Answer:
The chemical signal is called a neurotransmitter. Neurotransmitters allow the billions of neurons in the nervous system to communicate with one another.
Explanation:
The graph below shows the breakdown of radon-222.
What is the half-life of Rn-222?
What fraction of the original sample will be left after 3 half-lives?
Answer:
Answer: 7.949\ \text{days}7.949 days
Step-by-step explanation:
Given
The half-life of a sample is T_{\frac{1}{2}}=3.823\ \text{days}T
2
1 =3.823 days
Decay is given by
A=A_o2^{\dfrac{-t}{T_{\frac{1}{2}}}}A=A
o
2
T
2
1
−t
After 3 half-lives, one-eight of the sample is left
Insert the values
\begin{gathered}\Rightarrow \dfrac{A_o}{8}=A_oe^{\dfrac{-t}{T_{\frac{1}{2}}}}\\\\\Rightarrow e^{\dfrac{t}{T_{\frac{1}{2}}}}=8\\\\\text{Taking log both sides}\\\Rightarrow \dfrac{t}{T_{\frac{1}{2}}}=\ln 8\\\\\Rightarrow t=3.823\times \ln 8\\\\\Rightarrow t=7.944\ \text{days}\end{gathered}
⇒
8
A
o
=A
o
e
T
2
1
−t
⇒e
T
2
1
t
=8
Taking log both sides
⇒
T
2
1
t
=ln8
⇒t=3.823×ln8
⇒t=7.944 days
Which best describes the role of sunlight in the process of photosynthesis
a Light provides the energy to make sugars from smaller carbon compounds.
b Light provides the energy to break down sugars into smaller molecules.
C Light provides the energy to break down sugars into smaller molecules.
D Light provides the energy to build large carbohydrates from simple sugars.
Answer:
c
Explanation:
The answer is c because photocythacis makes it so that plants can make their self food and make oxygen
What is the meaning of life
The allele for freckles is dominant. A person who is hybrid for freckles must 1 point
have inherited the freckles allele from
a. Both parents
b. One parent
c. The father
3. The mother
Answer:
one parent
Explanation:
the one dominant trait will make the ratio 2:4 hope this helps
Pick a plant and an animal FROM MIAMI that have been particularly affected by climate change in your area and explain how they each have changed
all my points along with brainliest
Answer:
Vanilla orchid
crocodiles
Explanation:
The plant doesnt have enough water due to scarcity of rain.
The water is evaporated and the crocs live in the water
Empties bile into the duodenum from the gallbladder.
Bile empties from the gallbladder into the bile duct. The bile duct merge with the pancreatic duct to form the ampulla of Vater, which empties into the duodenum.
What releases bile into the duodenum?The gallbladder
The bile made by the liver is kept in the gallbladder. This is a pear-shaped organ found below the liver. Then, when food is eaten, the gallbladder compressed and releases stored bile into the duodenum to help break down the fats.
Thus, Bile empties from the gallbladder into the common bile duct.
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The brain and spinal cord work together so the body can receive signals and react to the environment. what is the spinal cord?
Answer:
cross section iv
Explanation:
Answer:
an organ for people on edge.
Explanation:
What is the function of the brain structure indicated by the arrow?.
Answer:
What Is The Function Of The Brain Structure Indicated By The Arrow? Coordination Of Complex Motor Patterns Processes Visual Data Conscious Thought Controls Emotions And Hormone Production This problem has been solved!
Explanation:
She's cooking dinner
Ema said
This is an independant clause, a full sentence, it is not a dependant clause cause it doesn't need a helping sentence to make it a full sentence
Which of the following statements describes a way in which bacteria differ from animals and plants?
A. Bacteria are not made of cells.
B. Bacteria do not reproduce.
C. Bacteria do not have specialized cells.
D. Bacteria do not maintain homeostasis.
How many major body regions does a crustacean have.
