Answer:
The correct answer is A. ribosomes
Explanation:
Eukaryotic cell contains both membranous and non-membranous organelles. The membranous organelles are the nucleus, endoplasmic reticulum, Golgi apparatus, chloroplast(plants), mitochondria, lysosomes, etc.
Ribosomes, centrosomes are the non-membranous structures. Ribosomes are found in both eukaryotic and prokaryotic cells. In prokaryotes 70s ribosomes are present and in eukaryotes 80s ribosomes are present. Prokaryotes do not have a membrane-bound nucleus and organelles.
Ribosomes helps in protein synthesis in both prokaryotes and eukaryotes. Therefore the right answer is the ribosome.
Geologists call individual layers of sedimentary rocks beds, whereas everal of them together are called strata.
Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. The sediment is often formed when weathering and erosion break down a rock into loose material in a source area. Strata are layers of rocks that are laid down as sediment, often in the sea, and are slowly changed by pressure, heat and chemical actions into rocks.
Earth layers crust
lithomsphere
asthenoshere
mantle
core
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Answer: <u>Activators </u> can switch on enzyme activity, while <u>inhibitors </u>can switch off or reduce enzyme activity.
Enzymes are biomolecules that catalyzes a reaction. The enzymes can either speed up or slows down a reaction. Activators are compounds, molecules or elements that attach to the enzyme and promotes its activity. Inhibitors are factors which prevent the activity of the enzyme. Both activators and inhibitors are necessary for cellular metabolisms taking place in a living organism.
Answer/Explanation:
Stationary organisms generally do not move by self locomotion.They could move through the actions of external forces such as moving water but cannot move alone.
Most stationary organisms (also called sessile organisms) have a motile phase in their life cycle. This allows them do disperse across longer distances. This is important for the survival of the species, as it means they can exploit a larger food supply and other resources.
