1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lelechka [254]
3 years ago
14

A sample of rock is found to contain 100 grams of a parent isotope. How many grams of the parent isotope will remain after two h

alf-lives?
100

75

50

25
Biology
2 answers:
Alja [10]3 years ago
7 0
The answer is 50. I really hope this helps.
dalvyx [7]3 years ago
7 0

Answer:

25 grams

Explanation:

If you see only

100 and 25 then it's 25

You might be interested in
Where are the chromosomes of most organisms located?
kaheart [24]
Enclosed within the nucleolus of the cell.
6 0
3 years ago
Read 2 more answers
explain the role of the digestive system, the respiratory system and the urinary system in the removal of waste. how do these wa
Bezzdna [24]
The function of the digestive system<span> is </span>digestion<span> and absorption.</span>Digestion<span> is the breakdown of food into small molecules, which are then absorbed into the body. The </span>digestive system<span> is divided into two major parts: The </span>digestive tract<span> (alimentary canal) is a continuous tube with two openings: the mouth and the anus.</span>
7 0
3 years ago
According to the law of conservation of matter, matter is never created or destroyed. Yet in a food pyramid the amount of biomas
never [62]
It will be that the matter is recycled
6 0
4 years ago
Read 2 more answers
A biologist examines a series of cells and counts 160 cells in interphase, 20 cells in prophase, 6 cells in prometaphase, 2 cell
Marrrta [24]

Answer:

M phase: 4.8 hr

Prophase: 2.4 hr

Prometaphase: 0.72 hr

Metaphase: 0.24 hr

Anaphase: 0.84 hr

Telophase: 0.6 hr

Explanation:

Mitosis, also known as M phase, is the process of nuclear division after interphase, which is followed by cytoplasmic division via cytokinesis. Mitosis can be subdivided into the following phases: Prophase,  Prometaphase, Metaphase, Anaphase, and Telophase. In this case, 160 cells are in interphase (for a total of 200 cells), thereby 40 cells are in mitosis >> 200 - 160 = 40 cells. Since the complete cell cycle requires 24 hours, it is possible to calculate the average duration of each phase:

M phase: 40/200 = 0.2 x 24 hr = 4.8 hr

Prophase: 20/200 = 0.1 x 24 hr = 2.4 hr

Prometaphase: 6/200 = 0.030 x 24 hr = 0.72 hr

Metaphase: 2/200 = 0.01 x 24 hr = 0.24 hr

Anaphase: 7/200 = 0.035 x 24 hr = 0.84 hr

Telophase: 5/200 = 0.025 x 24 hr = 0.6 hr

3 0
3 years ago
Identify the branch of biological science that studies the external and internal structure of the body and the physical relation
Len [333]
This branch of science is known as anatomy.


  hope it helps u....
6 0
3 years ago
Other questions:
  • Which consist of sperm cells and egg cells? <br> gametes<br> tetrads<br> diploids<br> chromosomes
    15·2 answers
  • PLEASE HELPP MEEE I beg youu
    11·1 answer
  • Two technicians were discussing hybrid organic acid technology​ (HOAT) coolants. Technician A stated that hybrid organic acid te
    12·1 answer
  • Explain the evolutionary relationship between the fin of a fish and the flipper of a whale.
    14·2 answers
  • researchers conducted an experiment to identify the effects of three different hand sanitizer on the growth of bacteria the rese
    14·1 answer
  • Contrast the metabolic function of the TCA Cycle with that of the Reverse TCA Cycle using all of the following words correctly:
    15·1 answer
  • An enzyme lowers the energy of activation. What does that mean?
    10·1 answer
  • What is a description of binary fission?
    6·1 answer
  • The penis which is part of ..... system must become erect<br>​
    8·2 answers
  • Which organelle is labeled H?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!