Ib Biology Hl : Definition

chromosome – threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next
unicellular – describes an organism that consists of a single cell
semi-permeable – A membrane that allows only certain things to pass through
ATP – adenosine triphosphate – transfers energy from the breakdown of food molecules to cell processes
Risks – The potential negative consequences of a proposed action. The chance that negative consequences will result.
sex linkage – when the gene controlling the characteristic is located on the sex chromosome and so we associate the characteristic with gender.
The five regions of the vertebral column, from superior to inferior are:
Ascariasis spp – Ascaris lumbricoides, round worm (phylium nematoda)
Ground tissue – the tissue system that makes up the bulk of the plant and functions in photosynthesis, storage, regeneration, support, and protection
Nuclear Envelope – The double-membrane system surrounding the nucleus of eukaryotic cells; the outer membrane is typically continuous with the endoplasmic reticulum.
Abiotic – Refers to physical factors, such as temperature and light intensity, that affect ecosystems.
The five regiоns оf the vertebrаl cоlumn, from superior to inferior аre:
petal – A modified leaf of a flowering plant. Petals are the often colorful parts of a flower that advertise it to pollinators.
carrier – a heterozygous organism that is normal for a trait but has a recessive gene for an undesirable trait and can transmit that gene to offspring
Endoplasmic reticulum – Highly folded membrane system in eukaryotic cells that is the site for ribosome attachment.
optic lobe – The section of the brain involved in the perception of visual information.

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