Answer:
Agriculture gave people the opportunity to create civilizations, fight hunger and work to combat challenges in population growth and climate change.
Explanation:
Another positive development in farming is the rapid expansion of farmers markets. Farmers markets allow small farmers to interact directly with consumers. The food system remains within the local economy by being locally produced and eliminates the need for long-distance transportation. The opportunity to purchase locally grown food proves invaluable as the demand for it rises.
what are the types of tropism
Answer:
Forms of tropism include phototropism (response to light), geotropism (response to gravity), chemotropism (response to particular substances), hydrotropism (response to water), thigmotropism (response to mechanical stimulation), traumatotropism (response to wound lesion), and galvanotropism, or electrotropism (response to electric current).
Tropism is a response to certain stimuli. A positive tropism is moving towards the stimuli, while a negative tropism is moving away from a stimuli.
Positive Phototropism - Growing towards light
Negative Phototropism - Growing away from light
Positive Thigmotropism- Moving towards touch
Negative Thigmotropism- Moving away from touch
Positive Hydrotropism - Growing towards water
Negative Hydrotropism - Growing away from water
Positive Gravitropism - Growing towards ground
Negative Gravitropism - Growing upwards
An antibody molecule has a molecular weight of 150 kD when analyzed by SDS polyacrylamide-gel electrophoresis (SDS-PAGE). Treatment with mercaptoethanol, a reducing agent that breaks disulfide linkages, yields polypeptides with molecular weights of 50 kD and 25 kD, and both of these bands are similar in intensity and thickness. Based on this gel pattern as described, what can we conclude about the molecular composition of the antibody molecule
Answer:
The antibody has a molecular weight of 150 kD and consists of four subunits: two subunits of 50 kD and two subunits of 25 kD, which are bonded by covalent bonds.
Explanation:
Sodium dodecyl sulfate (SDS) is a detergent used to alter and denature proteins before gel electrophoresis. SDS can break hydrophobic interactions and hydrogen (H) bonds, but this detergent does not break down disulfide bonds, which is a type of covalent bond between two sulfur atoms. Moreover, mercaptoethanol is a reducing agent used to break disulfide bonds. In this case, it is expected that mercaptoethanol can break disulfide bonds between the four subunits of the mature antibody, thereby yielding two bands corresponding to the 50 kD and 25 kD bands (two subunits of 50 kD + two subunits of 25 kD = 150 kD).
Use the drop-down menus to complete the hypothesis of the first group of researchers. During a drought, the decrease in rainfall will reduce the amount of vegetation that can grow and increase the occurrence of natural fires, so an elevation in Select… and a reduction in Select… should be found in the cores.
Answer:
Microscopic charcoal, Vegetation.
Explanation:
As the researchers conducting research in the Nile region identified that an increase in temperatures leads to an increase in droughts and reduction of natural vegetation and thereby the chances of the occurrence of natural fires.Explain the relationship of the structure of cell membrane molecules to the function of the cell membrane overall. You must discuss the structure/function relationship of at least 3 different molecules that compose the cell membrane.
Help me please
Answer:
to protect the cell from its surroundings
Explanation:
I double checked my notes
what type of transport takes place when a protien allows an ion to enter a cell, but no additional energy is needed to make this happen?
Answer:
The answer is facilitated diffusion. It requires no energy because the ions are traveling down the concentration gradient. Facilitated diffusion is important for the regulation of ions in a cell. It also enables ions to pass across the hydrophobic layer of the cell membrane composed of phospholipids.
Write a poem on environment with the title "I am the earth"
Answer:
I am the earth a beautiful place where birds and sparrows sing. I am the earth , a beautiful place where plants grow thick and thin.
Determine the correct order for the transmission of a signal through the nervous system.
I. Nerve impulse is triggered
II. Neurotransmitters diffuse across synaptic cleft
III. Receptors bind neurotransmitters
IV. Synaptic vesicles release neurotransmitters
A. I, IV, II, III, I
B. II, III, IV, I
C. IV, I, II, III, IV
D. I, III, IV, III, II, III
Answer:
A. I, IV, II, III, I
Explanation:
Living system can be defined as the internal systems of organisms and how materials circulate within organisms.
