Hợp chất thứ cấp là các chất không có chức năng trực tiếp trong các quá trình đồng hóa, hô hấp, vận chuyển, tăng cường và phát triển thực vật. Chức năng chủ yếu của các hợp chất thứ cấp là bảo vệ thực vật chống lại các tác nhân gây bệnh và động vật ăn cỏ. Nhiều chất thứ cấp có hoạt tính sinh học mạnh được dùng làm chất diệt côn trùng, nấm, dược chất. Hợp chất thứ cấp được phân làm ba nhóm chính ở thực vật: Các terpen, các hợp chất phenolic và các hợp chất chứa Nitrogen.
What molecules transfer heredity from parents to offspring?
Answer:
a molecule called DNA (deoxyribonucleic acid) is passed from adult organisms to their offspring during reproduction.
DNA molecules transfer heredity from parents to offspring.
What is DNA?DNA or deoxyribonucleic acid exists considered the genetic material that transmits genes from Parents to offspring. DNA exists found almost inside every cell. The molecular structure of DNA existed discovered by James Watson and Francis Crick in the year 1953. They obtained Nobel Prize for it in the year 1962.
DNA exists created up of molecules called nucleotides. Each nucleotide contains three elements: a phosphate group, which stands for one phosphorus atom bonded to four oxygen atoms; a sugar molecule; and a nitrogen base.
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What is an ecosystem?
Our understanding of many of the evolutionary relationships among animals changed after those phylogenies were based on morphological and molecular data (as opposed to only using morphological data). Which of the following groups represents an example of this change?
a. Lochotrophozora
b. Bivalvia
c. Brachiopoda
d. Placozoa
Answer:
a. Lochotrophozora
Explanation:
Molecular research and studies complement morphological research and improve our awareness and knowledge of evolutionary history. Previously, morphological studies could only reveal to us the variations and distinctions, but molecular studies and phylogeny have enabled us to pinpoint the fundamental mechanism of this variation on a genetic level, as well as locate it down to evolutionary lineage, which has led to more enhanced genealogy and evolutionary studies.
However, the group of organisms that best reflects and represents this kind of change is: Lochotrophozora
Groups represent an example of this change is option "A" which is Lochotrophozora.
What is Lochotrophozora diversification?Lophotrochozoa is a monophyletic group of animals that includes annelids, molluscs, bryozoans, brachiopods, Platyhelminthes, and other animals that descended from the common progenitor of these organisms.
Lophotrochozoa is one of the three major clades that include bilateral animals, or Bilateria.
Thus, option "A" is Lochotrophozora.
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Two of the five types of taste buds are activated by directly hypopolarizing the taste buds; i.e. do not involve a second-messenger pathway. The tastes that activate these receptors are:
Answer: salty and sour
Explanation:
Taste buds consist of the taste receptor cells and they're the nerve endings on the tongue that provide the sense of taste.
Based on the information given, the tastes that activate these receptors are salty and sour. The tastes depolarize the cell receptor directly.
Las semillas de las plantas, especialmente las más consumidas en nuestra dieta como el trigo, el maíz, el arroz y otros cereales o las lentejas, los porotos y otras legumbres, tienen un depósito de almidón que está destinado a alimentar el embrión en las primeras etapas del desarrollo, hasta que esté en condiciones de hacer la fotosíntesis por sí solo. ¿Con qué función de los lípidos se relaciona esta adaptación? Justificar.
Answer:
lol I dont know the answer
a scientist is is using a microscope to observe a type of bacteria
Answer:
If your question is: Which two structures would the scientist most likely see? Then:
A scientist is using a microscope to observe a type of bacteria. The scientist most likely see cell wall and vacuole.
What is NOT an effect of growth hormone?
a. Growth hormone directly stimulates osteoblasts in the periosteum to promote appositional growth.
b. Growth hormone increases the rate of mitosis in the epiphyseal plate of growing bones.
c. Growth hormone promotes the closure of the epiphyseal plate.
d. Growth hormone increases the activity of osteogenic cells.
C. Growth hormone promotes the closure of the epiphyseal plate.
The closure of the epiphyseal plate is NOT an effect of growth hormone (option c).
The epiphyseal plate is a layer of hyaline cartilage between the epiphyses and metaphyses at the ends of long bones.
The epiphyseal plate is completely closed when bone growth is completed (around age 18 to 21 years).
Different hormones (i.e., testosterone and estrogen) released at puberty initiate the closure of epiphyseal plates.
In conclusion, the closure of the epiphyseal plate is NOT an effect of growth hormone (option c).
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Which best explains why sawdust burns more quickly than a block of wood of equal mass under the same conditions?
The molecules move more quickly in the sawdust than in the block of wood.
The pressure of oxygen is greater on the sawdust.
More molecules in the sawdust can collide with oxygen molecules.
Oxygen is more concentrated near the sawdust than the block of wood.
Which best explains why, under the same circumstances, sawdust burns more fast than a wood block of equivalent mass The molecules in the sawdust move more swiftly than those in the
A thermal burn is what?
An injury to the skin or other organic tissue known as a burn is one that is primarily brought on by heat, radiation, radioactivity, electricity, friction, or contact with chemicals. When hot liquids, heated solids, or flames come in touch with the skin and other tissues, part or all of the skin's cells are destroyed (flame burns)
What various sorts of Burns are there?
This tiny burn merely penetrates the skin's surface layer (epidermis). It might hurt and make you red. second-degree burn Both the epithelium and the next layer of skin are affected by this kind of burn (dermis). It could result in skin that is swollen, red, white, or patchy. The pain may become intense and blisters may form. Scarring may result from second-degree burns that are deep.
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Answer:
C.More molecules in the sawdust can collide with oxygen molecules.
Explanation:
real
All claims in science should be supported by biology
Answer:
yes
Explanation:
Because science &biology have a connection
Which group of bacteria reduces nitrate to nitrogen gas in the nitrogen cycle? Nitrogen fixing bacteria C. denitrifying bacteria Ammonium ion forming bacteria D. photosynthetic bacteria
Answer:
C. denitrifying bacteria
Explanation:
Nitrogen cycle consists of series of processes that add and remove nitrogen from the soil and atmosphere. There are several ways in which nitrogen can be added to the atmosphere including nitrification, ammonification, lightning etc.
Certain bacteria are responsible for the conversion of nitrogen from one compound form to another. In a process called DENITRIFICATION, nitrate (NO3-), which is the usable form of nitrogen by plants, is converted back to atmospheric nitrogen (N2) with the help of a bacteria called DENITRIFYING BACTERIA e.g Pseudomonas etc.
When blood pH becomes overly acidic, respiration and kidney function change to bring the acidity back to its normal pH level of 7.4. What does this process best exemplify
Answer:
homeostasis
Explanation:
Homeostasis has to do with processes that maintain the internal balance within an organism. It can succinctly be defined as the process of regulating an organism's internal environment. The process of homeostasis is very important in the maintenance of important indicators of balance in the body such as body temperature, body pH, etc.
Hence, when blood pH becomes overly acidic, respiration and kidney function change to bring the acidity back to its normal pH level of 7.4. This is a homeostatic response.
Which process produces a phase change for water molecules? What is the factor that drivers this process?
Explanation:
I think this is the answer i try to do it
Sell
BIOL-041-CR: Biology, Part 1 / Unit 1: Biology: The Study of Life /12: Cha
3. What is the name of the process whereby some organisms are able to keep their internal conditions suitable for living?
homeostasis
O reproduction
Ο Ο Ο Ο
O photosynthesis
O metabolism
4. In order to keep a steady population, animals in a population must reproduce at a rate that is at least equal to
O the rate of deaths
twice the number of births from the previous year
O the current population
O half the number of deaths
Answer:
3) homeostasis
Explanation:
is the process where by some oranism keep their internal conditions suitable for living
A biologist thinks the population of chipmunks will be in the range of 2900 to 3100 in the year 2000. Is that a reasonable guess? Why or why not?
Answer:
No
Why not:
The midpoint of range is 3000. Yes, in from 1950-1955 there was a massive increase of the population of chipmunks but from then on it slowly decreased until 1990. In 1995, the population doubled from 1990. If you double 1440, you will get 2880. The biologist said between 2900-3100, using the midpoint of this range (3000) it is too low therefore being a bit unreasonable.
