IB DP Biology: HL复习笔记10.1.3 Meiosis I
Meiosis I Homologous chromosomes separate in meiosis I Prophase I DNA has already replicated and condenses and becomes visible as chromosomes Each chromosome consists of two sister chromatids joine...
IB DP Biology: HL复习笔记10.1.2 Crossing Over
Crossing Over Crossing over is the exchange of DNA material between non-sister homologous chromatids Meiosis has several mechanisms that increase the genetic diversity of gametes produced Both cros...
IB DP Biology: HL复习笔记10.1.1 The Process of Meiosis
Replication of Chromosomes Like mitosis, meiosis is preceded by DNA replication Like most other eukaryotic cells, gamete-producing cells perform a cell cycle Gamete-producing cells are found in the...
IB DP Biology: HL复习笔记9.4.4 Skills: Investigating Factors Affecting Germination
Experiments Investigating Factors Affecting Germination Seeds remain dormant long enough to allow seed dispersal or until conditions are favourable During dormancy the seed is unable to germinate a...
IB DP Biology: HL复习笔记9.4.3 Skills: Drawing Plant Structures
Drawing the Internal Structure of Seeds A seed consists of several parts which can be shown in a labelled diagram Testa The seed coat Cotyledon or cotyledons The leaf or leaves of the embryo which ...
IB DP Biology: HL复习笔记9.4.2 Plant Reproduction
Mutualism Between Flowers & Pollinators Sexual reproduction in plants requires the transfer of pollen between flowers Methods of pollen transfer can include: Wind Animals Water Most flowering p...
IB DP Biology: HL复习笔记9.4.1 Flowering
Flowering & Gene Expression The life cycle of a flowering plant involves The vegetative phase The part of the life cycle during which plant growth takes places A plant in the vegetative phase c...
IB DP Biology: HL复习笔记9.3.3 Micropropagation
Micropropagation of Plants The nature of plant growth means that plants can be grown by a process known as micropropagation Micropropagation is a form of tissue culture in which plant cells are cul...
IB DP Biology: HL复习笔记9.3.2 Plant Hormones
Plant Hormones & Shoot Growth Plant hormones are responsible for most communication within plants Plant hormones are not the same as hormones in animals but they are chemical messengers so the ...
