Multicellular organisms need many different types of cells<span> to carry out the same life processes. Each of these special types of </span>cells<span> has a different structure that helps it perform a specific function. ... </span>Cell differentiation<span> is the process by which </span>cells<span>become specialized in order to perform different functions.</span>
Answer:
According to bottom-up and top-down control models of community organization, which of the following expressions would imply that an increase in the size of a carnivore (C) population would negatively impact on its prey (P) population, but not vice versa? D) P ← C
Explanation:
A community is defined by all the organisms living in the same area. In nature, theses communities are organized in a bottom-up or a top-down model. Bottom-up control is importante because of the association between many species and the supply of resources from the environment. The sources of top-down control is made of consumers and predators.
Answer:
Im pretty sure the answer is "B"
Explanation:
Convection in the mantle and pressure of magma on the edge of the plate
Answer:
Distinctive characteristics of the cell membrane in the <em>Pseudomonas</em> genus:
- low outer membrane permeability
- protein channels for the uptake of nutrients
- porin proteins with cell adhesion and signaling functions
Explanation:
The plasma membrane is a lipid bilayer that separates the cytoplasm of the prokaryotic cell from the external environment. The cell membrane is selectively permeable in order to regulate the transport of substances (nutrients and cell waste products). <em>Pseudomonas</em> is a genus of Gram-negative bacteria that have a thin peptidoglycan layer and an outer membrane. In <em>Pseudomonas</em> species, the cell membrane contains porin proteins involved in the uptake of nutrients, such as, for example, OprB, OprB2 (glucose), OprG (phosphate) and OprH (pyrophosphate). Moreover, the cell membrane of these bacteria has low outer permeability, which confers a high resistance to antibiotics.
