Answer:
Choana, paired fins with a fleshy base over a bony skeleton, persisting notochord, 2 dorsal fins and nares.
Explanation:
Sarcopterygii also known as lobe-finned fishes which usually possess a choana, paired fins with a fleshy base over a bony skeleton, persisting notochord, 2 dorsal fins and nares are present internally. The lungfishes are considered the closest living relatives of tetrapods because of the presence of some common features. The African lungfish has epithelial crypts located at the base of the lamellae of the olfactory epithelium that express markers of the vomeronasal receptors in tetrapods.
................... controls metabolic activity of a cell?
enzymes control metabolic activity of cells
Our sun is classified as a: A. Main-sequence star B. Red super giant C. White dwarf D. Spiral galaxy
Answer:
Main Sequence Star
Explanation:
Answer:
The answer is A yw
Explanation:
Energy is released when:
A. Chemical bonds break
B. Chemical bonds are made
C. Both A and B are true
D. Neither A nor B are true
plz help quickly:
The diagram below shows the ways cells can release energy from food depending on whether oxygen is present.
Respond to the following:
What is the name for the top process (Hint: what is the term for a process that does need oxygen present to occur) ?
What is the name for the bottom process (Hint: what is the term for a process that does not need oxygen present to occur)?
How many ATP are produced at the end of the top process shown?
How many ATP are produced at the end of the bottom process shown?
Answer:
1. Aerobic respiration
2. Anaerobic respiration
3. 36 ATPs
4. 2 ATPs
Explanation:
According to the diagram attached to this question, the process of cellular respiration is described. Based on whether OXYGEN is present or not, cellular respiration can be divided into two:
- Aerobic respiration is the respiration that occurs in the presence of oxygen. As shown in the top process, aerobic respiration starts with glycolysis → krebs cycle → Electron transport chain (ETC). At the end of these three steps, 36 ATP molecules results.
- Anaerobic respiration is the respiration that occurs in the absence of oxygen. As described in the bottom process of the diagram, anaerobic respiration starts with glycolysis and enters alcoholic or lactic acid fermentation depending on which product is formed (alcohol or lactic acid). At the end of the process, only 2 ATP molecules is synthesized.
A que tipo de comunicacion celular se refiere, los factores de crecimiento son señales que secretan las celulas para estimular su propio crecimiento y proliferacion
Answer: Comunicación intracrina
Explanation:
La comunicación celular consta de un proceso en el que las células se comunican entre ellas y con el medio externo mediante señales físicas o químicas. Entonces, dichas células reciben, procesan y transmiten señales no solo con su entorno sino también consigo mismas. Las señales que se originan en el exterior de una célula que son agentes físicos pueden ser, por ejemplo, la presión mecánica, la luz, la temperatura, el voltaje, etc. Las señales químicas pueden ser moléculas como péptidos, gases, etc. Dichas moléculas de señalización pueden sintetizarse a partir de diversas vías biosintéticas y liberarse a través de transportes pasivos o activos. Estas señales van a ser detectadas por receptores, los cuales son proteínas en la superficie celular o en el interior de la célula que detectan las señales y producen una respuesta. Los receptores de la superficie celular suelen unirse a señales o ligandos extracelulares, lo que provoca un cambio conformacional en el receptor que le lleva a iniciar una actividad enzimática o a abrir o cerrar la actividad de un canal iónico para permitir o bloquear el transporte. Por otro lado, los receptores intracelulares, como los receptores nucleares, tienen un mecanismo diferente, como el cambio de sus propiedades de unión al ADN y la localización celular en el núcleo, regulando directamente la transcripción de genes y por lo tanto la regulando la expresión génica.
La señalización celular puede producirse a corta o larga distancia, por lo que puede clasificarse como autocrina, yuxtacrina, intracrina, paracrina o endocrina. La señalización autocrina implica que una célula secrete una hormona o un mensajero químico que se une a los receptores autocrinos de esa misma célula, lo que provoca cambios en la propia célula. En la señalización paracrina, una célula produce una señal para inducir cambios en las células cercanas, alterando el comportamiento de éstas. Las moléculas de señalización conocidas como factores paracrinos se difunden a una distancia relativamente corta (acción local), a diferencia de la señalización celular por factores endocrinos, donde las hormonas recorren distancias más largas a lo largo del cuerpo y a través del sistema circulatorio. La señalización yuxtácrina es un tipo de señalización entre células o entre una célula y la matriz extracelular que requiere un contacto estrecho, entonces se diferencia de la comunicación autócrina y endócrina en que estas últimas no requieren contacto. Y por último, la señalización intrácrina es un mecanismo de control del crecimiento que implica la acción directa de factores de crecimiento dentro de la célula. Algunos factores de crecimiento producen complejos factor/receptor en la superficie celular y son rápidamente internalizados por la célula en cuestión y translocados al núcleo sin degradación.
Un factor de crecimiento es una sustancia natural capaz de estimular la proliferación celular, la curación de heridas y, en ocasiones, la diferenciación celular. Por lo tanto, actúan como moléculas de señalización entre las células y pueden actuar sobre las mismas células que las producen y liberan. Entonces, si estos factores de crecimiento actúan sobre las mismas células que los secretan, se habla de un comunicación intrácrina.
cómo hacemos el arte se convierta en un dinamizador de una milpa
Answer:
hi
Explanation:
hi
Which is NOT a characteristic of all vertebrates?
a backbone
an exoskeleton
paired appendages
a well-developed brain protected by a skull
5. The atmosphere of early Earth is unlike today's atmosphere.
A. When did oxygen first appear in Earth's early atmosphere? (3 points)
B. What factor caused the appearance of oxygen? (3 points)
C. What is one form of evidence used to support this theory? (4 points)
Answer:
it's 5
Explanation:
today's atmosphere we enjoy today is radically different from the atmosphere that formed with the earth billions of years ago.
the small pine forest in which a rabbit lives is the rabbit's ______.
Answer:
Habitat
Explanation:
Which of the following is an example of a beneficial mutation?
When an organism's lifespan becomes shorter
when an organism's body becomes deformed
When an organism becomes unable to reproduce
When an organism develops immunity to a disease
Answer:
When an organism develops immunity to a disease
Explanation:
when organisms develop immunity than the organism become more comfartable to the enviroment
Lactic acid fermentation takes place after glycolysis in the absence of:
A. ATP
B. Carbon dioxide
C. Glucose
D. Oxygen
Answer:
Oxygen
Explanation:
Fermentation take place when there is a lack of oxygen in a cell. Without oxygen, the only process that can create ATP from glucose is glycolysis.
Answer:
its oxygen.
Explanation:
Fermentation take place when there is a lack of oxygen in a cell. Without oxygen, the only process that can create ATP from glucose is glycolysis.pls mark me as branliestAt a pH below 3.5, fats and hypertonicity in the duodenum decrease gastric motility by what mechanisms
Answer:
glucagon
Explanation:
Which of the two cells have a greater rate of cell division: a muscle cell or brain cell?
Which statement is a hypothesi
s?
Answers
A. I hear crikets in the summer, so crickets chirp more when its warm outside
B. Crickets are cooler than grasshoppers.
C. If the temperature increases, then crickets will chirp more.
D. Does temperature affect how much crickets chirp?
Answer:
C
Explanation:
A hypothesis is a tentative statement about the relationship between two or more variables. It is a specific, testable prediction about what you expect to happen in a study.
2 difference between pupa of honey bee and pupa of silkworm??
The larvae of a silk moth secrete the silk thread which is used to make clothes. Honey bees produce and store honey which is nutritious food. Silkworm is a creamy white colored insect which is about 2-3 cm long and shining in nature. Bee larvae have been shown to be an excellent food source for rearing insects
What is chromosome?
A: a type of organism that has genes
B: a form of gene that control a trait
C: a strand of genetic material
D: a specific trait that is passed on
Answer: B. A strand of genetic material
Explanation:
Its a thread like organism that carries DNA
______is the largest sac between small and large intestine were cellulose of food is digested .
_____ is the largest gland in human body.
______ is the enzyme present in saliva which act on starch food.
pls can u solve it :/
Answer:
1. its rumen
2. liver
3. enzyme amylase
Explanation:
Please mark me brainliest to answer more question
happy to help u
Which of the following is NOT a feature of ALL
cnidarians?
