An antheridium is a haploid structure or organ producing and containing male gametes (called antherozoids or sperm). … During pollination, this generative cell divides and gives rise to sperm cells. The female counterpart to the antheridium in cryptogams is the archegonium, and in flowering plants is the gynoecium. Are archegoniaRead More →
Cats nursing on dogs is not uncommon, although it’s a little weird. If your Maltese has not been spayed, she could actually start producing milk, which wouldn’t be good for her or the kitten. Otherwise, she could suffer irritation from the nursing, as well as bites and scratches if theRead More →
Yes. There is no evidence that a crop is dangerous to eat just because it is GM. There could be risks associated with the specific new gene introduced, which is why each crop with a new characteristic introduced by GM is subject to close scrutiny. What is the production ofRead More →
Coniferophyta, on the other hand, is a group of gymnosperms which bear naked seeds. They do not produce flowers or fruits. They are cone-bearing seed plants. Do Coniferophyta have covered seeds? Vascular plants with naked seeds (“gymnosperms”) are placed in five or more phyla (divisions): seed ferns (Pteridospermophyta), cycads (Cycadophyta),Read More →
Juvenile hormones are secreted by a pair of endocrine glands behind the brain called the corpora allata. Where is PTTH produced? The neuropeptide PTTH is synthesized in the corpora allata gland in the insect brain and functions in metamorphosis as a hormonal activator of ecdysone synthesis in the prothoracic gland.Read More →
Age. As men get older, the amount of semen released during ejaculation often decreases. A study by researchers in Israel found an inverse relationship between semen volume, sperm quality, and men’s age. The research revealed that men older than 55 experienced the most significant reductions in both volume and quality.Read More →
The Light Reactions The energy is then temporarily transferred to two molecules, ATP and NADPH, which are used in the second stage of photosynthesis. ATP and NADPH are generated by two electron transport chains. During the light reactions, water is used and oxygen is produced. What are the 3 stagesRead More →
Mycotoxins are toxic compounds that are naturally produced by certain types of moulds (fungi). Moulds that can produce mycotoxins grow on numerous foodstuffs such as cereals, dried fruits, nuts and spices. … Mycotoxins appear in the food chain as a result of mould infection of crops both before and afterRead More →
Compostable produce bags are loved by customers at farmers markets, co-ops, and natural food grocery stores. … Strong enough to line the compost bin, these versatile bags can also go right into the compost heap along with kitchen scraps. Are grocery bags biodegradable? Researchers fear that such ubiquitous bags mayRead More →
Select a sunflower variety. It is not possible to grow plants from roasted sunflower seeds, but you can grow it from sunflowers in bird seed, as long as the outer shell is present. Are there any benefits to eating sunflower seeds? Studies found that consumption of seeds — including sunflowerRead More →