Eilidh Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
What are the growth points in plants called | Meristems |
Where are meristems located | Shoot tip, root tip and lateral (cambium) |
How are annual rings formed | Spring cells big, Summer and Autumn cells smaller and so appear as a line |
What species have extensive regenerative abilities | Angiosperms |
When are the two growth spurts in humans | Infant and puberty |
Explain the growth curve of a locust | Insects possess a hard inelastic outer skin called an exoskeleton which prevents continuous increase in body size. This skin must be periodically shed to allow growth to occur. |
What does the regulator gene produce | Repressor molecule |
What does the repressor molecule normally bind to | Operator gene |
What does the operator gene control | The activity of the Structural gene |
What is the inducer molecule and what does it bind to? | Inducer = lactose and it binds to the repressor molecule |
What advantage does E.coli get from the Lac Operon | Resources are not wasted |
How do genes control characteristics | Through the production of PROTEINS |
What must PKU sufferers avoid in their diet | Phenylalanine |
Why does this condition only affect children after birth | When in the womb XS phenylalanine diffuses into the mothers blood. |
What is cell differentiation | When cells become specialised for certain functions |
How is differentiation brought about | By different genes being switched on (remember all cells have the same genes) |
Name the pituitary hormone that promotes growth | Growth Hormone |
Name the pituitary hormone that promotes the production of Thyroxine | Thyroid Stimulating Hormone (TSH) |
What is the role of Thyroxine | Thyroxine promotes metabolism (energy consumption) of cells |
What effect does IAA have on cells? | Promotes cell division AND cell elongation |
What protein do Albinos fail to produce | Melanin |
How does IAA travel short distances in plants | Diffusion |
How does IAA travel long distances in plants | In Phloem |
What condition arises from under production of GH | Dwarfism |
What condition arises from over production of GH | Giantism |
What condition arises from over production of GH after growth has finished | Acromegaly |
Name 4 events that occur at the organ level through the action of IAA | Apical dominance, Leaf Abscission, Fruit formation, Phototropism. |
Name a commercial use of IAA | Weedkiller or producing seedless fruit or rooting powders |
Name 3 roles of GA | Reversing dwarfism, seed dormancy and bud dormacy |
What seed structure produces GA | Embryo |
What seed structure produces Amylase | Aleurone layer |
What is Amylase's Substrate and Product | Starch to maltose |
What part of the plant does GA work on to reverse dwarfism | internodes |
What do cells need Nitrogen for? | Production of amino acids, proteins and nucleic acids |
What do cells need Phosphorous for | ATP production and Nucleic acid production |
What do cells nedd potassium for | Transport of materials across membranes |
What do plant cells need magnesium for | Production of Chlorophyll |
What do animal cells need Iron for | The production of Haemoglobin and Cytochrome |
What do animal cells need Calcium for | Strong bones and teeth, clotting of blood and muscle contraction. |
What are symptoms of Nitrogen deficiency in plants | Reduced leaf growth, Yellow leaves, Red leaf bases and Long Roots |
What are symptoms of Phosphorous deficiency in plants | Reduced leaf growth, Red leaf bases |
What are symptoms of Potassium deficiency in plants | Reduced leaf growth |
What are symptoms of Magnesium deficiency in plants | Reduced leaf growth, Yellow leaves |
What effect does Lead have on enzymes | Inhibits them (Catachol oxidase) |
Why is Vitamin D important in the diet | Needed to absorb Calcium |
What condition is associated with Vitamin D deficiency | Rickets |
What drug causes limb malformation | Thalidomide |
What effect does alcohol have on babies development | Reduced growth and mental function |
What effect does nicotine have on babies development | Reduced growth and mental function |
What effect does LACK of light have on stem growth | Long and skinny (etiolated) |
What gland produces ADH | Pituitary gland |
What gland produces Thyroxine | Thyroid gland |
What gland produces Glucagon | Pancreas |
What gland produces Insulin | Pancreas |
What gland produces Adrenaline | Adrenal gland |
Where does ADH have its effect | Collecting duct |
What effect does ADH have on the collecting duct | Increases its permeability to water (more water leaks back into the body from urine) |
What effect does drinking water have on ADH production | Reduces its production |
Define negative feedback | A corrective mechanism where the response is in the opposite direction to the change detected. |
What is glucose stored as in animals | Glycogen |
What hormone promotes the storage of glucose in the liver | Insulin |
What hormone promotes the release of glucose from the liver | Glucagon |
What effect does adrenalin have on blood sugar | Same as Glucagon |
Where is temperature monitored in the body | Hypothalamus |
What effect does cold have on skin blood arterioles | Vasoconstrict |
When do skin blood arterioles vasodilate | When too hot |
What is an endotherm | An organism that generates its own hreat through metabolism |
Density-dependent factors are... | Disease, food availability, Parasitism, Predation |
What is the carrying capacity? | The maximum number og organisms that an area can support |
What factors regulate optimum population size | Both density-dependent and independent factors |
What is the relationshipbetween predaotor and prey population sizes? | 1. Predator population is always smaller than prey. 2. Any change in the prey poulation size is slightly later copied by the predator population. |
What are the 4 reasons for monitoring wild populations | 1. Management of food species and raw materials, 2. Control pest Species, 3. Assessment of pollution using indicator species, 4. Protection & Conservation of endangered species |
What effect does succession have on Biodiversity | Increases it |
What effect does succession have on Biomass | Increases it |
What effect does Succession have on Food web complexity | increases it |
Give an example of a pioneer community | Lichens |
What is the last and biggest organism in the process of succession called | The climax community |
What causes PKU | A gene mutation |
Created by:
nscobie
Popular Biology sets