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Sunny_sXe [5.5K]
3 years ago
11

Which of the following is not a component of a virus

Biology
2 answers:
xeze [42]3 years ago
6 0
Tail section .......
Juliette [100K]3 years ago
4 0
Tail section is the answer
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A key derived character of sharks and rays that distinguishes them from ray-finned fishes is
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Answer:

Jaws and a swimming bladder

Explanation:

A defining characteristic between sharks and rays that distinguish them from ray-finned fish is the *possession of jaws in sharks* and rays;and the *possession of swimming bladder in ray-finned fishes*.

Characteristics of sharks and rays are as follows :

They are cartiiliginous fishes; they possess *strong jaws* lined with teeth; body dorsoventrally flattened, fusiform (spindle shaped) with heterocercal tail(diphycercal in Chimaeras); paired fins; *no swimming bladder or lungs*; pelvic fins in males often modified to form clappers; Gill arches internal to gills; reduced notchord; lateral-line system; paired nostrils; internal nares absent; separate sexes; internal fertilization and direct development; oviparous, oviparous, or ovoviviparous. Examples include, Spiny dog fish or dog shark, Ray Raja, Chimaera.

Characteristics of ray-finned fishses:

They generally lack paired fins; no internal nares; *air sacks usually function as swimming bladder*; skeleton usually well ossified. Blind olfactory sacs (do not open into the mouth); Tail homocercal. Examples include Tilapia, Claris,and Polypterus.

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3 years ago
How are internal and external fertilization alike?
xxMikexx [17]

Answer:

Explanation:

Internal fertilization is the process when the syngamy (union of male and female gamete) occurs inside the female body after insemination using copulation. In contrast, External fertilization is the syngamy outside the female body, that is in the outer environment especially in water bodies

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Transcription is a process of copying DNA into messenger RNA (mRNA). Since DNA is in the nucleus, transcription must occur in the nucleus. Free mRNA leaves the nucleus and enters the cytoplasm. There, mRNA serves as a template for protein synthesis. This process is called translation and it occurs in the cytoplasm.
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