The consensus is that the coelacanths and lungfishes (Sarcopterygii) represent an evolutionary link between ray-finned fishes and tetrapods. What is the major feature in the Sarcopterygii that supports this hypothesis?
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.
show the following
The unit of power is a derived unit
Answer:
watt is the SI unit of power
Answer:
yes it is a derived unit
Explanation:
P=W/T
work done is always in kgm/s
so therefore
P=kgm/s ÷ s
P=kgm/s × 1/S
P=kgm/s^2
OR
P=Kgms^-2
Which is the strongest claim for a presentation about the global problem of a lack of clean drinking water? It is interesting to note that 82% of people who lack access to improved water live in rural areas, while just 18% live in urban areas. Everyone deserves access to clean drinking water, but it is unlikely that this goal can ever be reached. The United States is one of the many countries that are very lucky to have access to well water, bottled water, and tap water. The lack of access to clean drinking water poses a serious health risk around the world, and funds must be raised to help achieve universal access.
Answer:
The lack of access to clean drinking water poses a serious health risk around the world, and funds must be raised to help achieve universal access.
Please help me with this on the picture
Define instar larva.
Answer:
For most insect species, an instar is the developmental stage of the larval forms of holometabolous (complete metamorphism) or nymphal forms of hemimetabolous (incomplete metamorphism) insects, but an instar can be any developmental stage including pupa or imago (the adult, which does not moult in insects).
Explanation:
The state of maintaining a stable internal environment regardless of changing external conditions is called
.
Answer:
homeostasis
Explanation:
Answer:
homeostasis
Explanation:
ik
urgent please answer
The correct answer is DNA WITHOUT HISTONES.
Explanation:
Prokaryotes are unicellular organisms without membrane-bound organelles. They lack a true nucleus. Instead, they have nucleoid, a genetic material without the nuclear envelope. In prokaryotes, the genetic material is single circular double-stranded DNA without histones. Thus, the correct answer is 'DNA without histones.'
Answer:
the correct answer is 'DNA without histones.'
Explanation:
Todos los miembros de dicha familia tienen simpatía por las mismas ideas políticas
Answer:
¿todos los miembros de dicha familia tienen simpatia por las mismas ideas políticas? En las últimas elecciones presidenciales, ¿todos los miembros de dicha familia votaron por el mismo partido?¿Puedes preguntarles cómo votaban los integrantes de esa familia hace veinte años, y hace cincuenta años? ¿Qué ha cambiado? Escribe en tu cuaderno tus averiguaciones
Explanation:
Mi familia tiene diferentes ideales políticos y por eso votaron por diferentes partidos, antes el proceso era manual
En las elecciones actuales les he preguntado a los miembros de mi familia y no todos votaron por el mismo partido político unos creen en uno de los partidos políticos y otros creen en otros. Por lo tanto no todos simpatizan con las mismas ideas políticas
Anteriormente se votaba por medio de un papel escrito, entonces el proceso es mucho más lento y menos automatizado que con maquinas
No, cada familiar tiene una idea política distinta.
-no votaron por el mismo partido político pues siempre algunos presidentes hacen promesas y no las cumplen.
-las votaciones siempre las han realizado por numero de DUI, en institutos o en las calles frente a las alcaldías, tenían que buscar el numero de urna en la cual estaban asignados.
-el cambio a sido la tecnología y el voto residencial, pues con la tecnología se ha hecho mas fácil el cuento de los votos y el voto residencial a permitido que se les facilite asistir al centro de votación.
In Florida, the building collapsed so far away that there was a cordon and no one was allowed to go near and police were standing guard. Is it weird that this kind of accident rescue doesn't let people get close?
In which order will free nucleotides add on to a single strand of DNA with the sequence ATTGCA during DNA replication? (2 points) O Uracil, adenine, adenine, cytosine, guanine, uracil Adenine, thymine, thymine, guanine, cytosine, adenine Thymine, adenine, adenine, cytosine, guanine, thymine O Guanine, cytosine, cytosine, adenine, thymine, guanine
Adenine, thymine, thymine, cytosine, guanine, and adenine is the correct order in which nucleotides add on single strand DNA.
