HELPPPPP
Calcium-41 has a half-life of 80,000 years. At the end of 240,000 years,
how much Calcium-41 would remain in a sample initially containing 60
micrograms? *
A 7.5 micrograms
B 60 micrograms
C 15 micrograms
D 30 micrograms
If the half-life is 80,000 years, then 240,000 years would be equivalent to three half-lives. In other words, the initial amount of the radioactive calcium-41 would have been reduced in half three times over. Mathematically, this can expressed as
calcium-41 remaining = initial mass of calcium-41 × (0.5)³.
Since we are given the initial mass of calcium-41, the amount of calcium-41 remaining after 240,000 years would be:
60 μg × (0.5)³ = 7.5 μg, or 7.5 micrograms.
All living things are classified into kingdoms based on specific characteristics. Which of the following are only characteristic of the plant kingdom?
Answer:
divided into phylaits is the biggest group of living thingsAnswer:
autotrophic, eukaryotic cells, cell wall present
Explanation:
help 100 points please
Answer:
your answer would be B. the vascular tissue
Explanation:
There are two principal tissue types that make up the veins of plants: The xylem moves water and minerals. This flows from the plant’s roots upwards. The phloem moves food energy around the plant. This flows in whichever direction the plant needs it to flow. These two tissue types make up the vascular bundle of the plant.
hope you have a nice day
-kay :)
One choice contains ONLY biotic factors that might be found in a home aquarium's environment. That is
A)
fish, snail, and plants.
B)
fish, snail, and gravel.
water, gravel, and the glass wall of the aquarium.
D)
fish, dissolved oxygen, and bacteria living in the water.
Answer:
A) fish, snail, and plants
Explanation:
phloem contains specialized cells that move sugars and other nutrients both up and down in plants. Which object is the best model of one of these cells
Answer: B- Drinking Straw
Explanation:
In your letter, you need to explain how the theory of evolution is supported by evidence. Be sure to include the 4 pieces of evidence for evolution as well as an example of each.Evolution is a process of
Answer:Brudder bought a coconut, he bought it for a dime
His sister had anudder one, she paid it for de lime
She put de lime in de coconut, she drank 'em bot' up
She put de lime in de coconut, she drank 'em bot' up
She put de lime in de coconut, she drank 'em bot' up
She put de lime in de coconut, she called de doctor, woke 'im up
And said "Doctor, ain't there nothin' I can take?"
I said "Doctor, to relieve this bellyache?"
I said "Doctor, ain't there nothin' I can take?"
I said "Doctor, to relieve this bellyache?"
Now, lemme get this straight
You put de lime in de coconut, you drank 'em bot' up
Put de lime in de coconut, you drank 'em bot' up
Put de lime in de coconut, you drank 'em bot' up
Put de lime in de coconut, you called your doctor, woke 'im up"
Said "Doctor, ain't there nothin' I can take?"
I said "Doctor, to relieve this bellyache?"
I said "Doctor, ain't there nothin' I can take?"
I said "Doctor, to relieve this bellyache?"
You put de lime in de coconut, you drink 'em bot' togedder
Put de lime in de coconut, then you feel better
Put de lime in de coconut, drink 'em bot' up
Put de lime in de coconut and call me in the morning
Whoo-ooh-ooh, ooh-ooh-oooh, ooh-ooh, ooh-ooh-ooh-ooh
Whoo-ooh-ooh, ooh-ooh-oooh, ooh-ooh-ooh, ooh-ooh-oooh
Whoo-ooh-ooh, a-hoo, a-hoo, a-hoo, a-hoo, a-hoo, a-hoo, a-hoo
Brudder bought a coconut, he bought it for a dime
His sister had anudder one, she paid it for de lime
She put de lime in de coconut, she drank 'em bot' up
And put de lime in de coconut, she called de doctor, woke 'im up
Said "Doctor, ain't there nothin' I can take?"
I said "Doctor, to relieve this bellyache"
I said "Doctor, ain't there nothin' I can take?"
I said "Doctor, now lemme get this straight"
You put de lime in the coconut, you drink 'em bot' up
Put de lime in the coconut, you drink 'em bot' up
Put a lime in the coconut, you drink 'em bot' up
Put de lime in the coconut, you're such a silly woman
Put a lime in the coconut and drink 'em bot' togedder
Put de lime in the coconut, then you feel better
Put de lime in the coconut, drink 'em bot' down
Put de lime in your coconut, and call me in the morning"
Whoo-hoo, ain't there nothin' you can take?
I say "Whoo-hoo-ooh to relieve your bellyache?"
You say "Well whoo-hoo-ooh, ain't there nothin' I can take?"
I say "Whoo-hoo-ooh, to relieve your bellyache?"
You say "Yaa-ahh, ain't there nothin' I can take?"
I say "Yaa-ahh, to relieve this bellyache?"
I said "Doctor, ain't there nothing I can take?"
I said "Doctor, ain't there nothing I can take?"
I said "Doctor, ain't there nothing I can take?"
I said "Doctor, you're such a silly woman"
Put de lime in the coconut and drink 'em bot' togedder
Put de lime in the coconut, and you feel better
Put de lime in the coconut, drink 'em bot' up
Put de lime in the coconut and call me in the morning
Yes, you call me in the morning
You call me in the morning, I'll tell you what to do
If you call me in the morning, I'll tell you what to do
If you call me in the morning, I'll tell you what to do
If you call me in the morning, I'll tell you what to do
Well, if you call me in the morning, I'll tell you what to do
Explanation:
This is a map of a _ landform because ?
ASAP
Answer:
This is a map of a Mountain landform because the rings get smaller until the top of the mountain. Also the altitude goes up until it reaches the top.
Explanation:
What is the coding region of DNA called? Explain.
a- A gamete
b- A allele
c- A sister chromatid
d- A gene
Answer:
D-Gene
Explanation:
Because of the protein it get's. When it gets the protein it needs then they develop the gene therapy.
Which of the following explains the cellular function of a ribosome?
A
It is associated with attaching to the plasma membrane in active transport.
B
It is directly involved in the bonding of amino acids to synthesize proteins.
С
It is associated with microtubules and microfilaments to move organelles.
D
It is directly involved in the storage of energy by converting ADP to ATP.
Answer:
B
It is directly involved in the bonding of amino acids to synthesize proteins.
Answer:
It is associated with attaching to the plasma membrane in active transport.It is directly involved in the bonding of amino acids to synthesize proteins.
Explanation:
I hope this helps
can i use purified water for my aquarium?
Answer:
You should use mineral water but you can also use tap water too, as long as you remove chemicals that are potentially toxic to fish.
Explanation:
Answer:
You can use purified water if you like but mineral water is the best for fish
Explanation:
They both arent toxic but its whatever one you want
if a blue light shines on a green dress what colour would the dress be?
answer: if you shine a blue light on a green dress the blue would be reflected