The endocardium covers the heart valves and it is these valves that are primarily affected by infective endocarditis. If an infection is left untreated, bacteria can grow and eventually destroy the valve, leading to heart failure.
Three layers of tissue make up the wall of the heart. The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium.
The endocardium is the innermost layer of the heart, lining the ventricles and covering protruding structures such as the heart valves, chordae tendineae, and papillary muscles. Endocardial cells are developmentally and biologically similar to the endothelial cells that line blood vessels. The endocardium protects the valves and heart chambers as well.
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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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Are these correct? And can you finish them?
Answer: Yes and here are the rest in order: Ozone layer, oxygen, nitrogen, water, ice, planet, and moon
Explanation:
Answer: Seems good
Explanation: Ozone layer, Oxygen and Nitrogen, Water, Ice, Planet, Moon
1. The carrying capacity for a population of deer in a forest is 300 individuals.
Which of the following is true?
A population of 300 deer will remain at about 300
A population of 100 deer will remain at about 100
A population of 500 deer will continue to grow exponentially
A population 300 deer will run out of resources and crash
The organisms found in a coral reef habitat include clownfish, seahorses, and sea grass.
2. Which of the following terms best describes these organisms?
community
biome
species
population
3.Which of these is an abiotic factor in a tundra ecosystem?
amount of sunlight
trophic levels
species richness
vegetation
Answer:
1. A population of 300 deer will remain at about 300
2. community
3. amount of sunlight
Explanation:
1. Carrying capacity is defined as the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available. Therefore if a population has reached its carrying capacity, it will most likely remain at that size.
2. A community is defined as all of the populations of different species that live in the same area and interact with one another. Clownfish, seahorses, and sea grass are all different species living in an area together and interacting with each other. This example does not show a population, nor a species, nor biome, since a population is a group of organisms of the same species, and a biome is a distinct biological community that has formed in reponse to a shared physical climate.
3. Abiotic factors are non-living factors which affect an ecosystem.
what is an inex fossil
Answer:
Explanation:
An index fossil is used for learning the age of geological periods.
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Why was penicillin considered a miracle drug?
A. It is made from mold.
B. It cures deadly diseases.
C. It prevents bacterial infections.
D. It was discovered during World War I.
Hi they
B is answer
why? well because when they discover it this changes the world. this drug helped with infections or bacterial and more.
A group of sheep run in random directions to confuse a single predator. This is an example of which social behavior?
O migrating
O herding
O schooling
•
cooperative hunting
Answer:
D). Cooperative hunting
Explanation:
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Which fundamental principle surrounding enzymes explains why transition state analogues are able to act as potent inhibitors of naturally occurring enzymes
A fundamental principle surrounding enzymes is that they can only catalyze reactions if the substrate binds to a specific site on the enzyme. This site is known as the active site.
The active site of an enzyme is a highly specific region that contains amino acid residues that interact with the substrate. These residues form a complementary shape that is specifically tailored to bind to the substrate. This binding of the substrate to the active site is what allows the enzyme to catalyze the reaction.
The transition state of a reaction is the energy state of the molecules just before the products of the reaction are formed. Transition state analogues are molecules that are designed to mimic this transition state and can be used to inhibit the enzyme.
Due to their similarity to the transition state of the reaction, the transition state analogues bind to the active site of the enzyme. This binding is strong and tight, preventing the natural substrate from binding. Therefore, the enzyme is unable to catalyze the reaction and is inhibited.
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Sickle disease cell is a recessive genetic disorder. How many copies of the mutated gene (HbS allele) do you need to develop full blown sickle cell anemia?Please explain as well
If a bot gets first, Ill give the person who gives a correct answer 30 points and brainliest.
Answer:
It takes two copies of the mutant gene.
Explanation:
One from each parent, to give somebody the all-out sickness. Numerous individuals have only one duplicate, the other being typical.
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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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What could occur if the feedback loop of the knee reflex was cut off at any point along its path?
This is an illustration of a reflex, which is an uncontrollable muscle reaction brought on by the tap of a rubber hammer on a tendon.
What is a feedback loop?
The absence of reflex reactions may indicate injury to the spinal cord, a nerve root, a peripheral nerve, or a muscle.
Two positive feedback loops are involved in the defecation reflex. These loops are the stretch receptors in the sacral parasympathetic system and the rectal walls.
Therefore, a reflex is an uncontrollable muscle reaction brought on by the tap of a rubber hammer on a tendon.
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ayuda porfavor es para hoy :(
Answer:
B
Explanation:
si mi pensamiento es correcto, sería B. porque tienes las masas de las moléculas y esas se quedan con el símbolo periódico para ellas.
Position A represents the position of the sun at another time of day during month Z. What is the time of day when the sun is at position?
Answer:
Position of the Sun. On Monday, September 16, 2019 at 02:30:00 UTC the Sun is at its zenith at Latitude: 2° 48' North, Longitude: 141° 16' East. The ground speed is currently 463.40 meters/second, 1668.2 kilometres/hour, 1036.6 miles/hour or 900.8 nautical miles/hour (knots).
Explanation:
The time of the day is 1 p.m when sun is at position A.
What is the distance between earth and sun?As noted earlier, Earth's average distance to the Sun is about 93 million miles (150 million kilometers) from the Sun.
Position of the Sun. On Monday, September 16, 2019 at 02:30:00 UTC the Sun is at its zenith at Latitude: 2° 48' North, Longitude: 141° 16' East. The ground speed is currently 463.40 meters/second, 1668.2 kilometres/hour, 1036.6 miles/hour or 900.8 nautical miles/hour.
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how many body openings do comb jellyfish have A 0 B 1 C 2 D3
Answer:
C 2
Explanation:
They have two (2) holes. While true jellies have a sealed bell with only one opening (like the one opening of an anemone), comb jellies have a small opening at the top of their body and one at the bottom so that water can flow through them. - They often have plates for protection on the outside of their bodies.
How do limiting factors change the carrying capacity?
7th grade
How is it beneficial to living things[ humans, animals, plants, etc] and the environment?
Answer:
ost plants and animals live in areas with very specific climate conditions, such as temperature and rainfall patterns, that enable them to thrive. Any change in the climate of an area can affect the plants and animals living there, as well as the makeup of the entire ecosystem. Some species are already responding to a warmer climate by moving to cooler locations. For example, some North American animals and plants are moving farther north or to higher elevations to find suitable places to live. Climate change also alters the life cycles of plants and animals. For example, as temperatures get warmer, many plants are starting to grow and bloom earlier in the spring and survive longer into the fall. Some animals are waking from hibernation sooner or migrating at different times, too.
Explanation:
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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 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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54. Using mechanical friction when prepping will not aid in: a. Removal of resident bacteria b. Removal of dirt and oil c. The effectiveness of antimicrobials d. Removal of transient bacteria
Using mechanical friction when prepping will not aid in: a. Removal of resident bacteria.
Friction is described because the resistance to movement because of sliding, and all equipment devour frictional strength due to the fact their components slide in opposition to one another. Lubrication can manipulate friction in a number of those times however very often, including in engines, maximum mechanical strength is misplaced through shearing liquid lubricant films. In mechanical structures including inner combustion engines, the time period refers back to the electricity misplaced in overcoming the friction among transferring surfaces. Frictional forces, such as the traction needed to walk without slipping, may be beneficial, but they also present a great measure of opposition to motion.
Thus, option a is the correct choice.
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What is the role of carbon dioxide exchange with the ocean?
The role of carbon dioxide exchange with the ocean is A lot of the carbon dioxide that is released when fossil fuels are burned is taken up by the ocean.
Ocean acidification is the process by which this additional carbon dioxide is lowering the pH of the ocean.
The carbon cycle is significantly influenced by human activities. Changes in land use, the burning of fossil fuels, and the use of limestone in concrete all contribute significantly to the emission of carbon into the atmosphere. Marine organisms, such as corals, Dungeness crabs, and snails, are unable to construct their shells and skeletons due to ocean acidification.
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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.Which of the following is an important step in the preparation of a proper bacterial smear?
a. Allow the loop to cool after it has been flamed.
b. Label the underside of the slide (the downward-facing side of the slide) with the type of microbe you will be transferring.
c. Repeat inoculations such that the smear is as thick and undiluted as possible.
d. Apply methane to clean the slide prior to smearing inoculum.
Allow the loop to cool after it has been flamed is an important step in the preparation of a proper bacterial smear
A bacterial smear is a small layer of bacteria that is deposited on a slide or a tray for staining. The bacteria are fixed on the slide, and this stops the bacterial sample from being washed away during staining. A crucial step in creating a healthy bacterial smear is allowing the loop to cool after burning.
This is due to the fact that blazing the loop sterilises it by eliminating any bacteria that may be present on the loop, but if the loop is still hot when a sample is taken, the bacteria may be "fried" rather than collected. For effective identification and analysis, it is crucial that the bacteria are gathered in their natural state, which is ensured by allowing the loop to cool.
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What keeps the temperatures on the Pacific Coast relatively moderate year-round?
A. the clouds hanging over the coast
B. the direct sunlight received all year
C. the large population of California
D. the ocean currents
Answer:
Ocean Currents
Explanation:
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
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In your own words, why is biodiversity important? Please provide at least one example.
Answer:
Biodiversity is important to humans for a lot a reasons such as life support provides dmfunctioning ecosystems that supply oxygen clean air and water.
if all animals are the same size, shape, color and in the same place they can be more susceptible to extinction with just one event like with big dinosaurs and a asteroid hitting the earth
if anyone could complete this timeline in order, left to right, that'd be much appreciated :)
Explanation:
if anyone could complete this timeline in order, left to right, that'd be much appreciated :)
hope it is helpful to you
All fungi are considered Group of answer choices auto/heterotrophs, cell wall made of peptidoglycan, prokaryotic heterotrophs, to have cell walls made of chitin, eukaryotic autotrophs/heterotrophs, cell wall made of psuedomurien, prokaryotic autotrophs, cell wall made of cellulose, eukaryotic
Answer:
to have cell walls made of chitineukaryotic heterotrophsExplanation:
Domains are the highest taxonomic category in which living beings can be grouped or divided. There are three domains: archaea, bacteria, and eukarya.
The eukarya domain is composed of the Protist, Fungi, Plantae, and Animalia kingdoms.
Kingdoms include different phyla closely related.
The Fungi kingdom includes yeasts, molds, and mushrooms. All of them are characterized by the same general aspects.
All the members of the kingdom
Lack mobility, growing on the ground, organic matter, or other surfaces. They all have a rigid cell wall composed of chitin. They grow like hyphae, which are cylindrical uniformed structures that might reach many centimeters in length. Heterotrophic nutrition. The species can not produce their own food, so they decompose organic matter and get the nutrients from there. Reproduction is by spores, which are resistant to adverse environmental conditions.Why can't calico cats reproduce?
Answer:
How do calicos reproduce? Due to their unique genetic makeup (and the fact that male calico cats are born sterile), calico cats cannot actually be bred. Rather, nature produces these colorful kitties randomly.
Explanation:
arrange the constititual ideas in the order in which they appear in the U.S Constituation
Answer:
The Constitution is divided into seven articles on different topics. Each article is further divided into sections
Explanation:
Article I deals with the legislative branch of government
Article II concerns the executive branch of government
Article III establishes the Supreme Court as the highest judicial power in the United States
Article IV defines the relationship between the states
Article V describes the procedure for amending the Constitution
Article VI declares itself, the Constitution, as "the supreme Law of the Land"
Article VII ratifies the Constitution
What are the 3 factors of natural selection?
The core of Darwin's thesis is that if three criteria are met, natural selection will take place. Factors: The battle for existence, variety, and inheritance is represented by the circumstances highlighted in bold above.
Most attributes are inherited, more offspring are generated than can survive, and offspring with more attractive traits will survive and have more offspring than those with less favorable traits. These three principles result in natural selection, which is an unavoidable process.
More environment-adapted organisms are more likely to survive and pass on the genes that contributed to their success. Over time, species change and diverge as a result of this process. One method of accounting is natural selection.
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