Generally, these living systems are self-organized life forms and are known to be very much interactive with their surroundings or environment. Also, living systems are dependent on the flow of information, matter and energy at various levels.
Some examples of living systems in organisms are respiratory system, nervous system, digestive system, and circulatory system.
Additionally, living systems comprises of the following components; cells, organs, muscle, tissues, blood, etc., which are typically used for carrying out various bodily functions such as respiration, metabolism, digestion, etc.
A sensory system can be defined as components of the central nervous system (CNS) which comprises of the brain, neural tissues or pathways and sensory neurons responsible for sensory functions, perception and processing sensory informations such as sound, light, heat, etc.
Basically, the central nervous system (CNS) interprete the neural signals that are generated from stimuli that are detected by the sensory system. The five (5) main sense organs in the sensory system are: skin, tongue, ears, nose and the eyes.
Generally, the nervous system found in living organisms such as humans, comprises of two (2) major components or systems; a central nervous system (CNS) and a peripheral nervous system (PNS).
The correct sequential order for the transmission of a signal through the nervous system;
1. Nerve impulse is triggered.
2. Synaptic vesicles release neurotransmitters.
3. Neurotransmitters diffuse across synaptic cleft.
4. Receptors bind neurotransmitters.
5. The whole process is started all over again when the nerve impulse is triggered.
Answer:
A. I, IV, II, III, I
Explanation:
Match the terms to their definition.
the number of individual
organisms born into a population in a given year
the movement of individuals out of a population
the number of individual organisms that die in a population in a given year
the movement of individuals into a population
Match the terms to their definition
The number of individual organisms born into a population in a given year is called birthrate.The movement of individuals out of a population is called emigration.The number of individual organisms that die in a population in a given year is called deathrate.The movement of individuals into a population is called immigration.Hope it helps you! ＼(^ᴥ^)／
Answer:
1 4 3 2
Explanation:
Propose advantages and disadvantages of nuclear energy as an energy source.
Answer:
Advantages:
Produces no polluting gases.
Does not contribute to global warming.
Very low fuel costs.
Low fuel quantity reduces mining and transportation effects on environment.
High technology research required benefits other industries.
Disadvantages:
Waste is radioactive and safe disposal is very difficult and expensive.
Local thermal pollution from wastewater affects marine life.
Public perception of nuclear power is negative.
Costs of building and safely decommissioning are very high.
Cannot react quickly to changes in electricity demand.
The Punnett square illustrates a cross for color of the flower.
Based on the phenotypes and genotypes of these offspring. It is clear that purple flower color allele is
and the parents are
dominant
polygenetic
recessive
ntum. All rights reserved.
hp
Answer:
All right reserved
Human skin color is a good example of polygenic (multiple gene) inheritance. Assume that three "dominant" capital letter genes (A, B and C) control dark pigmentation because more melanin is produced. The "recessive"alleles of these three genes (a, b & c) control light pigmentation because lower amounts of melanin are produced.
hope it will help
Here, from the cross of the purple and white flower, all offspring are purple, which indicates that the purple color is dominant in nature and is present in Option A.
What is Punnett Square?The Punnett square is a tool used to predict the probability of offspring inheriting specific alleles from their parents. If all of the offspring exhibit the same phenotype (such as purple flower color), it is likely that the parents both carried at least one dominant allele for that trait. This would mean that the purple flower color allele is dominant. Here, the parents are both purple and white, so all the offspring are dominant in nature.
Hence, from the cross of the purple and white flower, all offspring are purple, which indicates that the purple color is dominant in nature and is present in Option A.
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complete question is below
The Punnett square illustrates a cross for color of the flower (purple- parent, white -parent). Based on the phenotypes and genotypes of these offspring (all purple), it is clear that purple flower color allele is
A.) Dominate
B.)polygenetic
C.) recessive
Which of the following shows the correct order in which sound information travels through the ear?
