<span>Biologist, Rachel Carson warned about the misuse of synthetic pesticides. This discovery was published in her book, Silent Spring, published in 1962. Her interest in the subject was sparked by a then unexplained phenomena of unusually high bird deaths.</span>
The nature of the pathogen is an intrinsic feature that is involved in shaping the effector cd4 T-cell response.
<h3>What are cd4 T-cells?</h3>
The cd4 T-cells are cells of the immune system involved in adaptive immune responses, which emerge by contact with the pathogen and involve the production of antibodies that target specific antigens.
In conclusion, The nature of the pathogen is an intrinsic feature that is involved in shaping the effector cd4 T-cell response.
Learn more about cd4 T-cells here:
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Answer:
Option B and C
Explanation:
When a population is said to be in Hardy Weinberg’s Equilibrium, it is assumed to obey the following assumptions –
a) There is random mating among the organism
b) The mating should not be selective and in order to achieve so the population size must be infinite
c) There should be no loss or gain of allele thereby assuring that there is no selection, mutation, migration etc.
d) Also there must be no crossing among organism belonging to different generation
With all such assumptions, the allele frequencies will remain either constant thereby producing infertile recessive homozygous species or fertile heterozyous species.
Hence, option B and C are correct
Answer:the sensor or receptor
Explanation: homeostasis is the process of the body to maintain a constant internal condition , regardless of changes in it's external environment.
Homeostatic usually involves a sensor/receptors on which detects changes or stimuli,A control center which process the stimuli and triggers the effector and An effector which changes the body according to the message recieved from the control center.
In an air conditioner,the thermometer is the sensor,which detects a change in the temperature of the room.this allows the air conditioner to control the temperature and keep it constant, regardless of the temperature outside.
Answer:
71% of earth os covered by water