How are seedless nonvascular plants and seedless vascular plants similar and different and the same

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Which accurately compares concave and convex lenses?

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant