Blood group B individuals have the B antigen on the surface of their RBCs, and blood serum containing IgM antibodies against the A antigen. Therefore, a group B individual can receive blood only from individuals of groups B or O (with B being preferable), and can donate blood to individuals with type B or AB.
Language development usually signals the development of memory and the understanding required to get time out. . Dr. Sears recommends starting time out at 18 months and expects that toddlers will understand it by 2. . For toddlers many developmental experts recommend natural consequences rather than or along with timeouts.
Many combine words in short phrases and sentences. Kids this age usually can follow two-step instructions, such as pick up the ball and bring it to Daddy.. By age 3, a toddler's vocabulary usually is 200 or more words, and many kids can string together three- or four-word sentences.