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Alecsey [184]
2 years ago
7

What protective body structuresp dose a starfish possess​

Biology
1 answer:
bezimeni [28]2 years ago
6 0
Spines. Sea stars are echinoderms, which means 'spiny skin'. Most sea stars have rows of spines (or tiny spines called spicules) on their topside for protection from predators. Some sea stars also have shorter spines underneath, alongside their tube feet.
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Why are photosynthetic organisms called producers in an ecosystem?
ololo11 [35]
Hello!

They are called producers because they're able to produce their own food by the process of photosyntessis.
3 0
3 years ago
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A bird flies by moving its wings up and down. Which two systems are most directly responsible for the movement of a bird's wings
aleksklad [387]
A. Skeletal and muscular
the other three don’t have to do with this type of internal movement though as the abdominal region and internal organs don’t have to do with this, A is the only possible answer
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3 years ago
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Name and describe three ways in which populations can become isolated.
erica [24]

Answer:1. not enough natural ingredients like food and water, 2. the people your are surrounded in the environment, 3. the laws or rules that apply to living in gov./environment

Explanation:

1. maybe there aren't enough local stores in your area and you have to walk or drive miles just to get there, 2. maybe you have some connotation with people around you, or they themselves are setting good examples for you or your family, the community is too crowded, 3.maybe you want to leave a country because the system doesn't work for you, discrimination laws or a form of unfairness and mistreatment. maybe  too intrusive.

8 0
3 years ago
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Why are shape, weight, mass, size,<br> and texture NOT considered properties?
goldenfox [79]

Answer:

Density is an intensive property. This means that regardless of the object's shape, size, or quantity, the density of that substance will always be the same. ... It is because density in an intensive property of matter. So they are not considered properties.

Explanation:

8 0
2 years ago
Total nucleic acids are extracted from a culture of yeast cells and are then mixed with resin beads to which the polynucleotide
mr Goodwill [35]

The question is incomplete as it does not have the options which are:

(a)DNA (b)tRNA (c)rRNA (d)mRNA

Answer:

Option-mRNA

Explanation:

The mRNA is synthesized from the DNA and which is also a type of nucleic acid. When the nucleic acid is extracted from the yeasts and then mixed with the resin beads to which the polynucleotide with thymine base oar is attached.

The mRNA will bind to the resin bead as the mRNA after synthesis undergoes modification and attaches poly A tail to the end of the mRNA at 3' end.

This poly-A tail has adenine which easily binds to the thymine and thus mRNA easily attaches to the resin bead.

Thus, mRNA is correct.

5 0
2 years ago
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