The stem cells are so controversial because it involves the destruction of the human embryo as well as its life for just research purposes only.
What are Stem cells?Stem cells may be defined as cells that are totipotent and pluripotent in nature and have the prospect to mature into many diverse types of cells in the body.
Embryonic stem cells are the type that is considered most unethical and controversial. The stem cell debate is the contemplation of the moralities of research involving the maturation and use of human embryos for only research methodologies.
Destruction of such important life for our own benefit or research purposes makes the podium controversial.
Therefore, it is well described above.
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Compare the origins of the external and internal iliac arteries of the fetal pig with those of the human.
The comparison between the origins of the external and internal iliac arteries of the fetal pig with those of the human are as explained below.
What are the origins of the arteries?In a human beings, it is well known that it is the aorta that undergoes division to form two common iliac arteries which give rise to external and internal iliac arteries.
However, In the pig it is different as the aorta undergoes division to form the external iliac artery while the internal iliac artery branches out from the aorta independent of that division
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What are the defining characteristics of ray-finned fishes?
Ray-finned fishes possess the characteristics of chordates.
Characteristics of ray-finned fishesThey are a group of fishes known as Actinopterygii in the Chordate phylum.
Thus, they possess the basic characteristics of chordates, such as:
Possession of hollow nerve cordPossession of notochordPossession of post- tailPossession of pharyngeal gill-slitsThis is in addition to basic features of fishes such as lateral lines, swim bladder, etc.
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Why have plants been implicated in the devonian glaciations and not in the proterozoic glaciations?
The reason why plants have been implicated in the devonian glaciations and not in the proterozoic glaciations is; Land plants had not yet evolved during the Proterozoic.
Why have plants been dying?The Devonian glaciation occurred in south America and caused a global narrowing of the warm climatic belts, sharp regression, increased clastic sedimentation.
Meanwhile, the Proterozoic glaciation occurred near sea level in low palaeolatitudes. Thus, we can say that the reasons why plants have been implicated in the devonian glaciations and not in the proterozoic glaciations is because land plants had not yet evolved during the Proterozoic.
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Dihybrid crosses In humans, rolling tongue is dominant over non-rolling and curved thumbs are dominant over straight thumbs. do a cross between: heterozygous roller/heterozygous curved and homozygous non-roller/homozygous straight. describe the phenotypes as fractions?
Answer:
Heterozygous roller/heterozygous curved, heterozygous roller/homozygous straight, homozygous non-roller/heterozygous curved, homozygous non-roller/homozygous straight
Explanation:
Hull fouling is a(n) _______ introduction of nonnative species. a. unintentional b. intentional c. unimportant d. land-based please select the best answer from the choices provided a b c d
Hull fouling is an (a). unintentional introduction of nonnative species
Meaning of Hull foulingHull fouling can be defined as an unintentional act that transport species from one place to another by water vessels.
Hull fouling also mean the attachment of species to a water vessel which leads to an unknowing transportation of such species
In conclusion, Hull fouling is an unintentional introduction of nonnative species
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Answer:
a. unintentional
Explanation:
trust nerds
The heart is actually (one, two, or three) pumps?
The heart has two pumps
Properties of the heartThe properties not the heart include;
It is divided into two pumping systemsThe right system receives oxygen - poor blood from the veinsThe left system gives out oxygen-rich blood through the artery to other organs of the body.It is divided into four chambersThus, the heart has two pumps.
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The heart as a vital organ is characterized as being an organ with two pumps.
How many pumps are in the heart?A typical heart is characterized by 4 chambers in which case, it has two upper and two lower chambers. The upper chambers, otherwise termed the right and left atria, receive low pressure incoming blood while the lower chambers, the more muscular right and left ventricles, pump blood out of the heart.
Hence, it follows the heart contains two pumps.
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1
4. How does energy move through your ecosystem? Think about the producers (plants)
and how energy moves from producers to other organisms. (3 points)
I
CE
Explanation:
There are several different factors that control the primary productivity of energy and biomass flow. Energy flow is the amount of energy that moves through a food chain. The energy input, or energy that enters the ecosystem, is measured in Joules or calories. Accordingly, the energy flow is also called calorific flow.
Question 10 of 10
If research is restricted, then the new discoveries made are limited. Which
action is most likely to decrease the number of discoveries scientists can
make?
OA. Ignoring public opinion
OB. Increasing private funding of research
OC. Eliminating government funding of research
OD. Removing government regulations
SUBMIT
Answer:
C. Eliminating government funding of research.
Explanation:
Government funding is the backbone for new research and discoveries in any country. Without government funding, the number of discoveries and technology will decline drastically because research requires lots of money which every private organization may not be able to provide.
What are the conditions for population equilibrium?
The death rate must balance with the birth rate while immigration and emigration must also balance.
Population equilibriumAn equilibrium is established in a population when the population neither decreases nor increases.
In order for this to happen, the number of deaths and births must be equal. In addition, the number of new individuals coming into the population must also be equal to the number of individuals leaving the population.
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Human Impact on Earth Lab Report
Instructions: In the Human Impact Lab, you task will be to assist the Global Protection Agency to decrease the effects of human impact on Earth. Record your observations in the lab report below. You will submit your completed report.
Name and Title:
Include your name, instructor's name, date, and name of lab.
Data:
Record the data in the table below for each of the locations.
Location Timeline Human Impact Measurements Recommendation to Decrease Human Impact
New York City
Water Pollution
(in parts per million) 50 years ago
Present Day
Future Development Impact
Amazon Rainforest
Levels of CO2
(in parts per million) 50 years ago
Present Day
Future Development Impact
Sahara Desert
Loss of land by Erosion (in meters) 50 years ago
Present Day
Future Development Impact
Explanation:
this is one question or one chapter can you please tell me the single question then I will answer
What format is typically followed with
a hypothesis?
A. a long explanation
B. a question
C. if, then statement
Wang
Answer:
C.
Explanation:
A hypothesis is always in the form of an if, then statement.
Plant cells are different from animal cells in this way:
Answer:
C . Cell wall and Chloropylast is correct answer
Explanation:
Because plants don't move so they have cell walls and chloroplasts but human cell moves so they don't need cell wall
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[tex]\red:\implies[/tex] Cell Wall ; Chloroplasts➥ Plants are autotrophic organisms which manufacture their own food. Plant cells have chlorophyll containing chloroplasts which are involved in the process of photosynthesis. A plant cell is surrounded by cellulosic cell wall which is dead at maturity. Chloroplasts and cellulosic cell wall are characteristics of plant cells only.
Which of the following is an example of a beneficial mutation?
A.
a mutation causing uncontrolled cell division in human tissue cells
B.
a mutation inhibiting human immunodeficiency virus from entering the host cell
C.
a mutation resulting in partial or complete loss of chlorophyll pigments in plants
D.
a mutation resulting in a squirrel being born without ovaries
Answer: A
Explanation: TOOK THE TEST OK
How does cladistics reconstruct phylogenies?
Cladistics reconstructs phylogenies by considering shared derived characters between taxonomic groups and the maximum parsimony criterium.
What is the cladistic analysis?Cladistics evaluate the relationship between different taxa according to shared characters.
The cladistic analysis follows the maximum parsimony criterium.
Explains the character state from the point of view of the fewest changes through history. Explains evolution with the minimal amount of evolutive changes.
It recognizes the monophyletic groups as natural groups. These groups are the clades, and their classification -sequencing- represents their phylogeny.
The sequencing term refers to lists of groups according to their relationship and their shared traits. One group is the sister group of the following one.
Cladistics uses cladograms to represent the common ancestral relationships and the emergence of different characters among the involved groups.
So the cladogram represents the relationship between taxonomic groups according to a derived character.
The derived character is any new trait that a group transmits to its descendants.
Through evolution, the characters change, and new changes are added. When referring to a derived character, we mean that all the subsequent groups in the cladogram carry and share the trait.
According to this framework, cladistics reconstructs phylogenies by considering shared derived characters and the maximum parsimony criterium.
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Dihybrid crosses
Black coat color is dominant over white coat color in guinea pigs. in addition to coat color, rough coat is dominant over smooth coat.
a. in a punnett square, demonstrate a cross between a homozygous black/homozygous rough with homozygous white/homozygous smooth. Describe the genotype and phenotype as fractions
Answer:100% black with rough for both phenotype and genotype;4/4,1
Explanation:
so if a black coat and rough coat are dominant and a guinea pig that is a purebred(homozygous)black coat with rough coat and a homozygous white coat with smooth coat breed the dominant allele will show up for both so as a result since the black coat and rough coat are dominant the result will be 100% black with rough coat.
