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
blondinia [14]
3 years ago
15

When light energy excites electrons in photosystem where do the electrons to replace them come from

Biology
1 answer:
mel-nik [20]3 years ago
8 0
Light excites the electrons in chlorophyll a molecules of photosystem 1. As these electrons move to another primary electron receptor, electrons from photosystem 2 replace them.
Therefore the answer is FROM PHOTOSYSTEM 2.
You might be interested in
Why do scientists assign each organism a universally accepted name?
Akimi4 [234]
So the organisms could be classified in the same animal families
3 0
3 years ago
Please help ASAP!! A mining company's reclamation plan is not permitted because there is no evidence that funding has been secur
klio [65]

Answer:

Cost Issue

Explanation:

Their funding hasn't been secured to repurpose the land.

7 0
3 years ago
Read 2 more answers
The original remains of ancient animals such as saber-toothed cats have been perserved in _____.
PSYCHO15rus [73]
<span>bones and footprints preserved in stone are examples of fossils. Fossils hardened animal remains such as shells, bones, and teeth.</span> That is the best i can come up with. Hope it helps any.
4 0
3 years ago
You splice DNA fragments from a "foreign" source into the patient's gene so that the gene will begin manufacturing the enzyme. T
Arada [10]

Answer:

recombinant DNA

Explanation:

In molecular biology, recombinant DNA molecules are genetic sequences formed by combining DNA material from different sources (i.e., organisms, populations, species, etc). Proteins produced from DNA recombinant molecules are known as recombinant proteins. Molecular cloning is the most widely used technique in molecular biology in order to produce recombinant DNA molecules. In this technique, a cloning vector such as, for example, a plasmid of a bacterium, is used to insert a foreign DNA fragment into another cell which is then expressed in the host cell.

3 0
2 years ago
The number of times per week that exercise is performed is known as ________. Intensity frequency regularity time
Kruka [31]

The number of times per week that exercise is performed is known as frequency.

Exercise frequency answers the question how many times you workout per week total. This includes weight training workouts, cardio workouts.This is value that can vary depends on many factors specific to individual (age, weight, condition). Because of this, it’s impossible to say exactly how often(how many times) everyone should be working out per week total.


3 0
2 years ago
Other questions:
  • 30 points. Science natural resources
    11·2 answers
  • What are the consequences of high levels of fertilizing chemicals in water?
    14·1 answer
  • A Kelvin (K) is a unit of measurement in the International System of Units. Which quantity is measured in Kelvin?
    11·2 answers
  • Compunds are made up of ______ ? <br><br> 1. Electrons<br> 2. Cells<br> 3. Protons<br> 4. Molecules
    11·2 answers
  • Why would a grassland ecosystem have more primary consumers than a forest ecosystem? A - Trees are too large to be eaten by herb
    12·2 answers
  • How we save cities from floos
    11·2 answers
  • How would the genetic traits of a population change in response to an environmental pressure such as overfishing?
    5·1 answer
  • Earth science
    13·1 answer
  • Please help me with this question!!​ I really don't know how to do this?
    5·1 answer
  • Most earthquakes happen along the ?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!