Answer:
This is in order to maintain the species number of chromosomes.
Explanation:
Reduction division occurs by meiosis and it is very necessary in organisms that reproduce sexually.
Meiosis will take place in the ovary and testis to produce haploid gametes that have half the number of chromosomes compared to the parent cell .
During fertilization the two gametes will fuse to form the offspring an offspring with the same number of chromosomes as the parent. The species number of chromosome has been maintained.
Without meiosis or reduction division the off-springs would have double the chromosomes as the previous generation did.
Explain why most species with a high capacity for population growth tend to have small individuals, while those with a low capacity for population growth
Dna damage can occur as a result of exposure to chemicals or ultraviolet radiation. what happens during nucleotide excision repair of damaged dna?
Which of the following best describes the characteristics of less fertile soils, increase in disease-carrying mosquitoes, and flooding of homes and villages? effects of dams on society effects of a decreasing beaver population effects of agricultural farming effects of density-dependent factors
The correct answer is:
A. effects of dams on society
Explanation:
The exchange of a river's flow and sediment conveyor downstream of a dam often causes the greatest sustained environmental impacts. Yet even complex changes in the number and timing of water flows impact aquatic and riparian life, which can explain the biological web of a river system.
When the body begins to need a particular drug in order to function normally, it is called?
what strategies/ideas can we pose to promote the effective use and conservation of energy
Although the incubation period for chickenpox is about 21 days, it is during the _____ days before the rash develops that the newly infected host is capable of transmitting the virus to other susceptible contacts.
Why is there a delay between the ecg pattern and the resulting beat of the heart?
There would be a delay between the ECG pattern and the resulting beat of the heart because it takes time for the pulse to travel from the systole (ventricular contraction) to the radial artery. Pulse cannot be felt in the finger. It can be felt with a pulse oxymeter.
The delay between the ECG pattern and the resulting beat of the heart occurs at the atrioventricular node (AV node). This delay allows the atria to relax before the ventricles contract, ensuring efficient cardiac function.
Explanation:In the human heart, there is a delay between the ECG pattern and the resulting beat to allow for proper coordination and efficient pumping of blood. This delay occurs at the atrioventricular (AV) node, which is located between the atria and ventricles.
After the electrical signal spreads to the atria and causes them to contract, it reaches the AV node. The AV node acts as a gatekeeper, holding the signal for a brief moment before passing it on to the ventricles. This delay allows the atria to complete their contraction and relax before the ventricles contract.
The delay between the ECG pattern and the resulting beat ensures that the heart chambers work together in a synchronized manner, optimizing blood flow and overall cardiac function.
which of the following statements is true about the structure of the cell membrane?
A. the two layers of the plasma membrane are identical
b. the plasma membrane is a rigid structure
c. the proteins on the two layers are not identical
d. proteins are found only on one surface of the membrane
As the capture start increases, describe what happens to the fish population? what factors in the environment can affect the fish population?
When the capture starts to increase, the fish population from 50 capture start to 100 capture start upsurges. At 200 capture start, though, the population augmented in the beginning up until it touched 300 months where it significantly dropped.
Numerous environmental factors can affect the populace of fish. First, when there is a hurricane, the fish population will be affected because the water will move and change.
Second, pollution. When individuals pollute the ocean, it affects the fishes’ ability to live.
Lastly, when there is a lot of hunters that feed on fish. This may cause many fishes to be consumed and their population will be reduced.
Final answer:
Increasing capture start leads to a decrease in fish population due to dynamic growth rates that fall as population size decreases, causing overfishing. Factors affecting fish populations include predator-prey dynamics, environmental damage from industrialization, changes in marine biodiversity, and habitat destruction from fishing gear. These have contributed to a global decline in fish catches since 1996.
Explanation:
As the capture start increases, meaning the initial rate of fishing, the fish population tends to decrease. This is because the growth rate of fish is dynamic, not static, and it decreases as the population size diminishes. With increased capture rate, fishers may catch more than the growth rate, leading to a significant reduction in the fish population's ability to reproduce, a scenario known as overfishing. This unsustainable practice reduces the future potential for catches and the overall resilience of marine ecosystems.
Several factors in the environment can affect fish populations, including:
Predator-prey dynamics, where increases in predator or fishing pressure can lead to a decrease in fish numbers.The impact of industrialization, such as acid rain, that harms aquatic environments and leads to declines in fish populations.Changes in marine biodiversity, with a shift towards smaller forage fish as larger predatory fish become scarce due to overfishing.Damage to marine habitats caused by fishing gear such as trawls.The cumulative effects of these factors have led to a global decline in fish catches since 1996, signaling that current fishing practices are often unsustainable and pose a threat to future seafood supplies and prices.
Which group of proteins is used to "flag" microbes for destruction by phagocytes?
A client has vascular neurocognitive disorder. when teaching the family about the cause of this disorder, which would the nurse expect to integrate into the explanation?
A client has had a pacemaker implanted and the nurse will begin client education upon the client becoming alert. which postimplantation instructions must be provided to the client with a permanent pacemaker?
This was formerly used as a refrigerant and as a propellant in aerosol cans. These chemicals damage the ozone layer of the Earth
Answer:
Chlorofluorocarbon ( CFC )
Explanation:
Chlorofluorocarbon ( CFC ) is halogenated paraffin hydrocarbon that consists of carbon, hydrogen, fluorine and chlorine. It is derivative of methane, ethane and propane. It was used as refrigerant and propellant in aerosol cans. It triggers ozone depletion hence its manufacture has been stopped under Montreal Protocol and it has been replaced with other hydro fluorocarbons.
UV light on striking a CFC molecule in upper atmosphere, breaks the carbon chlorine bond which produces a chlorine atom. This chlorine atom reacts with an ozone molecule and destroys it. Hence, CFC damage the ozone layer of the Earth.
Predict how an unusually prolonged drought might affect a biological community
The bark of the pacific yew tree (taxus brevifolia) was the original source of one of the most effective drugs for treating tumors of the breast, lung, and other sites. taxol, a chemical extracted from this bark, kills actively replicating cells by inhibiting the depolymerization of microtubules. why are microtubules good targets for killing cancerous cells
What happens if a bacterial cell lands in a jar of jelly?
How did you test your hypothesis? which variables did you control in your experiment and which variable did you change in order to compare your growth results?
Hypothesis is a proposed explanation which is made on the basis of given experimental data taken as starting point for further investigation. All hypothesis test are conducted in a same manner fiollowing the four main steps:
1. State the hypothesis
2. Formulate an analysis plan
3. Analyzing the data obtained
4. Final step is to analyze the results
There are three types of variables taken in an experiment:
1. Independent variable: light, temperature, humidity
2. Dependent Variable: these depends upon the other variable. changes in the independent variable may cause the dependent variable to change, for example, growth of plant is a dependent variable which depends upon the amount of light(independent variable), the plant receives
3. Controlled Variable: these variable can be controlled and prevented from being change like ty[pe of plant, type of soil
Compare aerobic respiration and fermentation in terms of efficiency of obtaining energy from glucose
In this respiration, an organic molecule such asglucose is the electron donor and oxygen is the electron acceptor.Oxygen has a very high affinity for electrons, so a great deal ofenergy is released during aerobic respiration. Aerobic respirationis the primary mode of energy metabolism in animals.
Fermentation (common form of energy metabolism) Inthis, organic molecules serve as both electron donors and electronacceptors. Electrons are just moved from one carbon to another ofthe same molecule. Fermentation releases much less energy than respiration, since organic molecules have a lower affinityfor electrons than does oxygen.
Anaerobic conditions, glucose is oxidized to pyruvic acidvia glycolysis ,generating ATP and NADH. The pyruvic acid thenserves as the electron acceptor, producing CO2 andethanol as it re-oxidizes NADH back to NAD. Only two ATP are formedduring fermentation.
Under aerobic conditions, the pyruvic acid movesinto the mitochondria. In the mitochondria, the pyruvic acid isoxidized to acetyl CoA, which enters the tricarboxylic acid cycle(TCA cycle) where it is oxidized to CO2.
Three CO2 are produced for every pyruvate, or sixfor every glucose entering glycolysis. The electrons removed frompyruvic acid during its oxidation to CO2 aretransferred to NAD, reducing it to NADH. The NADH donates itselectrons to the electron transport system, which passes them on toO2 .
Many ATP are formed at the electron transport system.
Yeast obtains 36 moles of ATP per mole of glucose whenrespiring, compared with only two moles of ATP per mole of glucosein fermentation.
.Both processes usually startwith the same first step, glycolysis, but follow differentsubsequent pathways.
Duringfermentation,
1. Releases energy from sugars or other organic molecules,such as amino acids, organic acids, purines,pyrimidines.
Does not require oxygen (but sometimes can occur inits presence);
2. Does not require use of the Krebs cycle or anelectron transport chain .
3. Uses an organic molecule as the final electronacceptor; That produces only small amounts of ATP (only one or twoATP molecules for each molecule of starting material) because muchof the original energy in glucose remains in the chemical bonds ofthe organic end-products, such as lactic acid or ethanol. Duringfermentation, electrons are transferred (along with protons) fromreduced coenzymes (NADH, NADPH) to pyruvic acid or itsderivatives.
Those final electron acceptors are reduced to the end-products. In the process, NAD+ and NADP+ are regenerated andcan enter another round of glycolysis. An essential function of thesecond stage of fermentation is to ensure a steady supply of NAD +and NADP+ so that glycolysis can continue. In fermentation, ATP isgenerated only during glycolysis.Final answer:
Aerobic respiration greatly surpasses fermentation in efficiency, yielding up to 38 ATP per glucose molecule compared to only 2 ATP made through fermentation. Fermentation occurs without oxygen and utilizes organic compounds as the final electron acceptors, limiting its energy production.
Explanation:
Comparing aerobic respiration and fermentation in terms of energy efficiency from glucose illustrates a significant difference in ATP yield. Aerobic respiration is a highly efficient process that can yield up to 38 ATP molecules from a single glucose molecule. This process includes glycolysis, the Krebs cycle, and oxidative phosphorylation, utilizing oxygen as the final electron acceptor. On the other hand, fermentation, which can occur in the absence of oxygen, yields a mere 2 ATP molecules per glucose. Fermentation begins with glycolysis; however, it diverges by using organic compounds as the final electron acceptor, lacking the further ATP yield seen in aerobic processes due to the absence of the Krebs cycle and oxidative phosphorylation.
In essence, the efficiency difference is stark: aerobic respiration provides a higher yield of ATP, making it a preferred method for energy production in the presence of oxygen. In contrast, fermentation is a quicker, though much less efficient, process adopted in anaerobic conditions or scenarios where rapid energy production is required, such as in muscle cells during intense exercise.
The five distant planets are made mostly of
In fresh water a salt-water fish used to living in the ocean would be __________ to its new surroundings. the fresh water would move into the animal through its cell membranes in order to balance the salt concentration. therefore, ocean animals like salmon entering freshwater do not drink water.
hypertonic is the suitable word
which of the following characteristics does the love song of j alfred prufrock share with the jilting of granny weatherall?
a. both focus on a single image or memory
b. both take place within a period of several minutes
c. both have multiple speakers and perspectives
d. both move quickly between different memories and images
The correct option is D - both move quickly between different memories and images.
The main theme of these works is the inevitability of growing older and the inevitability of death. The love song of J.Alfred Prufrock and the Jilting of Granny Weatherall, both take place within a single person's mind and have a single speaker with the same theme.
Which two diagnostic tests are used to determine if congenital abnormalities of the nervous system are present in the fetus in utero? ct scan and mri thoracentesis and cxr ultrasound and amniocentesis ct scan and amniocentesis thoracentesis and mri?
Final answer:
Ultrasound and amniocentesis are the two main tests used to diagnose congenital abnormalities of the nervous system in a fetus, with CT scans being unsuitable due to radiation risks.
Explanation:
The two diagnostic tests used to determine if congenital abnormalities of the nervous system are present in the fetus in utero are ultrasound and amniocentesis. An ultrasound can reveal structural abnormalities and features like increased nuchal translucency, which can suggest chromosomal disorders such as Down syndrome.
Amniocentesis involves withdrawing a small amount of amniotic fluid to analyze fetal cells for chromosomal abnormalities, such as trisomy-21, enzymatic defects, and over 100 other genetic conditions.
This procedure can also be used in conjunction with FISH (Fluorescent In Situ Hybridization) to provide a more detailed genetic analysis when there's a high risk of chromosome abnormalities.
It is important to note that while CT scans can provide detailed images, especially for soft tissue, the use of CT scanning is generally avoided in prenatal diagnostics due to the exposure to high levels of radiation, which can be dangerous for the developing fetus.
Therefore, CT scans and thoracentesis, which involves removing fluid from the space around the lungs, are not typically used for diagnosing congenital abnormalities in utero.
Weak covalent bonds, such as ones in carbohydrates and lipids, have:
The broad, fan-shaped muscle of mastication that you can feel alongside your temple as you open and close your jaw is the __________.
https://brainly.com/question/5968126 The broad, fan-shaped muscle of mastication that you can feel alongside your temple as you open and close your jaw is the temporal muscle.
Further Explanation:
The temporalis muscle is a kind of muscle that gets its name because of its position inside the body. This muscle looks like a fan-shaped muscle present at the temporal bone inside the cranium or skull. It sides bone of a skull. The temporalis muscle is attached or inserts into the coronoid process and the ramus of a mandible.
The broad fan-shaped muscle of the mastication which an individual can feel alongside their temple as an individual close or open the jaw is referred to as the temporalis. Temporalis function is to elevate and retracts the mandible. It is the chewing muscle necessary for crushing and smashing objects between the molars. The temporal mandibular joint has a unique feature that makes it able to show a unique unidirectional movement. It shows a side to side movement and forward and backward moment. These movements help in smooth chewing.
Learn more:
1. Learn more about carbohydrate monomer https://brainly.com/question/6947177
2. Learn more about core muscle stabilization https://brainly.com/question/1231927
3. Learn more about energy storage https://brainly.com/question/523624
Answer Details:
Grade: High School
Subject: Biology
Chapter: Joints and Movement
Keywords:
Mandible, muscle, temporalis, function, temporal bone, position, skull, unique, feature, fan-shaped, broad, ramus, mandibular, crushing.
How did the climate in the Eocene compare to that of today?
PLEASE ANSWER! THIS IS URGENT! 15 POINTS!
Examine the diagram of the cell cycle. Which label identifies the step labeled W?
Which of the following best describes how you meet your energy needs
Compare and contrast prokaryotic and eukaryotic gene expression. sort each characteristic into the appropriate bin.
Correctly the spell the term that means pertaining to a disease of unknown etiology: ____________.
The component of the blood that carries oxygen and carbon dioxide to and from the cells is _____