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BigorU [14]
3 years ago
8

Manta rays, sting rays, and eagle rays are similar to lampreys in that they have cartilagenous skeletons. how are they different

from lampreys?
Biology
1 answer:
Marina CMI [18]3 years ago
6 0
I think they are different in that they have jaws. Rays are predominantly marine and are found in all the oceans. Many are slow-moving bottom dwellers. They include, Manta ray which is one of the most known type of rays, Spotted eagle ray (pacific ocean), sting ray  among others. They are about 15 types of rays in the oceans.  Sharks, Lampreys and rays, like all fishes they are aquatic, water-breathing vertebrates with a brain and spinal cord, fins, plate-like pairs of internal gills, and paired sense organs. 
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irinina [24]

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2 years ago
All of the systems that are aroused by the _____________ are relaxed by the ________________. autonomic nervous system; sympathe
Mariulka [41]
All of the systems that are aroused by the <span>sympathetic nervous system</span> are relaxed by the parasympathetic nervous system. 
<span>autonomic nervous system (ANS) is a part of the central nervous system that controls all parts that the human cannot have a control on (which are done automatically) like heart rate and breath
ANS is divided in two opposite systems: sympathetic and parasympathetic:
</span>Parasympathetic nervous system: caracterized by the tag "<span>rest and digest" it decreases the heart rate, blood pressure, and breath. It increases the gastrointestinal motricity, letting the organism resting (this happen after a meal).
</span>Sympathetic nervous system: caracterized by the tag "fight or flight" it increases the heart rate, blood pressure, and breath. It decreases the gastrointestinal motricity, letting the organism focus on its environment (this happen when we are in danger).
4 0
3 years ago
What are the predicted consequences of legislation for global warming on industry? please explain
sweet-ann [11.9K]
Industry will have to invest in clean energy solutions like tech to lower carbon emissions (smog) kind of like when legislation was put in place preventing industry from dumping toxic wastes into public areas and waterways.
3 0
3 years ago
Read 2 more answers
Non-photosynthetic species of Euglena are sometimes classified as which of the following?
IRISSAK [1]

Options are not provided in the question. The complete question is as following:

Non-photosynthetic species of Euglena are sometimes classified as which of the following?

a. zooflagellates

b. sarcodines

c. water molds

d. pyrrophytes

Answer:

a. zooflagellates

Explanation:

Zooflagellates are non-photosynthetic flagellates which lack cell walls or plastids. The mode of their feeding is by phagocytosis or endocytosis.

Non-photosynthetic species of Euglena are consider as Zooflagellates. Zoomastigophora is a phylum within the kingdom Protista. some of the diseases caused by zooflagellates  includes African Sleeping Sickness. they have a spherical, elongated body with a single central nucleus and form a symbiotic relationship with other organisms.

Hence, the correct option is a.

5 0
2 years ago
Which is a advantage of sexual reproduction over asexual reproduction
madam [21]
There is variation in DNA.
7 0
2 years ago
Read 2 more answers
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