hope this helps
Answer:
The menstrual cycle is regulated by hormones. Luteinizing hormone and follicle-stimulating hormone, which are produced by the pituitary gland, promote ovulation and stimulate the ovaries to produce estrogen and progesterone.
Explain the structure of the nucleus in a living cell
Answer:
The nucleus contains nearly all of the cell's DNA, surrounded by a network of fibrous intermediate filaments and enveloped in a double membrane called the "nuclear envelope". The nuclear envelope separates the fluid inside the nucleus, called the nucleoplasm, from the rest of the cell.
hope that helps<3
Answer:
Look at the explanation
Explanation:
Nucleus is situated in the cytoplasm of the cell.
Usually, it is round but many different shaped nuclei can be seen in some cells.
It is surrounded by two porous membranes called nuclear membranes which remain continuous with the Endoplasmic Reticulum.
Within the nuclear membrane is present a liquid substance called nucleoplasm.
Nucleoplasm contains two types of chromatin material: Heterochromatin and Euchromatin.
Chromatin fibres are thin thread-like structures composed of DNA and proteins.
These fibres condense to form short thick chromosomes during cell division and become visible.
DNA molecules transfer hereditary information from one generation to the next.
Hope this helps!
How do different species evolve overtime
Answer:
Biologists believe that new species evolve from existing species by a process called natural selection. ... Organisms that inherit that favorable new gene are likely to become more abundant than others of the species. Sometimes the population of a species becomes separated into two areas, by geography or by climate.
Without a cell membrane there could be no _______ and without cells there would be NO ____________________.
Answer:
I think it would be the following: Without a cell membrane there could be no cells and without cells, there would be NO organisms.
Please correct me if I'm wrong, hope I helped :)
What is the term for "anything that takes up space and has mass"?
A. Electron
B. Atom
C. Matter
D. Water
Answer:
Matter
Explanation:
A plant cell has lost too much water due to evaporation by the sun. It needs more water from other cells. What structure would allow the water to be transferred?
A. Proton pump
B. Thylakoid membrane
C. Plasmodesmata
D. Cellulose
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If a damaged cell is found, or produced, during the cell cycle, then that cell will undergo
O A. Division
B. Apoptosis
C. Growth
D. DNA synthesis
Answer:
D
Explanation:
DNA synthesis
If the damage is irreparable, the cell may undergo apoptosis, or programmed cell death 2. This self-destruction mechanism ensures that damaged DNA is not passed on to daughter cells and is important in preventing cancer.
Explain how the body prevents particles in inspired air from reaching the gas
exchange surfaces.
Your respiratory system prevents harmful substances from entering the lungs by using: .Mucus produced in the trachea and bronchial tubes to keep air passages moist and aid in intercepting dust, bacteria and other substances; The sweeping motion of cilia (small hairs in the trachea) to keep air passages clean
Mucus produced in the trachea and bronchial tubes to keep air passages moist and aid in intercepting dust, bacteria and other substances; The sweeping motion of cilia (small hairs in the trachea) to keep air passages clean.
What is inspired air?Due to exchanges that occur in the alveoli, the amount of gases in the air that is breathed in and out varies. We only take in about 4 to 5 percent of the oxygen found in atmospheric air, and we exhale air with about 16% oxygen.
Normal air contains about 0.04% carbon dioxide, and as it diffuses from the blood into the alveoli, we exhale air with about 4% carbon dioxide. Exhaled air is hotter than that which we breathe in and includes more water vapor than that which we breathe in.
In contrast to ordinary smell, which occurs during the inhalation phase, the olfactory contribution to flavor occurs during the exhalation process. As a result, we can conclude that expired air differs from inspired air in terms of oxygen content, bacterial density, and water vapor content.
Therefore, Mucus produced in the trachea and bronchial tubes to keep air passages moist and aid in intercepting dust, bacteria and other substances; The sweeping motion of cilia (small hairs in the trachea) to keep air passages clean.
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DNA sequences in many human genes are very similar to the sequences of corresponding genes in chimpanzees. The most likely explanation for this result is that __________.DNA sequences in many human genes are very similar to the sequences of corresponding genes in chimpanzees. The most likely explanation for this result is that __________.chimpanzees evolved from humanshumans evolved from chimpanzeesconvergent evolution led to the DNA similaritieshumans and chimpanzees share a relatively recent common ancestor
Answer:
humans and chimpanzees share a relatively recent common ancestor
Explanation:
someone else has asked the same question
Haploid gametes produced in females that are used in fertilization are called polar bodies.
True
False
Answer: true
Explanation: hope it helped
what is the function of cell nucleus?
Answer:
The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus. The gel-like matrix in which the nuclear components are suspended is the nucleoplasm.
Explanation:
What are fossil fuels? Why do you think they are used if they cause climate change?
Answer:
fossil fuels are natural fuels like coal.
When fossil fuels are burnt they release large amounts of carbon dioxide ( a greenhouse gas ) that traps heat in our atmosphere causing global warming which is also a factor of climate change
Explanation:
hope i helped dearest
What is sclernechyma??
Answer:
strengthening tissue in a plant
Explanation:
Answer:
It is strengthening tissue in a plant, formed from cells with thickened, typically lignified, walls.
Explanation:
discribe 2 different types of bird nests and list their forms and functions
Answer:
there r not only 2 types of nests
Cup nest.
Adherent nests.
Platform nests.
Earth-hole nests.
Ground and mound nests.
Scrape nests.
Explanation:
where does reabsorbtion of glucose take place?
glomerulus
bowman's capsule
2nd coiled tubule
1st coiled tubule
Answer:
proximal tubule
Explanation:
Glucose reabsorption takes place in the proximal tubule of the nephron, a tube leading out of Bowman's capsule. The cells that line the proximal tubule recapture valuable molecules, including glucose.Under normal circumstances, up to 180 g/day of glucose is filtered by the renal glomerulus and virtually all of it is subsequently reabsorbed in the proximal convoluted tubule.
Maintaining a rich variety of genetic material that may lead to discoveries useful to juman can be ensured by?
Answer:
Maintaining a rich variety of genetic material that can lead to discoveries useful for humans can be ensured by preserving biodiversity. Explanation: Options for this question are: Preserving biodiversity .Hope this is fine for youThis fossil turtle and this living hawk both have a structure in their neck called the atlas bone. What best explains why both species have an atlas bone?
a) The turtle and hawk are different species, so they must not share an ancestor population. They inherited their atlas bone structure from separate ancestor populations.
b) The turtle and hawk both share the same ancestor population that had an atlas bone. They inherited this structure from the ancestor population.
c) It is impossible to say. Fossils are very old; therefore, we cannot make observations of the turtle’s ancestors, and we cannot explain its body structures.
d) All species have their own specific body structures, so it is a coincidence that this turtle and hawk each happen to have the atlas bone structure.
Answer:
the answer its c
Explanation:
I hope this helps
It is impossible to say. Fossils are very old; therefore, we cannot make observations of the turtle’s ancestors, and we cannot explain its body structures. Thus, option C is correct.
What is the source of inheritence of turtle and hawk?
The turtle and hawk are different species, so they must not share an ancestor population. They inherited their atlas bone structure from separate ancestor populations. All species have their own specific body structures, so it is a coincidence that this turtle and hawk each happen to have the atlas bone structure.
The turtle and hawk both share the same ancestor population that had an atlas bone. They inherited this structure from the ancestor population. It is impossible to say. Fossils are very old; therefore, we cannot make observations of the turtle’s ancestors, and we cannot explain its body structures.
Therefore, It is impossible to say. Fossils are very old; therefore, we cannot make observations of the turtle’s ancestors, and we cannot explain its body structures. Thus, option C is correct.
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Molecule 1 on the diagram has the nitrogenous base sequence TCAAGT.
Which set of bases in Molecule 2 can bond to this sequence in a
complementary way?
1.)AGTACA
2.)AGUUCA
3.)UCAAGU
4.)UCAATA
Answer:
3
Explanation:
because because you need the same explanation as you take in picture
Cuales son algunas de las propiedades que comparten las ondas electromagnéticas infrarrojas y la luz visible? En que son diferentes? Ayuda porfavor :(
Answer:
ver explicacion
Explanation:
Las ondas electromagnéticas a menudo se denominan colectivamente luz. Se sabe que todos viajan a través del espacio y poseen una velocidad de 3 × 10 ^ 8 m / s.
Como ondas, tanto la luz visible como la radiación infrarroja comparten propiedades comunes como refracción, difracción, interferencia, etc.
Sin embargo, la principal diferencia entre los rayos infrarrojos y la luz visible es que la luz visible se puede ver a simple vista, mientras que los rayos infrarrojos no se pueden ver a simple vista.
Please help with this!!!!
Answer:
Florida would be more susceptible to flooding from nearby hurricanes
The rocky material left behind by a retreating glacier forms what is called a moraine. When primary succession occurs on a moraine, which life-forms will help create the soil by breaking down bare rock?
A Insects
B Lichens
C Grasses
D Deciduous trees
Answer:
The correct answer is - B. Lichens.
Explanation:
Lichens are one of the pioneer species that can grow on bare rock such as moraine and help make soil for further ecological succession and making ground for other species.
Breaking the bare rocks to convert into the soil is part of the primary succession. Lichens are colonized over these rocks and they contain acid which leads to the breakdown of the moraine and other rocks.
100 points!!!!!!
According to the National
Institute of Health, ventricular tachycardia is a fast, regular beating of the ventricles that may last for only a few seconds or for much longer. A few beats of ventricular tachycardia often doesn't cause
problems. However, episodes that last for more than a few seconds can be dangerous. Ventricular tachycardia can turn into other, more serious arrhythmias, such as ventricular fibrillation.
Based on the passage above, how will prolonged ventricular tachycardia affect blood pressure?
O It will increase blood pressure because the ventricles are contracting with more force.
O It will increase blood pressure because the ventricles are filling with more blood between beats.
O It will decrease blood pressure because there is a longer rest period beats of the ventricles.
O It will decrease blood pressure because the ventricles are filling with less blood between beats.
Answer:
It will decrease blood pressure because the ventricles are filling with less blood between beats.
Explanation:
In ventricular tachycardia, the heart beats faster than normal, usually 100 or ... The chaotic heartbeats prevent the heart chambers from properly filling with blood. As a result, your heart may not be able to pump enough blood to your body
Answer:
It will decrease blood pressure because there is a longer rest period beats of the ventricles.
Explanation:
You can read more about Ventricular Tachycardia here: https://www.pennmedicine.org/for-patients-and-visitors/patient-information/conditions-treated-a-to-z/ventricular-tachycardia
Why do some ecosystems remain stable for centuries while others undergo succession
As long as the ecosystem inputs remain the same, the ecosystem will remain stable. Only when there is a fire, drought, or other disturbance in the ecosystem, will the ecosystem change. A new set of plants will arise to most efficiently use the resources that are available under the new conditions. However, over time, if the disturbance is temporary, the ecosystem will eventually revert to the stable ecosystem that was there before the disturbance.
What is a stable ecosystem?Stability (of an ecosystem) refers to the capability of a natural system to apply self—regulating mechanisms so as to return to a steady state after an outside disturbance.
What is succession?Ecological succession is the process of change in the species structure of an ecological community over time.
Causes of succession:Topographical: Extreme conditions cause abiotic topographical factors, which are mainly involved with secondary succession. Landslides and mudslides are examples of this type of factor.Soil: The soil, an abiotic factor, of an environment affects ecological primary succession greatly. Different species of plants require different soil conditions.Climate: Climate, an abiotic factor highly involved in both primary and secondary succession, plays a significant role in determining the direction of succession in an environment. Ecosystem remains stable: It’s all about balance, left to its own devises nature constantly rebalances.populations increase and decrease all the time, usually due to food sources either being plentiful or scarce, when plentiful the animals that feed on them thrive and breed.when scarce they starve and decline in number, this decline in numbers allows time for the food source to regrow or reproduce (if the food source is another animal species), The ecosystem is unaffected in the long run and remains in balance.Thus, it can be concluded that As long as the ecosystem inputs remain the same, the ecosystem will remain stable.
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What is phytotomy?Explain
Answer:
ANATOMY OF PLANT IS CALLED PHYTOTOMY
Explanation:
Plant anatomy or phytotomy is the general term for the study of the internal structure of plants. ... Plant anatomy is now frequently investigated at the cellular level, and often involves the sectioning of tissues and microscopy.
Answer:
the anatomy of plants.
Explanation:
phytology - the branch of biology that studies plants. botany.
If a molecule is large and mainly
contains carbon and hydrogen
atoms, then which of the
following is true?
A. The molecules are soluble in water.
B. The molecule is a steroid.
C. The molecule is insoluble in water.
D. The molecule has less energy available.
A
Explanation:
It is A
digestive system label part A and C
Explanation:
can u attach the label parts??
A colorblind woman (it is the recessive trait) marries a man with normal
vision. What are the odds that their children are color-blind? The gene is
located on the x chromosome.
A) 0%
B) 25%
C) 50%
D) 100%
What are water and carbon dioxide in the cellular respiration reaction?
CU
They are reactants because they are present before the reaction.
They are reactants because they are present after the reaction.
They are products because they are present before the reaction
They are products because they are present after the reaction
Save and Exit
Answer:
They are products because they are present after the reaction.
hope it helps
have a nice day
Define the word ⇒ matter
Answer:
matter is what makes up everything, every type of organism, every object, etc.
Explanation:
Answer: 1.
physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
"the structure and properties of matter"
2.
an affair or situation under consideration; a topic.
Explanation:
Hope it helps
Where does the exchange of oxygen (from the air) with carbon dioxide (from the cells) take place?
A. Where are the bronchi meet the bronchioles
B. Where the blood meets the cells
C. Where the nasal passages meet the air
D. Where are the alveoli meet capillaries
Answer:
The Answer is Option D.
Exchange of respiratory gases, oxygen and carbon dioxide take place in the alveoli of the lungs. Oxygen which is inhaled from the atmosphere diffuses through the walls of the alveoli and reaches to the adjacent capillaries into the red blood cells.
Answer:
D. Where are the alveoli meet capillaries
Which is not the correct statement from the following
calcitonin prevents the process of mixing of calcium from bones to blood
parathormone reabsorbs calcium from kidneys to blood
parathormone stores the excess calcium from blood to bones.
parathormone prevents the storage of calcium in bones.
Answer:
hello po momodule pako haha