Answer:
this is the answer
Read it
The perception of color depends on the __________ of light an object reflects.
Answer:
The answer is Wavelength.
Explanation:
The perception of color depends on the Wavelength of light an object reflects.
Which environment is most likely to have the greatest levels of biodiversity?
To sum up the quote from the NY Times: IN ONE WORD, who was in support of the Earth Day campaign? * me and my partner ar stuck
The organization that was in support of the Earth Day campaign is the Environmental Protection Agency.
What is Earth Day campaign?It should be noted that the Earth Day campaign simply means the initiative that's done to ensure that the environment is kept safe for everyone.
The main idea behind it it to restore the Earth. Issues such as climate change, investing in the planet, etc are discussed.
In this case, the organization that was in support of the Earth Day campaign is the Environmental Protection Agency.
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Rock pocket mice are rodents native to the southwest. Normally, the rock pocket mice are tan colored rodents living in the sandy environment of the west. However, a mutation introduced an allele for dark fur. Scientists are now studying the populations of tan pocket mice living in the sandy environment along with the mutant black mice thriving on dark lava rock from an old lava flow. The rock pocket mice are living examples of evolution occurring today. Which of these statements DOES NOT support that idea?
A) Organisms develop mutations to help them survive.
B) Mutations that increase the fitness of an organism increase in frequency in a population.
C) The selection pressure can be different depending on the particular environment.
D) A mutation is a random change to an organism's DNA sequence
The statement does not support the idea "A mutation is a random chance to an organism's DNA sequence." This is further explained below.
What is a Rock pocket mice?Generally, this mouse is known for its avoidance of owls, it consumes mostly plant seeds and digs little tunnels in the dirt near or beneath rocks.
In conclusion, The visual predator favored the tan mice on the dark rock. Hence, A mutation is a not random change to an organism's DNA sequence.
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Answer:
Organisms develop mutations to help them survive.
Explanation:
I took the test.
The epithelium of the nasal cavity, nasopharynx, trachea and bronchi is ciliated ___________________________________ columnar epithelium, often with goblet cells
Answer:
pseudostratified
Explanation:
The epithelium of the nasal cavity, nasopharynx, trachea and bronchi is ciliated pseudostrtisfied columnar epithelium, often with goblet cells
Which of the following is a characteristic of unicellular organisms?
1. They can possess tissues and organs.
2. All of their functions are performed by a single cell.
3. They are usually microscopic.
4. Each of their cells is specialized to perform a specific function.
how many cells are in this picture? and which phase are most of the cells in-interphase, mitosis or cytokinesis
Answer:
~100 cells,
Explanation:
I counted around 102 cells in the picture. For your seond question I am a bit confused.
You asked what phase are they in and gave interphase, mitosis and cytokineses as the options. While interphase and cytokinesis are phases of mitosis. Therefore in theory all the cells are going through mitosis.
Since most of the cells are looking like dense balls, we can say they are going through interphase.
P.S. I also see some going through anaphase, metaphase and cytokinesis, but they are seldom in numbers compared to interphase cells.
Why are some body cells responsive to a particular hormone, whereas others are not?.
Answer:
Why are some body cells responsive to a particular hormone, whereas others are not?
Responsive cells express a specific receptor for the hormone.
Explanation:
What is the difference between a mold and a cast fossil?.
Answer:
The difference between a mold and a cast fossil are a mold fossil is generated when an object is deposited in soft mud and then removed by decomposition or physical forces; a cast fossil is formed when a mold fossil fills up with sediment.
Explanation:
Flowering plants have common ancestors with other plants and plant-like organisms. The table below shows the last common
ancestor shared between flowering plants and two other types of organisms.
Cone-producing plants
Last common ancestor with flowering plants
250 million years ago
500 million years ago
Green Algae
A scientist compares the amino acid sequences of a protein produced by flowering plants, a cone-producing plant, and green algae.
What prediction about these sequences is supported by the data in the table?
