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lesya692 [45]
3 years ago
9

When is an atom unlikely to react and form chemical bonds?

Biology
2 answers:
kherson [118]3 years ago
6 0
When the outer valence shell is full with electrons. This is shown by the lack of reactivity of the noble gases.
ivanzaharov [21]3 years ago
5 0
An atom is unlikely to react when it is stable. That is when it's shell is complete. Due to the completion of the shell, no other electron can combine through any form of bonding. Hope i helped.
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Hypothesis that states that the continents were once one large mass that broke apart?
Talja [164]

Answer:

Continental drift

Explanation:

Alfred Wagener told about continental drift. He said that continents were a single land mass called Pangaea. They were separated and relocated in the form of different continents. The drifting happens due to the movement of tectonic plates above the magma. As a result, the land mass was broken down into different landforms.  These broken parts were carried slowly and form the continents. The continents are now also moving slowly

5 0
3 years ago
Read 2 more answers
Which of the following is an example of a renewable resource?
Vika [28.1K]

A renewable resource is a resource that can be renewed/or replinished meaning the Sustainably Harvested seafood must be your answer. Natural gas takes too long to replenish so it is considered non-renewable. You can bring back sand once it's gone nor Methane Hydrates.


Sustainably harvested seafood


hope this helped

4 0
3 years ago
Base Sequence of Complementary DNA Strands One strand of a double-helical DNA has the sequence (59)GCGCAATATTTCTCAAAATATTGCGC(39
umka2103 [35]

Answer:

(3')CGCGTTATAAAGAGTTTTATAACGCG(5')

Explanation:

<em>The complementary strand is :</em>

(5')GCGCAATATTTTGAGAAATATTGCGC(3')

<em>The base sequence of the complimentary strand is:</em>

(3')CGCGTTATAAAGAGTTTTATAACGCG(5')

Because this sequence is self-complementary, the individual strands can form  hairpin structures. The two strands together may also form a cruciform.

Hairpin structures can be formed by sequences with inverted repeats through two major mechanisms.

  1. DNA is single stranded in cellular processes such as; during replication on the template for lagging-strand synthesis,  bacterial conjugation, natural transformation, and infection by some viruses. Single stranded DNA can fold into secondary structures recognized by proteins, involved in site-specific recombination, transcription, and replication.
  1. Hairpins can also be formed from double-stranded DNA  as a cruciform. A cruciform is a structure consisting of two hairpins extruding through intrastrand base pairing from a palindromic or inverted-reverse sequence.
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3 years ago
3. Humans, rabbits, and zebras all have an appendix, an extra piece in their digestive system, although in human is much smaller
dedylja [7]

Answer:

i-

Explanation:

4 0
3 years ago
Clayton is a 19-year-old college student. He avoids milk, because he claims drinking the beverage upsets his stomach and gives h
DiKsa [7]

Answer:

b) lactose intolerance.

Explanation:

  • Lactose intolerance is the inability to digest lactose in milk and dairy products due to the deficiency or complete absence of the enzyme lactase.
  • Lactase converts lactose into glucose and galactose.
  • In this case, Clayton is intolerant to milk but can digest yogurt and some kinds of cheeses.
  • Yogurt and aged cheeses contain trace amounts of lactose.
  • During the manufacturing of cheese and yogurt, most of the lactose is drained along with the water and whey proteins.
  • In aged cheeses such as Cheddar, Parmesan and Swiss, the trace, left over lactose is further drained during the process of aging.
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