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
Olegator [25]
3 years ago
14

HELP ASAP 20 POINTS!!!!!!!!!!!! 2 ANSWERS

Biology
2 answers:
HACTEHA [7]3 years ago
8 0

Answer:

Nitrogen, Calcium

Explanation:

im pretty sure.

Vaselesa [24]3 years ago
7 0

Answer:

A, and D

Explanation:

its the answer I believe

You might be interested in
The theory of plate tectonics helps to explain ____.
lorasvet [3.4K]
<span>The theory of plate tectonics helps to explain the </span>formation of the earthquakes.




3 0
3 years ago
Read 2 more answers
Describe two examples of experimental evidence that provide evidence that membrane proteins drift or move over time
aniked [119]

There are so many examples for that in different areas, like TPT1 experiment carried out in our lab recently.Here's one link: http://www.alfa-chemistry.com/tpt1-cas-167218-46-4-item-290583.htm

7 0
3 years ago
4. The clarity of lake water is affected by the amount of phytoplankton (marine plants), soil, clay, and other solids suspended
Leya [2.2K]

Answer:

More photosynthesis will occur. Explanation: ... If carbondioxide gas concentration increases, more rate of photosynthesis will occur.

Explanation:

6 0
3 years ago
Read 2 more answers
Why/how is biodiversity essential to the health of an ecosystem
Mumz [18]

Answer:

Biodiversity is the amount of variety of life on Earth.

Explanation:

Biodiversity boosts ecosystem productivity where each species, no matter how small, it has an important role to play.

<u>For example,</u>

a larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all forms of life.

7 0
3 years ago
An atom has an atomic number 17 and atomic mass number 35. How many neutrons are present in its nucleus?
Pie

Answer:

B. 18

Explanation:

An atom, which is the smallest indivisible particle of matter, further contains certain particles called SUB-ATOMIC PARTICLES namely: proton, neutron and electron. In a neutral/uncharged atom, the number of proton is equal to the number of electrons. The number of protons in an atom represent its ATOMIC NUMBER.

However, the sum of the proton number and neutron number gives the MASS NUMBER i.e. mass no. = proton no. + electron no.

Hence, according to this question which states that an atom has an atomic number of 17 and a mass number of 35. The neutron no. can be calculated as follows:

Neutron no. = mass no. - proton no.

Neutron no. = 35 - 17

Neutron no. = 18

8 0
3 years ago
Read 2 more answers
Other questions:
  • If one strand of DNA is ATTGAGCTA , the matching (complementary) strand would be?
    8·1 answer
  • Immediately after its stored atp is consumed, a working muscle relies on ________ to regenerate atp for contraction. anaerobic g
    6·1 answer
  • Which of the following categories includes the most distantly related organisms?
    9·2 answers
  • What is the scientific notation for .000056 grams?​
    6·1 answer
  • What can be done to improve soil fertility?
    11·2 answers
  • What are the three properties that mitochondria and chloroplasts share with prokaryotes
    5·1 answer
  • What must scientists look for in their experiment or their data to make sure it is accurate? A. Sources of error B. Observations
    8·1 answer
  • Which of the following is
    12·1 answer
  • Are environmental factors more likely to affect genotype or phenotype?
    13·1 answer
  • What would most likely happen if the power lines in a petroleum power plant were broken? the petroleum would not burn. steam wou
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!