Perihelion marks the begging of summer when the earth is closest to the sun.
active immunity is the immunity which get in hospital
Only lymphocytes possessing receptors that can bind with the antigens on an invading pathogen are involved in the immune response against it.
<h3>Are receptors and antibodies the same?</h3>
B cell receptor refers to an immunoglobulin molecule which serves as a type of trans membrane protein on the surface of B cells while an antibody refers to a blood protein that the B cells produce in response to and counteracting a specific antigen.
Thus, this is the main difference between B cell receptor and antibody.
<h3>What is the purpose of the antigen receptor?</h3>
Its function is as a receptor that recognizes and binds antigen by the V regions exposed on the surface of the cell, thus transmitting a signal that causes B-cell activation leading to clonal expansion and specific antibody production.
Learn more about receptors and antigens here:
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brainly.com/question/25510938</h3><h3 /><h3>#SPJ4</h3>
Heat given off
Color change
Expanding
smell change
Light change or given off
Texture change
Sound change or given off
shape change
Taste change
Temp. Change
Gas given off
Answer:
Nuclear membrane/envelope
Explanation:
Mitosis, as one type of cellular division, occurs in five stages; Prophase, prometaphase, Metaphase, Anaphase and Telophase. After the cell must have prepared itself to enter this division process by enlarging and forming duplicate of its genetic material and organnelles in the Interphase stage, it starts Prophase.
In the Prophase, condensation of chromosomes occur and centrosomes move towards opposite poles to produce spindle microtubules that will later pull the chromosomes apart. In the prometaphase stage, the envelope that bounds the DNA in the nucleus is degraded in order for the growing microtubules to have direct access of attachment to the chromosomes.