According to the endosymbiotic theory, which organelles were believed to be once simple prokaryotic cells? A. Mitochondria and Endoplasmic Reticulum
B. Endoplasmic Reticulum and Chloroplast
C. Endoplasmic Reticulum and Ribosomes
D. Mitochondria and Chloroplast

Choose the molecule that is described by each phrase. energy used during long activities:

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different