(1 point)
The amino acid sequences for flowering plants and cone-producing plants will be the most similar.
The amino acid sequences for all three organisms will have no similarities.
The amino acid sequences for all three organisms will be identical.
The amino acid sequences for flowering plants and green algae will be the most similar
Answer:
The amino acid sequences for flowering plants and cone-producing plants will be the most similar. O The amino acid sequences for all three organisms will be identical. O The amino acid sequences for flowering plants and green algae will be the most similar. O The amino acid sequences for all three organisms will have no similarities.
Explanation:
Answer:
The answer is B: The amino acid sequences for flowering plants and cone-producing plants will be the most similar.
Explanation:
I don't have an explanation. I just simplified the first persons thing.
Most organisms are known by their common names, which vary by region and language. They also have scientific names based on their classification. How are scientific names determined?
A. by using trinomial nomenclature, where the first part of an organism's name is its order, the second part is its kingdom, and the third part is its phylum
B. by using polynomial nomenclature, where the first part of organism's name its it order, followed by its domain, species, and kingdom
C. by using binomial nomenclature, where the first part of an organism's name is its genus, and the second part is its species
D. by using uninomial nomenclature, where the single name is a combination of the kingdom and order
Answer:
C is the answer
by using binomial nomenclature, where the first part of an organism's name is its genus, and the second part is its species
The addition of aldosterone _______. resulted in no change in urine volume decreased the urine volume to zero decreased the urine volume increased the urine volume
The addition of aldosterone resulted in a decrease in the urine volume and is denoted as option C.
What is Aldosterone?
This is produced in the adrenal gland and it helps to stimulate absorption of sodium by the kidneys.
It also regulates water and salt balance in the body which is why its addition leads to a decrease in the urine volume.
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Human gametes contain ________ chromosomes; somatic cells contain ________.
can heat energy be converted into chemical energy
Answer:
yesitcan
Explanation:foundonweegy
I know this is a math problem but I keep getting scam links as answers in the mathematics subject. Could someone please help me on this?
Answer: just click it really fast then type in it it happens to me all the time
Explanation:
There is a maximum between the two input values -2 and 2.
A quadratic function is the function which has 2 as its highest power. Its genralised form is given as y=ax²+bx+c.
From the given table it can be observed that at extreme values of x, therefore, when x=-5 and x=9, the value of y is negative. Therefore, at any value above 9 and below -5, the value of the function will be always negative.
Further, it can be observed that the highest value of y is 9 which when the value of x is -1.
The only choice from the given option that includes -1 in its answer is -2 and 2.
To verify this a graph can be plotted for the function as shown below.
Hence, the maximum will be between -2 and 2.
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Do electric seals breath
Answer:
yea they breathe air.
Explanation:
Is fertile soil a renewable or nonrenewable resource?
Answer: fertile soil is an non renewable resource
Explanation:
During the cell cycle, proteins called cyclins bind to enzymes that send signals for the cell to progress through stages of cell replication. at the end of this cycle, the cyclins degrade to prevent further signaling for the cell to divide.
uncontrolled production of cyclins will most likely result in —
f) the formation of tumors
g) the immediate death of the cell
h) the transfer of cyclins to other cells
j) the formation of haploid cells
Uncontrolled production of cyclin proteins will most likely result in the formation of tumors (Option f).
What are cyclins?Cyclins are proteins that control the progression through the cell cycle by their interaction with specific kinases.
These cyclins-dependent kinases (cdks) can be phosphorylated as a control points during the cell cycle.
Uncontrolled production of cyclins will produce uncontrolled cells that divide forming tumors.
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what would happen if Jupiter's gravitational pull increased
Answer:
The amount of mass that planet Jupiter has in the solar system makes it approximately five times larger than all other planets in it. As Jupiter’s gravity pulled on another planet tightly, its diameter grew and it expanded. The density and gravity continued to increase, resulting in even more planet compression.
Explanation: