Each stamen generally has a stalk called the filament (from Latin filum, meaning "thread"), and, on top of the filament, an anther (from Ancient Greek anthera, feminine of antheros "flowery," from anthos "flower"), and pollen sacs, called microsporangia. The development of the microsporangia and the contained haploid gametophytes, (called pollen grains) is closely comparable with that of the microsporangia in gymnosperms or heterosporous ferns. The pollen is set free by the opening (dehiscence) of the anther, generally by means of longitudinal slits, but sometimes by pores, as in the heath family (Ericaceae), or by valves, as in the barberry family (Berberidaceae). It is then dropped, or carried by some external agent — wind, water or some member of the animal kingdom — onto the receptive surface of the carpel of the same or another flower, which is thus pollinated. It is the part that contains the sperm
PURPOSE The purpose of this experiment is to determine whether magnets have an effect on the growth of radish seedlings. I became interested in the study of the effect magnets, when I discovered that magnets could make you heal faster. Later I decided that that it would be a better idea to study the effect of magnets on plants to keep it a safe experiment. The information gained from this experiment may be used to help gardeners growing radishes or other plants. HYPOTHESIS My hypothesis is that the stem of each plant will be attracted to the magnet.
The Biodiversity of Pollinating Bees, Hymenoptera Apoidea, and Their Importance in Conservation Ally Giguere, Conservation Biology, James Cook University Cairns, Australia May 16th, 2008 __________________________________________________________ Introduction: Bees (Hymenoptera, Apoidea) are responsible for 85% of flower pollination in both North America and Central Europe (Muller et. al 2005). They collect pollen on hairs on their hind legs (Kearns et. al 1998) which they then use to create a nectar substance which acts as food for their brooding larvae. The pollen which remains on their hind legs is transferred from flower to flower, allowing pollination of the flowers.
Explain. Beak depth Gizmo Warm-up Darwin’s finches are one of many types of animals on the Galápagos Islands that have unique adaptations, or traits that help an organism survive in its environment. The Rainfall and Bird Beaks Gizmo™ allows you to explore how rainfall influences the range of beak shapes found in a single finch species. 1. The beak depth of a finch is the distance from the top of the beak to the bottom, as shown.
The Anemone meaning wind flower, which signifies that the wind that blows the petal open will also, eventually, blow the dead petals away; are perennial herbs with an underground rootstock, and radical, more or less deeply cut leaves. The elongated flower stem bears one or several, white, red, blue or rarely yellow flowers. There is an involucre of three leaflets below each flower. The fruits often bear long hairy styles, which aid their distribution by the wind. They produce cup-shaped yellowish, white, purple, violet, or red Anemone flowers.
Pollan outlines the history of four crops-- apples, tulips, marijuana and potatoes. He discusses how humans have influenced their evolution and how crops have influenced our cultures. He recounts real stories, rather than myths, about such characters as “Johnny Appleseed,” an eccentric loner who helped colonize various apple crops across a new America. As a result, we do not have as many varieties of apples as once existed, and the ones we have are less resistant to pests. Pollan, Michael.
This experiment will look at how soda, juice, and water will affect the growth of plants. Diet sodas do not kill plants like regular sodas do. To keep data on how tall the plants grow each day I have been putting the heights of each plant in centimeters on a chart. I check the heights each day and water the plants with their given amount of liquids in the procedures. The liquids I am using are diet sierra mist, tap water and orange juice.
It makes cells enlarge or grow and, in the shoot, are eradicated by light. The accumulation of auxin on the shaded side of a plant causes this side only to lengthen, resulting in the shoot bending towards the light, causes cell elongation by activating proton pumps that expel H+ ions from the cytoplasm to the cell wall. State two adaptations of insect pollinated flowers Large/colorfull petals, petals release scent, sticky pollen grains Predict what will happen to the flowering process of a short day plant * If the flowering the process of a short day plant is interrupted by brief exposure light, it will not flower nor bloom. Outline the role of phloem in active translocation of biochemicals. Phloem have sieve tubes that transport organic compounds.
Such adaptation is known as a “Buttress Roots”. Without these adaptation trees wouldn’t be able to receive nutrients and die out. Question (ii): Discuss the role Humus (Decaying Vegetation Matter) on the forest floor plays in providing nutrients to rainforest soils. • Include a labelled diagram or a series of labelled diagrams to illustrate your answer. Answer (ii): The HUMUS play an important role needed for the survival of the rainforest in that the HUMUS is the provider of nutrients.
Comparing the Growth of Pea Plants Grown in the Light and in the Dark Aim: To compare the vertical growth and weight gain of pea plants grown in the light and in the dark. Background Knowledge: Photosynthesis forms the basis for this experiment. This is the process by which a plant makes food for itself from the raw materials around it. The energy needed for photosynthesis comes from sunlight, which is the variable for this experiment. The substance that absorbs sunlight is chlorophyll, which is mainly contained in chloroplasts.