Answer:
A
Explanation:
In cardiac muscle, the fast depolarization phase of the action potential is the result of
A) decreased membrane permeability to calcium ions.
B) increased membrane permeability to chloride ions.
C) increased membrane permeability to potassium ions.
D) decreased membrane permeability to sodium ions.
E) increased membrane permeability to sodium ions.
E) The increased membrane permeability to sodium ions causes the fast depolarization phase of the action potential in cardiac muscle.
In cardiac muscle cells, what causes the action potential's rapid depolarization phase?An opening of fast sodium channels initiates the depolarization phase of the action potential in muscle and nerve cells. This also occurs in cardiac cells that do not have pacing devices; However, the initial depolarization phase of the action potential is influenced by calcium ions in cardiac pacemaker cells.
What takes place during cardiac muscle depolarization?An electrocardiogram (EKG) is an indirect indicator of heart muscle contraction because contraction of the heart muscles is caused by depolarization of the heart. Without any external stimulus, the heart's cells will depolarize. Automaticity, or autorhythmicity, is the name given to this property of cardiac muscle tissue.
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Which of the following is the best source of
scientific data?
A. Magazine
B. Scientific journal
C. Newspaper
D. Radio
Answer:
Scientific journal B:
Explanation:
HOPE IT'LL HELPS!!
What two “parts” does a cell build ATP from?
Answer:
Explanation:
. The two ATP-producing processes can be viewed as glycolysis (the anaerobic part) followed by aerobic respiration
What is the process in prophase I that has caused genetic material exchange to take place?
Chromosome crossover is the mechanism by which homologous chromosomes couple up and exchange genetic material during prophase I.
Leptotene, zygotene, pachytene, diplotene, and diakinesis make up prophase I's five stages. Several significant activities, including as the pairing of homologous chromosomes and the reciprocal exchange of genetic material between these homologous chromosomes, take place during these stages in addition to those that take place in mitotic prophase. Prophase I progresses at varying rates according on sex and species.
Until ovulation, several species halt meiosis in the diplotene of prophase I. In humans, oocytes can be stopped in prophase I for decades before swiftly completing meiosis I just before ovulation.
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What are the 4 common characteristics used to describe bacterial colonies?
The 4 common characteristics that are used to describe bacterial colonies are shape, size, color and texture.
Bacterial colonies are basically group of bacteria which have originated from the same mother cell and have divided repeatedly. The morphological characteristics of a colony are basically the visual characteristics by which we can distinguish between different bacterial colonies.
The first most common characteristic is the shape. The shape includes form of the bacteria which can be circular, filamentous etc. and also margin which can be undulate, irregular etc. The second characteristic is the color which indicated whether the colony is transparent, opaque or pigmented. The third characteristic is size which can be large, medium, small or pinpoint. And finally there's texture or the surface appearance which means if the colony is smooth, rough, wrinkled, dull etc.
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Snow leopards are very rare because they occupy what level of the food chain
Answer:
One big reason that snow leopards are endangered is because of poaching. Poachers illegally kill snow leopards, even though they are endangered, and sell the animals for money. The snow leopard's thick, white fur is highly sought after to make fur clothing.
Explanation:
hope this helps
Answer: One big reason that snow leopards are endangered is because of poaching. Poachers illegally kill snow leopards, even though they are endangered, and sell the animals for money. The snow leopard's thick, white fur is highly sought after to make fur clothing.
Explanation:
Phoebe and Jahiem are working together on an assignment on types of reproduction. They read an article about seedless orange trees. Farmers cut parts of the tree and plant them in the garden to make new trees. Jahiem and Phoebe made the following predictions: Phoebe: I think these trees reproduce asexually and rely on mitosis as there are no seeds to plant. So I predict that all orange trees will be genetically identical to each other and the parents. Jahiem: I think these trees reproduce sexually and depend on meiosis. Plants are multicellular organisms and all multicellular organisms reproduce through meiosis. So I predict that all orange trees will be genetically different from each other and the parents.
