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Novosadov [1.4K]
3 years ago
14

What provides an explanation for the presence of mitochondria and chloroplasts in present day cells?

Biology
1 answer:
Sav [38]3 years ago
3 0
The general theory is that mitochondria and chloroplasts began initially as separate cells that were "eaten" by larger cells, but not digested and simply passed on due to their advantages.<span />
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Mention four ways to keep your environment clean​
leva [86]

Answer:

Recycle, Drive your car less, Save water, and Save Electricity

Explanation:

8 0
3 years ago
____ intelligence is defined as involving the skills and knowledge necessary for adapting to one’s physical and social environme
n200080 [17]
The answer is Practical Intelligence. Practical intelligence is the consequence of an exploratory hands-on working style that prompts particular learning. Practical intelligence is the capacity that people use to locate the best fit amongst themselves and the requests of nature.
6 0
3 years ago
Prokaryotic bacteria are surrounded by a ____________ that contains the ____________ to regulate the entry and exit of materials
lukranit [14]

Prokaryotic bacteria are surrounded by a cell membrane that contains the transport proteins to regulate the entry and exit of materials through the cell, the cell wall to help maintain cell shape and structure, and the capsule, which aids against drying out and protects bacteria from a host's immune system.

<h3><u>Explanation:</u></h3>

Bacteria are the prokaryotic organisms that are found in every part of Earth. These organisms do have an interesting ultrastructure. The coverings of the bacteria are three in layer. They are

A. The outer capsule.

B. The middle cell wall.

C. The inner cell membrane.

The capsule is the outermost covering of bacteria that is formed of different slimy materials. These materials contains hygroscopic substances which can absorb water from the surroundings even when the water concentration in outside is very very low. This layer of protection outside bacteria help them to protect themselves against drying out at dry conditions.

The middle cell wall is formed of polymers of N acetyl glucosamine and N acetyl muramic acid. This layer is chitin in nature and is strong enough to maintain the shape and size of bacteria irrespective of outer conditions.

The innermost layer of bacteria is cell membrane which is formed of proteins and lipids bilayer and this cell membrane contains different transport for proteins which help in transport of different substances like water and nutrients inside the cell by means of active transport or passive diffusion.

6 0
3 years ago
Read 2 more answers
A picture says it!
Verizon [17]

Answer:

A

Explanation:njkdnvkjxxnalvsdnfdhfjdsshhudshuhulffdhfgjfdjgfdjhdfshjdfshjfsjhfdshjfdshjdfhjfdshjfshjskfhk,sdciusnjd du dhhd dkskd dju ehfjhjcj is cool and amazing and did not answer dis question so someone else has tp i judt used ita to prctis kdkjdjlkjkxmvlkcd safdop

8 0
3 years ago
What is the major function of a leaf
ANEK [815]

Answer:

Photosynthesis

Explanation:

The leaf (from Latin fŏlĭum, fŏlĭi) is the vegetative and generally flattened organ of vascular plants, specialized mainly to perform photosynthesis. The morphology and anatomy of stems and leaves are closely related and, together, both organs constitute the stem of the plant.

Typical leaves - also called nomophiles - are not the only ones that develop during the life cycle of a plant. From the germination, different types of leaves follow each other - coiled, primordial leaves, prophilic, bracts and antophiles in flowers - with very different forms and functions.

A nomophile usually consists of a flattened sheet, a short stem - the petiole - that joins the sheet to the stem and, at its base, a pair of appendages - the stipules. The presence or absence of these elements and the extreme diversity of forms of each of them has generated a rich vocabulary to categorize the multiplicity of types of leaves presented by vascular plants, whose description is called foliar morphology.

5 0
3 years ago
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