Folds in the plasma membrane of bacteria perform most of the same functions as the organelles of eukaryotic cells.
(a)-true
(b)-false

The correct answer will be-false

Explanation:

The folded structure of the plasma membrane was observed in the gram-positive bacteria which were called the mesosomes.

These mesosomes were earlier thought to be involved in the specific functions like cell division, chromosome replication, oxidative phosphorylation.

Later in the 1970s, the research showed that these invaginations of the plasma membrane were produced by the chemical fixation techniques to prepare samples for the electron microscopy and were treated as artefacts.

Thus, false is the correct answer.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added