Answer:
40
Explanation:
The population size refers to the total number of individuals in a population. It can be obtained by counting the total number of individuals in a population. In a typical plant field where it is almost impossible to count the number of individuals, the population size can be mathematically estimated using the quadrat method:
Population size = (A/a) x n,
where A = area of the field, a = area of quadrat, and n = number of plants per quadrat.
In the illustration, the area of the abandoned field was not given. Hence, it is assumed that the area of the field is equivalent to the number of quadrat thrown. Since the size of the quadrat is 1 square meter:
Area of the field = 80 x 1 = 80 square meters.
Number of plant per quadrat = 40/80 = 0.5
Population size = 80/1 x 0.5 = 40
Therefore, the population size is 40 spear grasses.
Answer:
40
Explanation:
what is the term that describes what occurs when genetic drift results in the formation of a new population that has less variation than the original population had A. Speciation B.Founder effect C.Mutation D. Sexual selection .
Answer:
A. Speciation
Explanation:
Speciation is how a new kind of plant or animal species is created. Speciation occurs when a group within a species separates from other members of its species and develops its own unique characteristics.
When the genetic drift occurs due to various factors and results in the formation of a new species it is called speciation. Thus, option A is correct.
What is speciation?Speciation is the formation of a distinct species from the original population because of the genetic drift that caused evolutionary changes essential for survival.
The species are separated from their original population leading to variation in the gene pool resulting in reproductive isolation and finally, the new species is formed.
Therefore, option A. speciation results in distinct species.
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Please help me.. ty if you do
Chloe is studying the effect a certain kind of fungus has on bacteria. Which of the following could be her hypothesis?
"I notice that when a certain fungus is present in a bacterial culture, the bacteria do not grow".
"Based on my tests, I realize that this fungus kills bacteria".
"I predict that the bacterial cultures in which I place this fungus will not grow".
"I propose that this fungus somehow kills bacteria."
Answer:
I propose that this fungus somehow kills bacteria
Explanation:
you rule out 2,3 because a hypotheses has not yet been proven therefore it is not certain
while in 1 in some cases the bacteria can also over power and kill the fungi using genes
but I chose 4 since fungi lack chloroplasts so they feed of ready made food and bacteria can be autotrophic therefore can manufacture food and so the fungi digests the bacteria in the process of trying to acquire the food since they don't have cell walls I guess
Fill in the blanks below with apropriate words:
a. Mentalis
b. Masseter
c. Frontalis
d. Sternocleidomastoid
e. Stylohyoid
f. Zygomaticus major
g. Digastric
h. Orbicularis oris
i. Hyoglossus
1. ____________elevates and protrudes lower lip.
2. _____________is a major chewing muscle.
3. _____________ raises the eyebrows. Sternohyoid .
4. _____________originates on the sternum and clavicle.
5. _____________one of the smiling muscles.
6. _____________consists of two bellies.
7. _____________depresses the tongue.
Answer:
1. Mentalis
2.Masseter
3. Frontalis
4. Sternocleidomastoid
5. Zygomaticus major
6. Digastric
7. Hyoglossus
Explanation:
1. Mentalis is a muscle which elevates and protrudes lower lip.
2. Masseter is a major chewing muscle. It is essential for mastication of substances in the mouth.
3. Frontalis raises the eyebrows.
4. Sternocleidomastoid originates on the sternum and clavicle.
5. Zygomaticus major is known as one of the smiling muscles. It is responsible for smiling and facial expressions.
6. Digastric consists of two bellies which are muscle masses and it is found between the jaw and skull.
7. Hyoglossus originates from the hyoid bone and it depresses the tongue.
The students are studying for an exam in pharmacology. They know several local anesthetics have been covered along with other forms. Which medication can they anticipate as being local anethetics on the exam?
a) marcaine
b) xylocaine
c) novocain
Answer:
These are all examples of local anaesthetics a) marcaine(Bupivacaine) b) xylocaine(lidocaine) c) novocain(procaine) are all examples of local anaesthesia
Explanation:
Generally local anaesthetic are drugs used in clinical anaesthesia to block or suppress the sensation of pain at the specific region or part of the body where it was applied.The effect of the application depends on the dose applied and the period of application.
The work by inhibiting transmission of action potential as nerve transmission,through blocking of sodium channels. Thus depolarization is prevented,and nervous transmission to the brain (and therefore pain) is suppressed
Generally pain transmission fibres are blocked first,motor sensation are lost afterwards ,therefore touch sensation and pressure are the last to be lost by the local region.
They are classified into Amide or ester group based on the chemical structures.The examples in the question are amides.
Subcutaneous or epidural administrations can be used to apply
Write any five points which helps everyone to orgasms faster.
Answer:
Here are my five -hot -cute -pretty -charming -gorgeous
Explanation:
-Hot = if she's hot she will make you wet
-Cute = if she's cute she will make your thing stick
Pretty = if she's pretty she's tolerable
charming = great vibes
gorgeous = makes you hard
Complete each statement with the correct term from the drop-down menu.
Many molecules are moved through the body by
.
provide structure for plants.
determine what people look like.
Cells are surrounded and protected by
.
speed up chemical reactions in the body.
Hemoglobin, a protein, is built by
.
The human body is insulated by
Answer:
1. Proteins
2. Carbohydrates
3. Nucleic acids
4. Lipids.
5. Proteins
6. Nucleic acids
7. Lipids
Correct on edge 2020!!!
abstract excretion in animals
Given that,
Abstract excretion in animal,
Excretion in animal :
Excretion in animal is defined as the elimination of metabolic,or nitrogenous waste products from the body of an organism.
Type of excretion are,
(I). Ammonotelism
In this type of excretion the excretory product is ammonia.
(II). Ureotelism
In this type of excretion the excretory product is urea.
(III). Uricotelism
In this type of excretion the excretory product is uric acid.
(IV). Aminotelism
In this type of excretion the excretory product is amino acid.
(V). Guanotelism
In this type of excretion the excretory product is guanine.
How can ocean pollution be controlled?
Answer:
You could start a group and pick up trash from the ocean and inform people that if we throw trash in the ocean sea animals can die and the ocean will be dirty and one day we will have no water left to drink if all water is dirty
Explanation:
No explanation
The predatory bacterium Bdellovibrio bacteriovorus drills into a prey bacterium and, once inside, digests it. When the predatory bacterium attacks the gram-negative bacterium, what are the first structures penetrated by B. bacteriovorus on its way into the prey's cytoplasm
Answer:
The outer membrane, a peptidoglycan layer, periplasm, and cell membrane
Explanation:
The predatory bacterium will have to penetrate the cell wall and the cell membrane of the gram-negative bacterium before getting access to the cytoplasm.
In order to penetrate the cell wall of a gram-negative bacterium, the predatory bacterium will have to penetrate the components of the cell wall which consists of an outer membrane, a thin peptidoglycan layer, and a gel-like matrix known as the periplasm.
Thereafter, the predatory bacterium will have to penetrate the cell membrane before eventually getting access into the cytoplasm of the prey bacterium.
The peptidoglycan layer or the outer membrane will be the first structure penetrated by the B. bacteriovorus.
The attack of the predatory bacterium on the other bacterium:In the given case, the predatory bacterium, that is, B. bacteriovorus needs to penetrate the cell wall and the membrane of the gram-negative bacterium prior of getting within the cytoplasm of the host bacterium.
To penetrate the cell wall of a gram-negative bacterium, the predatory bacterium have to infiltrate the cell wall components comprising,
An outer membranePeriplasm, that is, the gel-like matrixA thin peptidoglycan layerThus, the predatory bacterium will first have to penetrate the peptidoglycan layer of the gram-negative bacterium.
Find out more information about the attack of the predatory bacterium on the other bacterium here:
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What happens when organisms populate a new area and are isolated geographically from other populations of the same species?
Answer:
The geographically isolated population will acquire genetic differences that eventually will lead to its speciation
Explanation:
Geographic isolation is a biological process produced by the physical separation between organisms of the same species, which may be caused by different types of geographical barriers such as, among others, mountains, earthquakes, rivers, etc. Geographic Isolation produces genetic differences between the separated groups. Over time, these genetic differences will lead to the reproductive isolation of the new population, thereby leading to the formation of a new species in the course of evolution, in a mechanism referred to as speciation.
What happens when carbon dioxide is passed over lime water? What happens when excess carbon dioxide is passed over lime water? Explain in 2-3 statements and write two balanced chemical equations.
Answer:
in 1 it forms insoluble CaCo3 which is white in excess it forms soluble calcium hydrogen carbonate which is colourless
1:Ca(OH)2{aq}+CO2{g} - CaCO3{s}+H2O{l}
2:CaCO3{s}+H2O{l}+CO2{g} - Ca(HCO3)2{aq}
3) Because cardiac muscles are mechanically, chemically, and electrically connected to one another, cardiac muscle tissue functions like a single enormous muscle cell. For this reason, it is called a functional ________.
Answer: FUNCTIONAL SYNCYTIUM
Explanation: The cardiac muscles are the Pericardium (outermost), Myocardium (middle) and Endocardium (innermost) though three(3) in number but they work as a unit,this functional unit starts with the action of the pacemaker cells,the Sinoatrial nodes,Atrioventricular nodes, bundle of his,bundle branches/purkinjes fibers.
The contraction of the heart muscles relies on impulses from the nervous system and the contraction is coordinated and rapid inorder to bring about a uniform conduction of blood into, through and out of the heart.
For a species with a haploid number of 23 chromosomes, how many different combinations of maternal and paternal chromosomes are possible for the gametes based on the independent assortment of chromosomes during meiosis
Answer:
About 8 million
Answer:
About 8 million
Explanation:
What is a ‘control’ in an experiment
Answer:all the things that you keep the same in the experiment
Explanation:
In order to convert prairie grass to bioethanol, what is needed after breaking down cellulose to simple sugars?
A. fermentation
B. cellulase
C. amylase
D. protease
Answer:
fermentation
Explanation:
When you ferment there will be chemical break down of the substance
The function of hemoglobin is to The function of hemoglobin is to stimulate erythropoiesis. carry dissolved blood gases. carry bicarbonate ion. produce antibodies. aid in the process of blood clotting.
Answer:
Carry dissolved blood gases
Explanation:
Haemoglobin is a protein usually found in the red blood cells and is said to be what give the blood its characteristics red color.
Haemoglobin is a protein that also contain some iron atoms which binds oxygen; a gas to itself and aid in the transport of oxygen from the lungs in some group of animals and gills in others to the rest of the body allowing for aerobic respiration to occur in the body.
Which description refers to fog? burns off when it gets dark extends up to 10 miles into the sky is found in areas near bodies of water forms when the ground warms at night after a cool, dry day
Answer:
forms when the ground warms at night after a cool, dry day
Explanation:
fog forms when the ground is cooler then the air around it
Answer:
[tex]\large \boxed{\mathrm{is \ found \ in \ areas \ near \ bodies \ of \ water}}[/tex]
Explanation:
Fog forms when water vapor condenses to tiny droplets of water. The moisture that creates fog is produced from nearby or at bodies of water.
The graphic shows the citric acid cycle. A diagram of the citric acid cycle is shown. Acetyl C o A enters the citric acid cycle and combines with a 4-carbon compound to form citric acid. During the citric acid cycle, what happens to acetyl-CoA? It enters the citric acid cycle and gains carbon dioxide to form citric acid, and gains more carbon dioxide through redox reactions to form a 4-carbon molecule. It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule. It enters glycolysis and associates with a 5-carbon molecule through redox reactions, forming another acetyl-CoA molecule. It enters the citric acid cycle and associates with a 4-carbon molecule, forming a 5-carbon compound, and then through oxidation reactions regenerates the 4-carbon molecule.
Answer:
It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule.
Explanation:
Acetyl-CoA(2C) associates with oxalacetate(4C) to form citric acid(6C). Then through redox reactions, CO2 molecules result from decarboxylation (COOH becomes R-(R1)CH-R2). And through dehydrogenation H2 molecules are incorporated in NADH+ in FADH2, resulting in the 4-carbon molecule at the beginning (oxalacetate). That's why it's called a cycle(Kreb's cycle or citric acid cycle)
In the citric acid cycle, when acetyl-CoA enters the cycle, it associates with a 4-carbon molecule (Oxalacetate), forming citric acid, and then through redox reactions regenerates the 4-carbon molecule (Oxalacetate).
--------------------
The resumed steps of the Citric acid cycle are as follows,
1) Acetyl CoA joins an oxaloacetate molecule, which is a 4C molecule. They release the CoA group and form a 6C molecule called Citrate.
Acetil CoA + Oxalacetato → Citrato + CoA group
2) Citrate turns into an isomere Isocitrate
3) Isocitrate oxidates and release 1 CO₂ molecule, producing an α- ketoglutarate molecule -this is a 5C molecule-. Meanwhile, NAD+ reduces to NADH.
Isocitrate + NAD+ → α-cetoglutarate + CO₂ + NADH
4) α-ketoglutarate oxidates and release 1 CO₂ molecule, producing a 4C molecule, which joins a Coenzyme A producing Succinyl-CoA. Meanwhile, NAD+ reduces to NADH.
α-cetoglutarate + NAD+ → 4C molecule + CO₂ + NADH
4C molecule + Coenzyme A → Succinil-CoA
5) CoA from Succinyl-CoA is substituted with a phosphate group, which then forms ATP. The final product is Succinate and ATP
Succinyl-CoA + Phosphate group + ADP → Succinate + ATP + CoA
6) Succinate oxidizes and forms Fumarate, a 4C molecule. FAD+ forms FAH₂
Succinate + FAD+ → Fumarate + FADH₂
7) A water molecule and Fumarate produce Malate, which is another 4C molecule
Fumarate + H₂O → Malate
8) Finally, malate oxidizes and oxalacetate regenerates -the initial 4C compound-. NAD+ reduces to NADH.
Malato + NAD+ → Oxalacetate + NADH
So, when acetyl-CoA enters the cycle, it associates with a 4-carbon molecule (Oxalacetate), forming citric acid, and then through redox reactions regenerates the 4-carbon molecule (Oxalacetate).
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which following pairs of body functions are normally involuntary actions but can be controlled voluntary for a short periods of time
Explanation:
Medulla oblongata controls consciousness and arousal (the reticular formation) and its three vital reflex centers control the blood vessels diameter, heartbeat and breathing rate (the involuntary actions). This makes option D correct. The lower part of brain stem forms the hind brain which comprises of medulla oblongata, pons and cerebellum. This makes option C incorrect as medulla is not part of forebrain. Cerebellum is the convoluted subdivision of brain stem and is associated with coordination of muscular movement, muscle tone and balance i.e. the voluntary actions. Option B is incorrect. Spinal cord, along with brain, forms central nervous system which serves to integrate the sensory inputs from internal and external environment as received by sensory neurons and process and finally transmit the nerve impulses to effectors (muscles and glands). This makes option A incorrect.
Which are three requirements for forming petroleum?
Answer:
i think it is oxygen, heat, steam heat.
Explanation:
Can chickens
and ducks
live
together?
Answer:
no chickens and ducks not together live
Answer:Yes
Explanation:
I had my chickens and duck live together for a long time. The ducks might try to peck the chickens but it is just them figuring out the pecking order. Hope this helps!
Why does mensuration occurs?
Explanation:
Mensuration is a natural process in which there is discharge of dead endometrial cells, unfertilized ovum, blood from broken capillaries and mucous membrane from uterus every month. As it is a natural process, it occurs every month to discharge the unwanted substances from our body. It makes our body free from the unwanted substances which can cause infection. It releases the unfertilized hormones prodoced in uterus of female.
hope it helps...
Even after Timon read "Psychedelics for Dummies," he was unable to produce LSD in the lab. He decided he would have to find a hallucinogen naturally. Therefore, he should look for which naturally occurring hallucinogen?
Answer:
The correct answer is - Psilocybin , Mescaline and LSD
Explanation:
Hallucinogens are various drugs or medications that change an individual's awareness with their environmental factors just as their own contemplations and emotions.
A hallucinogen is a psychoactive medication or drug that regularly or normally causes hallucination, perceptual peculiarities, and other significant subject changes in thought, feeling, and cognizance that are not ordinarily experienced to such degrees with different classes of medications. these could be synthetic or naturally occurring. The natural occurring hallucinogens are Psilocybin , Mescaline and LSD and other
Thus, the correct answer is - Psilocybin , Mescaline and LSD
What is produced at divergent plate boundaries?
a. Mountains
b. Oceans
c. New seafloor
d. Earthquakes
Answer:
new seafloor
Explanation:
Ari drew a diagram to show organisms in an ecosystem. What did Ari draw?
Answer:
food web
Explanation:
Food web is an interconnection and assimilation of different good chains. Many food chains are interlinked a hence a food web is created. This represents what is eaten by which organism. The diagram that Ari had drawn is a diagram of a food chain. The grass is the primary source of food in the food web. Rabbit, Mouse, and grasshopper are the animals that eat the grass. The grasshopper is eaten by a shrew and a mouse. The rabbit and shrew are then eaten by the fox. A mouse is eaten by a snake and a fox. This is the diagrammatic representation of a food web.
Answer:
food web
Explanation:
natural selection occurs at the organizational level to
Answer:
B) population
Explanation:
Acts on phenotypes on the individual level but evolution is at the population level. Microevolution is evolution at the population level
Hope it helps you
10.La respiración vegetal involucra un conjunto de reacciones celulares por las cuales carbohidratos sintetizados por la fotosíntesis son oxidados a C02 y H20. En este proceso, la energía liberada se transforma en Su mayoría en ATP y compuestos de carbono intermediarios precursores de la síntesis de aminoáci- dos y compuestos nitrogenados derivados, entre otros. Podemos deducir de lo anterior que en el proceso de crecimiento de las plantas, la fotosíntesis y la respiración A. Se complementan en beneficio del crecimiento de la planta. B. Son procesos independientes para asegurar la subsistencia de la planta. C. Se alternan para garantizar que la planta tenga energía en todo mo- D. Ocurren simultáneamente para que permanentemente.
Answer:
La opcion mas correcta seria : "Se complementan en beneficio del crecimiento de la planta"
Explanation:
En la respiracion de los vegetales o plantas, obtienen como resultado dioxido de carbono y agua, estos dos productos luego son utilizados en la fotosintesis para poder formar la unidad energetica que es la glucosa y asi generar el autoabastecimiento alimenticio.
Glycoproteins:___________.
a. contain unbranched oligosaccharides.
b. are a small fraction of the total number of proteins in a human cell.
c. are many of the cell surface and extracellular proteins.
d. have oligosaccharides covalently attached to aspartate residues.
Answer:
[tex]\boxed{Option \ D}[/tex]
Explanation:
Glycoproteins have oligosaccharides covalently attached to aspartate residues (type of amino acids) . They are not unbranched oligosaccharides.
Answer:
[tex]\boxed{\mathrm{Option \: D}}[/tex]
Explanation:
Glycoproteins have oligosaccharides covalently attached to aspartate residues.
They are proteins which contain oligosaccharide chains that are covalently attached to the amino acid side-chains.
What are molecular clocks used for
A- to cure hereditary disease
B- to classify
C- to locate fossils under water
D- to compare homologous structures
Answer:
D
Explanation:
Cocklebur will not flower if exposed to 8 hours of dark and 16 hours of light. It will flower if exposed to 16 hours of dark and 8 hours of light. However, if the 16 hours of dark is interrupted with a brief period of light the cocklebur will not flower. What triggers cocklebur to flower
Answer:
Photoperiodism
Explanation:
The process explained in the question is called "Photoperiodism" which refers to the plants' reaction to the length of the dark and light period in a day.
When the dark period is interrupted with a certain period of artificial lighting, the plant thinks that the day had a longer period where it's "light" than it is "dark" so it gets tricked into flowering. Same concept can be applied in reverse for the plants who flower during longer periods of dark.
I hope this answer helps.