Answer:b. Facilitated transport
Explanation:in the usual activities of the cell,it's cell membrane is responsible for the movement of substance in and out of the cell.
Such substances include nutrients,water, oxygen etc.
The plasma membrane select the substances that it allows into the cell thus it is said to be selectively permeable.
The plasma membrane of the cell has a phospholipid bilayer made up of cholesterol, proteins and glycoproteins.
The proteins on the membrane are useful for facilitated diffusion.
In this diffusion process,the proteins helps to carry large molecules across the cell membrane.such molecules includes glucose,amino acids etc.
In the process energy is not expended so it is a type of passive transport.
It allows different kinds of organisms to be easily identified based on their characteristics
Explanation:
Classification is defined as the grouping of organisms based on their similarities and dissimilarities. The main aim of classification is to simplify the study of vast range of animals that exist in nature.
The scientists use a standardized method in which they follow a set of rules while studying and assigning a taxonomic rank to a newly studied organism.
The taxonomic hierarchy includes the following taxon-Kingdom, phylum,class, order, family, genus, species.
Beginning from Kingdom the percentage of similarities among the members keep on increasing while we move towards species.
A taxonomical rank is assigned to an organism by studying the similarities of that organism with already existing members of that taxonomic group.
Since, few characters are already studied well while classifying the earlier members the study and classification of new organism becomes much simplified and easier.
Answer:
Energy is directly responsible for matter moving and changing inside a bears body.