What is DNA replication?The process of DNA replication is crucial for cells to divide and create an exact copy of their DNA. Enzymes like helicase play a vital role in unwinding and separating the two strands of the double helix, creating a replication fork that serves as the starting point for this process. As DNA polymerase adds nucleotides to the new strand using the existing strand as a template, it follows specific rules of complementary base pairing: adenine (A) pairs with thymine (T), while cytosine (C) pairs with guanine (G).
What will be order of nucleotides to add on single strand of DNA?During DNA replication, the order in which free nucleotides will add on to a single strand of DNA with the sequence ATTGCA is crucial. The correct sequence of nucleotides that will bind to this template strand is adenine (A), thymine (T), thymine (T), cytosine (C), guanine (G) and adenine (A). This follows the complementary base pairing rules where A pairs with T and C pairs with G. By following these rules, the newly synthesized strand will have a correct sequence of ATTTGC, ensuring accurate replication.
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why are virus considered to be nonliving
Questions for Activity 3: Making Molecular Models of Aerobic and Anaerobic Respiration
Text BoxDraw what you think the models of aerobic and anaerobic respiration would look like if you constructed them using models like in figures 3-6
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You are running a genetics experiment. Which of the following will help you obtain the copies of the gene you need?
A. Ribosome
B. Mesosome
C. Plasmid
D. Nucleus
Answer:
D
Explanation:
i think this is the answer because the nucleus contains threads of DNA called chromosomes.which can help in a genetic experiment.
I hope this helps
In the given context, Nucleus would help in obtaining the copies of the gene.
The nucleus controls and regulates the activities of the cell and carries the genes, structures that contain the hereditary information.
What is Nucleus?In cell biology, the nucleus is a membrane-bound organelle found in eukaryotic cells.
The nucleus was discovered by Robert Brown in 1831.
Nuclear DNA is a multiple long linear molecules in a complex with a large variety of proteins, such as histones, to form chromosomes. The genes within these chromosomes are structured in such a way to promote cell function.
The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression and thus control the center of the cell.
The main function of the cell nucleus is to control gene expression and mediate the replication of DNA during the cell cycle.
Nucleus houses an organism’s genetic code, which determines the amino acid sequence of proteins critical for day-to-day function, it primarily serves as the information center of the cell has been found that replication happens in a localized way in the cell nucleus.
What is Ribosomes?A ribosome is a complex molecular machine found inside the living cells that produce proteins from amino acids during protein synthesis or translation. The process of protein synthesis is a primary function, which is performed by all living cells.
Ribosomes are specialized cell organelles and are found in both prokaryotic and eukaryotic cells. Every living cell requires ribosomes for the production of proteins.
This cell organelle also functions by binding to a messenger ribonucleic acid (mRNA) and decoding the information carried by the nucleotide sequence of the mRNA.
They transfer RNAs (tRNAs) comprising amino acids and enter into the ribosome at the acceptor site. Once it gets bound up, it adds amino acid to the growing protein chain on tRNA.
What is Mesosome?Mesosome is formed by an extension of the plasma membrane into the cell wall. These extensions are usually in the form of vesicles, tubules, and lamellae.
The main use of mesosomes are:
- Synthesis of a cell wall.
- DNA replication.
- Distribution of daughter cells, respiration, secretions, etc.
What is Plastid?Plastids are double-membrane organelles which are found in the cells of plants and algae.
Plastids are responsible for manufacturing and storing of food. These often contain pigments used in photosynthesis and different types of pigments that can change the color of the cell.
Different types of plastids with their specialized functions are:
- Chloroplasts
- Chromoplasts
- Gerontoplasts
- Leucoplasts
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what can a person do to limit exposure to X-rays
Answer:
How can I reduce my exposure to radiation from X-rays?
Tell the X-ray technologist in advance if you are, or might be, pregnant.Ask if a protective shield can be used. ...Ask your dentist if he/she uses the faster (E or F) speed film for X-rays. ...Know your X-ray history.Which of these factors would most likely strengthen the effectiveness of
Answer:
Which of these factors would most likely strengthen the effectiveness of CITES?
Answer: Funding for on-the-ground enforcement
Which best describes a difference between transcription and DNA
replication?
Answer:
DNA replication involves synthesis of DNA molecules, while transcription is a process that involves synthesis of RNA molecules. In both processes, DNA acts as template and provides information for synthesis of new daughter DNA or RNA strand.
Explanation:
Which of the following is found in the 'rungs' of a DNA strand?
A. Phosphate
B. Thymine
C. Uracil
D. Deoxy Ribose
PLEASE HELP NEEDEDASAP
Answer:
My best guess would be the first option.
Explanation:
For example, when people began chopping down trees and making settlements in South America, fire ants started to move north in search for new homes. Eventually, they've became a huge problem to North America due to North America having no natural predators capable of eating these violent ants.
Answer:
Por ejemplo, cuando la gente comenzó a talar árboles y hacer asentamientos en América del Sur, las hormigas rojas comenzaron a moverse hacia el norte en busca de nuevos hogares. Con el tiempo, se han convertido en un gran problema para América del Norte debido a que América del Norte no tiene depredadores naturales capaces de comerse estas violentas hormigas.
GRACIAS
0
Explanation:
How does the Gulf Stream affect London?
O
A. It moves warm water north from the Gulf of Mexico during the winter, keeping the temperature constant year round.
0
B. The moving water causes lower air pressure which holds less moisture and reduces the precipitation that London
receives.
C. It moves warm water north from the Gulf of Mexico, making London warmer than it should be at its latitude.
D. It moves cool water north from the Gulf of Mexico, making London colder than it should be at its latitude.
Answer:
The Gulf Stream affects London because C. It moves warm water north from the Gulf of Mexico, making London warmer than it should be at its latitude.
Explanation:
If it weren't for the Gulf Stream, London would have the same climate as Canada rather than New York. This is why latitude is not the only factor for an area's average temperature throughout a certain time of a year.
How do membrane proteins contribute to the membrane potential?
Answer:
The proton pump results....
Explanation:
double checked my notes
Aquaporins result in a combination of positive charges intracellularly and negative charges extracellularly
What are Aquaporins?
Aquaporin is a group of membrane proteins found in cell membranes and selectively permit water to pass into and out of the cell. Also known as water channels, aquaporins are integral membrane pore proteins. Aquaporins are found in plants, bacteria and animals. They are observed in the vacuolar membranes and plasma membranes. The basic function of most aquaporin is to transport water across cell membranes in response to osmotic gradients created by active solute transport. Aquaporins enable passive transport which means they allow the movement of molecules across a cell without using energy.
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Name the 5 systems of the human body.
Answer:
Skeletal System
Muscular System
Circulatory System
Endocrine System
Digestive System
are systems of the Human Body
Explanation:
Answer:
Digestive system
Circulatory system
Respiratory system
Nervous system
Skeletal system
Identify the DNA in the cell from the diagram of the following process
Α.
В
C
B
Explanation:
option A is correct
hope this helps you
have a nice day
A) is your answer as it's inside the cell nucleus
The muscle weakness of myasthenia gravis results from loss of acetylcholine receptors in the end-plate membrane. the motor neuron action potential being too small to shock the muscle fibers. insufficient acetylcholine release from presynaptic vesicles. excessive acetylcholinesterase that destroys the neurotransmitter. All of the answers probably contribute to the muscle weakness.
Answer:
The correct answer is ''loss of acetylcholine receptors in the end-plate membrane.''
