it's a pump that sends blood throughout the body
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.
why a genetic bottleneck can be an important evolutionary factor for a species
Answer:
Genetic drift decreases genetic diversity within a population.
Explanation:
Genetic drift decreases genetic diversity within a population. It is a change in allele frequencies due entirely to random chance and is more likely to affect smaller populations than large ones. Population bottlenecks can lead to genetic drift.
how are ethanol and glucose similar in structure and function choose all correct answers
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.
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 are three characteristics of alveolus? <3
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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what are the different variations of genes called?
Answer: Different versions of a gene are called alleles.
Check which type(s) of stem cells the characteristics apply to.
Answer:
no clue
Explanation:
who is credited with developing the theory on systems?
Answer:
Ludwig von Bertalanffy
Explanation:
which fitness test measures your cardiovascular system?
Answer:
The Astrand Treadmill Test. The 2.4 km Run Test. The Multistage Bleep Test.
Explanation:
what is the single greatest threat to biodiversity?
Answer:
Habitat loss
Explanation:
in fact it is the second largest threat to our existence on this planet next to Climate Change.
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
What is an angiosperm? Provide 2 examples. PLEASEE
Answer: Angiosperms represent approximately 80 percent of all known living green plants. Examples range from the common dandelion to ancient flowers such as magnolias. Angiosperms also make up the vast majority of all plant foods we eat. (Ex. grains, vegetables, and fruits.) The angiosperms are vascular seed plants in which the ovule (egg) is fertilized and develops into a seed in an enclosed hollow ovary The ovary itself is usually enclosed in a flower, that part of the angiospermous plant that contains the male or female reproductive organs or both. fruits are derived from the maturing floral organs of the angiospermous plant and are therefore characteristic of angiosperms.
Explanation: ^
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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what is a probable reason that a trait skips a generation?
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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What percentage of red cross donations go to charity?
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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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 :)
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.
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 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
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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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:
Which process does the grass used to make the food this horse needs?
A.) Photosynthesis
B.) Respiration
C.) Eating
D.) Digestion
Answer:
Photosynthesis
Explanation:
Just like trees and other plants, grass converts energy from sunlight into sugar through the process of photosynthesis. This energy is used to convert water and carbon dioxide into glucose. Carbon dioxide is absorbed through the stomata in the leaf and water is mainly derived from uptake in the roots. Photosynthesis makes the grass green and healthy.
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.
describe 2 ways that mitosis is important for your body.
Answer: your cells are extremely hard
Explanation:
Describe what is happening in figures 1-3
Answer:
There are less white mice in the third box because the bird has already been there. But it is harder for it to see the dark mouse so they are safer and more of them are left. In the second box the bird is holding a white mouse. But the first and second boxes have about the same numbers of mice because the bird already has one
Explanation:
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: