CIE A Level Biology復習筆記16.2.1 Key Terms in Genetics
Key Terms in Genetics Genes & alleles The DNA contained within chromosomes is essential for cell survival Every?chromosome?consists of a long DNA molecule which?codes for several different prot...
CIE A Level Biology復習筆記16.1.5 Meiosis: Sources of Genetic Variation
Meiosis: Sources of Genetic Variation Having?genetically different offspring?can be?advantageous?for natural selection Meiosis?has several mechanisms that?increase the genetic diversity of gametes?...
CIE A Level Biology復習筆記16.1.4 Identifying the Stages of Meiosis
Identifying the Stages of Meiosis Cells undergoing?meiosis?can be observed and photographed using specialised microscopes The different stages of meiosis have distinctive characteristics meaning th...
CIE A Level Biology復習筆記16.1.3 Meiosis in Animal & Plant Cells
Meiosis in Animal & Plant Cells Meiosis is a form of?nuclear division?that results in the?production of?haploid?cells?from diploid cells It produces?gametes?in plants and animals that are used ...
CIE A Level Biology復習筆記16.1.2 Homologous Chromosomes
Homologous Chromosomes In?diploid?cells there are two complete sets of chromosomes in the nucleus Chromosomes?have a characteristic shape They have a?fixed length The?position of the centromere?is ...
CIE A Level Biology復習筆記16.1.1 Haploidy & Diploidy
Haploid & Diploid Cells A diploid cell is a cell that contains?two complete sets of chromosomes (2n) These chromosomes contain the DNA necessary for protein synthesis and cell function Nearly a...
CIE A Level Biology復習筆記15.2.3 The Role of Gibberellin in Germination of Barley
The Role of Gibberellin in Germination of Barley Gibberellins?are a type of plant growth regulator involved in controlling?seed germination?and?stem elongation When a barley seed is shed from the p...
CIE A Level Biology復習筆記15.2.2 The Role of Auxin in Elongation Growth
The Role of Auxin in Elongation Growth Plant?hormones?(also known as?plant growth regulators) are responsible for most communication within plants Auxins?are a type of plant growth regulator that i...
CIE A Level Biology復習筆記15.2.1 Electrical Communication in the Venus Flytrap
Electrical Communication in the Venus Flytrap Plants possess?communication systems?that enable them to coordinate the different parts of their bodies The Venus flytrap is a?carnivorous plant?that g...
