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leva [86]
3 years ago
8

Action potentials received directly from ________________ stimulate the papillary muscles to contract allowing for the proper __

_____________ of the AV valves.
Biology
1 answer:
BartSMP [9]3 years ago
7 0
Atrioventricular node; closing
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anticodon sequence of three nucleotides on a tRNA molecule that bond to a complementary sequence on an mRNA molecule.

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What is the mRNA base sequence created from the DNA base sequence of GAA TAG GTA
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Refer to this portion of a dichotomous key for fish identification to answer the question. According to this dichotomous key, an
dybincka [34]

According to this dichotomous key, any catfish must be leathery, that is, without scales. They have a flattened body, as in most fish with benthic habits, that is, they live at the bottom of the waters. Coloration varies from bluish gray to yellow. It can reach 1 meter in length and weigh about 5 kilos.

<h3>What is catfish?</h3>

Catfish and catfish are common designations given to fish of the order Siluriformes in most of South America.About 2,200 species of these fish are known, classified into almost 40 families (only two, Ariidae and Plotosidae, have marine species). They are found almost all over the world, but more than half of the known species are native to South America.

With this information, we can conclude that the catfish (Ictaluruspunctatus) is a representative fish of the order Siluriformes, family Ictaluridae, characterized by not having scales.

Learn more about catfish in brainly.com/question/14774645

#SPJ1

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