Which of the following statements is false? T-helper cells integrate the actions of the humoral and cellular immune responses. T
he humoral immune response is directed at antigens that have become established within cells. The humoral and cellular immune responses operate simultaneously. Cytotoxic T cells perform critical functions in the cellular immune response, and B cells produce antibodies in the humoral immune response. The humoral immune response produces antibodies, and the cellular immune response can destroy infected cells.
if we`ll not classify living beings then it`ll become difficult to study all of beings one by one. In order to make their study easier biologists have classified all living beings into five major groups.
Carbon dioxide is a greenhouse gas and traps heat in the atmosphere. Without it and other greenhouse gases, Earth would be a frozen world. But humans have burned so much fuel that there is about 30% more carbon dioxide in the air today than there was about 150 years ago, and Earth is becoming a warmer place.
