5505803
| Pregunta | Respuesta |
| How do you classify organisms into groups? | We use different characteristics of organisms |
| What is the largest group of classification called? | Kingdom |
| Animals | No cell walls, multicellular (many cells), feed on other organisms |
| Plants | Cell walls made of cellulose, multicellular, make their own food |
| Fungi | Cell walls contain chitin, mostly multicellular, lives on dead organisms |
| Protoctists | Mostly unicellular (made of one cell) |
| Prokaryotes | Cells have no nucleus, unicelluar |
| Flowering plants | Roots, xylem tissues, flowers, larges flat leaves. Do not have cones. |
| Conifers | Roots, xylem tissues, cones, needle-shaped leaves. Do not have flowers. |
| Ferns | Roots, xylem tissues. Do not have flowers or cones |
| Mosses | Thin leaves that lose water. Do not have roots or xylem tissues. |
| The classification order | Kingdom, Phylum, Class, Order, Family, Genus, Species |
| Why is it useful to use the scientific name of a species? | The name can show the genus and the species. It can also be used by that name with scientists around the world who speak different languages. |
| Biodiversity | Habitats containing many different species have greater biodiversity. |
| Extinct | When an organism dies out completely |
| Sexual reproduction | It occurs when tow organisms breed and produce new organisms. Members of the same species can reproduce sexually to produce offspring that can also reproduce sexually |
| Hybrid | Members of two different species cannot usually reproduce, but if they do, the offspring are called hybrids. Hybrids cannot reproduce sexually; they are not fertile. |
| Inherited variation | Sexual reproduction produces offspring that do not look identical to their parents; they have some characteristics from one parent and some from the other. These characteristics are inherited and so variation in these characteristics is called inherited variation. |
| What happens in sexual reproduction? | In sexual reproduction, the parents produce sex cells or gametes. A male gamete and a female gamete join together to form a zygote.The gametes carry the instructions for making a new organism, but each and every gamete made by a patent contains slightly different instructions for |
| Why does the offspring not look identical to their sibling? | The gametes carry the instructions for making a new organism, but each and every gamete made by a parent contains slightly different instructions for characteristics. This means that different offspring with the same parents will vary, and not look identical |
| Asexual reproduction | This type of reproduction does not need gametes. Instead, part of the parent plant forms a new plant. this means that the offspring will be identical to the parent |
| Name 3 types of asexual reproduction | Runners, tubers, take a cutting |
| Pollen grains | Each pollen grain contains a male gamete. Pollen grains ripen inside an anthers, which then split open. The grains are carried away and transferred to the stigmas |
| Pollination | The pollen grains are carried away and transferred to the stigmas of other flowers |
| Name 4 types of ways pollination can be carried out | Animals, wind, water, explosion |
| What properties must plants with animal pollination have? | Flowers with petals, scent, colour, nectar |
| Cross pollination | When pollen is transferred from one plant to a different plant of the same species |
| Self pollination | When pollen is transferred from a flower on a plant to a stigma in the same flower or to another flower on the same plant |
| Fertilisation | An egg cell and the male gamete from the pollen grain join together and their nuclei fuse into one. Forms a zygote |
| What needs to start cell division? | The water allows the cells in the embryo to swell up and start cell division. It softens the seed coat too, allowing the embryo to grow through it. |
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