Which one of these exhibits gill slits at some stage of its development?

A. all echinoderms

B. all mollusks

C. all cnidarians

D. all chordates

In which phase of mitosis do the sister chromatids separate at their centromeres?

Describe polyploidy. When is this condition useful to researchers?

What is the nature-nurture debate?

A toy car moves 3 m with 3.5 J. How much force did the toy car apply?

Whitch three processes happen as a multicellular organism grows

The chief force pushing water and solutes out of the blood across the filtration membrane is A) the ionic electrochemical gradient B) protein-regulated diffusion C) glomerular hydrostatic pressure D) the size of the pores in the basement membrane of

From day 23 to 28 the progesterone levels are dropping. What effect will this eventually have on the endometrium?

When both muscles of this pair are contracted simultaneously, they flex the neck forward. When both muscles of this pair are contracted simultaneously, they flex the neck forward. a. platysma b. semispinalis c. sternocleidomastoid d. trapezius

At the beginning of cellular respiration, energy is stored in the bonds of blank molecules. At the end of cellular respiration, energy is stored in the bonds of blank molecules. for each one has the options of: ATP, glucose, or oxygen

What is the difference between frond and cone