When that situation happens then it can stimulate a cytotoxic T cell. This types of cells are the ones directly responsible for cellular immunity. Cytotoxic T cells can attack target cells by secreting a cytokine that triggers apoptosis which is <span>the death of cells which occurs as a normal and controlled part of an organism's growth or development.</span>
Answer:
Hemagglutinin is an envelope viral protein used to attach to host cells and gain entry via endocytosis
<h2>
2nd statement is true.</h2>
Explanation:
Chromosomes are made up of genes and a gene is made up of two copies of alleles. If an organism has two different types of alleles on its chromosomes then it's a hybrid organism else we call it a pure organism/trait.
- Gene could be dominant or recessive.
- A phenotype is the expression of a trait.
- As 'tall' gene is considered to be dominant so so pea plant with even a single copy of 'tall' gene will have a tall phenotype.
Answer:
The correct answer is option b. "It is maintained through beliefs that are widely shared in a society".
Explanation:
Social stratification is a people's differentiation according to its socioeconomic strata, directly affected by its wealth and social status. One of the principles of social stratification is that it is maintained through beliefs that are widely shared in a society. The existence of the different strata is maintained by people's believing in them, as people is rise with the idea of its existence and this idea is passed from generation to generation.
