B5 0.0 / 5 ? BiologyDNA and inheritanceCells, tissues and organsGCSEOCR Created by: izzyhannCreated on: 30-11-14 20:04 What is a group of specialised cells called? Tissue 1 of 40 What function does muscle cells do? They contract and relax to cause movement 2 of 40 What function does nerve cells do? They carry nerve impulses 3 of 40 Name same tissues Bone, cartilage and blood 4 of 40 What is a group of tissues called? Organ 5 of 40 Name some organs in humans Heart and brain 6 of 40 Name some organs in plants Roots, leaves and flowers 7 of 40 What does the xylem tissue do? Transports water and minerals 8 of 40 What does the phloem tissue do? Transports sugar 9 of 40 What is a zygote? A fertilised egg cell 10 of 40 What is the chemical that your genes are made of? DNA 11 of 40 What happens as the embryo grows? Some of the new cells become specialised and form tissues 12 of 40 After about two months, the main organs form and the developing baby is called? A fetus 13 of 40 What is a six-day embryo made of? About 50 cells 14 of 40 What happens at the 8 cell stage? Sometimes it splits into two 15 of 40 What are identical twins? They are clones of each other 16 of 40 What are some of the cells like in an early embryo? Identical and unspecialised 17 of 40 What are embryonic stem cells? Unspecialised cells 18 of 40 What do living things have to do in order to grow? Their cells must divide to make new cells 19 of 40 What are the dividing cells in plants called? Meristem cells 20 of 40 Where do plants make new cells? At the tips of both shoots and roots 21 of 40 Are plant meristem cells specialised? No they are unspecialised 22 of 40 Can plants regrow whole organs such as leaves? Yes 23 of 40 What are stem cells? Cells which divide, grow and develop into specialised cells that the body needs 24 of 40 What are cuttings? Cuttings are shoots or leaves cut from a plant 25 of 40 What plant hormone does rooting powder contain? Auxins 26 of 40 What does auxins do? They cause the new cells produced by the base of the shoot meristem to develop into roots 27 of 40 What is phototropism? The bending of growing plant shoots towards the light 28 of 40 What does phototropism do? Increases plant's chances of survival 29 of 40 What two things did Charles Darwin discover? Young shoots grow towards the light and remained straight when he covered their tips 30 of 40 What does higher concentrations of auxins cause? It causes shoot cells to expand 31 of 40 Name one specialised cell that loses its nuclei when they finish growing Red blood cell 32 of 40 What is the job of red blood cells? To carry oxygen attached to the haemoglobin molecules 33 of 40 What is a chromosome? A chromosome is a long molecule of DNA wound around a protein framework 34 of 40 What does each gene code for? A protein 35 of 40 How many pairs of chromosomes is in a human's nuclei? 23 pairs of chromosomes 36 of 40 What does DNA's unique structure allow it to do? Make exact copies of itself and provide instructions so that the cell can make the right proteins 37 of 40 How many genes are there in a chromosome? Thousands of genes 38 of 40 Name some organelles Ribosomes and Mitochondria 39 of 40 What is mitosis? Cell division that makes two identical cells 40 of 40
Comments
No comments have yet been made