Q3. Why do we need to break big molecules into smaller molecules?
Answer:
In order for them to be quickly and easily absorbed.
________________________________________________
Short Answer:
Enzymes help break down large molecules for us since certain of their components are the only ones that are useful to us. In order to create proteins, lipids, and other components necessary for survival, the tiny molecules become soluble and are quickly taken into the circulation. Additionally, they could need to travel through some membranes, therefore when they are little, they can do so without difficulty.
________________________________________________
Long Answer:
The nutrients in food must pass the gut lining in order to exit the digestive system and enter our blood. This absorption occurs in the ileum and jejunum regions of the gut. In some regions, the gut lining is brimming with chemical systems that may latch onto the food's smaller molecules and "chaparone" them across the gut and into the liver. These "chaparone" molecules can hold small peptides and amino acids but not whole proteins. Greater floor fragments do not absorb. Without "chaparones," some of the stomach-digested products pass through the gut's pores, but they must be smaller than the pores. Only tiny pieces and certain fragments with complementary "chaparones" of the food we eat are molecular fragments that are absorbed. A number of gastrointestinal conditions are caused by an imbalance in the gut's capacity to absorb nutrients. One condition where iron is not effectively absorbed is Cooly's anemia. Iron deficiency affects Cooly's anemia patients, even if their stomachs digest food correctly and they have normal iron absorption. Catabolism is the process of dissolving big molecules into smaller ones. Catabolism releases energy by rupturing bonds. Anabolism creates new connections and needs energy to function. Catabolic reactions (destructive or biosynthetic process) breaks down large molecules and release energy
using oil immersion is useful because
Using immersion oil is useful as it acts as an interface between the blade and the front lens of the objective, improving the quality of the visualized image.
What is immersion oil for?Immersion oil is a resource generally used with the objective of greater magnification, its function is to act as an interface between the blade and the front lens of the objective, improving the quality of the visualized image.
With this information, we can conclude that using immersion oil is useful as it acts as an interface between the blade and the front lens of the objective, improving the quality of the visualized image.
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Why is scientific knowledge more reliable than other types of knowledge?
A. Because false hypotheses are discarded, and results are peer reviewed by other experts to ensure accuracy.
B. Science is not more reliable.
C. Because science only uses facts that are proven 100% true through the use of variables.
D. Because scientists are more reliable than other people.
Answer:
C
Explanation:
Everything around us is all about science...We practice them everyday...All thanks to the scientists after so much examines,they let us know more about many things we don't know much about,they worked on them and improve them so that we can live a convenient life.
Which type of electromagnetic wave has more energy than a wave of
visible light with the same amplitude?
O x-ray
Microwave
Radio wave
Infrared light
Mutations are random changes to the structure of a gene. the likelihood of a mutation occurring can increase if a cell is
when mutations in a gene alter the sequence of amino acids,
can be
altered.
reset
next
Mutations are random changes to the structure of a gene. the likelihood of a mutation occurring can increase if a cell is when mutations in a gene alter the sequence of amino acids, can be altered.
What occurs whilst a random mutation occurs?What is generally known as "random mutation" does now no longer in truth arise in a mathematically random pattern. The procedure of genetic mutation is extraordinarily complex, with more than one pathways, concerning multiple systems. Current studies indicates maximum spontaneous mutations arise as mistakes withinside the restore procedure for broken DNA.
These outside sellers of genetic alternatives are known as mutagens. Exposure to mutagens frequently reasons changes withinside the molecular shape of nucleotides, in the long run inflicting substitutions, insertions, and deletions withinside the DNA sequence.
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Imagine that you are preparing to do an experiment in the location pictured below. To prepare for your experiment, you need to gather some data about the location. What are two pieces of qualitative data that you will collect about this location? What are two pieces of quantitative data that you will collect about this location? Be sure to distinguish which data is qualitative and which is quantitative.
Answer:
1. The deepest seas were formed at the break of tectonic plates, such as the Mediterranean.
2. Each sea has a different salinity.
which component is released from the active site of an enzyme during a chemical reaction ?
Answer:
The Product
Explanation:
In a chemical reaction the enzyme plays an important role in catalyzing the reaction.
