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murzikaleks [220]
2 years ago
11

Cell membranes are said to be selectively permeable. Which statement best explains what selectively

Biology
2 answers:
strojnjashka [21]2 years ago
6 0
In school I learned 2 as the correct answer. The cell membrane chooses which substances to allow in and out of cell - is what my teacher's definition was. 
Ymorist [56]2 years ago
6 0

The correct answer is option 2, that is, the cell membrane lets certain substances enter the cell and keeps certain substances out of the cell.

All the cells are surrounded by a cell membrane. The cells membrane is selectively permeable, that is, it allows only some of the ions or molecules to pass through them by assistance of active or passive transport. For example, the molecules of water can passes passively through small pores on the membrane.  


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Mitochondria and chloroplasts
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Answer:

C. prokaryotic cells

Definitions

The Mitochondrion is an organelle in the cytoplasm of cells that functions in energy production.

Chloroplast is usually defined as a plastic containing chlorophyll.

Chlorophyll is the green coloring matter of leaves and plants, essential to the production in a bluish-black form, C55H72MgN405 (chlorophyll a), and a dark-green form, C55H70MgN4O6 (chlorophyll b).  

A root cell is one of the maestro cells in the human organic structure that has possible ability of turning into any of the more than the organic structure's 200 cell types.  

Prokaryotes is any cellular organism that has no nuclear membrane, no organelles in the cytoplasm except ribosomes, and has its genetic material in the form of single continuous strands forming coils or loops, characteristic of all organisms in the kingdom Monera, as the bacteria and blue-green algae.

<h2>What are the similarities and differences between prokaryotes, mitochondria, and chloroplasts?</h2>

Both mitochondria and heterotrophic prokaryotes, as well as chloroplasts and autotrophic prokaryotes, have a genetic structure (DNA with a circular double helix shape and the genes themselves), as well as comparable ribosome types. In reality, the endosymbiotic idea is based on these parallels.

5 0
2 years ago
If the producers in this aquatic food chain produce 50,000kcal of energy; how much energy would the Perch have?
Snezhnost [94]

Answer:

The 10% Energy Rule in a Food Chain

4 0
3 years ago
Read 2 more answers
Which part of an individual villus forms part of the lymphatic system and absorbs fats from the lumen of the small intestine?
Lostsunrise [7]
I believe the answer is the lacteals. 
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hichkok12 [17]
To inhibit cell division, such as those meant to treat cancer. 
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3 years ago
Which organisms would be the prey for the hawk?
earnstyle [38]
I would saw A it seems most likely for a hawks diet
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3 years ago
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