The phase diagram of a substance is shown below.  What phase change will the substance undergo when the pressure is decreased from 100 atm to 0.01 atm at a constant temperature of 250 K?

Parenchyma, collenchyma, and sclerenchyma are all types of cells derived from

Which of these characteristics does not promote outcrossing in flowering plants? 

What is the period of rapid cell division in which the embryo does not increase in overall size?

What structure is formed from both fetal and maternal tissue?

In which plant cell or tissue would the pressure component of water potential most often be negative?

In a frog embryo, gastrulation

Tracheids, vessel elements, and sclereids are similar in that they all

Angiosperm double fertilization is so-called because it features the formation of

In amphibian eggs, cells migrate to the interior of the embryo through the blastopore. In mammalian embryos with small amounts of yolk, this movement occurs at the