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jarptica [38.1K]
3 years ago
11

What is a mitochondria?

Biology
2 answers:
Tamiku [17]3 years ago
8 0
The powerhouse of the cell
aliina [53]3 years ago
5 0
A mitochondrion is an organelle that produces energy
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A recent study of the marine hawksbill turtle's stomach contents revealed that sponges constitute a major portion of their diet.
bearhunter [10]

Answer:

These structures that protect the sponges from most predators, but not turtles, are spicules.

Explanation:

Sponges <em>skeleton</em> is composed of <em>calcium carbonate and siliceous</em> micro-structures called <u>spicules</u>. Their morphology is so varied that it is used in taxonomy for identification and classification.

There are different kinds of spicules:

-         <em>Monoaxonic spicule</em>: needle-shaped, straights or curves

-         <em>Tetraxonic spicules:</em> they have four prolongations

-         <em>Triaxonic or Hexaxonic spicules</em>

-         <em>Poliaxonic spicules </em>

Two terms can be applied to any of these spicules kinds:

-         <em>Megaspicules</em>: They are elongated and compose the main architecture of the sponge skeleton

-         <em>Microspicules</em>: Variable in shape and size, with ancillary functions

Sponges have few predators thank to the spicule structures and their high toxicity. Many of them are capable of perforating soft tissues and producing urticant substances.

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3 years ago
Please help meeeeee<br>​
igor_vitrenko [27]

Answer:

i am so sory! i cant see the picture

Explanation:

7 0
3 years ago
How do atomic mass and atomic number compare for helium? look up a periodic table to see the square for helium.
larisa [96]
I believe the answer is C. (:
5 0
3 years ago
Read 2 more answers
Natural selection has not eliminated many harmful conditions and nonadaptive characteristics that appear during old age. This is
SashulF [63]

Answer:

The theory of aging evolution

Explanation:

The theory of aging evolution seeks to investigate the reasons why living beings begin a degeneration process at a certain age, among the various theories proposed is that of <em>Peter Brian Medawar</em> proposed in 1952, who claimed that natural selection avoided these mutations malignant <em>during the reproductive stage</em> to avoid the reduction of the population, however once this stage concluded the selection allowed them to manifest themselves.

5 0
3 years ago
The best-accepted hypothesis for the dispersal of monkeys to the New World is: Group of answer choices platyrrhines evolved from
sveta [45]

Answer:

platyrrhines evolved from early anthropoids in Africa and rafted or island hopped across the Atlantic to South America. ( option A )

Explanation:

The best-accepted hypothesis for the dispersal of monkeys to the New World is ;<em> platyrrhines evolved from early anthropoids in Africa and rafted or island hopped across the Atlantic to South America.</em>

The group of answer choices are various hypothesis about the dispersal of monkeys but the best-accepted hypothesis is the first option ( Option A )

6 0
2 years ago
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