How are layers that form ice similar to tree rings

Which animal group is the largest and contains more species from all the other living groups combined? is it mammals or

Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?