describe the cloacal aperture of frog.
Answers
Answer:
Cloacal aperture is the opening of the cloaca through this opening urine, undigested food, eggs, and sperms are passed away. ... Male and female frogs both have this aperture with their respective reproductive tract as a passway for sperms and eggs.
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Related Questions
how are sex linked traits determined
Answers
Answer:
A sex-linked trait refers to genes that determine a specific structural or functional characteristic and are found on an X or Y sex chromosome.
Explanation:
The X and Y sex chromosomes are what determine the sex of an individual, XY for male and XX for female. A sex chromosome-linked trait refers to specific genes located on one of the sex chromosomes.
In general, the X sex chromosome is capable of having more traits linked to it because it is larger than the Y chromosome.
Genes are what determine the morphological and functional characteristics of an individual. When specific genes are found on a sex chromosome, the traits that they determine will be given to the offspring through that chromosome.
Molecules that cannot move into the cell on their own,
because they are so large, can be transported across the
cell membrane into the cell by
Answers
Answer:
llkjhhggtyyggyygyydriethhiyvhtdg6etydyduehydjdhffyuejrutaakpagal dhhsyshhd8
which of the following would you classify as something other than an animal? A) sponge B) coral C) jellyfish D) choanoflagellate. D) choanoflagellate.
Answers
Answer:
D. choanoflagellate
Explanation:
Hope this helps!
Choanoflagellates are single-celled organisms that belong to the protist kingdom. They are commonly found in aquatic environments, both freshwater and marine. Choanoflagellates are characterized by their unique collar-like structure, which consists of a ring of microvilli surrounding a single flagellum.
The resemblance between choanoflagellates and certain cells found in sponges, known as choanocytes, has led scientists to propose that choanoflagellates are the closest living relatives of animals. Choanocytes are responsible for creating water currents and capturing food in sponges, and their similarity to choanoflagellates supports the theory of a shared evolutionary ancestry between these organisms.
However, despite their similarities to animal cells, choanoflagellates are not classified as animals themselves. Animals are distinguished by their multicellular nature, specialized tissues, and complex body plans. Choanoflagellates, on the other hand, are single-celled organisms that lack the level of complexity and differentiation seen in animals. They do not possess organs, nervous systems, or other animal-specific features.
Nonetheless, the study of choanoflagellates is valuable for understanding the evolutionary origins of animals and the transition from single-celled to multicellular organisms. By studying the similarities and differences between choanoflagellates and animals, scientists can gain insights into the processes that drove the evolution of complex multicellularity and the development of animal characteristics.
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Please help will mark brainliest and give 12 points
Answers
Answer:
anabalic (building up) : photosynthesism builds up molecules
catabolic (breaking apart): cellular respiration, helps cells multiply and stay in good condition (using energy to maintain the cells), complex molecules are broken down, energy is released
Explanation:
if one strand of a dna molecule has the sequence of nucleotides 5' attgca 3', what would the sequence of the complementary strand be?
Answers
Answer:
it would be 3’ taacgt 5’
9) Who is Carl Linnaeus?
a chemist who came up with a way to prevent invasive species
a biologist who came up with the current way of naming species
an author who wrote a book about the need for a different way to name species
a scientists who became the first to successfully clone a sheep
Answers
Answer:
a biologist who came up with the current way of naming species
Explanation:
hope this helps :)
Auxin moves between cells through a process called polar transport. Auxin molecules move from one cell to the next through pin proteins. However, their movement is unidirectional. What accounts for this unidirectional movement?.
Answers
From cell to cell (from one cell to another, and then to the next), carriers (a type of membrane transport protein) transport auxin molecules between adjacent cells, and the direction of flow is such that carriers cross the plasma membrane. is determined by where it is in the cell in question.
Transport from one cell to the next is achieved by a rather complex combination of various subprocesses. A so-called chemiosmotic model was developed to explain the processes underlying the different properties of auxin transport through living plant cell lines. Rubéry and Sheldrake first postulated the mechanism in his 1970s, and this prophetic prediction only came true in his 21st century.
