<span>cell must divide. ....................................</span>
Answer and Explanation:
The Immune System. It comprises the white blood cells, lymphatic system, etc. The immune response is the production of antibodies in response to antigens present in pathogens and other foreign matter.
The leukocytes are formed in the bone marrow of long bones and lymph nodes. Their function is to protect the body from invasion of foreign material like bacteria and viruses( pathogens). They help fight against infections by engulfing and digesting pathogens and production of antibodies which are proteins that bind to pathogens. Their number increases greatly during infections.
Answer:
trophic level
Explanation:
The energy pyramid indicates how energy is transferred from one organism to the next on the food chain. There are four main levels, starting at the base with producers that take energy from the sun, and moving upward to primary, secondary and tertiary consumers. The pyramid of numbers represent the number of organism in each trophic level.
Answer: The complementary sequence will be TTAGCCT
Explanation: According to Watson and Crick base pairing rule, in DNA adenine pairs with thymine while c guanine pairs with cytosine.
DNA is a double-stranded helix in which the two strands are complementary and antiparallel to each other. Being complementary does not mean that the two strands of the DNA are the same in base sequence and composition, rather it means that where adenine is found in one strand of the DNA, thymine occurs in the other strand and wherever guanine occurs in one strand, cytosine is found in the other strand.
