Water is a limited natural resource, vital for the expansion and development of, not only our specie, but each individual living organism in the planet. Hence, in a community proper water management is a must in order to make sure that water be maintained and cared for -used wisely. In one research, it is estimated that by 2025 more places will feel water scarcity than decades ago.
Answer: b - Chondroblasts within the cartilage divide and secrete new matrix
Explanation: Chondroblasts are derived from two sources; mesenchymal cells within the center of chondrification and chondrogenic cells of the inner cellular layer of the perichondrium (coverings that lie over most cartilage).
At the chondrification centers, the cartilage forming cells (Chondroblasts) begin to secrete the components of extracellular matrix of cartilage. As the amount of matrix increases, the Chondroblasts become separated from each other and they are located in small cavity within the matrix called lacunae.
Concurrently, the cells differentiate into matured cartilage cells called chondrocytes.
Chloroplast and mitochondria. Because both organelles are roughly the same size and shape as bacteria, have their own double layer membrane, and mitochondria have dna, that they were engulfed by early cells and are now organelles.
Answer: this is called passive transport and it does not require energy.
Answer:
In case of these gram-negative bacteria, the outer membrane (made of lipid) is firmly bound to the cell wall (made of peptidoglycan). This structure is responsible for maintaining cell integrity against the turgor pressure faced from the outside. Since this outer layer is more permeable to substances moving across the membrane, the next layer - the inner membrane - also adds support to withstand turgor pressure. It will not let an osmolyte (such as sucrose) diffuse through it, thereby maintaining the osmotic pressure in the periplasmic space.
Hope that answers the question, have a great day!