O Ossicles, eardrum, cochlea, cochlear nerve
Eardrum, ossicles, cochlear nerve, cochlea
O Eardrum, ossicles, cochlea, cochlear nerve
O Ossicles, eardrum, cochlear nerve, cochlea
The following shows the correct order in which sound information travels through the ear is Eardrum, ossicles, cochlear nerve, cochlea.
What is the cochlear nerve?The cochlear nerve, additionally called the acoustic nerve, is the sensory nerve that transfers auditory records from the cochlea (auditory vicinity of the internal ear) to the brain. It is one of the many portions that make up the auditory system, which permits powerful listening to.
We pay attention while sound waves journey thru the air to our eardrum, throughout our center ear, into our internal ear, and sooner or later to the auditory facilities of our brain. Our ears are constantly on and are constantly sporting sounds alongside this listening-to pathway.
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Answer:
Eardrum, ossicles, cochlea, cochlear nerve
Explanation:
In your textbook, read about nucleotides.
Label the diagrams of DNA nucleotides and bases. Use these choices:
Cytosine
Guanine
Phosphate
Purine
Pyrimidine
Sugar
1.
2.
3.
4.
5.
6.
Answer:
1. phosphate
2.sugar
3.purin bases
4.guanine
5.pyrimidine
6.cytosine
The graph below shows the number of sunspots observed between 1750 and 2000.
Based on the graph, which of these statements is most likely correct about the period between 1900 to 1950? (2 points)
A. There was a decrease in global temperatures.
B. There was an increase in global temperatures.
C. There was no significant change in global climate.
D. There was no significant change in solar activity.
You farm kelp and sell the kelp for food and as fertilizer. The wastes from the kelp can be used in an integrated aquaculture system in which kelp farming can be coupled with farming of fish or abalone. Make an argument that you are using a sustainable system of growing a renewable resource, and explain why it is beneficial (and more sustainable) to couple algae farming with fish farming than simply to farm fish independently.
Answer:
A sustainable system refers to producing less or probably non-existent debris that are caused by the production of a particular material (i.e. produce, energy). This is a sustainable form of production of coupling algae growth and fish farming because you no longer need the supply of fish feed from other sources that are made artificially but rather, you are using the available algae growth that you are culturing. Farm fishing alone is non-renewable because this produces much waste that can directly harm the environment.
An integrated aquaculture system of fish farming with kelp farming is a sustainable system as both system exchange resources and thus reduce wastage of resources.
What is an integrated aquaculture system?An integrated aquaculture system is an aquaculture system which combines several forms of aquaculture together.
For example, kelp farming is a form of aquaculture which can be integrated with another form of aquaculture such as fish farming.
Integrating fish farming with kelp farming is a sustainable system as both system provides what the other needs.
The kelps serve as food to fish while fish waste serve as manure for kelps.
Therefore, integrating fish farming and kelp farming is a form of a sustainable system.
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Davahl is interested in tortoises because they can live for over a hundred years and have unique metabolisms. She wants to perform an experiment to see if they can live even longer with a specific nutrient supplement Davahl is given a five-year research grant to perform her experiment
Which is the most likely practical limitation that Davahl is having with performing her experiment?
O time
O ethics
O money
O technology
Answer:
Time
Explanation:
As said In The Question "They Can Live Over A Hundred Years", Well There Is No Way That Davahl Can Live For Over A Hundred Years
why is the nucleus important to the cell
Answer:
Because it controls all the activities in the cell
The nucleus is considered to be one of the most important structures of eukaryotic cells as it serves the function of information storage, retrieval and duplication of genetic information. It is a double membrane-bound organelle that harbours the genetic material in the form of chromatin.
plz mark brainliest
nitrogenous base + sugar + phosphate group =
Answer:
Nucleoside
Explanation:
Nucleotide is an organic compound which is made from of nitrogenous base, a sugar, and a phosphate group.
What is love ???