Explanation:
Myasthenia gravis represents a human autoimmune disease. The neuromuscular junction abnormalities that occur in this disease are due to antibody-mediated processes. A reduction in the number of functional acetylcholine receptors on the postsynaptic membrane was established to contribute to the physiological abnormalities of myasthenia gravis. The reduction in receptors is due to immunological alterations directed against the acetylcholine receptor. Normally, when acetylcholine binds to its receptor, it opens allowing the rapid entry of cations, especially sodium. With this, the depolarization of the postsynaptic region of the muscle fiber occurs. Although acetylcholine is normally released in myasthenia gravis, it is not capable of causing an action potential in the muscle sufficient to initiate or weaken contraction. In patients with myasthenia gravis, failure to activate muscles is responsible for myasthenic fatigue. Most patients have elevated serum titers of antireceptor antibodies, which in turn accelerate receptor degradation.
describe the process of digestion (20marks)
Answer:
The processes of digestion include six activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation. The first of these processes, ingestion, refers to the entry of food into the alimentary canal through the mouth.
Accessory organs: Liver: produces bile salts
Small intestine: Mixes chyme with digestive juice
Stomach: Mixes and churns food with gastric juice
Mouth: Ingests food; Chews and mixes food
Explanation:
What is the constant of “Which bait works best for a homemade fly trap?” Plz answer quick!!!!
Answer:
Mix scraps of meat (the older, the better) with something sweet (see list below). Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination.
Hope this helps!
Please give me brainliest if this helped you!
Answer:
Mix scraps of meat (the older, the better) with something sweet (see list below). Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination.
what traits could a plant that it would help it grow better in space
LED lights shine above to give the plants the energy they need to grow, and expandable plastic walls provide protection for the leaves as they get taller. So far, astronauts have just grown red romaine lettuce
Answer:
LED lights shine above to give the plants the energy they need to grow, and expandable plastic walls provide protection for the leaves as they get taller. So far, astronauts have just grown red romaine lettuce, but in the future, they will grow cabbage and tomatoes with seeds from the next SpaceX delivery.
Explanation:
Please Mark me brainliest
Binary Fission and Mitosis are similar processes. One way they are different is that: A. In Binary Fission, the DNA does not form into chromosomes. B. They both split by growing a new cell wall. C. In Mitosis, the DNA does not form into chromosomes. O D. Binary Fission only occurs in Eukaryotes.
Answer:
C. In Mitosis, the DNA does not form into chromosomes
Hi, can someone help me these few questions! Will mark as brainliest! Thanks
Answer:
a)the process is binary fission
b)The stages involved are:
The parent cell first grows bigger by increasing the amount of cytoplasm
the DNA replicates and the nucleus undergoes mitosis, resulting in the formation of two daughter nuclei
the cell membrane constricts thereby dividing the cytoplasm in two so that each nucleus is surrounded by it's own cytoplasm
the two daughter cells separate.
c)the advantage is that offspring take short time to mature
the disadvantage is that it leads to overcrowding and competition for resources.
I hope this helps
What kind of rock is this?
igneous
Where would this rock most likely be formed?
To which group of rocks would this rock belong?
Rocks can be classified based on texture. The
size of the grains in a rock affects its texture.
Coarse-grained rocks have large grains, and fine-
grained rocks have small grains.
Rocks formed from magma under Earth's surface
have larger grains than rocks formed from lava
on Earth's surface. This is because magma cools
slower underneath the ground than it does above
ground.
Metamorphic Rock Isua
Metamorphic rock, estimated to be as old as 3.8 billion years, located near Isua at Qorqut Sound, Greenland.
Answer:
What kind of rock is this?
✔ igneous
Where would this rock most likely be formed?
✔ underneath Earth’s surface
To which group of rocks would this rock belong?
✔ coarse-grained rocks
Explanation:
Just worked on this assignment
The increase in temperature with depth in the Earth is called the geothermal ____
Answer:
Geothermal gradient
Explanation:
Answer:
.energy..
Explanation:
