1. Which equation best represents the dissociation of water molecules into hydrogen ions and hydroxide ions?
How do species evolve?
Answer:
Natural selection.
Explanation:
Animals mate with different animals creating a species with different genes that helps their kin live longer or stronger.
(No links)
Which is NOT a characteristic of unsaturated fats?
A. liquid at room temperature
B. animal fats
C. kinks in the carbon chain
D. not fully saturated with hydrogens
Answer:
C
Explanation:
Beneficial bacteria are found in our digestive tract
A. true
B. False
please help
I will give brainliest and 5 * and 10 points for the best answer
I don't want to see an link if I do you will be reported
Answer:
A
Explanation:
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What do you think of when you hear the word "energy?"
I
(Pls somebody answer)
Select the correct statement about the three-chambered hearts of amphibians and nonbird reptiles. A scheme of blood circulation of reptiles except for birds. The reptiles have a three-chambered heart that consists of two atria and one ventricle with an incomplete septum. There are two circuits: pulmonary and systemic. In the pulmonary circuit, the blood from the right ventricle is pumped in to lung capillaries and returned to the left atria. In the systemic circuit, the blood is pumped from the left ventricle to the systemic capillaries via the left systemic aorta and is then returned to the right atria. There is also one vessel going from the right ventricle to the aorta right before it branches to smaller arteries. This vessel carries mixed blood. All blood on the right side of the circuits is venous and all blood on the left side is arterial. Select the correct statement about the three-chambered hearts of amphibians and nonbird reptiles. The three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart. The three-chambered heart is inferior to the four-chambered hearts of birds and mammals, limiting the evolutionary success of amphibians and nonbird reptiles. Pulmonary and systemic blood fully mixes in the ventricle of a three-chambered heart.
Answer:
The three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart.
Explanation:
In Anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
I. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
II. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
All amphibians and reptiles except for crocodiles (having four-chambered heart) have three-chambered hearts, which typically comprises of a partially divided ventricle and two atria.
Hence, the correct statement about the three-chambered hearts of amphibians and nonbird reptiles is that, the three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart due to the partially divided ventricle.
Describe reasons for the fluctuation of the population.
The real length of one villus is 0.8 mm
Calculate the image length if the villus is viewed at a magnification of x20
magnification = size of image / size of real object
Answer:
Explanation:
Re arrange formula=Size of image=Magnification*size of real image
0.8mm*20=16mm
The image length will be "16 mm". A further explanation is below.
Given:
Magnification,
20Size of real image,
0.8 mmAs we know the formula,
→ [tex]Magnification = \frac{Size \ of \ image}{Size \ of \ real \ image}[/tex]
or,
→ [tex]Size \ of \ image=Magnification\times Size \ of \ real\ image[/tex]
By substituting the values, we get
→ [tex]=20\times 0.88[/tex]
→ [tex]= 16 \ mm[/tex]
Thus the response above is correct.
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ever since i learned that your brain can see your nose but ignores it i cant stop seeing my nose and its getting annoying pls help
Linnaeus used the _____ language in his two-word naming system.
Neuromodulation is the release of chemicals (other than ____________ ) from cells that locally regulate or alter the response of neurons to neurotransmitters. The substances released are called ____________ . Neuromodulation generally results in either facilitation or inhibition. When there is greater response from a postsynaptic neuron because of the release of neuromodulators it is ____________ . This may result from either ____________ amount of neurotransmitter in the synaptic cleft or ____________ number of receptors on postsynaptic neurons. When there is less response from a postsynaptic neuron because of the release of neuromodulators, it is called ____________ . This results from either ____________ amount of neurotransmitter in the synaptic cleft or ____________ number of receptors on postsynaptic neurons.
Answer:
Neurotransmitters; neuromodulators; facilitation; an increased; an increased; inhibition; a decreased; a decreased.
Explanation:
In Biology, stimulus can be defined as an obvious change in either the chemical or physical structure of an organism' environment (either external or internal). Thus, all living organisms (both animals and plants) respond to changes in their environment and consequently, an appropriate response or reaction is made. Also, stimulus arising from within the organism is known as internal stimulus while those from its environment are known as the external stimulus.
In organisms, the specialized cells that detect stimulus are generally known as sensory receptors while a group of these receptors is referred to as sense organ.
Neuromodulation is the release of chemicals (other than neurotransmitters ) from cells that locally regulate or alter the response of neurons to neurotransmitters. The substances released are called neuromodulators. Neuromodulation generally results in either facilitation or inhibition. When there is greater response from a postsynaptic neuron because of the release of neuromodulators it is facilitation. This may result from either an increased amount of neurotransmitter in the synaptic cleft or an increased number of receptors on postsynaptic neurons. When there is less response from a postsynaptic neuron because of the release of neuromodulators, it is called inhibition. This results from either a decreased amount of neurotransmitter in the synaptic cleft or a decreased number of receptors on postsynaptic neurons.
Question 4
2 pts
The number of chemical industries along Florida's rivers is increasing. What is the most
likely consequence of this increased industrialization?
O a decrease in the amount of water pollution
O an increase in the amount of water available for recreational use
an increase in the destruction of natural food webs
O a decrease int he amount of water needed by industry
Answer:
The correct answer would be - an increase in the destruction of natural food webs.
Explanation:
Increasing chemical industries near the river cause harmful effects to the environment by various means, including air pollution, dumping untreated chemical or industrial waste, and wastewater in the river. This will lead to a lack of potable water, contamination of the food chain, destruction of biodiversity, and many more.
The destruction of biodiversity can be caused by the increasing the unbridled growth of phytoplankton, eutrophication process that will consume more oxygen and cause algal bloom and decrease the oxygen in the water and destroys the organism and natural food web.
You find a fossil in your backyard. 12% of the Carbon 14 isotope is remaining. How old is the fossil?
Answer:
16,250 years (plus or minus (±) 10 years)
I need help please :(
Answer:
D. Cellular respiration is a process that producess glucose
Explanation:
Glucose is a reactant used in cellular respiration and NOT a product of it. Cellular respiration burns glucose and turns into ATP (energy)
people who take antibiotics are always told to complete the treatment rather than stop taking the medication when they feel better suggest two reasons why people are given this advice
Answer:
- Helps ensure that all of the illness-causing bacteria are killed or prevented from multiplying
- Helps prevent superbugs (bacteria that are immune to the antibiotic)
Answer:
it is to kill all the bacteria completely
and
to make sure that the person is completely healed because if the stop the treatment after a while the illness may come back with full force and this time to kill
ANSWER QUICK PLZ
The photo shows several Volvox, one of the simplest multicellular living things. Volvox have no tissues.
What other three things do Volvox also likely lack?
Answer:
A, B, D.
Explanation:
Experiments have shown that adult human hearing is most sensitive in the frequency range of the sound of a human baby crying. Based on the threshold of audibility curve shown for an adult male shown below, into which frequency range does most babies' crying fall? Threshold of audibility equal-loudness curve A. 25 – 50 Hz B. 250 – 500 Hz C. 2500 – 5000 Hz D. 10,000 – 20,000 Hz
Answer:
The correct answer is - C. 2500 - 5000 Hz
Explanation:
According to the graph, there is the threshold of audibility curve that exhibits that at 2500 Hz and 5000 Hz, the lowest thresholds of audibility are present. So the sound that is faintest can be heard at 2500 Hz and 5000 Hz.
This is the reason that te humans are sensitive to the crying of the babies as they must cry at 2500 Hz and 5000 Hz frequency and we get their attention easily.
what gas will make a flame bigger?
Organelles are found in...
A. the blood stream of complex organisms.
B. inside most cells.
C. constantly moving between cells.
Answer:it’s C
Explanation:
both plant and animal cells:
A) produce proteins
B) contain a large vacuole
C) photosynthesize
D) contain green pigments
Of the three major types of handwriting characteristics line form includes, smoothness of the lines,
pen pressure, and slant
True or False?
name two tissues which are thickened with lignin
Answer: parenchyma (living thin-walled tissue) and collenchyma
Explanation:
A garden contains 40 flowers, 30 of which are red. What is the frequency of red flowers?
Answer:
0.75
Explanation:
a frequency of 1.0 occurs when all the flowers are red
A garden that contains 40 flowers, 30 of which are red. Then, the frequency of red flowers is 75% of 1:3.
What is Frequency?Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as the temporal frequency for clarity, and is distinct from angular frequency. Frequency is usually measured in hertz (Hz) which is equal to one event per second.
Gene frequency is the fraction or percentage of a population which carries a particular allele at a particular gene locus. In this case, a garden has 40 flowers, in which 30 are red.
Therefore, the frequency of red flowers = Number of red flowers/ Total number of flowers
The frequency of red flowers = 30/ 40 = 75% or 1/3
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True or false--
All the modern species of bison have evolved overtime just as all living organisms evolve over time.
Answer:
The working assumption for many years was that, like North American bison, European bison evolved from steppe bison. ... Their results suggest that the European bison is the result of inter-breeding, over 120,000 years ago, between steppe bison and aurochs; the wild ancestors of modern domestic cattle.
Our study suggests that the first bison arrived in North America 195 - 135 thousand years ago over a land bridge between Asia and Alaska. They quickly spread and evolved (changed) into different forms to adapt to their new environments.
*insert JIMIN'S ROCK BISON pic here*
Explanation:
I.d.k what answer ur expecting from this sentence army.
so I just gave more info regarding this..lol.
4.
What is the salinity of seawater?
1.5 percent
3.5 percent
10 percent
5.5 percent
Answer:
I think the answer is 3.5%
Explanation:
35 parts per thousand of seawater contains salt therefore your answer is 3.5
A wave has a frequency of 64 Hz and a wavelength of 17 meters. The speed of the wave is
Answer:
1088 ms-¹
Explanation:
Speed of a wave=Frequency of the wave*Wavelength of that wave
V=64*17=1088ms-¹
Describe why food needs to be digested from large to small molecules.
Answer:
Food must be broken down into nutrients for the body to use for energy, development, and cell repair. Before the blood absorbs and transports nutrients to cells in the body, food and drink must be broken down into smaller nutrient molecules.
Whoever gets it right i will mark brainest
Answer:
For Desssert: C
For Taiga: A
For Tropical Rainforest: B
Explanation: Because desserts are very hot, we know that there aren't much plants due to the lack of rain/water, they're dry. Rainforests have lots of plants, so it's not B, and since the dessert is high temperature, A is obviously off the list.
Taiga is cold so it won't be good for soil and the plants won't grow as good as the wet rainforest so we can pick A. Then B for #2
What elements makes up a glucose molecule?
Answer:
Carbon, Hydrogen, Oxygen
Explanation:
Regulation of heart rate is most closely associated
with the
A) cerebrum
B) cerebellum
C) somatic nervous system
D) autonomic nervous system
Answer:
D.autonomic nervous system
