2. What is it called when certain species have evolved such intimate symbiotic relationships that individuals of elther species cannot survive without one another? facultative
mutualistic
parasitic
obligate​

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

Ry was studying two populations of the same species of lizards. one population lived on an island and the other lived on the mainland. both populations were affected by a hurricane that hit the island and the mainland with equal force. a year later, henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. which best describes a conclusion he might have reached? gene flow greatly affects small populations, but large populations can recover. genetic drift greatly affects small populations, but large populations can recover. gene flow greatly affects large populations, but small populations can recover. genetic drift greatly affects large populations, but small populations can recover.

What is the next step in muscle contraction after the actin changes shape? (apex)