The following mechanism explains how auxin is drawn into cells via so-called acid traps and can only exit when specific carriers are active. These carriers regulate the direction of cell flow and, more generally, the direction of auxin transport throughout the plant.
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When blood that is high in carbon dioxide exits the heart, it immediately enters which body system?
Answers
Answer:
The Circulatory System
Explanation:
When blood is rich in carbon dioxide it leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs. (All of which have to do with the circulatory system)
Which events take place in DNA replication?I. Formation of messenger RNAII. Unwinding of DNA double helixIII. Formation of complementary strands by DNA polymeraseA. I and II onlyB. I and III onlyC. II and III onlyD. I, II and III
Answers
The events that take place in DNA replication are II and III only: Unwinding of DNA double helix and Formation of complementary strands by DNA polymerase. Therefore the correct option is option C.
Formation of complementary strands by DNA polymerase: After the DNA strands are separated, an enzyme called DNA polymerase synthesises new complementary strands.
Using the old strand as a template, the polymerase adds nucleotides to the new strand in a complementary fashion.
Proofreading and mistake correction by DNA polymerase: DNA polymerase has a proofreading function that guarantees the new strands are correctly synthesised. If the polymerase detects an erroneous nucleotide, it can delete it and replace it with the proper nucleotide. Therefore the correct option is option C.
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Which of the following practices is considered an unsafe thawing method?
-thawing in the refrigerator
-thawing in cold water
- heating in the microwave
-thawing in the garage
Answers
which mineral is included in the composition of bone?
Answers
The mineral that is included in the composition of bone is hydroxyapatite
What is hydroxyapatite?While the chemical formula for hydroxyapatite is Ca5(PO4)3, it is more commonly written Ca10(PO4)6(OH)2 to indicate that the crystal unit cell consists of two entities. The complex apatite group's hydroxyl endmember is called hydroxylapatite.
Human bone and teeth include the inorganic mineral hydroxyapatite (HA). It contributes to both bone regeneration and bone structural strength.
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All of the following may be found in the walls of the respiratory bronchi except:
A. Smooth muscle
B. Surfactant-producing glands********
C. Goblet cells
D. Ciliated cells
Answers
Respiratory bronchi are the smallest branches of the bronchial tree and are responsible for transporting air to the respiratory zone of the lungs. "Surfactant-producing glands," is the correct answer to this question.
They differ from terminal bronchioles in that they contain alveoli in their walls. All of the following may be found in the walls of the respiratory bronchi except surfactant-producing glands. The respiratory bronchioles have smooth muscle, ciliated cells, and goblet cells in their walls.
The respiratory bronchi are the first set of tubes that carry air into the lungs. The respiratory bronchioles are the tiniest and final branches of the bronchial tree, with the alveoli contained within them. Therefore, the option B, "Surfactant-producing glands," is the correct answer to this question.
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MCO,
Name the acids present in unripe green apple
1. Malic acid
2. Tannic acid
3. citric acid
Answers
if an iv drop of only water was administered, would this make the bloodstream a hypotonic or hypertonic environment for the red blood cell?
Answers
Red blood cells swell and are more susceptible to hemolysis (rupture) when placed in a hypotonic solution. When placed in a hypertonic solution, red blood cells lose water and crenation (recruit).
What are hypotonic and hypertonic?In an osmosis system, there are known hypertonic solutions (solutions with a high solute concentration), hypotonic solutions (solutions with low solute concentrations), and isotonic solutions (two solutions having the same solute concentration).
Red blood cells that are placed in a hypertonic solution will experience cell crenation (shrinkage) because more water leaves the cell than enters. Erythrocytes when in a hypotonic environment, then osmosis will occur from the outside into the cell which will cause the cell to swell.
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write a bibliography
Answers
Answer:
bibliography is a list of the books and other sources that are referred to in a scholarly work-such as an essay, term paper, dissertation, or a book. The bibliography comes at the end of the work.
Explanation:
Which statement is part of the cell theory?