Please don't spam
Answer:
Read john 3:16 from the bible. That is the love God shows on us even when we don't believe his existence or deny him as the truth, ..world is important but it is not permanent.
Which equation represents fertilization?
haploid + diploid = diploid
diploid + haploid = haploid
haploid + haploid = diploid
diploid + diploid = diploid
Answer:
the answer is (C) haploid + haploid = diploid
Explanation:
edge 2021
Haploid+ Haploid = Diploid represents fertilization. So, the correct option is (C).
What is Fertilization?
Fertilization is defined as the process in which two gametes where one male and one female first form a zygote and then lead to the development of an embryo.
These germ cells are cells that give rise to gametes – either egg cells that are female gametes or sperm cells that are male gametes.
These germ cells are the only cells that can undergo both mitosis and meiosis. These are the diploid cells present in the gonads. After meiosis, haploid gametes are produced. In fertilization two haploid gametes fuse (n+n) and form a diploid zygote (2n)
Thu, Haploid+ Haploid = Diploid represents fertilization. So, the correct option is (C).
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how does baby get its shape in the womb of an woman?
Answer:
Uterus (also called the womb): The uterus is a hollow, pear-shaped organ located in a woman's lower abdomen, between the bladder and the rectum, that sheds its lining each month during menstruation. When a fertilized egg (ovum) becomes implanted in the uterus, the baby develops there.We have all heard about earthquakes or the cyclones that attack the coastal regions. Think of as many different ways as possible in which people's health would be affected by such a disaster if it took place in our neighbourhood. (a) How many of these health -related events would occur long after the actual disaster, but would still be because of the disaster? (b) How can it affect the life of people if in case of a pandemic?
Answer:
The disease spread to the neighbourhood.
Explanation:
If the disaster such as earthquake and pandemic etc occurs in the neighbourhood so it also affected the health of the people of that region as well as the people that lives in the neighbourhood. In the case of pandemic, the disease spread to the neighboring area and affect the health of people while on the other hand, in earthquake the people of neighbourhood is also affected if the intensity of earthquake is higher.
1. Place a check mark next to each cellular structure necessary to build a bacterial cell.
plasma membrane
cell wall
DNA
nucleus
mitochondria
chloroplast
Golgi apparatus
smooth endoplasmic reticulum
rough endoplasmic reticulum
nucleoid
Answer:
Plasma Membrane
Nucleus
Mitochondrion
Golgi Apparatus
Smooth Endoplasmic Reticulum
Rough endoplasmic reticulum
I hope this help
Explanation:
Giải thích mối quan hệ giữa gen và tính trạng ? Tại sao người ta nói cái được di truyền từ đời này sang đời khác không phải là tính trạng
Answer:
Sorry I can't understand anything
Phenylketonuria (PKU) is a genetic disease caused by mutation of the PAH gene, which normally produces the enzyme phenylalanine hydroxase. This enzyme is essential for the conversion of the amino acid phenylalanine into tyrosine. Without the enzyme, phenylalanine builds up in the blood and tissues of various body regions. It can produce severe skin discolorations and foul odor, but also intellectual disabilities and behavioral problems. Some people may experience only one type of PKU symptoms and not the others. PKU is an example of
Answer:
The correct answer is - Pleiotropy.
Explanation:
Pleiotropy is the number of disorders where multiple, and unrelated organ systems are affected in the body of an individual. Phenylketonuria (PKU) is the most cited example of pleiotropy in humans.
It is an inherited disorder that is caused by a deficiency of the enzyme phenylalanine hydroxylase due to mutation in the PAH gene, This enzyme is necessary to convert the essential amino acid phenylalanine to tyrosine. By this disorder, multiple organ systems are affected such as severe skin discolorations and foul odor, and other intellectual disabilities and behavioral problems.
Thành phần nào dưới đây không thuộc cơ quan phân tích thính giác
Answer:
Sorry I can't understand anything
What does an Electrocardiogram do?
