Answer:
The Laura tried to grow micro-organisms in culture broth medium in Petri-plates but the microbial growth was not observed even on the fourth day of culture which could be due to:
1. Laura could have not provided the correct broth medium maintaining the with pH and salt concentrations.
2. Microorganisms did not get optimal growth conditions.
3. The bacterial source could have died after the collection which could have lysed after their death and thus no longer visible.
we know that
so
therefore
<u>The answer is</u>
to convert millimeters into kilometers
Antoine should divide millimeters by 
I suppose the yellow peg is facing the green peg, in which case the green peg must be guanine.
The bases are associated in pairs. In each pair there is always a purine associated with a pyrimidine. The association is by weak bonds: the hydrogen bonds, two bonds for an AT pair; three links for a GC pair. When we know the sequence of one strand we can deduce the sequence of the other strand. The two strands are oriented opposite to the 3 'and 5' ends (the strands are called antiparallel).
Answer: E
<span>Neurons are cells
that facilitate communication from one part of the body to another and signals
are send as mean of communication which can be achieved through electrical
potentials. Thus, cell membrane around the neuron usually create ionic potentials
by separating various ions across tis cell membrane. However, the place where
most processes that involved in neuronal preservation and functioning are
triggered is known as neuronal membrane.</span>
Answer: Venus, Mercury and Mars are the differentiated planets.
Planetary differentiation can be defined as the process by which the separation of different types of constituents takes place. They are differentiated on the basis of their chemical or physical behavior.The denser material of the planets sink to the center of the planet and the less denser particles rise at the surface of the planet.
