If the half-life of a radioactive substance is 500 million years and you have
192 atoms of it, how many half-lives will have passed by the time that only 3
atoms of the substance remain?
A. 4
B. 5
C. 6
D. 2.
The number of half-lives that has elapsed when 3 atoms of the radioactive substance remains is 6 (Option C)
Data obtained from the questionHalf-life (t½) = 500 million yearsOriginal amount (N₀) = 192 atomsAmount remaining (N) = 3 atoms Number of half-lives (n) =?How to determine the number of half-lives2ⁿ = N₀ / N
2ⁿ = 192 / 3
2ⁿ = 64
2ⁿ = 2⁶
n = 6
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The following diagram shows the branching tree diagram for some animals. (5 points)
A slanting line is shown. There are five lines drawn vertically on this line at equal intervals. Shark, Frog, Kangaroo, Lion and Chimpanzee are written on top of each vertical line in order from left to right. Common Ancestor is written on the left end of the line. There is a black circle between each pair of these vertical lines. The first black circle is before Shark and says Vertebrae. The second black circle is between Shark and Frog and says Lungs. The third black circle is between Frog and Kangaroo and says Mammary gland. The fourth black circle is between Kangaroo and Lion and says Placenta. The fifth black circle is between Lion and Chimpanzee and says Large brain.
Which two organisms share the least number of derived characteristics?
Frog and kangaroo
Kangaroo and chimpanzee
Lion and chimpanzee
Shark and chimpanzee
Answer:
I think the Answer is shark and chimpanzee Edit: Just rechecked my Answer this is the correct answer
Sorry for being late :(
Answer:
a
Explanation:
which statement about the cells of organisms is accurate?
A. plants are unicellular organisms and carry out functions of life.
B. All organisms are multicellular and carry out similar functions of life.
C. The single cell of a unicellular organism carries out all functions of life.
D. The single cell of a unicellular organism can have specialized functions.
Answer: HI I think i can help You!
B is the correct answer
Explanation:
C is the correct answer!
if skeletal muscles worked like cardiac muscles, how would your body's motion change?
Answer:
The integrated action of joints, bones, and skeletal muscles produces obvious movements such as walking and running. Skeletal muscles also produce more subtle movements that result in various facial expressions, eye movements, and respiration.
Which are characteristics of carbon? Check all that apply.
Explanation:
Terms in this set (5)
carbon is abundant, common.
forms strong covalent bonds.
has four valence electrons.
variety of shapes.
bonds with multiple elements
Answer:
- Covalent bonding
- Generally in non-electrolytes
- Low melting point
- Forms a variety of compounds
Explanation:
Edge 2021
At what point on the graph is the carrying capacity of rabbits reached?
Answer: 60
Explanation:
What is the function of a channel of protein
1. Substances out of the cell
2. Make phospholipids
3. lung infections
4. Contain the cells DNA
5. DNA
Answer:
its contain the cells DNA
1. What is one similarity between human skeletal muscles and some bacteria? *
Answer:
Both produces lactic acid when oxygen is not available for respiration.
Explanation:
Discuss the primary advantage of sexual reproduciton over asexual reproduction
Your answer:
I NEEED HELP AS QUICK AS POSSIBLE!!!
Answer:
It will maybe be B or CCuase ik it's not A or D
The vesicles involved in endo/exocytosis are surrounded by a phospholipid membrane.
A. True
B. False
Answer:
A. True
Explanation:
The vesicle travels to the cell membrane. The vesicle fuses to the plasma membrane, during which the two bilayers merge. The vesicle's contents are released into the extracellular space. The vesicle either fuses with or separates from the cell membrane.
can someone help me please
Answer:
the same ....... mhm...
..
The central nervous system (CNS) contains a number of components that perform specific functions within the body.
Some functions, such as breathing, swallowing, and blood circulation, are involuntary, or done without conscious
control. Which part of the CNS is responsible for these functions?
Answer:Autonomic nervous system
Explanation:
3.- De esta imagen podemos concluir de las
ondas, que:
be
PC
A - Todas tienen la misma amplitud de onda
B.- La frecuencia de A es menor a la de o
C.- Todas tienen la misma frecuencia
D.- Todas tienen la misma longitud de onda
Answer:
Explanation:
B
The sex of an offspring is determined by
O the father.
O both parents.
O the offspring
o the mother.
Structures and behaviors for animals to obtain food
Select one:
a.
Adaptations
b.
Respiration
c.
Digestion
Answer:
B. Adaptations
Explanation:
Cual es mi nota 80\68.Panama
Explanation:
81.
pasando los 50 puntos de la segunda parte ya se considera un punto más.
What is the purpose of meiosis?
Answer:
to produce gametes
Explanation:
The purpose of meiosis is to allow the production of genetically distinct haploid daughter cells from a diploid parent cell.
Pls, help me with this question
the answer should be mRNA, hope this helps!
Which of the following consists of an amino group, a carboxyl group, and a
side chain?
A. DNA
B. An amino acid
C. A nucleotide
D. A carbohydrate
Answer:
An amino acid
Explanation:
Which of the following is NOT a function of Keratinocytes.
Explanation:
babanaj mamlalai kaakk
1. Which of the following is the template for the production of RNA within a cell?
DNA
ATP
Protein
Carbohydrate
Question 18
1 pts
¿la sangre que sale del corazon y va hacia los pulmones tendra mayor proporcion de o2 o de co2?
I need help pleaseeee
what animal is the descendant of Gilmoreosaurus
Answer:
Dinosaur is the descendant of Gilmoreosarus.
Answer:
Dinosaurs!
Explanation:
help pls due soon thanks :)
Answer:
2
Explanation:
Mitosis is a process where a single cell divides into two identical daughter cells (cell division). During mitosis one cell? divides once to form two identical cells. The major purpose of mitosis is for growth and to replace worn out cells.
web-
My answer would be 2
The Pedigree below tracks colorblindness through a family.
What does a circle represent?
O Female
O Carrier
Child
O Male
Why would it be hard to find the ideal CO2 level if the light intensity were very low?
It would be difficult to find the ideal CO2 level with a low light intensity because the plant will have a difficult time trying to survive.
What is the most common type of desalination plant in the world?
Answer:
The Hadera seawater reverse osmosis (SWRO) desalination plant in Israel is the largest seawater desalination plant in the world.
2. How do you think heart and kidney transplants compare to other transplants, such as of the lungs?
I really don't no chile
What is the advantage of having air spaces within leaves?
Explanation:
The air spaces within the leaves help in exchange of gases and also help in transpiration