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Natalija [7]
3 years ago
15

*PLEASE HELP*

Biology
1 answer:
pantera1 [17]3 years ago
3 0
The results would vary between observing a population directly as opposed to observing them indirectly in a way that u will miss some factors, particularly, those observable factors, such as their daily and actual behavior
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Where should the origin of the swim bladder be placed on the phylogenetic tree?
dolphi86 [110]

Answer:

At the base of Actinopterygii

*This is a unique characteristic of this group.

Explanation:

A peculiar characteristic organ observed in ray-finned fish (as well as in Sarcopterygii, or lobe-finned fish) but not in cartilaginous fish like shark is the swim bladder.

This organ is often described to be a sac containing gas. It helps these set of fish adjust its buoyancy and its position in the water by regulating the concentration of gas present in it.

The swim bladder is formed as a pouch coming off the embryonic digestive tract, and in chondrosteans and holosteans, with a set of teleosts e.g. the eels, it maintains an open pathway to the esophagus. In majority of the bony fish, the swim bladder is totally sealed off, as gas levels in their swim bladder are regulated by producing gas into the bladder via a network of capillaries, the rete mirabile (Latin word for "marvelous net").

The swim bladder is homologous to the lungs of tetrapods. Since they are formed in the same vein. Few fishes that have an open swim bladder employs it as a breathing organ.

6 0
3 years ago
WILL MARK AS BRAINLIEST!
Citrus2011 [14]

Answer:

granite

Explanation:

3 0
3 years ago
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In what type of tectonic plates boundary do do the plates slide past each other
sergejj [24]

Answer:

A transform plate boundary occurs when two plates slide past each other, horizontally. A well-known transform plate boundary is the San Andreas Fault, which is responsible for many of California's earthquakes.

Explanation:

hope it helps u

plz mark me as brainliest

7 0
3 years ago
Question 4 of 25
Valentin [98]

Answer:

B. Cellulose

Explanation:

Polysaccharide are substances that contains many units of monomers called MONOSACCHARIDE. They are carbohydrate molecules consisting of very long chains of monosaccharides like glucose, galactose etc.

An example of molecule that forms from strong chains of polysaccharides is CELLULOSE, which consists of long chains of glucose units linked together by B-1,4-glycosidic bonds. Cellulose is the most abundant polysaccharide on Earth found in plant cell walls.

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3 years ago
Similar structures that evolved independently are called
poizon [28]
Similar structures that evolved independently are called analogous structures
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