Nicolaus steno set down two geologic principles. what are they

2 answers:

5 0

Nicolaus Steno was a Danish geologist who gave two geological principles.
1. Principle of Original Horizontality - This principle states that sediments are deposited in the form of horizontal layers under the action of gravity.
2. Principle of Lateral Continuity - It states that the layers of sediments are deposited laterally in all directions in a continuous manner over the Earth's surface.

s2008m [1.1K]2 years ago

4 0

Nicolaus Steno set down two geologic principles, they are:
1. Principle of original horizontality: it states that layers of sediments are originally deposited horizontally under the force of gravity.
2. Principle of lateral continuity: it states that layers of sediments initially extend laterally in all directions.
These two principles are important in the analysis of folded and tilted strata.

Top answer:

The ammonia solution (NH3) of 25% means 25 gr NH3 in 100 ml water.

Explanation:

7 0

2 years ago

A zebra mussel is discovered in a lake in Pennsylvania for the first time. Why would this make an ecologist worried?

Elena L [17]

Answer:

Explanation:

Zebra mussels can be a nuisance in novel ecosystems. When introduced in a non-native ecosystem with no natural predators, they reproduce rapidly displacing native mussels. Zebra mussels take up much of the algar that feeds the other native species hence starving them to death and causing their numbers to plummet. In addition, they attach to the other mussels and clog up power plants, that use the local water, water intakes.

4 0

3 years ago

Read 2 more answers

Nirenberg and leder used synthetic ‘triplets’ of rna. The purpose of these short rna molecules was to.

dmitriy555 [2]

Take the place of part of an mRNA within the ribosome.

Rna triplets

The nucleotide sequence copy of a gene is present in the mRNA. Each amino acid is represented by a triplet of the four nucleotide bases that make up the genetic alphabet. The relationship between triplet sequences and amino acids is known as the genetic code.

A codon is a triplet of RNA nucleotides that codes for a particular amino acid. To the ribosome, where translation takes place, the tRNA transports certain amino acids. During translation, the anticodons in the tRNA bind to the codons in the mRNA templates. It is essential for the codon and anticodon to interact in order to pair the codon with the appropriate amino acid.

In mRNA, each trio of nucleotides is referred to as a codon, and each codon designates a certain amino acid (hence, it is a triplet code).

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7 0

6 months ago

The development of new neurons in humans has been documented in the _____ and the _____.

White raven [17]

In humans, new neurons are continually born throughout adulthood in two regions of the brain:

· The subgranular zone (SGZ), part of the dentate gyrus of the hippocampus.

· The striatum; however the adult-born neurons are a type of interneuron, not a type that projects to other brain areas.[5]

In other species of mammals, particularly rodents, adult-born neurons also appear in the olfactory bulb. In humans, however, few if any olfactory bulb neurons are generated after birth.

8 0

2 years ago