Which statement(s) below accurately characterizes the evolutionary relationship between these species' limbs?
(Und
HU
The limbs are all homologous and support evidence of a common ancestor.
The limbs are homologous between the human and the bat, but vestigial in the
whale.
The limbs homologous between the human and the bird, but analogous in the
whale
ODNA sequence comparisons is the only way to determine if the limbs are
vestigial

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen