Quiz 4
1. Reproduction 2. Genetics 3. Thermo-regulation 4. Chemicals in organisms
Reproduction
Question 1 Sperm production occurs in a greater rate at 37oC. True False Question 2 The sperm tubules in testes produce sperm and male sex hormone. True False Question 3 Human beings carry out external fertilization. True False Question 4 Asexual reproduction involves one parent whereas sexual reproduction must involve two parents. True False Question 5 Fertilization in human occurs in uterus. True False Question 6 Ovulation usually takes place on the 9th day after the last day of menstruation. True False Question 7 Fruit provides nutrients for the seeds. True False Question 8 Importance of seed is to increase variation. True False Question 9 Importance of seed dispersal is to reduce overcrowding. True False Question 10 A wind pollinated flower usually possesses anther and stigma which are hanged outside of the corolla. True False Question 11 Germinating seeds can carry out anaerobic respiration. True False Question 12 The bud in the storage organs in vegetative propagation can develop shoots and roots. True False Question 13 Spores are usually unicellular but seeds are multicellular. True False Question 14 Pollen grains are male sex gametes. True False Question 15 Example of bulb and rhizome are onion and ginger respectively. True False Click here to play again
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Genetics
Question 1 When two tall plants are crossed, some offspring are dwarf but some plants are tall. The two parents plants must have the same genotype. True False Question 2 Blood group A is dominant over blood group O. Amy is blood group A but Peter is blood group O. Their children must be blood group A. True False Question 3 When a heterozygote plant is crossed with a recessive plant. There must be two types of genotypes in their offspring. True False Question 4 The phenotype of a heterozygote and that of a homozygote dominant must be the same. True False Question 5 If a character is controlled by a pair of alleles, and one is dominant over another. There must be two types of phenotypes and genotypes in the entire populations. True False Question 6 Hybrid refers to the heterozygote. True False Question 7 If we cross a pure homozygote dominant and a pure homozygote recessive, all the offspring must have the same genotypes. (Given that no mutation occurs.) True False Question 8 Both meiosis and mitosis can produce gametes. True False Question 9 If the parents are blue-eyed and brown-eyed, their children are all brown-eyed, brown-eyed is a dominant character. True False Question 10 If the parents are blue-eyed and brown-eyed, they have 4 children. All of them are brown-eyed, brown-eyed is a dominant character. True False Question 11 In heterozygote state, only dominant character express out to show the phenotype. True False Question 12 To test an individual whether it is a homozygote dominant or heterozygote, normally we will cross it with a recessive individual. True False Question 13 Mutation is a reversible change in the genetic materials. True False Question 14 The role of variation is to increase survival of species. True False Question 15 Tt crosses with Tt yields TT:Tt:tt in a ratio of 1:2:1. True False Click here to play again
Thermo-regulation
Question 1 Cold-blooded animals cannot regulate body temperature. True False Question 2 The epidermis of skin contains dead cells. True False Question 3 The melanin pigment protects our body by absorbing harmful ultraviolet light. True False Question 4 The sweat gland is a kind of exocrine gland. True False Question 5 There are urea, salts in the sweat. True False Question 6 Hair cells are dead. True False Question 7 Sebaceous glands secrete oil to keep skin waterproof. True False Question 8 Sweating can be regarded as both secretion and excretion. True False Question 9 When temperature rises, erector muscles contract. True False Question 10 In cold temperatures, vasoconstriction occurs. The capillaries in the skin constrict to reduce blood flows to the skin surface. True False Question 11 Subcutaneous fat is the fat beneath the dermis. True False Question 12 When hairs stand erect, it can trap more air on the surface of the skin. This can reduce heat loss by convection and conduction. True False Question 13 When outside temperature is higher than body temperature, evaporation is the only way of heat loss. True False Question 14 Adipose tissue, hairs, erector muscles are structures which can regulate body temperature when we enter a cold room. True False Question 15 In Hong Kong, when the surrounding temperature is 30 degrees Celcius, we feel hotter than when we are in USA because the rate of water evaporation is slower. True False Click here to play again
Chemicals in body
Question 1 All organisms must have one or more than one cells. True False Question 2 There are organic substances and inorganic substances in the body of organisms. True False Question 3 If a substance has carbon atoms, it is an organic substance. True False Question 4 Vitamins are organic. True False Question 5 We require iron metal, calcium metal in our diet. True False Question 6 There are only three kinds of atoms in carbohydrates. True False Question 7 The ratio of hydrogen and carbon in a carbohydrate is always 2 to 1. True False Question 8 Oils are fats. True False Question 9 The ratio of H to O in fats is that greater than 2 to 1. True False Question 10 The building block of proteins is glucose. True False Question 11 Glucose releases energy by respiration. True False Question 12 We store starch as the food storage form of carbohydrates. True False Question 13 Cow and sheep can digest cellulose. True False Question 14 We can find DNA inside nucleus. True False Question 15 The most abundant substances in our body is protein. True False Click here to play again
