In developing follicles of the mammalian ovary, the thecal cells secrete testosterone. If the granulosa cells of a follicle are unable to convert this testosterone to estrogen, they will not express enough FSH and LH receptors to allow for follicle maturation and ovulation.
What are Developing follicles?Female mammals, including humans, have developing follicles in their ovaries, which are tiny sacs filled with fluid. The immature egg, or oocyte, found in each follicle is encased in layers of specialized cells, comprising thecal cells and granulosa cells.
Under the influence of hormones like follicle-stimulating hormone (FSH) and luteinizing hormone (LH), these follicles develop and mature until one dominant follicle is chosen for ovulation. Normal reproductive function depends on the complex process of follicle formation and maturation.
Therefore, in developing follicles of the mammalian ovary, the thecal cells secrete testosterone. If the granulosa cells of a follicle are unable to convert this testosterone to estrogen, they will not express enough FSH and LH receptors to allow for follicle maturation and ovulation.
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Which of the following cell membranes is the most fluid?
Membrane A, because it is composed of saturated fatty acids that have one or more cis bonds that form stable aggregations
Membrane A, because it is composed of saturated fatty acids that lack weak hydrogen bonds that continually break and reform to permit macromolecule movement
Membrane B, because is it composed of unsaturated fatty acids that form weak covalent bonds at the site of their cis bonds, which permit easy movement
Membrane B, because it is composed of unsaturated fatty acids that have one or more bends, which prevent tight packing
Answer:
Membrane B, because it is composed of unsaturated fatty acids that have one or more bends, which prevent tight packing.
As compared to the circulatory system of most fishes, the circulatory system of adult amphibians has the advantage of a single circuit. partially-separate circuits for gas exchange and systemic delivery of blood. complete separation between oxygenated and deoxygenated blood. a four-chambered heart. a pocket of the gut that serves as an air bladder.
Answer:
Partially separate circuits for gas exchange and systemic delivery of blood.
Explanation:
Adult amphibians have separate circuits for gas exchange and systemic delivery of blood. Fishes usually breathe through gills and very few have nostrils. The fishes can breathe underwater with the help of their gills.
Số lượng tế bào vi khuẩn E.Coli sau nuôi cấy thu được 32.104 tế bào. Thời gian để VK phân chia tăng số lượng tế bào, biết số lượng tế bào ban đầu cấy vào là 104, thời gian thế hệ của VK ở 400C là 20 phút.
what are the different experiments and variables you can use to test your hypothesis
Answer:
the most common variables found in a science experiment include dependent, independent, and controlled.
Explanation:
Why was the scientific method developed?
Group of answer choices
to help scientists avoid religious disputes
to help scientists organize the process of solving problems
to confirm ancient facts about the Earth
to develop scientific laws that no one could argue with
Answer:
Its B
Explanation:
It just is
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If a scientific journal article is difficult to understand in its entirety, what is the best resource for comprehending the overall study
and results?
Answer:B an abstract of the study
Explanation:
What can differentiate between multiple layers of the ocean floor?
sonar
magnetic imaging
x-ray
seismic reflection
Explanation:
seismic reflection is the answer
please help me out, name all 3 parts of the atom.
In the atom, the arrow 1 depicts the proton. The arrow 2 depicts the neutrons, and the arrow 3 depicts the electrons. All three of these are subatomic particles.
What is an atom?An atom is the fundamental structural unit of matter. It consists of protons, neutrons, and electrons. Electrons are negatively charged particles that are present outermost shell of the atom, while protons are positively charged particles that make up the core of the atom. The neutron doesn't have any charge.
Both neutrons and protons make up the core of an atom, while electrons revolve around them. A neutral atom has equal numbers of protons and electrons. Example: the sodium atom.
Hence, the atom showing arrow 1 is a proton, arrow 2 is a neutron, and arrow 3 is an electron.
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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.
How can ecological factors influence in pond ecosystem? Discuss it with suitable examples with respect to its structural and functional aspects?
The ecological factors influence in pond ecosystem by providing the basic structure and materials that the ecosystem needed.
Oxygen, carbon dioxide, water, light and nutrients are the abiotic factors whereas the biotic components are algae, bacteria, protozoa and other organisms are the ecological factors that greatly influence the pond ecosystem. If one of the factor is missing or eliminated from the pond ecosystem the whole ecosystem will disturb and can't work properly. For example, if light is eliminated from the ecosystem, no producers can grow and ultimately death and destruction of the whole ecosystem occurs.
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Ecological factors, such as temperature or trophic relationships between organisms, influences the characteristics of a population in a certain habitat because they make it possible for organisms to have everything they need in the environment to feed, reproduce and survive.
An ecosystem is a system that groups together different populations of animal and plant species which share all the resources available in the same environment. Interactions develop between the elements of an ecosystem, such as energy exchange, food or trophic relationships and all this makes it possible to maintain life in the ecosystem. There are many natural habitats where an ecosystem develops, such as rivers, forests, swamps, deserts, among others. However, there are also artificial habitats created by humans, such as ponds. Ponds have fresh water like lakes, but are smaller (although it is important to consider that ponds can also be formed naturally by water retained or stagnant in a depression in the ground that is usually formed by rain water). Some of the organisms in this ecosystem live in ponds all their lives, while others are transient and visit them only to reproduce and/or feed. Ponds, being habitats where animal and plant species coexist, are susceptible to the influence of environmental factors.
Ecological factors influence the life of any living organism. They can be:
Abiotic: non-living elementsSunlightTemperatureWindHumidityAtmospheric pressurePresence of metals in the soilThe pH of the water2. Biotic: living organisms
Presence of other species that can be preys, competitors, predators or parasites.We have to consider that in a pond we can find microscopic algae that use sunlight and mineral substances in the water, perform photosynthesis and then are eaten by herbivorous animals such as fish, frogs and toads (which can also eat insects as do shrews). These, in turn, are eaten by carnivorous animals, such as herons.
It must be taken into account that for life to take place in a correct and natural way, it is necessary that all the ecological factors are correct. So, the presence and quantity of ecological factors influences how the habitat develops since, for example, with the necessary and sufficient amount of sunlight, plants survive by photosynthesizing and these plants are food for herbivorous animals that in turn will be food for other carnivorous animals. This would then alter the food chain, as the population of the different species would start to decrease because it represents a series of organisms that eat each other in such a way that energy and nutrients flow from one to another.
In addition, the temperature must be adequate for vegetation to grow and for animals to survive. Therefore, it is important that the environmental factors present in the habitat are the right ones and in the right quantity, otherwise the balance of the ecosystem can be lost and thus seriously threaten the survival of the species. In this way, any factor that is altered will affect the ecosystem of the pond.
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Use an examples to distinguish dominant and recessive phenotypes.
I'm a bit stuck and need some help. Much appreciated!
Think recessive phenotypes as paper and dominant phenotypes as teared paper. Once paper is teared, it can't be fixed. Not even tape. It'll just leave that mess exposed. Same with dominant phenotypes. It just takes one dominant trait to change the looks of future offspring.
If you don't tear the paper, everything is fine. Same with recessive phenotypes. As long as there's no contact with any dominant phenotypes, the looks of future offspring will change.
q.no. 5 answer me please please please please please please please please please please please
Answer:
(a)The strength of natural fibers is very less as compared to synthetic fibers. Natural fibers are heavy in weight. Natural fibers can be damaged by moths and other insects. These fibers are not wrinkle-free. These fibers are not long lasting and hence not durable.
(b) Cellulose is termed as polymer because it is made up of many monomer units.
(c) Rayon is first man- made fibre it is known as artificial silk because it have properties that are similar to silk.
(d) Rayon possesses many properties of natural fibers since it is a semi-synthetic fiber. Nylon is a synthetic fiber and has properties that are completely different from natural fibers. The key difference between rayon and nylon is their resistance to wrinkles and tears.
(e) Nylon has since become a popular choice, as it has excellent wind resistance, good elasticity, mildew resistance, and is comparatively cheaper. The material is also lightweight and dries quickly.
(f) When the piece of cotton is burnt then it burns completely and produces no odour or smell. When nylon is burnt, It completely burns and produces burning paper like odour. When nylon is burnt then the nylon is completely shrink and starts to melt first and then produces odour during the time of burning
Genetic diversity is associated with asexual reproduction.
True
False
Answer:
i think its false
Explanation:
Answer:
in asexual reproduction you do not really get genetic diversity, therefore this is false.
How you complete this
Answer:
Hi. Can you type the question, it's a bit confused reading it like this thank you!.
what is photosynthesis???
the process green plant taking food from sun light is called photosynthetis
Answer:
Photosynthesis is a process through which plants and other organisms transform light energy into chemical energy, which is then released to power the organism's metabolic processes through cellular respiration.
~OAmalOHopeO
The liver and pancreas are both human body organs. Which of the following correctly compares the two organs?
The liver produces digestive juices, while the pancreas helps break down fats.
The liver makes insulin, while the pancreas helps digest fats.
The liver produces bile, while the pancreas controls the level of sugar in the blood.
The liver filters and cleans the blood, while the pancreas produces bile.
Answer:
Awnser is a
Explanation:
Im from flvs
Answer:
The liver produces digestive juices, while the pancreas helps break down fats.
Explanation:
If three plants grew to 20 cm, 25 cm and 15 cm, what would be the average height of the plants?
Answer:
20 cm
Explanation:
Mammals who have very short development period Inside their mothers body, followed by a second development period Inside a special pouch of the mother that is made of skin and hair are ____.
•monotremes
•placental
•marsupials
•amphibians
pls help ill give brainlist!!!!!!!!!
Answer:
Explanation:
Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).
A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance
Lysosomes function as the digestive system of the cell, serving both to degrade material taken up from outside the cell and to digest obsolete components of the cell itself
Centrioles play a role in organizing microtubules that serve as the cell's skeletal system. They help determine the locations of the nucleus and other organelles within the cell.
The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.
The cytoplasm is responsible for holding the components of the cell and protects them from damage. It stores the molecules required for cellular processes and is also responsible for giving the cell its shape.
See the image below!
Answer:
it is cytosine part of deoxyribonucleic acid
Identify a global challenge
Answer:
electrical waste management and deforestation
A population of birds can have large, heavy beaks or thin, long beaks.
What can we say based on this data?
Select one:
We cannot conclude anything without having more data.
Having heavier beaks is a survival advantage.
Having longer beaks is a slight survival advantage, but having more data would help to confirm.
undo
There is no survival advantage between having heavier beaks and longer beaks.
Answer:
We cannot conclude anything without having more data.
Explanation:
All the statement says it that the birds have different types of beaks. There is no mention of information that the beak difference brings advantage or not. If the question were to say the heavy beaks survive more, then the answer would be those birds have an advantage- because it does not, the answer is we need more data
Why is the alpine tundra important to protect
Answer: the tundra is important to protect is that it serves as a habitat for migratory populations, like waterfowl, shorebirds, caribou and several bear species. It is home to endangered animals such as the Arctic Fox, Polar Bear, Grizzly Bear, Caribou, and Musk Ox.
Explanation:
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How many amino acids must be obtained in the diet because they cannot be made by the body?
Оооо
10
20
Answer:
10
Explanation:
The body is unable to produce essential amino acids. Because the body is unable to produce 9 amino acids, they must be received through diet. Thus, option A is the best choice.
What are Essential amino acids?An obligatory amino acid, also known as an essential amino acid, is one that the body cannot produce quickly enough to meet need and must thus be obtained from the food.
Humans and other animals cannot generate essential amino acids from metabolic intermediates. The body lacks the metabolic processes necessary to produce these amino acids, thus they must be obtained from an external diet.
The body is unable to produce essential amino acids. They must therefore originate from food. Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are the nine essential amino acids.
Therefore, option A is the best choice.
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Your question is incomplete, most probably the complete question is :
How many amino acids must be obtained in the diet because they cannot be made by the body?
91020Explain the characteristics scientists use when observing organisms and placing them in the six kingdoms .
2. Slime moulds cannot be put neither in kingdom Plantae nor in kingdom Animalia. Give reason.
3. Give the disadvantages of the two kingdom classification.
Answer:
3. In the two-kingdom classification following are drawbacks:-
The plants comprised of photosynthetic and non-photosynthetic species. Fungi, that feed on dead organic matter, were placed under photosynthetic plants. There was another class of classification needed were the organisms with the same characteristics were clubbed into one kingdom. This system did not distinguish between the eukaryotes and prokaryotes, unicellular and multicellular organisms and photosynthetic (green algae) and non-photosynthetic (fungi) organisms. There are some organisms which neither fall into plant nor animal kingdom like Lichens.Explanation:-
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Which of the following environments are low-level areas that can be temporarily or seasonally filled with water?
A. Rainforest
B. Swamp
C. Tundra
D. Wetland
its A, i took the test sorry for not anasewring at the right time of year, pardon me
Both mitochondria and chloroplast have about the same function as…
. animal cells.
. eukaryotic cells.
. prokaryotic cells.
Answer:
Prokaryotic cells.
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The raw material used by plants during photosynthesis N2and O2 O2,H2 and CO2 CO2 and water water and minerals
Answer:
Thus, the correct answer is 'Carbon dioxide, water, and sunlight'.
A sealed Ecosphere is able to perpetually sustain life until what happens?
Answer:Oxygen is DEPLETED
Explanation:
