the land, water, and air.
What is contamination?Contamination is the state or presence of unwanted and undesirable things or elements that pollute, infect, or make dirty a place. Contamination can be of anything, and it affects both the place and the health of the people.
Garbage is the unwanted or filthy elements that have to dispose of carefully, but garbage dumping anywhere contaminates the land, water, and air.
Thus, option B. Garbage dump is correct regarding contamination of land.
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Determining risk of possible genetic defects can occur before or after conception and includes all of the following approaches EXCEPT:
Group of answer choices
linkage analysis.
Amniocentesis.
karyotype analysis.
pedigree analysis.
chorionic villi sampling.
Answers
Answer:
Linkage analysis
Explanation:
Linkage analysis is the only example here that does not look at possible genetic risks, such as looking for abnormal chromosome structures (karyotype) or family history (pedigree analysis).
Instead, linkage analysis is used to narrow down the chromosomal location of a particular trait. That is, it is a method used to find segments of chromosomes that harbour a particular trait.
A person who was infected with many common diseases as a child will contain more of which of the following compared to a child who was not exposed to many diseases?
A) Memory cells that provide a specific defense
B) Memory cells that provide a nonspecific defense
C) monocytes that provide a specific defense
D) monocytes that provide a nonspecific defense
Answers
Answer:
the answer is C
Explanation:
the answer is C
Answer: monocytes that provide a specific defense
Explanation:
Do my eyes have a faint fold?