Cells vary in size and shape
All cells come from existing cells
Cells may be specialized to perform a specific function
Unicellular organisms are composed of a single cell
Answers
Answer:
3) Cells may be specialized to perform a specific function
the path of air resembles the path of blood in the circulatory system. it starts off with bigger tubes, and as it moves in deeper into the lungs, it goes through intensive and extensive branching to reach the site of gas exchange (alveoli). study the anatomy of the lungs and follow the path of air through the respiratory structures.
Answers
Air follows a branching pattern in the respiratory system, starting with larger tubes like the trachea and bronchi, and moving into smaller bronchioles before reaching the alveoli for gas exchange. This structure optimizes oxygen uptake and carbon dioxide release.
The respiratory system is responsible for the exchange of oxygen and carbon dioxide between the body and the environment.
The pathway of air in the lungs closely resembles the path of blood in the circulatory system, as it follows a branching pattern to maximize surface area for efficient gas exchange.
Air enters the respiratory system through the nasal passages or mouth and then travels through the pharynx and larynx. From there, it enters the trachea, a large tube reinforced with cartilage rings, which divides into two smaller tubes called the bronchi.
The bronchi further branch into smaller bronchioles, which continue to divide into even smaller respiratory bronchioles.
The respiratory bronchioles eventually lead to the alveoli, which are tiny air sacs surrounded by a network of capillaries. It is within the alveoli that the actual gas exchange takes place.
Oxygen from the inhaled air diffuses across the thin alveolar walls and enters the bloodstream, while carbon dioxide, a waste product, moves in the opposite direction to be exhaled.
This extensive branching of the airways in the lungs ensures that air reaches the alveoli, maximizing the surface area available for gas exchange.
The structure of the respiratory system optimizes the exchange of gases, providing the body with the oxygen it needs while eliminating carbon dioxide waste.
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Which microscope settings are used to view each of these images?
DONE
DONE
unaided eye
low-power objective
high-power objective
Answers
Answer:
low power
Unaided eye
High power
Explanation:
Answer:
the first person above is correct !!
Explanation:
i took their advice and did what they said to and i got it correct !! (for those of you who are wondering)
You are hired by Murphey Farms to decrease the backfat in their hogs. The current hog population has a mean backfat content of 18mm. You selected the hogs with the smallest amount of backfat, mated them and obtained the progeny generation. The selected hogs had a mean backfat content of 8. 6mm. The broad sense and realized heritibilities for percent backfat in hogs are 0. 82 and 0. 38 respectively.
a) What is the selection differential? Round your values properly to 2 decimal digits.
b) What is the expected response to selection? Round your values properly to 2 decimal digits.
c) What is the expected mean of the progeny generation? Round your values properly to 2 decimal digits
Answers
Therefore, to decrease the backfat in Murphey Farms' hogs, selecting the hogs with the smallest amount of backfat and mating them is expected to result in a progeny generation with an average backfat content of 5.028mm.
a) The selection differential is the difference between the mean backfat content of the selected hogs and the mean backfat content of the original population.
Selection differential = 18mm - 8.6mm = 9.4mm (rounded to 2 decimal digits)
b) The expected response to selection is the proportion of the selection differential that is heritable and can be passed on to the progeny generation.
Expected response to selection = selection differential x realized heritability
Expected response to selection = 9.4mm x 0.38 = 3.572mm (rounded to 2 decimal digits)
c) The expected mean of the progeny generation is the mean backfat content of the selected hogs minus the expected response to selection.
Expected mean of progeny generation = selected hogs mean - expected response to selection
Expected mean of progeny generation = 8.6mm - 3.572mm = 5.028mm (rounded to 2 decimal digits)
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What do aerobic respiration and anaerobic respiration have in common?
• Both begin with glycolysis.
• Both occur in mitochondria.
• Both require oxygen to proceed.
• Both end with the electron transport chain.
Answers
Answer:
Both occur in mitochondria
Explanation:
Respiration occurs in the power house called mitochondria
No matter whether aerobic or anaerobic respiration, they both generate 4ATP and consumed 2 ATP during glycolysis + NADH.
The difference is that under aerobic respiration, pyruvate can enter the mitochondrial matrix following the aerobic respiration pathway whereas, without the supply of O2, anaerobic respiration takes place and forms different products in accordance to which type of organisms they are (I.e. In plants we will have CO2 and ethanol where in human we have lactic acid)
Other enzymes cause chemical changes in fats. Still others change______?
Answers
Answer:
quickly
Explanation:
they just do
Which best describes Jodi’s error? The movement of electrons is not always continuous. Electrons move from areas of high to low electric potential. Resistance causes current to flow. The rate at which current flows is measured in ohms.
Answers
Answer: D. Rate at which current flows is measured in amperes
Answer: B. Electrons move from areas of high to low electric potential.
Biology True or False need help ASAP
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Answer:
f
t
t
f
t
f
t
t
t
f
Explanation:
here you go u think it should be right
human and fish embryos share a number of features. why is this?
a. Mutations in human and fish embryos have caused them to look alike
b. Humans and fish have exactly the same genes, but as they develop, different genes are turned on in fish than in humans
c. Embroys of all organisms, plant and animal, look alike
d. Humans and fish share a common ancestor
Answers
D. Humans and fish share a common ancestor. It is believed that long ago, fish and humans shared a common ancestor, which explains why their embryos have a similar structure. Over millions of years of evolution, mutations in human and fish embryos caused them to look different as they develop into adulthood.
During the early stages of embryonic development, all vertebrates, including humans and fish, share similar features such as pharyngeal pouches and a tail. This is because they all evolved from a common ancestor and have inherited similar developmental genes. As the embryo continues to develop, these features will differentiate and result in the distinct physical characteristics of each species.
It is not accurate to say that mutations in human and fish embryos have caused them to look alike (option a), or that humans and fish have exactly the same genes (option b), or that embryos of all organisms look alike (option c). These options do not accurately explain the shared features between human and fish embryos.
The correct answer is option d. Humans and fish share a common ancestor.
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Is Shibuya City a marine or continental environment?
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Answer:
Well, Shibuya City is located in the Tokyo Metropolis of Japan and since it is an urbanized area, it is an continental environment.
only bones form fossils
true or false
quick pls !!
Answers
The blood does all of the things below except one. Which one does the
a. Carries oxygen to all the cells
b. Delivers glucose to all the body's cells.
c. Break down food
d. Helps the body to fight disease with white blood cells
Answers
Answer:
C break down food.
Explanation:
The blood does carry oxygen and delivers glucose. It also helps fight disease with white blood cells
so the only option left is C. Break down food; which the digestive system does.
The stimulation of the heartbeat begins in the _____, which is why this structure is called the pacemaker of the heart.
Answers
The stimulation of the heartbeat begins in the sinoatrial node (SA node), which is why this structure is called the pacemaker of the heart.
What is the pacemaker of the heart?
The pacemaker of the heart is a small group of cells present in the right atrium of the heart called the sinoatrial (SA) node.
The SA node produces electrical signals that start each heartbeat, ensuring that the heart contracts regularly and at a pace appropriate for the body's requirements.
The heartbeat is stimulated by the electrical signals generated by the sinoatrial node (SA node) in the right atrium. When the SA node produces an electrical impulse, it travels through the heart's conduction system to the atrioventricular node (AV node) and then to the ventricles, causing the heart muscle to contract and pump blood throughout the body.
Thus, the Sinoatrial node (SA node) is the Pacemaker of the heart.
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Hey Guys I Was Wondering How Many Likes I Would Get If I Said----------------------------------
MERRY CHRISTMAS TOO ALL YOU WONDERFUL RAINDEERS
Answers
Im not sure but merry Christmas to you wonderful reindeer tooooo
hey i don’t understand this , i need help
Answers
Answer:
I think D but I'm not entirely sure.
Answer:
D
Explanation:
Because other choises are physical like melting, dissolves in water, and feels slippery in water.