Ovulation starts when the secretion of Luteinizing hormone (LH) peaks in females.
Ovulation is simply the release of eggs from the ovaries of females. It happens as a part of the menstrual cycles of the female gender.
The release of eggs from the ovary is triggered by an acute rise in the level of LH in females. LH in males stimulates the production of testosterone.
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Scientists are examining different sea floor structures like those in the model of the Earth's crust below.
The distance between X and Y represents thousands of kilometers of distance on Earth. The scientists notice that the rocks located at point X are older than the rocks located at point Y. What does this information about the age of the rocks indicate to the scientists?
A.
There is an underwater volcano producing new rock at point X.
B.
The sea floor is moving from Y to X over the course of millions of years.
C.
New rock is constantly covering old rock on the ocean floor.
D.
The sea floor is moving from X to Y over the course of millions of years.
Answer:
C.) The sea floor is moving from Y to X over the course of millions of years.
Explanation:
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What is secondary endosymbiosis?
A. a eukaryote envelops another eukaryote
B. a prokaryote preys upon a prokaryote
C. a prokaryote engulfs a eukaryote
D. a eukaryote overtakes a prokaryote
Answer:
Secondary endosymbiosis is when a living cell engulfs another eukaryote cell that has already undergone primary endosymbiosis. It has happened often enough that it has led to genetic diversity among the organisms on Earth.
Explanation:
hope this helps I don't know Its correct answer
Standard SB3
1. Using Mendel's Law of Segregation and Law of
Independent Assortment, explain how meiosis leads to genetic variation.
Answer:
Homologous chromosomes can independently assort along the metaphase plate during metaphase 1, meaning it doesn't not matter the order in which they line up, making it have more diverse possibilities. The law of segregation says that one allele from a gene can go to either gamete randomly, therefore there are 4 genetically different gametes from each parent that can be formed and come together to form a genetically diverse person.
Explanation:
Briefly summarize the structure of a fern
Answer:
The structure of a fern. Ferns have 3 major parts – the rhizome, the fronds and the reproductive structures called sporangia. ... An erect rhizome, which is a solid mass that gives rise to a tuft of fronds. You can see this type of rhizome on a king fern or a crown fern.
Explanation:
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What are three characteristics of alveolus? <3
Describe Hydrogen Bonding.
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Hydrogen bonding is a interaction between two hydrogen atoms that is very essential for life on Earth. It is notoriously seen between water molecules, and it occurs when there is a slight disbalance in electrical charge between two Hydrogen atoms, and Oxygen atom that comprise water. This slight imbalance makes the Oxygen slightly more electronegative, and the two hydrogen atoms slightly more electropostive. The reason why water when spilled forms globules for this exact reasoning. The slightly positive charged hydrogen feels an electrostatic attraction to the Oxygen atom thus forming a strong bond. An interesting fact that comes from this electrical disbalance is that when salt is added to water, water is able to conduct electricity because of this disbalance in charge it can seperate the sodium chloride lattices into ions.
Which of the following is the correct pairing of
a protist and its parasitic relationship?
A. termites and the protist that digests cellulose in its gut
B. plasmodium protists that carry malaria and mosquitoes they live
on
C. Trypanosoma and the beetles that carry it to the host
The correct pairing of a protist in a parasitic relationship is Trypanosoma and the beetles that carry it to the host.
What is a parasite?
A parasite is an organism that lives on another organism while harming its host. The parasite contributes nothing but harm in its relationship with the host.
An example of a parasitic relationship between a protist and another organism is Trypanosoma and the beetles that carry it to the host.
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in phantom limb syndrome, which sensory pathway is responsible for conveying the sensory neuron activities?
The experience of the phantom limb syndrome involves the subjective sensation of the patient, the processes involved in this sensation are: both sensitive activity and the motor pathway.
The somatic nervous system is made up of mixed nerves (mixtures of sensory and motor axons) that emerge from the central nervous system, innervate the somatic effectors (skeletal muscles).Somatic motor pathways begin in the motor areas of the cerebral cortex, the projection neurons in that cortex emit axons that descend through the brain stem until they reach the spinal cord.Patients with this syndrome experience the sensation that the amputated limb is still attached to their body, since the brain continues to receive messages from the nerves that originally carried the impulses from the lost limb.Therefore, we can conclude that Phantom Limb Syndrome is the perception of sensations, which include pain of an amputated limb, where both sensory activity and the motor pathway have an action on said sensations.
