Through the 1973 endangered species act, u. s. species have been listed as endangered or threatened with recovery plans approved or implemented for species.

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing