sexual dimorphism, the differences in appearance between males and females of the same species, such as in colour, shape, size, and structure, that are caused by the inheritance of one or the other sexual pattern in the genetic material.
What is sexual dimorphism index?
Sexual dimorphism index (SDI) indicates percentage of difference between the sexes. https://doi.org/10.1371/journal.pone.0142653.t001. To assess whether the degree of sexual size dimorphism was sufficient to accurately determine sex from morphometric measurements, a discriminant function was developed.
What are sexually dimorphic features?
Sexual dimorphism is the condition where the sexes of the same species exhibit different characteristics, particularly characteristics not directly involved in reproduction. … Differences may include secondary sex characteristics, size, weight, colour, markings, or behavioural or cognitive traits.
What are dimorphic leaves?
Dimorphic – Literally, dimorphic means occurring in two forms. … When used in descriptions of evergreen azaleas (Rhododendron subgenus Tsutsusi), the term dimorphic refers to the two forms of leaves found on a given plant, not to the sequence of their emergence and senescence.
What is an example of dimorphic?
The golden orb-weaver spider, for example, is spectacularly dimorphic: the female may be 20 times the size of the male, and she usually ends up eating him, sometimes even while he’s mating with her. Many sea creatures, including many fish, take care of gender problems by simply changing from one sex into the other.
What dimorphism means?
Definition of dimorphism
: the condition or property of being dimorphic or dimorphous: such as. a : the existence of two different forms (as of color or size) of a species especially in the same population sexual dimorphism. b : the existence of a part (such as leaves of a plant) in two different forms.
What is sexually dichromatic?
Sexual dichromatism is a form of sexual dimorphism that refers to a difference in coloration between sexes within a species. While sexual dichromatism is common among birds, and to a lesser extent among lizards and fish, it is rare among mammals, with the exception of primates.
What is masculine facial dimorphism?
Facial sexual dimorphism emerges at puberty: as the size and shape of the male and female faces increase with age, faces begin to show different secondary sexual characteristics (i.e., masculine or feminine).
What is an example of intersexual selection?
Intersexual selection occurs as a result of interactions between males and females of a species. One sex, typically males, will develop and display traits or behavior patterns to attract the opposite sex. Examples of such traits include plumage on birds, the mating calls of frogs, and courtship displays in fish.
What is Heterophylly with example?
Plants like cotton, coriander, larkspur and buttercup have leaves in juvenile phase which are entirely different from the mature phase is known as heterophylly. Also, differ in either the plant is aquatic or terrestrial.
What is dimorphic branching?
Branch dimorphism is initiated after 1 to 2 years of growth at which time the apical meristem of the orthotropic shoot aborts and a pseudowhorl of plagiotropic branches is initiated from axillary positions in the shoot tip. … The apical meristem of this shoot eventually aborts and another pseudo- whorl is formed.
What do you mean by sunken stomata?
A sunken stomata is a stomata in a small pit, which protects the escaping water vapour from air currents, decreasing water loss from the leaf. Sunken stomata are commonly found in plants in arid environments as one of their adaptations to preserve water.
What are dimorphic traits?
The term dimorphism denotes a trait that occurs in two distinct forms or morphs within a given species and traits that differ consistently between males and females are sexual dimorphisms. Sexually dimorphic traits may differ so radically between sexes that they can be reliably used to differentiate males from females.
What triggers YM shift?
ym-shift. (Science: microbiology) The change in shape by dimorphic fungi when they shift from the yeast (Y) form in the animal body to the mould or mycelial form (M) in the environment.
What does dimorphism mean in microbiology?
Dimorphism is defined as the ability of a fungus to generate free-living vegetative cell types that are either yeast or hyphal (Fig. … Simple cartoons of the environmental and host forms of each fungal species are shown. In the environmental hyphal form of these organisms, oval swellings depict vegetative conidia.
Are cockroaches sexually dimorphic?
In cockroach, males and females have slightly different morphology, hence showing sexual dimorphism. One of the distinguishing features is presence of anal styles, (paired thread-like structure), only in males. Females lack anal styles.
What physical traits make a man attractive?
- Tallness. Every woman loves a tall guy to gaze upon and research says that we women prefer men who are 6 ft and taller.
- Eyes. …
- Hair. …
- Clothes. …
- A smile. …
- Jawline. …
- Tattoos. …
- Hygiene.
What are unattractive facial features?
Ugliest features according to women:
Bad skin. Un-groomed facial or body hair — unibrow, nose hairs, wild beard, excessive back hair. Crooked, large or otherwise ugly nose. Balding or unkempt hair (not specifically styled that way)
What are four manifestations of Intrasexual selection?
Intrasexual selection tends to lead to weaponry, armor, fighting ability, and threat displays. Examples include large body size in iguanas, infanticide in lions, antlers in deer, and so on.
What usually occurs during intersexual selection?
What usually occurs during intersexual selection? Males always choose females with whom to mate. Neither males nor females participate in sexual selection rituals because they are costly to overall survival. A member of one sex usually chooses their mate based on queues that exhibit good genes.
What is intra about Intrasexual selection?
Intra-sexual selection is part of sexual selection where members of the same sex (males) compete with each other to gain access to mate with females.
What is Heterophylly 11?
Hint: Heterophylly occurs in aquatic plants. The plants show more than one type of leaves at different stages of growth. Complete Answer: – Heterophylly can be defined as the presence of differently shaped leaves on the same or different stem of the same plant.
What is Hydrophily In short?
Hydrophily is a fairly uncommon form of pollination whereby pollen is distributed by the flow of waters, particularly in rivers and streams. Hydrophilous species fall into two categories: Those that distribute their pollen to the surface of water.
What is Heterophylly in cotton?
Heterophylly is one of the methods of plasticity in which plant follow several pathways in response to the external environment. Plants like cotton, coriander, larkspur and buttercup have leaves in juvenile phase which are entirely different from the mature phase.
Why are Cycas leaves dimorphic?
Leaves are dimorphic i.e. 2 types, assimilatory or foliage leaves and scaly leaves or cataphylls. Both the leaf types are born at the stem apex in alternate spirals. Foliage leaves are large (1 -3 m), green, pinnately compound. Petiole has 2 rows of spines.
What is leaf foliage?
Foliage refers to the leafy parts of a tree or plant. … The noun foliage refers to leaves — either individual leaves or the collective leafy canopy of many trees or plants.
What is the advantage of a needle over a flat leaf?
Needles have lower wind resistance than big, flat leaves, so they’re less likely to make the tree fall over during a big storm. Needles are tough for insects to eat.
Where do you find sunken stomata?
Halophytes. Hint: The term sunken means hidden so sunken stomata are the type of stomata that are hidden or not directly exposed to the surface. They are found below the leaves and the epidermis in the plants. These stomata are present in a small pit.
Which planet has sunken stomata?
Xerophytes are the plants which are found in extreme dry conditions. They have very less number stomata present in sunken pits and therefore called sunken stomata.
In which plant are sunken stomata found?
This sunken stomata condition found in leaves of succulent xerophytes (hot desert plants) facing high temperature condition and gymnosperms. Some plants with SUNKEN STOMATA are Nerium, Pine, Acacia, etc. Plants growing mostly in xerophytic conditions have sunken stomata where they need to reduce transpiration rate.
What is another word for dimorphic?
Dimorphic synonyms
In this page you can discover 4 synonyms, antonyms, idiomatic expressions, and related words for dimorphic, like: dimorphous, asexual, hermaphroditic and hermaphrodite.