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kkurt [141]
3 years ago
14

What is the endosymbiotic hypothesis?

Biology
1 answer:
stepan [7]3 years ago
3 0

Answer: What does the endosymbiont hypothesis propose? It proposes that early eukaryotic cells acquired the precursors of mitochondria and chloroplasts by engulfing certain types of bacteria. ... Mitochondria, chloroplasts, and centrioles in eukaryotic cells each contain their own minute and unique supply of DNA.

Explanation:

The first piece of evidence that needed to be found to support the endosymbiotic hypothesis was whether or not mitochondria and chloroplasts have their own DNA and if this DNA is similar to bacterial DNA. This was later proven to be true for DNA, RNA, ribosomes, chlorophyll (for chloroplasts), and protein synthesis.

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The pectoral girdle supports the ________.<br><br> arms<br> legs<br> skull<br> thoracic cage
Lerok [7]

Answer: Option A. "Arms"

Explanation:

Pectoral girdle is also known as shoulder girdle, are the bones that attach upper limb to the axial skeleton.

Pectoral girdle majorly functions to support arms. It contains two bones, the  clavicle and scapula.

Pectoral girdle can also defined as the set of bones in the skeleton that connects to the arm on each side.

Hence, the correct option is A.

3 0
3 years ago
Can someone help me with question 8 and 9
Alborosie

Answer:

8. A

Explanation:

they are moved by strong, steady winds called unidirectional winds, which move from the south west to the north east

3 0
2 years ago
Read 2 more answers
How many words are you responsible for this week?
arsen [322]

Answer:

how are we supposed to know how many we read today?

Explanation:

because not many people count how many words they have each week.

6 0
3 years ago
Energy stored in the bonds that hold together the atoms and molecules of all substances is called
tekilochka [14]
<h3> ♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ The correct option would be D. Chemical energy.

This energy is released when a chemical reaction takes place.

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

3 0
3 years ago
The endosperm of a Conifer seed is:
riadik2000 [5.3K]

Answer:

A. Haploid (n)

Explanation:

Conifers do not exhibit double fertilization that forms triploid (3n) endosperm in flowering plants.

Endosperm in conifers develops from the haploid cell of female gametophyte before fertilization. Since the endosperm is formed by the mitotic divisions in the haploid cell (n) of female gametophyte, it is haploid (n) in nature.  

5 0
3 years ago
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