A. radial symmetry
B. cnidoctyes
C two body forms-medusa and polyp
D. three tissue layers
IN YOUR OWN WORDS, what is the definition for the words Zygote?
Zygote is the single cell formed from the fussion of male and female gamete.
ls Carbon dioxide needed for photosynthesis
Yes.
6CO2 + 6H2O → C6H12O6 + 6O2
Wrong answers will be deleted and reported.
Plz, help! Mild fever, chills, headache, and swollen glands are symptoms of:
1.)rubella
2.)influenza
3.)measles
4.)mumps
thank you for your help!
4.) mumps or Mononucleosis
Answer:
4 ) mumps or Mononucleosis
Explanation:
Which of the following is an example of an anabolic reaction?
A
citric acid cycle
B
fatty acid decarboxylation
C
glycolysis
D
photosynthesis
Which of these provides evidence from development biology of a shared evolutionary history ?
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the leg of the whale and the skeletal structure of it provides the evidence from developmental biology of a shared evolutionary history.
Answer:
D. The skeletal structures of a leg of a horse and a flipper of a whale are very similar.
Explanation:
(Will mark brainliest)
As you know, coronaviruses, influenza viruses, measles viruses, and rhinoviruses all encode RNA-
dependent RNA polymerases. All four of them introduce this gene into host cells. Two of them
ALSO introduce the RdRp enzyme. Which two? Why MUST they carry the polymerase protein in the
virus particle?
Answer:
In order to form more DNA molecules.
Explanation:
These viruses carry the polymerase protein in the virus particle because this protein synthesizes DNA molecules from deoxyribonucleotides. This formation of DNA molecule enables the virus cell to increase in their population. Each and every new cell of virus requires DNA molecules so we can say that this polymerase protein is very important and necessary for virus.
Which of the following best describes bacteriophage?
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A.A bacterium that obtains energy by feeding on other bacteria
B.A virus that infects bacteria
C.A virus that passes eukaryotic genes to prokaryotes
D.A bacterium that takes in free DNA from its environment
Answer:
b. A virus that infects bacteria.
How are all fungi and all protists alike?
Explanation:
Since plants and fungi are both derived from protists, they share similar cell structures. Unlike animal cells, both plant and fungal cells are enclosed by a cell wall. As eukaryotes, both fungi and plants have membrane-bound nuclei, which contain DNA condensed with the help of histone proteins.
Chang wants to build a circuit that will light up a bulb from a flashlight, and has a battery, switch, wire, and a light bulb.
Which component would Chang use as the source of energy?
the battery
the switch
the wire
the light bulb
The battery component would Chang use as the source of energy.
What is Battery?Batteries consist of one or more cells, each of which undergoes chemical processes to produce an electron flow in a circuit.
Each battery has three primary components: an anode (the "-" side), a cathode (the "+" side), and an electrolyte of some sort.
When the cathode and anode of a battery are connected to a circuit, a chemical reaction takes place between the anode and the electrolyte. Following this reaction, electrons return to the cathode and experience a second chemical change.
Therefore, The battery component would Chang use as the source of energy.
To learn more about Battery, refer to the link:
https://brainly.com/question/11670669
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What renal actions does angiotensin II have that are not related to its ability to produce vasoconstriction
Answer:
Angiotensin II is a main effector of RAS and is produced due to the release of the renin that forms in the kidney, angiotensin in turn stimulates the release of aldosterone from the adrenal cortex.
Angiotensin II serves various roles other than vasoconstriction to maintain blood pressure that are:
1. Autoregulation of GFR
2. Reduction of salt excretion through direct and indirect actions on renal tubular cells,
3. Growth modulation of renal cells - these express AT1 receptors.
Are there any combinations that give rise to both black and white-fur offspring?
Answer:
Two samezygous black(FF)
Plz answer my question i asked before this (plz, i will give brainliest to u if answered correctly)
Answer:
is that the one i answered already...
Explanation:
