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kondor19780726 [428]
3 years ago
7

Describe the evidence that suggests that mitochondria were acquired before plastids in eukaryotic evolution.

Biology
2 answers:
8090 [49]3 years ago
8 0

Answer:

Mitochodaria is present in majority of cells and plastid is present only in in few.

Explanation:

Endosymbiosis theory explain that mitochondria and plastids arose from bacteria through engulfing by larger cells because mitochondria and plastids contain different DNA than cell nuclei.

Mitochondria were acquired before than plastids because mitochondria is present in majority of eukaryotic cell and some cell have plastids with mitochondria.This explain that after the endosymbiosis of mitochondria some cells did endosymbiosis with photosynthetic bacteria to acquire plastid.

NeX [460]3 years ago
3 0

Answer:

The fact that most  Eukaryotes  possess Mitochondrial despite  possession of plasmid, is an indication that  some eukaryotes were able to engulf some  photosynthetic bacteria,(endosymbiosis) after mitochondria endosymbiosis,This true because some early  Eukaryotes possesses  either the mitochondria, or its modified version or plastids.

Explanation:

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Answer:

asexual reproduction is produced without intercorse while sexual reproducttion is with intercorse

Explanation:

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2 years ago
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Determine whether each example represents continental drift or sea floor spreading.
laila [671]

Answer:

Sea floor spreading-> <u><em>Oceanic ridge and Magma pushing two plates apart</em></u>

Continental drift-> <u><em>Concept of pangaea and Oceanic plates sliding under continental crust</em></u>

Explanation:

Due to the divergent plate movement, the magma come out to the surface, forming the mid oceanic ridge and this separation of plates on the sea floor is known as the sea floor spreading. The magma here pushes the two plates to move apart because of the convection current that generates in the mantle. One example of mid oceanic ridge is the Mid-Atlantic Ridge.

  Continental drift refers to the slow and gradual movement of the lithospheric plates over the viscous asthenosphere layer. This motion of continents takes place because of the plate tectonic movement. Due to this plate motion, the denser plate gets subducts beneath the less denser plates. For example, the oceanic crust when collides with a continental crust, it gets subducted because of its higher density. The great supercontinent "pangaea" also formed and separated due to this plate motion.

4 0
2 years ago
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True or False: One way that we show chronological order and the relationship of events to each other is through timelines.
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Paul [167]

Answer:

A - Stigma

B - Anther

C - Filament

D -  Style

E - Ovary

F - Petal

Explanation:

The above are the correct answers of the image drawn in the attachment.

These are parts of a flower.

A - Stigma: It is the head of the pistil. It contains a sticky substance that catches pollen grains from other pollinators.

B - Anther: This is the head of the stamen. It produces pollen grain.

C - Filament: It is a long slender part of the flower. It attaches the anther to the flower.

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E - Ovary: It holds the ovule. Found at the base of the pistil.

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