A. Measures the electrical activity of a heart by measuring the current in the skin above it.
B. Pill that contains 3 grams of electrochemical material that helps keep the electrical current in the heart balanced.
C. Measures how much electrical current can be passed through a heart before it stops beating.
D. Restarts the heart by sending an electrical pulse through it.
Answer:
It actually measures the electrical activity
Explanation:
They are sticky wires that they put on your arms and chest etc
Electrocardiogram measures how much electrical current can be passed through a heart before it stops beating. The correct option is C.
What is electrocardiogram?An electrocardiogram is a simple test that can be employed to check the rhythm and electronics activity of your heart. Sensors connected to the skin detect the electrical signals generated by your heart every time it beats.
The electrical signals in the heart are recorded by an electrocardiogram. It's a prevalent and painless test for detecting heart problems and monitoring heart health.
An electrocardiogram, also known as an ECG, is frequently performed in a doctor's office, clinic, or hospital room.
It is a heart electrogram, which is a chart of voltage over time of the electrical activity of the heart recorded with electrodes placed on the skin.
Thus, the correct option is D.
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How does variation contribute to evolution?
A. Variation changes an organism over time, allowing them to evolve slowly as they grow.
B. Variation does not contribute to evolution.
C. Variation causes changes in the DNA, some of which are passed on, changing the species slightly each generation.
D. Variation produces a great variety of advantages for natural selection to select, through the process of Mitosis.
Answer:
I think its A
Explanation:
Variation usually results in changes in the DNA which are passed on the future generation and changing the species slightly each generation. The correct option is C.
What is variation?The disparity in the character traits of organisms in a population is referred to as variation.
Different traits can be introduced into an organism by genetic variations that alter gene activity or protein function.
Thus, the correct option is C.
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A sealed Ecosphere is able to perpetually sustain life until what happens? A. Oxygen is depleted. B. The producers use up all the carbon dioxide (CO2). C. Energy makes it to the highest trophic level. D. Necessary minerals become locked in deposits.
Answer:
D. Oxygen is DEPLETED
Explanation:
iT NEEDS OXYEN TO SUSTAIN IN A CLOSED ENVIRONMENT
A sealed ecosphere is able to constantly continue life until oxygen is depleted. The correct option is A.
What is a sealed ecosphere?A sealed ecosphere is a name given to a sealed ecosystem designed and made by Ecosphere Associates, Inc. These are miniature ecosystems in glass containers.
These miniature ecosystems continuously need oxygen to survive, because it contains small plants or mosses, or algae to grow inside.
Thus, option A. Oxygen is depleted is correct.
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1. Mention FIVE adaptations of aquatic organisms to their habitat. B. Write out the causative organisms fro the following infections (1) cholera (ii) malaria (iii) yellow fever C. Highlight THREE characteristics of mammals.
Aquatic animals have various structural modifications in their body to adapt to the aquatic habitats. Some of the adaptations of aquatic animals are:
Their body is streamlined and hence, they can swim easily.
They have gills as the respiratory organs.
They have fins as the locomotory organs, Various types of fins are present in fishes such as dorsal fins, pectoral fins, caudal fins etc.
The body is covered by appendages known as scales. They are meant for protection.
Some fishes have modified swim bladder with the help of which they can constantly float at a certain depth of water.
B. Cholera and Yellow Fever
Why is the ability to bioluminesce beneficial? signals may be sent out to communicate an interest in mating it can camouflage the underbelly of the fish by lighting it up the same color as the sea surface so that the fish will be almost invisible to predators swimming below food may be found even in the darkest parts of the ocean or at night the light may momentarily distract predators, allowing the organism a chance to escape all of the above
Answer:
The correct answer is - All of the above
Explanation:
Food is produced at every part of the earth as it may be found even in the parts that are darkest at night or at the part of ocean. Communication between mates can be done by signals that may sent to show interest in mating, Camouflage is the way to escape or hide by use of the light that may momentarily distract predators as it can camouflage the underbelly of the fish by lighting it up the same color of as the sea surface to make it invisible.
