A child has type O blood. Which of the following couples could be the child's parents?

Couple 1: Mother's Type -A, Father's Type -B
Couple 2: Mother's Type -O, Father's Type -A
Couple 3: Mother's Type -AB, Father's Type -O
Couple 4: Mother's Type -B, Father's Type -AB

A.
couple 1, 2, 3, or 4

B.
couple 3 or 4 only

C.
couple 1 or 2 only

D.
couple 2, 3, or 4 only

brown

explanation:

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.