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What is common between these two pictures? Describe it in short.
Answer:
Eustachian Tube
Explanation:
Eustachian tube is the structure that connects the throat to middle ear. It performs an important role in the balancing of air pressure across the both sides and prevent from fluids building up in the ear.
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Hope this helped!
~AH1807The thing which is common between these two pictures is:
The Eustachian Tube
From the given image, we can see that there is image of ear and mouth and we can see that the outer ear is visible, while the mouth is wide open and we can see the interiors.
With this in mind, we can see that the Eustachian Tube is the structure which links the throat and ear and this performs the important function of regulating the air pressure that gets into the organs.
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Scientists put a sample of water into a sealed tank. Water can be a solid, liquid, or gas. At first, the water was a liquid. Then, the scientists transferred energy out of the substance, and the water changed phase. What happened to the movement of the water molecules?
After the phase change, the water molecules moved . . .
Answer:
slower and started moving in place
Explanation:
Are you for or against dna fingerprinting? Explain why
Answer:
For fingerprinting
Explanation:
In my opinion, I am for fingerprinting for DNA. Because if someone did a crime and left their fingerprint using DNA fingerprinting you will be able to figure out who did the crime. Which is very helpful in finding the criminal.
Again this is just my opinion. Note opinions may vary :)
4. Jasmyne has not eaten in eight hours. She is very tired and does not have enough energy to play soccer. Which of the following may explain why she does not have enough energy?
A Her cells do not release enough energy because they do not have enough amino acids.
B Her cells do not release enough energy because they do not have enough glucose.
с Her cells do not release enough energy because they do not have enough water.
D Her cells do not release enough energy because they do not have enough carbon dioxide.
Answer:
I would say that A is the correct answer. Foods release amino acids. Hope this helps. :D
if retinal detachment occurs in the macula or fovea, one can predict that there would be a significant loss of ______.
Answer:
color vision
Explanation:
The graph below shows the change in the frequency of one allele over 500
generations in a large population. Which of the following statements
describes the change depicted in the graph?
An allele simply refers to a variant form of a gene. Alleles are vital to the phenotype of an organism.
Your information is incomplete. Therefore, an overview of alleles will be given. An allele simply means the forms of a given gene variant. Alleles are genetic sequences. They code for the transmission of traits.
Alleles are the variant forms of genes which are located in the same position. The changes in allele frequencies can show that genetic drift is taking place or the introduction of new mutations.
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What percentage of red cross donations go to charity?
(SCIENCE) which of these statements about heating up water on earths surface is true? water heats up faster than land water heats up by conduction from Earth
PLEASE HELP!!!!
Answer:
Water heats up to a lower temperature than land.
Explanation:
Because water has a much higher heat capacity, or specific heat, than do sands, soils or other materials, for a given amount of solar irradiation , water temperature will increase less than land temperature.
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What is the metabolic process that breaks down organic molecules to release energy to be used by cells?
A. cellular respiration
B. light dependent cycle
C. light independent cycle
D. photosynthesis
Cellular respiration in living tissues is reduced at low temperatures. The amount of kinetic energy needed for chemical reactions like cellular respiration to occur decreases as temperature rises. Thus, option A is correct.
What importance of cellular respiration in an organism?As oxygen tension dropped, so did breathing rate, which eventually reached nil at low oxygen tensions.
Cell density had no bearing on this outcome. We provide a model to explain the observed impact of oxygen tension on cellular oxygen uptake.
As a result, increased cellular respiration is often associated with warmer temperatures.
Carbon dioxide concentration: The rate of respiration is inversely correlated with carbon dioxide concentration.
Increased carbon dioxide levels and a lack of oxygen have a negative impact on aerobic respiration rate.
Therefore, cellular respiration is the metabolic process that breaks down organic molecules to release energy to be used by cells.
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help taking final will give the breian thing
what is your question? i cant download it
this is about environmental systems
Answer:
A. A weak or strong current
Explanation:
D. is inccorect because rivers are always freshwater
C. is incorrect because seawater is salt water
B. is incorrect because rivers have waterflow.
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Which feature is characteristic of rivers?
Answer:
A. a weak or strong current
Explanation:
hope this helps
Answer:a weak or a strong current
Explanation:
Suppose two leaf-eating species of animals live in a habitat where there is a severe drought and many plants die as a result. Which term describes the kind of relationship the two species probably will have?.
Competition is the kind of relationship these two leaf eating species of
animals will have.
Competition involves organisms vying for resources such as food, sunlight,
space etc in the ecosystem. The two leaf eating animal species are in
competition with each other for plant leaves.
When drought occurs and the leaves reduces, competition for food
increases in which the fittest survive and the less fit ones die from starvation.
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6. Blood type is determined by three alleles, A, B, and O. Use the
punnett square below to answer questions a through c.
a. What is the probability of an offspring with type A blood?
b. What is the probability of an offspring with type O blood?
c. What are the genotypes and phenotypes of the parents?
Pls help I need to turn this in 30 mins and have more work to do
Answer:
a. AO
b. OO
c. AO and BO
Explanation:
It is easier than solving solving matrices problems.
Identify two specific populations that most likely increased in number after the mountain lion population decreased. Explain why.
Any change that occurs at any link of a trophic web will affect the other links. The two specific populations that most likely increased in number after the mountain lion population decreased are rabbits and deers.
----------------------------
The trophic web is a relationship process between different organisms, through which occurs transference of energy. The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
The first link corresponds to a producer organism -autotroph-.The following links are the consumers -heterotrophs-: herbivores and carnivores. The last links are the decomposers that degrade organic matter from dead organisms.
As it is a web, all organisms are equilibrated until a change occurs.
When the change affects any of the involved links, there can be a cascade effect on the web.
A change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
Also, when two or more species are competing for the same source of food, a change in any of the population sizes will affect the other ones.
According to the provided trophic web, puma feeds on deer and rabbit.
Since puma was killed, their population size sharply decreased.
This fact followed the predator-prey cycle, in which the predator regulates the prey population size and vice-versa. When there is a decrease in the predator population size, the prey population increases in size because of the absence of their natural predators.
In the absence of puma, deer and rabbits increase their population size. They live in an environment with no predators and enough resources.
The number of individuals of each species increased, and the amount of food consumed increased too.
This change negatively affected grasses and grains, which were over-consumed. Also, crickets and mice were affected too because they compete for the same food source.
So, cascade effects would be as follows,
1) The decreased in the puma population size caused an increase in the deer and rabbit population size.
2) The increase in the deer and rabbit population size caused a decrease in the grains and grasses species population, because they were over consumed.
3) The decrease in grains and grasses caused a decrease in the cricket and mouse population, because they feed on the first ones, competing with deer and rabbits for food.
The two specific populations that most likely increased in number after the mountain lion population decreased are rabbits and deers.
------------------------
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what are the different variations of genes called?
Answer: Different versions of a gene are called alleles.
if one cell undergoes mitotic division every 3 minutes and 18 minutes pass, how many cells will have been created?
Answer:
6
Explanation:
if there is one cell that is being created every 3 mins, then you would divide 18 by 3 and get 6.
Answer:
here look at this it might help you
Explanation:
What distinguishes an acute disease from a chronic disease?
What is the difference between them
Answer:
Acute illnesses generally develop suddenly and last a short time, often only a few days or weeks. Chronic conditions develop slowly and may worsen over an extended period of time—months to years.
Acute diseases refer to the medical condition that occurs suddenly and lasts for a shorter period of time. Chronic diseases develop slowly in our body and may last for a lifetime. Chronic diseases are sometimes fatal.
Explanation:
Hope you could understand.
If you have any doubt, feel free to ask.
what is a probable reason that a trait skips a generation?
differences between treatment outcomes for different populations are known as:
Answer:
Differences between treatment outcomes for different populations are known as health care disparities.
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1) compare all three states of matter to the
right. Which square has the greatest density
and why? And why is it correct?
Answer:
A
Explanation:
it has more matter in given area, so it is denser.