Determine who you agree with and explain your reasoning. Be sure to include at least two proofs in your explanation.
HEEEEEELP
Answer:
Technically, both are correct, but I would go with Jahiem.
Explanation:
In terms of how orange trees are normally produced, they usually reproduce asexually, but farmers will graft parts of trees to create new ones. But, normaly trees reproduce sexually.
Write down: An orange tree in the wild is not genetically similar to the one next to it
I agree with Phoebe that orange trees will be genetically identical to each other.
Predictions of PhoebeI think these trees reproduce rely on mitosis as there are no seeds to plant. So I predict that all orange trees will be genetically identical to each other and to their parents.
What are reproduction plants?In reproduction, the plant does not need another gamete to reproduce. For this type of reproduction, parts of the plant are removed to obtain new plants, which is known as a clone. Therefore, what is really used in this type of reproduction is the genetic material of the plant.
Whit this information, we can conclude that i agree with Phoebe that orange trees will be genetically identical to each other.
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How is scale type related to diversity
Answer:
Usually three levels of biodiversity are discussed—genetic, species, and ecosystem diversity. Genetic diversity is all the different genes contained in all individual plants, animals, fungi, and microorganisms. It occurs within a species as well as between species. Ecological diversity
Ecological diversity is the largest scale of biodiversity, and within each ecosystem, there is a great deal of both species and genetic diversity. Species diversity is determined not only by the number of species within a biological community—i.e., species richness—but also by the relative abundance of individuals in that community. … Two communities may be equally rich in species but differ in relative abundance At regional scales, diversity is also increased by speciation and decreased by extinction. These decreases in diversity include those caused by regional extinction events that extirpate species from the region in question but not necessarily from all other regions.Four Types of Biodiversity
Species Diversity. Every ecosystem contains a unique collection of species, all interacting with each other. ...
Genetic Diversity. Genetic diversity describes how closely related the members of one species are in a given ecosystem. ...
Ecosystem Diversity. ...
Functional Diversity.
Explanation:
Select the statements that describe brain injuries.Brain injuries only affect the brain.
Brain injuries can occur when the brain’s oxygen or glucose supply is interrupted.
Brain injuries can only be caused by physical trauma.
Brain injuries can be caused by infection or intoxication.
Option B, C. Brain injuries can be caused by both physical trauma and non-physical causes such as infection or intoxication.
Physical trauma to the head, such as a blow or a jolt, can cause a brain injury. Examples of traumatic brain injuries include concussions, contusions, and skull fractures. These injuries can result from falls, car accidents, sports injuries, or other types of accidents. In addition to physical trauma, brain injuries can also be caused by non-physical factors such as infection or intoxication. Infections such as meningitis and encephalitis can cause inflammation and swelling in the brain, leading to brain injury. Intoxication from alcohol or drugs can also cause brain injury by affecting the brain's ability to function properly. It's important to note that brain injuries can also be caused by a combination of physical trauma and non-physical factors. For example, a person who suffers a traumatic brain injury may also develop an infection or become intoxicated, which can further complicate their recovery.
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In chemistry, the elements are *
a. Pure chemical substances containing only one type of atom
b. Pure chemical substances containing two or more different types of atoms
c. Substances which can be burnt in the presence of air
d. Substances that do not react with other substances
Approximately how many plant made pharmaceuticals are currently under different stages of discovery?
a.
100
b.
200
c.
300
d.
400
T or F The study of orthologs would be useful to determine the function of a specific gene in a species.
Answer:
True
explaination non
Explain how energy from the sun can eventually be used for active transport in the alimentary canal
Answer:
The chemical energy is locked up as carbohydrate in the green plants. ... The locked-up energy - usually in the form of ATP - becomes available to be used for various metabolic processes in the body, including active transport in the alimentary canal.
Explanation:
Which energy is use is to active transprt
ATP energy
Hope it help!!
What causes genetic variation in a population environmental changes?
Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation in a population environmental changes.
Gene flow, or the transfer of genes between several groups of organisms, is another source. The development of new gene combinations through sexual reproduction can also result in genetic variety.
Genetic variation is the variance in DNA sequences among members of a population. Germ cells, such as sperm and eggs, as well as somatic (all other) cells, are subject to variation.
Gene variants, sometimes known as mutations, can cause genetic differences, or a normal process in which genetic information is rearranged as a cell prepares to divide can also cause genetic variations (known as genetic recombination). Different phenotypes can be introduced into an organism by genetic changes that change gene activity or protein function.
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In most cases, the two major climatic factors affecting the distribution of organisms in terrestrial ecosystems are __________. In most cases, the two major climatic factors affecting the distribution of organisms in terrestrial ecosystems are __________. temperature and sunlight predators and parasites competitors and predators precipitation and temperature wind and precipitation
Answer:
precipitation and temperature
Explanation:
Temperature and water are considered major abiotic factors that affect species distribution in terrestrial ecosystems. The temperature can affect the distribution of terrestrial organisms due to many species maintain a constant internal temperature, while other species maintain a body temperature range that may be very different from the environmental temperature, and therefore they will not be able to carry out their metabolic functions. Hibernation is an adaptation that allows some terrestrial animals to escape temperature fluctuations. Moreover, water is another limiting factor for life, since water is critical for cellular processes. The waxy cuticle is an adaptation that allows terrestrial plants to avoid excessive water loss through transpiration.
I think I've finally figured out the problem with anti-vaccer's
Answer:
Wow. They're both right... I still think Vaccines aren't healthy.
Explanation:
What 6 things do bacteria need to grow and survive?
The six things which bacteria need in order to grow and survive are food, time, temperature, acidity, oxygen and moisture.
Bacteria are basically single-celled microorganisms which are able to live and survive in a wide range of conditions. Bacteria are found almost everywhere in the environment including inside our own bodies.
Bacteria require six basic conditions in order to survive which include food, time, temperature, acidity, oxygen and moisture. Food or nutrition supply allows bacteria to grow. Bacteria multiply in number by dividing over time.
Different types of bacteria need different temperatures to grow. Most bacteria are able to thrive in low acidity or neutral environments but there also a lot of bacterial types which can survive in a wide range of pH. Some bacteria are able to thrive in the absence of oxygen while some type of bacteria require oxygen in order to grow. Moisture also boosts bacterial growth.
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What is a summary of the nitrogen cycle?
Which of the following genotypes would most likely lead to a low birth weight and a small placenta?
A. Igf2+/Igf2- where the mutated Igf2- allele comes from the paternal source.
B. Igf2+/Igf2- and it doesn't matter which parental source the mutated Igf2- comes from.
C. Igf2+/Igf2- but only in female progeny as the Igf2 gene is on the X-chromosome.
D. Igf2+/Igf2+ where neither maternal nor paternal allele is mutated.
E. Igf2+/Igf2- where the mutated Igf2- allele comes from the maternal source.
Igf2+/Igf2-, a genetic condition in which the mutated Igf2-allele is inherited from the father. B. Igf2+/Igf2-, and the parent from whence the mutant Igf2- comes is unimportant.
Whatever happens to a placental after delivery?
The placenta usually breaks from the uterine lining after childbirth. The placenta may still be partially or entirely attached to the uterus when there is placental accreta. This condition happens when the blood vessels and other parts of the placenta encroach too deeply into the uterine lining.
What benefits may you expect if you eat your placenta?
Despite suggestions that eating the placenta can reduce postpartum hemorrhage, increase mood and energy, increase milk production, and provide essential micronutrients like iron, there is no evidence to support any health benefits. You can suffer from placentophagy.
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Which of the following accurately describes a
biome?
O A. A group of individuals of the same species
that live in a particular geographic region
and compete for resources
B. A group of plant species that live in a
particular geographic region and compete
for resources
C. A group of ecosystems that are near one
another and have similar climates but do
not interact
D. A group of populations that live in the same
area but do not compete for the same
resources
Answer:
The answer is A.
Explanation:
(This definition I got from the web so credits to them)
A biome is an area classified according to the species that live in that location. Temperature range, soil type, and the amount of light and water are unique to a particular place and form the niches for specific species allowing scientists to define the biome.
when you swallow, food, water, and other liquids move into the ____, a hollow tube that connects the mouth to the stomach
What is the passing of genes from parents to children called?
The passing of genes from parents to children is called heredity.
Inheritance, also called heredity or biological inheritance, is the passing of traits from parents to offspring. Through either asexual or sexual reproduction, progeny cells or organisms acquire the parent's genetic information. Heredity refers to the genetic heritage inherited from our biological parents. More precisely, it is the transference of traits from one generation to the consequent. These traits can be physical, such as eye color, blood type, disease, or behavioral.
In humans, eye color is an example of a genetic trait or Heredity.
A person can inherit the "brown-eyed feature" from either parent. Inherited traits are controlled by genes, and the complete set of genes in an organism's genome is called its genotype.
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Sewage that end up in waterway can increae algae growth becaue it
A. Kill plant
B. Provide nutrient
C. Ue oxygen
D. Attract bird
Sewage that ends up in waterway can increase algae growth because it B. Provides nutrients.
Algae growth in waterbodies is aided by the nutrients phosphorus and nitrogen, which are necessary for algae production.
Eutrophication is the process that leads to harmful algal blooms, dead zones, and fish kills. Eutrophication begins with an increase in the amount of nutrients that reach estuaries and coastal waters. An overabundance of algae and plants initiates a chain reaction in the ecosystem as a result of eutrophication. The excessive plant and algae matter eventually breaks down, releasing a lot of carbon dioxide.
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What type of mutation has occurred in the following example?
Original DNA Sequence ATC GGC TAG GCA
Mutated DNA Sequence
ATC AGG CTA GGC
A) deletion mutation
B) germ-cell mutation
C) insertion mutation
Explanation:
What type of mutation has occurred in the following example?
Original DNA Sequence ATC GGC TAG GCA
Mutated DNA Sequence
ATC AGG CTA GGC
A) deletion mutation
Please answer I really need help
Answer:
The answers to the blank spaces are numbered as follows:
1. Function
2. Nucleus
3. Mitochondria
4. ATP
5. Chloroplast
6. Glucose
7. Ribosomes
Explanation:
This question is describing the organelles found in a cell. An organelle is a structure that performs a specific FUNCTION (1) in a cell. There are different kinds of organelles with each possessing its own peculiar function. Some of them are as follows:
- NUCLEUS, which is regarded as the brain of a cell because it directs or controls a cell's activities just like the brain of an organism does.
- MITOCHONDRIA is an organelle that produces the energy storing compound called ATP (adenosine triphosphate), hence, it is called power house of the cell.
- CHLOROPLAST is an organelle found in plant cells that functions in the conversion of light energy (from sun) into GLUCOSE (chemical energy) in a process called PHOTOSYNTHESIS.
- RIBOSOMES is an organelle found in both prokaryotic and eukaryotic cells that serves as the site of PROTEIN production in a cell.
Gayla measured the temperature of two identical cups of water over three hours. One cup was kept in a dark cupboard. The other cup was kept under a lamp. Her data is shown in the table below.
Temperature of Water Over Time
Time
Passed Temperature of Water
In the Dark Under a Lamp
start 25°C 25°C
one hour 25°C 35°C
two hours 25°C 45°C
three hours 25°C 55°C
A good scientific explanation uses both the data and an interpretation of the data.
Which of the following is the best explanation for the results of this experiment?
A.
The light shining on the water was changed into heat energy, which increased the temperature of the water.
B.
The temperature of the water under the lamp increased, but the temperature of the water in the dark did not.
C.
The light energy turned into sound energy, which raised the temperature of the water.
D.
The temperature of the water increased because the air conditioner in the room was off.
Answer:
A: The light shining on the water was changed into heat energy, which increased the temperature of the water.
Explanation:
__________________________________________________
The best explanation for the results of Gayla's experiment is that the light shining on the water was changed into heat energy which increased the temperature of the water.
This explanation is not only based on the fact that the temperature of the water under the lamp increased and the temperature of the water in the dark did not, but it also explains how the light energy that came from the lamp changed into heat energy and warmed the water.
Which of the following is NOT a characteristic of ATP?*
ATP belongs to a group of chemicals called nucleic acids
O ATP is an organic molecule
O ATP has a phosphate group in its structure
O ATP is made from the breakdown of proteins
Answer:
ATP is made from the breakdown of proteins
Explanation:
Is co2 essential for photosynthesis,name two ways the validity of this investigation can be ensured
Answer:
Insert a part of the leaf of a destarched plant into a conical flask containing potassium hydroxide. Potassium hydroxide solution absorbs the carbon dioxide gas from the air present in the glass bottle. Leave the plant sunlight. After few hours, perform a starch test to this and another leaf of the same plant.
Conclusion: In this experiment, we can conclude that carbon dioxide is essential for photosynthesis. Both the portion of leaf received the same amount of water, chloroplasts, and sunlight but the half part which was inside the glass bottle did not receive carbon dioxide.
Answer:
Carbon dioxide is essential for the plants to sustain, as it is the carbon fixed from the carbon dioxide during photosynthesis is used for synthesizing glucose. This glucose is then later used during cellular respiration to make ATP, the energy molecule. It is also used by plants as a vital source of carbon to produce a major part of the plant mass.
The importance of carbon dioxide for plants can be proved by a small experiment:
Take two healthy potted plants. Keep them in dark for 2-3 days, so that all the carbon dioxide fixed till that gt used up by the plant. Take the plants and keep both in two separate closed bell jar containers that are air-tight. In one of the jar, keep an open beaker containing potassium hydroxide (KOH) solution along with the plant. KOH can absorb carbon dioxide, so the jar containing KOH is devoid of carbon dioxide. Keep both the jars in sunlight for 4 hours. Pluck the leaves from plants in both jars and remove chlorophyll by boiling in ethanol. Apply iodine solution over the leaves. The leaves of the plant present in the jar without KOH solution turns blue-black color, as the starch in the leaves reacts with iodine. But, the leaves of the plant in the jar with KOH does not change color as in the absence of carbon dioxide the plant cannot produce starch.Explain the application of biology epecially the role of microbilogy and biotechnology for the growing public and global health need
A, in the development of effective diagnotic ,prevention and treatment meaure including production of novel drug and recombnant vaccine
B, in the production of nutritionally enriched genetically modified crop and animal to alloviate food inecurity which i a common dilemma particularly in underdeveloped countrie
Biotechnology is the application of biology to the creation of new things, processes, and creatures with the goal of enhancing society and human health.
A. Medical biotechnology is a subspecialty of medicine that conducts research on living cells and cell components before creating pharmacological and diagnostic products. These goods aid in both disease treatment and prevention. Modern diagnostic and preventative medical devices, such as diagnostic test kits, vaccinations, and radio-labeled biological treatments used for imaging and analysis, have been made possible by advances in biotechnology.
B. By improving crop quality and in some cases productivity, biotech crops can boost farming's profitability. Some of these crops can make work easier and increase farmer safety. As a result, farmers may focus more of their time on other lucrative activities and spend less time cultivating their crops.
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Can someone help me in this
Answer:
I can't see the whole question