When conducting tests for the presence of a specific organic substance, it is very useful to include an Experiment control.
<h3>What are chemical changes?</h3>
A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions. Chemical reactions are usually characterized by a change in colour, heat change, precipitate formation and evolution of bubbles.
Example: Oxidation of magnesium
Thus, this could be the answer.
To learn more about chemical change click here:
brainly.com/question/23693316
#SPJ1
Flashcards or study on Quizlet.
Answer:
b. vitamin K deficiency.
Explanation:
A normal bleeding time in association with normal platelet count, and increased prothrombin time (PT) and INR, is indicative of vitamin K deficiency.
This ultimately implies that, when an individual is suffering from vitamin K deficiency, he or she would experience increased bleeding.
Answer:
Man #1
Explanation:
Man #1 with type AB can be ruled out.
Mother - Ai
Child - ii
The father would have to have at LEAST one i allele.
AB makes it impossible to have i (you can only have 2 alleles).
The other two men, (Man 2 - Ai and Man 3- ii), have the possibility of being a father.
I. Fruits aid in the dispersal of seeds by wind or by animals that carry or eat the fruits.
F. Seeds protect and nourish plant embryos, and fruits protect the seeds.
C. In many angiosperms, the male gametophyte contained in a pollen grain can be transported many miles away by wind or animal pollinators.
B. Seeds enable plant embryos to be dispersed long distances from the parent plant via wind or animals.
A. Flowers attract animal pollinators carrying pollen from other plants of the same species.
D. Floral parts of the saprophyte protect the reduced female gametophyte from drying out and from UV radiation.