Hoped it is correct and helped you!
Which of the following is correct?
Select one:
a. Industry and agriculture both overuse surface water resources.
b. Industry and agriculture both overuse groundwater resources.
c. Industry overuses surface water and agriculture overuses
groundwater.
O d. Industry overuses groundwater and agriculture overuses
surface water
Water is a source that is used for various purposes. The industry overuses the surface water, whereas agriculture overuses the groundwater leading to water scarcity. Thus, option C is correct.
What is water scarcity?Water scarcity is the unavailability of water or can be said as a shortage of water through the regular supplies due to the overuse and excess waste of these resources.
The lack of sufficient amount of water that has been said to be not equal to the demand is a major issue that affects every organism globally. It can lead to economic decline as there will be drought.
Water is used in various fields including the industries for machines and other works, and also in agriculture fields to grow plants and crops. The industry uses the water present on the surfaces like lakes, and rivers, while crops need the water from the wells.
Therefore, option C. the industry and agriculture overuse water.
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Innate talents or gifts enhanced through study and practice are:
A-drawbacks.
B-Holland's occupational types.
C-priorities.
D-abilities.
Innate talents or gifts enhanced through study and practice are abilities. The correct option is D.
What are innate talents?Innate talents are those talents that are present in the organism from birth, They are not learned or observed from outside. These abilities are only enhanced as we grow up. They are already present in the body.
They are the natural, talents that with we grow up. Innate talents are also called natural skills. They are genetically present in our bodies. Some people are born with natural potential and skills. But without hard work and practice, these skills would not work.
Abilities are the things that are used by the organism to perform activities. Every organism has some abilities.
Thus, the correct option is D. abilities.
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How is the evidence for the multi-regional theory of migration supported?
Which of the following is the best definition of anaerobic respiration?
Answer:
C.
Explanation:
Anaerobic respiration is a process of cellular respiration. In this type of cellular process of respiration, oxygen is not needed to break down complex food substances such as glucose. Energy is generated in the process which is used for other cell functions.
Therefore, the answer is C.
Please help!! Answers!!! I Need The Right Answer!! A group of scientists studied the environmental impact of internal combustion engines burning hydrocarbon fuels. The scientists equipped four vehicles with devices to capture and measure particulate emissions. One vehicle burned diesel fuel, one burned ordinary gasoline, one burned a gasoline/ethanol mixture, and one burned natural gas. The four vehicles had equal masses and carried identical cargo. The scientists drove each vehicle 400 kilometers, recording the volume of fuel burned and the quantity of particulate emissions generated.
What is the independent variable in this experiment?
A.
type of fuel
B.
distance traveled
C.
mass of vehicle and cargo
D.
quantity of particulate emissions
Answer:
A. type of fuel
Explanation:
The scientists combusted different types of hydrocarbons (different type of fuel)
Select the correct answer
Which term refers to the maximum number of organisms of a particular species that can be supported by an environment?
OA Population density
OB Exponential growth
OG carrying capacity
Answer:
Carrying capacity
Explanation:
Carrying capacity means the number of organisms that a region can support without environmental degradation.
Match each of the following descriptions with the correct brain structure(s). Drag the terms on the left to the appropriate blanks on the right to complete the sentences.
