large animals

second phase of female gametophyte development, during which the surviving haploid megaspore undergoes mitosis to produce an eight-nucleate, seven-cell female gametophyte, also known as the megagametophyte or embryo sac

pressure units that measure water potential

larger leaves with a pattern of branching veins

tissue found in the ovary that gives rise to the female gamete or egg

female spore

megaspore mother cell; larger spore that germinates into a female gametophyte in a heterosporous plant

first phase of female gametophyte development, during which a single cell in the diploid megasporangium undergoes meiosis to produce four megaspores, only one of which survives

bract (a type of modified leaf) on the central axis of a female gametophyte

a nuclear division process that results in four haploid cells

first round of meiotic cell division; referred to as reduction division because the ploidy level is reduced from diploid to haploid

second round of meiotic cell division following meiosis I; sister chromatids are separated into individual chromosomes, and the result is four unique haploid cells

(also, tactile corpuscle) encapsulated, rapidly-adapting mechanoreceptor in the skin that responds to light touch

difference in electrical potential between the inside and outside of a cell

antigen-specific B or T lymphocyte that does not differentiate into effector cells during the primary immune response but that can immediately become an effector cell upon reexposure to the same pathogen