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Brums [2.3K]
3 years ago
12

What were the old models of the solar system?

Biology
1 answer:
Jobisdone [24]3 years ago
6 0

the models of the solar system were the couple of planets and a very big star. AKA the sun

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Which of these characteristics apply to viruses? Select all that apply.
Olegator [25]

The characteristics that apply to viruses are;

  • Viruses are made of RNA or DNA.
  • Viruses have a protein coat

<h3>What are viruses?</h3>

Viruses are microscopic non-cellular structure consisting of a core of DNA or RNA (nucleic acid) surrounded by a protein coat (capsid).

A virus is considered as by non-living because it requires a living host cell to replicate, and often causes disease in the host organism.

Therefore, the characteristics that apply to viruses are;

  • Viruses are made of RNA or DNA.
  • Viruses have a protein coat

Learn more about virus at: brainly.com/question/1427968

SPJ1

7 0
2 years ago
Give two names for a hydrogen atom with a missing electron
Marina86 [1]

Answer:

Cation,anion

Explanation:

6 0
3 years ago
If you needed copper, which mineral would you prefer to mine: chalcopyrite or bornite?
nekit [7.7K]

Answer:

Bornite

Explanation:

cause

7 0
3 years ago
A newborn with a cleft lip and palate is born to a mother who has a history of epilepsy. Which drug might be responsible for thi
ELEN [110]

Topiramate

Topiramate is the drug which might be responsible for this malformation.  

Topiramate is an anticonvulsant drug which is taken alone or with other drugs to prevent and control epilepsy. Topiramate is produced in four forms and are all taken by mouth. Topiramate has many side effects which include birth defects if is taken during pregnancy, osteoporosis, vision loss, nervousness and upper respiratory tract infection.


5 0
3 years ago
Define the 3 signals for activation and the 3 outcomes of the complement system.\
sp2606 [1]
* More than 40 proteins and glycoproteins involved in the complement system are synthesized by the liver, macrophages, epithelial cells, they are present in the blood in plasmatic form, membrane, some have an enzymatic activity, regulator or membrane receptorThese are elements of the humoral innate immune response, they fight infections, purify immune complexes and apoptotic bodies.
<span>There are indeed three ways to activate the complement:</span>
Classical pathway: Activated by Immunoglobulins in immune complexes, aggregated Immunoglobulins, DNA, CRP, apoptotic bodies .......it involves nine fractions, starting with C1, then C4, C2, C3, to form a classical C5 convertase, then, activation of C5, C6, C7, C8, C9.

Alternative pathway: activated by polysaccharides (bacterial endotoxin), vascular wall poor in sialic acid, aggregated IgE ...C3b like is the first component in the alternate channel cascade, it will create an amplification loop, and form an alternative C5 convertase.

Lecithin pathway: Activated by mannose, fucose (carbohydrate of microorganisms)The first component is the complex MBL / MASP1 / MASP2: "mannose-binding protein": works according to the same principle as the complex C1 of the classical way (MASP2 cleaves the C4 and the rest of the cascade is equivalent to that of the classical way).

the three ways have the same outcome: A C5 convertase (formed by one of the pathways) cleaves C5 into C5a and C5b: C5b is deposited far from other fractions on the antigenic surface. The fixation of C5b in the cell is followed by that of C6, C7, C8, and C9 (9 molecules of C9): formation of the membrane attack complex (MAC) ==> Death of the cell by osmotic shock
8 0
3 years ago
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