noun a group consisting of an indeterminate number of things or people.

What is Polyad Botany?

composite pollen grains, or multimers, occur in approximately 15% of flowering plant families and in all acacia genera (Fabaceae, Mimosa subfamily). … data suggest that multimerization of acacia, as in Asclepiads and orchids, is a mechanism that helps ensure fruiting after a single pollination event.

Is expression a word?

Compare publications in French. … Compare the publication in French. leak noun. Communication of technology or science to the publicthe public’s scientific awareness.

Is dementia a word?

(ancient) deprivation of reason; crazy.

Is craving a word?

sexual desire; enthusiasm.

How to Pronounce « Orchard » in Standard British English: Daily Vocabulary #27

23 related questions found

What is Decussate Tetrad?

Discuss quadruplets:

Pairs pollen grains At right angles to each other, eg Magnolia grandiflora (Magnoliaceae).

What is Melissopalynology Botany?

Melissopalynology is Research the pollen in honey, especially the source of the pollen…information obtained from studies of a given sample of honey (and pollen) is useful in substantiating claims of a particular source of the sample.

What is Masulae in Botany?

1: A coherent mass of pollen grains (as in some orchids) develops from a single pollen mother cell. 2: Forms a hardened cytoplasmic layer around the mature microspores of some heterosporous ferns (e.g. Mangosteen)

What is the Nemec phenomenon?

NEMEC (1898) observed embryo sac-like pollen grains in the petaloid anthers of Hyacinthus orienta/is. He believed that they were formed by 3 successive divisions of the vegetative nucleus. … (4) Generate kernels. The Nemec phenomenon is Female-to-male dominance in microspores.

What is the biological significance of sporopollenin?

Sporopollenin is one of them Most chemically inert biopolymers. It is the main component of the hard outer wall (exine) of plant spores and pollen grains. It is chemically very stable and generally preserves well in soils and sediments.

What is bee research called?

Apiology – (from Latin apis, « bee »; and Ancient Greek -λογία, -logia) is the scientific study of bees. Honey bees are often selected as research groups to answer questions about the evolution of social systems.

What is self-incompatibility in plants?

Incompatibility is A widespread mechanism in flowering plants that prevents inbreeding and promotes outcrossingThe self-incompatibility response is genetically controlled by one or more multiallelic loci and relies on a complex series of cellular interactions between self-incompatibility pollen and pistil.

How much pollen is in honey?

Absolute pollen counts (i.e. the number of pollen grains per 10 g honey sample) indicated that 13 samples belonged to group I (,20,000 kinds of pollen grains), 4 (20,000-100,000) in group II and 2 (100,000-500,000) in group III. Single-flower honey with non-toxic pollen grains predominates and is less valuable.

What does the word quadruplet mean?

in meiosis.Each pair of chromosomes – called a tetrad, or bivalent– Consists of four chromatids. At this point, homologous chromosomes exchange genetic material through a crossover process (see linkage group).

What is microsporogenesis?

So, microsporogenesis is Production of tiny spores inside plants. Pollen is the male gametophyte (reproductive stage) of seed plants, and each pollen delivers a very small amount of sperm cells to the plant’s embryo sac.

What’s in the anther?

Anthers consist of four sac-like structures (microsporangia) produce pollen for pollination. Small secretory structures, called nectaries, usually located at the base of the stamens; they provide food rewards to pollinators in insects and birds.

What is an example of self-incompatibility?

(Science: Plant Biology) Pollen grains cannot fertilize flowers of the same plant or its close relatives. as a mechanism to ensure reproduction in certain plant species, such as in the case of the s gene complex in Brassica.

What is Self-Incompatibility Short Answer?

Incompatibility is A condition in which pollen fails to pollinate the stigma of the same flower or other flowers of the same plant. It is a genetic mechanism that prevents self-pollination by inhibiting the growth of pollen tubes in the pistil.

What are the benefits of self-incompatibility?

Breeding of fruits and grown crops 2 + 1

Self-incompatibility can be selected in the absence of male sterility Promoting the production of F1 hybrid cars. If there is self-incompatibility, seedless varieties, such as pineapples, grapes, etc., can be evolved.

Why is it called a bee farm?

etymology. The first known use of the word « apiary » was in 1654.The basis of the word comes from From the Latin word « apis », which means « bee », which leads to « apiarium » or « beehouse », which ultimately leads to « apiary ». … The term apiarist usually refers to a beekeeper who is concerned with only one type of bee.

What is Doctor Bee?

Doctor Bee, Treat Hives to Fight Dangerous Diseases. …their complex wobble language conveys the exact orientation, the angle relative to their hive and the sun, and the quality of the flowers.

Are bees animals?

Are bees animals? yes, bees are animals Bees, like all invertebrates, are part of the animal kingdom.

What enzymes can degrade sporopollenin?

Catalase (both at high levels at the pollination interface) was experimentally sufficient to degrade the sporopollenin of some members of the cruciferous family.

What is the main function of sporopollenin?

The outer walls or outer walls of pollen grains contain sporopollenins. It is one of the most resistant organic compounds known.it Protects pollen grains from external factors such as temperature, acid, alkali, etc.. Pollen grains are preserved as fossils due to sporopollenin.