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
belka [17]
3 years ago
14

Which two statements are true?

Biology
1 answer:
Nesterboy [21]3 years ago
6 0
We need more information
You might be interested in
The small blood vessels that distribute blood throughout the entire body are
Airida [17]

Answer:

cappillaries

they connect the arteries and the veins

7 0
2 years ago
What do scientists call regions of Earth that contain an unusually large number of species that are threatened by habitat loss?
Trava [24]

Answer:

The Correct answer is Bio-diversity hots pot

Explanation:

  • Biodiversity is the different form of life in a particular region where different types of species of organism lives. It helps and increases the stability of the Ecosystem.
  • Ecologist describes Bio-diversity by its three different attributes of biological organization.

There are three different types of Bio-diversity such as:

  • Genetic diversity
  • Species diversity
  • Ecosystem diversity

5 0
3 years ago
Read 2 more answers
I need help with this
ELEN [110]
B
Publish his findings in a research journal because he is experimenting what medicinal properties can be tested or are associated with the plant. He should have kept the notes in a research journal for making observations so B.
7 0
3 years ago
If 1/8 remains after 21 years, what is the half-life?
vagabundo [1.1K]

Half life formula

The number of unstable nuclei remaining after time t can be determined according to this equation:

N(t) = N(0) * 0.5^(t/T)

where:

N(t) is the remaining quantity of a substance after time t has elapsed.

N(0) is the initial quantity of this substance.

T is the half-life.

It is also possible to determine the remaining quantity of a substance using a few other parameters:

N(t) = N(0) * e^(-t/τ)

N(t) = N(0) * e^(-λt)

τ is the mean lifetime - the average amount of time a nucleus remains intact.

λ is the decay constant (rate of decay).

All three of the parameters characterizing a substance's radioactivity are related in the following way:

T = ln(2)/λ = ln(2)*τ

How to calculate the half life

Determine the initial amount of a substance. For example, N(0) = 2.5 kg.

Determine the final amount of a substance - for instance, N(t) = 2.1 kg.

Measure how long it took for that amount of material to decay. In our experiment, we observed that it took 5 minutes.

Input these values into our half life calculator. It will compute a result for you instantaneously - in this case, the half life is equal to 19.88 minutes.

If you are not certain that our calculator returned the correct result, you can always check it using the half life formula.

8 0
3 years ago
Solar energy is utilized to convert inorganic carbon, in the form of carbon dioxide, into organic carbon compounds, such as gluc
Lerok [7]
B) Photosynthesis The Sun is the ultimate source of all energy in the universe. Plants being the main primary producers or autotrophs, use solar energy to make their own food through photosynthesis, thus converting energy into the organic matter that can be consumed by all organisms. They  form the basis of almost all food chains from where consumers derive their food.
7 0
3 years ago
Read 2 more answers
Other questions:
  • During cell division, centromeres have separated, and chromatids are pulled apart, becoming chromosomes. What happens after the
    15·1 answer
  • Hairy stems (H) are dominant in tomato plants. Hairless stems (h) are present in tomato plants that are homozygous recessive for
    13·1 answer
  • ¿Cuál es el pH normal de la orina? ¿A qué se deben las diferencias de pH?
    12·1 answer
  • Which process provides most of the oxygen found<br> in Earth's atmosphere?
    8·1 answer
  • Describe examples of allopatric radiation in the madagascar-india landmasses and dusky salamanders.
    9·1 answer
  • Which statement about mitosis is true? (brainliest)(15points)
    8·2 answers
  • Why are there often delays in bringing GM-foods into the market? Select all possible answers.
    5·2 answers
  • Scientists have studied a fruit fly, Drosophila, to better understand early embryonic development and have discovered that the c
    9·1 answer
  • Explain how diffusion allows the small intestine
    9·1 answer
  • Evaluate the following claim, first from a neoclassical economist’s perspective and second from an ecological economist’s perspe
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!