a. houses the corpora quadrigemina
b. components of the diencephalon
c. connects the third and fourth ventricles
d. continuous with the spinal cord
e. produces cerebrospinal fluid
f. components of the brainstem
g. major homeostatic organ
h. contains Broca's area
i. structure from which pineal gland extends
j. contains lateral ventricles
k. contains arbor vitae
1. pons
2. thalamus
3. cerebellum
4. hypothalamus
5. cerebral aqueduct
6. medulla oblongata
7. midbrain
8. epithalamus
9. cerebrum
10. choroid plexus
Answer:
a. midbrain
b. thalamus; hypothalamus, epithalamus
c. cerebral aqueduct
d. medulla oblongata
e. choroid plexus
f. pons; medulla oblongata; midbrain
g. hypothalamus
h. cerebrum
i. epithalamus
j. cerebrum
k. cerebellum
Explanation:
The brainstem is the posterior part of the brain that connects the cerebrum with the spinal cord. The brainstem can be divided into three parts: midbrain (i.e., mesencephalon), the pons (i.e., metencephalon), and the medulla oblongata (i.e., myelencephalon). The mesencephalon is a region of the brain composed of the tectum and tegmentum, which play fundamental roles in motor movement, auditory and visual processing. The corpora quadrigemina is found at the tectum region of the midbrain. The diencephalon is a small part of the brain located above the brainstem (between cerebral hemispheres); which contains the thalamus, hypothalamus, subthalamus, and epithalamus. In turn, the epithalamus is composed of the habenular nuclei, pineal gland, and the stria medullaris thalami. The cerebral aqueduct is a narrow channel (approx. 15 mm) in which the cerebrospinal fluid flows between the third ventricle and the fourth ventricle. The medulla oblongata is a long stem-like structure located in the brainstem of the brain, just in the place where the brainstem connects the brain to the spinal cord. The choroid plexus is a complex network of capillaries located at the cerebral ventricles of the brain, which serve to produce cerebrospinal fluid through ependymal cells that line the ventricles of the brain. The cerebellum is a major structure of the hindbrain and consists of the cerebellar cortex and a core of white matter having the cerebellar nuclei.
Answer this question properly
Answer:
Hindi ko alam heheeExplanation:
ssorry ponumber of chiasmata during the stage of diakinesis:
a) increases
b) decreases
c) remains the same
d) there is no kiazma
Explain the answer
Answer:
a because it harm the people
what type of feature might be observed at this location?
Answer:
at what location? the question isnt finished
Which tool is a meteorologist most likely to depend on to collect information from the
upper atmosphere?
Answer:
Anemometer is the most likely meteorologist to collect information from the high atmosphere.
Explanation:
A device to measure wind velocity and direction is an anemometer. It's also a common meteorological tool. The name comes from the Greek phrase anemos that means wind and is used to designate any meteorological wind speed instrument.
Anemometer uses
The anemometer is used for the following purposes other than to measure the wind speed:
For wind pressure measurementIn order to measure wind flowMeasuring the wind directionIt is used to assess weather conditions before testing its gadgets by drone users or RC aircraft usersUsed also by snipers and pilots of long-rangeSkydivers are used to assessing wind speed before they spring into the abyss.Used to measure airspeed in aerodynamicsAnswer:
weather balloon
Explanation:
Below is a mature eukaryotic mRNA transcript. Translate this mRNA into a protein, also showing the tRNA anticodons involved. Make sure you start and end translation in the right place! Label the ends of the polypeptide chain as N and C terminus.
mRNA: 5'GMUUACAUGCGGCUCAGUUGAGGCGAAAAAA 3'
tRNA:
amino acids:
Answer:
mRNA ⇒ 5'GMU UAC AUG CGG CUC AGU UGA GGC GAA AAA A 3'
tRNA ⇒ UAC GCC GAG UCA ACU
protein ⇒ N - MET ARG LEU SER Stop - C
Explanation:
In protein synthesis, the ribosome reads mRNA in the 5´ to 3´ direction, and, according to the codons that are being readen, tRNA transfers the correct amino acids to build the polypeptide chain. A codon is a short sequence of three nucleotides that store the genetic information for the aminoacids´ assembly. Each tRNA has two important sites. One of them that couples with the codon of the mRNA molecule, named anticodon. The other site couples with an amino acid. tRNA allows amino acids to align according to the nucleotidic sequence in the mRNA molecule.
Once the new amino acid links to the growing peptidic chain, the binding between the amino acid and the tRNA molecule breaks. The tRNA is now free to join another amino acid and repeat the cycle.
The protein is synthesized from the amino terminus to the carboxy terminus, while the added amino acids to the chain are coded by a codon formed by three bases in the mRNA. mARNs also have a start and end codon that are the signals of the synthesis initiation and finish. When the ribosome reaches the end codon, protein synthesis is over.
Each of the codons represents one of the 20 amino acids used to build the protein. Each amino acid can be codified by more than one codon. From the total 64 codons, 61 codify amino acids, and one of them is a start codon. The left three codons are stopping translation points.
The codons indicating the initiation or stop points during the translation process are:
• The start codon AUG is the most common sequence used by eukaryotic cells and places near the 5´extreme of the molecule.
• The end codons are UAA, UAG, UGA.
Protein synthesis initiates in the AUG start codon -Metionin-, and ends when reaching either of the stop codons UAA, UAG, UGA.
In the exposed example we have the following mRNA.
mRNA ⇒ 5'GMU UAC AUG CGG CUC AGU UGA GGC GAA AAA A 3'
Codons are separated by a space left between them. AUG is the start codon placed near the 5´ extreme. UGA is the end codon near the 3´ extreme. tRNA will add amino acids from the start codon, not before.
tRNA ⇒ UAC GCC GAG UCA ACU
Anticodons are separated by a space left between them.
protein ⇒ N - MET ARG LEU SER Stop - C
Each mRNA codon codifies for an amino acid. The start codon codifies for methionine. AUG = Met, CGG = Arg, CUC = Leu, AGU = Ser, UGA = Stop codon. The amino terminus is represented as an N and the carboxy terminus is a C. The first extreme to be translated carries the amino-terminal group, while the other extreme carries the carboxy-terminus group.
define cell and atom.....
Answer:
cells are the basic building blocks of all organisms , whether living or dead.
atoms are the basic building blocks of matter(non-living things) . every item , for eg, chair, book, toothbrush are made of atoms?
Which of the following is correctly defined?
A. Ecosystem - A group of conspecific organisms.
B. Population - An individual life form.
C. Community - A group of populations.
D. Population - A group of communities.
I need help!!1
Answer:
both b and c I think..........
Population - An individual life form. and Community - A group of populations.
What is population?A population is the entire set of people in a group, whether that group is a country or a collection of people who share a certain trait.
A population is the group of people from which a statistical sample is taken in statistics. Therefore, a population is any collection of people who have something in common.
A statistically significant portion of a population, rather than the full population, may also be referred to as a sample. For this reason, the standard deviation, or standard error, of a statistical study of a sample from the full population must be disclosed.
Therefore, Population - An individual life form. and Community - A group of populations.
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And here is another one, help meeeee HUHUHU, I'm exhausted (only for those who know the answer)
I need explanation for your answers, even though it's multiple choices, I still need your explanation for it.
DUE TOMORROW!
If your answer is NONSENSE it will be deleted as soon as possible!
But if your answer is CORRECT, HELPFUL, HAS AN EXPLANATION, I'll chose your answer as the BRAINLIEST ANSWER!
Answer:
14. (a) Pb
15. (d) Al
16. (A) increases
Explanation:
14.
In the reactivity series of metals an element can displace another element from a compound if and only if it is not placed below that metal, as the reactivity of metals decreases when moving from top to bottom- if a metal is placed below Hydrogen it means that it is less reactive than Hydrogen and hence cannot displace Hydrogen from its compound.
All options except A are placed below Hydrogen in the reactivity series, so they wont displace Hydrogen from its compound, but option (a) that is Pb can do so as it is above Hydrogen in the reactivity series.
15.
Al is placed below Mg in the reactivity series and hence cannot displace Mg from its compound.
16.
The reactivity of metals increases down the GROUP.
[CAUTION :- We were talking 'bout REACTIVITY SERIES in the top 2 questions where reactivity decreases down the group, but we're talkin' 'bout GROUPS of the periodic table here, where reactivity increases down the group.]
The size of metals increases down the group causing their valence electrons to drift far from the nucleus so that they can be lost easily. The metals have a property of losing electrons so the more electrons it can lose more will be its reactivity.
Hence, reactivity increases down the group.
A degraded ecosystem is replaced with a different but productive ecosystem type, one that might even include some nonnative species. For example, a degraded forest might be replaced with a productive pasture.a. passive restoration b. remediation c. partial restoration d. rehabilitation e. complete restoration
Answer:
d. rehabilitation
Explanation:
Technology-associated rehabilitation is an ecological practice that allows a degraded area to be restored, rehabilitating all its degraded habitats. However, this restoration is not done naturally, but is caused by human intervention, which can cultivate the entire plant population in the area, even adding non-native species, which are selected to leave the productive area, but ecologically harmonious.
