Because organisms at different tropic levels get their energy from the organisms at the lower tropic levels.
Answer:
C. He forgot to add primers.
Explanation:
The major components of a PCR include:
- A sample DNA which is the DNA that needs to be amplified.
- A DNA polymerase, an enzyme that synthesizes new DNA strands from the sample DNA.
- A primer which represents the starting sequence for the new strand of DNA to be synthesized.
- Free nucleotides in form of Deoxynucleoside triphosphates (dNTPs)
<em>The graduate student forgot to add primers which are essential as a starting point on which the synthesis of new DNA strand is based. DNA ligase is not needed for PCR, but during DNA replication.</em>
The correct option is C.
Answer:
1.embryophyta
2.moss is a green flowerless plant that lack roots
3.found in moist shady
4.
Zippy Xylem. The xylem of a plant is the system of tubes and transport cells that circulates water and dissolved minerals.
Answer:
We can determine if something is a living thing by seeing if they show some of the living characteristics. These characteristics include:
Reproduction - to make more of the same organism
Sensitivity - the ability to detect and react to stimuli
Nutrition - eat and digest food.
Movement - the ability to change its position or location
Respire - to breathe / gas exchange
Excretion - get rid of toxic / materials in excess
All living things show the characteristics above.
For example, we can be sure that robots are not living things because they cannot excrete, respire, or reproduce even if they can move and sense stimuli from outside. We can also be sure that plants are living because they show all characteristics, even for movement, we don't obviously see that, but for example, they may grow towards a light source.