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
AfilCa [17]
3 years ago
5

The exchange of nutrients and oxygen between body and blood occurs in the..?

Biology
1 answer:
galina1969 [7]3 years ago
5 0
Exchange of nutrients occurs in the digestive system. Exchange of oxygen occurs in lungs
You might be interested in
Why do we rarely see food chains with quinary (5th level) consumers?
love history [14]

Answer: Energy is passed up a food chain or web from lower to higher trophic levels. This loss of energy explains why there are rarely more than four trophic levels in a food chain or web. Sometimes there may be a fifth trophic level, but usually there's not enough energy left to support any additional levels.

Explanation: :) Hope it helps

6 0
3 years ago
Read 2 more answers
Give an example of seedless vascular plants
pantera1 [17]

Answer:

Ferns, club mosses, horsetails, and whisk ferns are some examples of seedless vascular plants .

Explanation:

3 0
3 years ago
6. (3 pts) After transformation, 40 colonies were present on the plate. What is the transformation efficiency of the competent c
natali 33 [55]

Answer:

Given:

Number of colonies on plate = 40

Amount of DNA used for transformation = 100ng

Volume of competent cells used = 100ul

Total volume = 1ml (1000ul)

Volume plated for growth = 200ul

The amount of cells transformed per 1 µg of DNA is called the transformation efficiency

(CFU is colony forming units) => (number of colonies on plate/ng of DNA plated) X 1000 ng/µg = CFU/µg of DNA

Amount of DNA used for plating = 100ng * (200/1000)

                                                      = 100ng * (1/5)

                                                      = 100/5 = 20ng

Efficiency calculation = 40 colonies / 20ng = 2 colonies/ng

               (2 colonies/ng) * (1000 ng/µg) = 2000 CFU/ug DNA

Transformation efficiency = 2000 Transformants / ug DNA

                                          = 2 x 10³ Transformants / ug DNA

Explanation:

Efficiency of transformation is highest in the 100 pg-1 ng range, so Low transformation efficiency could be because of high amount of DNA used for transformation.

6 0
3 years ago
Name two natural forces that can shape valleys and mountains?
RideAnS [48]
Volcanoes and erosion.
7 0
3 years ago
Read 2 more answers
Please I need help! What effect do enzymes have on biochemical reactions?
Readme [11.4K]

Answer:Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. So enzymes speed up reactions by lowering activation energy

8 0
3 years ago
Other questions:
  • What are the possible genotypes of the gametes?
    8·1 answer
  • narwhals are aquatic mammals known for the giant tusk that protrudes from their upper lip. these mammals live in arctic waters a
    7·1 answer
  • QUESTION 16 Each codon in a sequence code for what?
    13·1 answer
  • que son los halogenos {porfavor nesecito la respuesta resumidad en propias palabras ya que la maestra no quiere que sea la misma
    12·1 answer
  • Which measurement do geologists use to find the absolute age of once-living things?
    7·2 answers
  • Drag each tile to the correct location
    12·1 answer
  • The percent of oxygen saturation of hemoglobin when the temperature is 38 degrees centigrade is
    9·1 answer
  • Energy _____ as it transfers from one consumer to the next
    14·2 answers
  • The carbon dioxide humans breathe out is produced
    10·1 answer
  • White Leaf Disease is a devastating disease that
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!