The enzyme has an active site on its structure to which a substrate can come and bind. The active site has a specific shape to which the substrate of complementary shape can come and bind. once the substrate is bound to the active site of the enzyme the reaction takes place and a product is formed. Once the product is formed, product is released from the active site and enzyme remains unchanged at the end of the reaction.
therefore answer is product that is released from the active site
What stimulates the secretion of parathyroid hormone from the parathyroid gland?.
Answer:
Low calcium levels in the blood
Explanation:
In primary hyperparathyroidism, one or more of the parathyroid glands is overactive. As a result, the gland makes too much parathyroid hormone (PTH). Too much PTH causes calcium levels in your blood to rise too high, which can lead to health problems such as bone thinning and kidney stones. this will happen if parathyroid hormones got high in human body..
Answer:
Low blood calcium
Explanation:
What are enzymes and how were they discovered?
Un-paraphrased (WILL BE DETECTED BY PLAGIRISM CHECKERS):
By the late 17th and early 18th centuries, the digestion of meat by stomach secretions and the conversion of starch to sugars by plant extracts and saliva were known but the mechanisms by which these occurred had not been identified. French chemist Anselme Payen was the first to discover an enzyme, diastase, in 1833.
Paraphrased (YOU ARE GOOD TO USE THIS, YOU WONT BE PLAGIRISED)
The digestion of meat by stomach secretions and the conversion of starch to sugars by plant extracts and saliva were known by the late 17th and early 18th centuries, but the mechanisms by which these occurred had not been identified. Anselme Payen, a French chemist, was the first to discover an enzyme, diastase, in 1833.
suggest why a plant cell in 0.10 mol dm salt solution will not burst
Answer:
So, the correct answer is 'Cells wall is rigid and does not get overstretched'
The processes of meiosis and fertilization help ensure the survival of the
species by providing each generation with the same number of - *
chromosomes
body cells (somatic)
gametes (sex cells)
offspring
Answer:
providing same number of chromosomes
Explanation:
each gamete has similar number of chromosomes which when fused during fertilization provide the same number of chromosomes
if an insect eats the lettuce seedlings in your yard, it is acting most like a(n):
If an insect eats the lettuce seedlings in your yard, it is acting like an herbivore.
What is an herbivore?An herbivore is an organism that obtains its energy and nutrients to survive by eating plants.
Herbivores are fundamental in the food web and help to control the number of primary producers in the ecosystem.
In conclusion, If an insect eats the lettuce seedlings in your yard, it is acting like an herbivore.
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Homeostasis refers to:
Answer:
A stable condition
Explanation:
Dictionary Definition- a tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes
Answer:
A Stable Condition
What is Homeostasis?
The tendency of a system, especially the physiological system of higher animals, to maintain internal stability, owing to the coordinated response of its parts to any situation or stimulus that would tend to disturb its normal condition or function.
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When you are exposed to bright light, cells in the retina detect the stimulus and send it to the brain for processing. The brain commands the iris to constrict and decrease pupil size. Which structure serves as a receptor in this system
When you are exposed to bright light, cells in the retina detect the stimulus and send it to the brain for processing. The brain commands the iris to constrict and decrease pupil size.
The structure that serves as a receptor in this system is Retina
How can we see the object?Organisms adapted and evolved the eyes to see the surrounding environment. This ability to see begins when the visible wavelength of light enters the eye through a transparent covering called Cornea. The light enters the cornea and enters the inner of the eye through a round hole known as the pupil.
The light rays then enter the convex-shaped lens in the eye which focuses the beam of light on the back of the eye in the region of the tissue called the retina. The retina contains the photoreceptor cells-rods and cones in which the cone cells have the ability to detect three wavelengths of light especially blue, green and red which help us see various versions of the colour.
These cells convert light energy to chemical energy in the form of the action potential which gets transmitted to the part of the brain associated with the vision. This completes the pathway of the vision.
Thus, Retina is the answer.
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Thapsigargin is a potent calcium atpase pump inhibitors. What state of the myogram would be affected immediately?
The fact that Thapsigargin is a potent calcium atpase pump inhibitor means that the phase that will see immediate effects is the Relaxation period.
Why does the Relaxation period get immediately affected?Calcium ATPase pumps help the muscles to relax after contraction which means that Thapsigargin prevents this from happening.
It's effect will therefore be immediately felt in the relaxation period as muscles will be unable to relax.
Options for this question are:
a. Latent period
b. Contraction period
c. Relaxation period
d. All myogram stages are affected
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