Lynn Margulis
Hope this Helps
B) rejection response
C) autoimmune response
D) immunodeficiency response
Answer : The correct answer for the blank is- C) autoimmune response.
When the immune system of the body fails to recognize "self" that is its own body tissue/own antigens, it produces antibodies against it.
Due to this, the body's own cells, tissues, or organs are targeted, which cause inflammation and damage to the body. This condition develops as autoimmune response.
Example - Multiple sclerosis ( in which an insulation called myelin sheath around nerve fiber is destroyed that affects the transmission of nerve impulse, thereby causing problems related to muscular control).
b. two hundred million years ago.
c. two billion years ago.
d. two hundred billion years ago.
The hypothesis of continental drift is used to explain an event that happened
a. two million years ago.
b. two hundred million years ago.
c. two billion years ago.
d. two hundred billion years ago.
The answer is (b) Two hundred million years ago
Answer: b. two hundred million years ago.
Continental drift is a scientific theory was developed by Alfred Wegener (1880-1930). He was a German meteorologist, who proposed the hypothesis that continents were the part of huge landmass or supercontinent about 200 million years ago. These continents got separated or splitted from their parent continent and drifted to other locations. He named the parent or supercontinent as "Pangaea" (which means "all lands" in Greek) which began to break up.
Drug resistance exists among all individuals in a population.
Heritable variation does not exist among individuals in a population.
Environmental variation exists for traits among individuals in a population.
Answer:
Heritable variation exists for traits among individuals in a population.
Explanation:
According to Darwin's theory of evolution, natural selection is the main evolutionary mechanism. Darwin explains that organisms that have heritable traits that help them survive and reproduce, will be favorable by natural selection. Those favorable traits will enable organism to better adapt to their environment and to pass more genes on to the next generation (offspring).
Organisms adapt to their environment by changing their behavior, structural traits or physiology as a response to environmental change, so that they become well suited to it.