- Science Publishing Group
... and predators. The young leaves its mother after about six months to establish its own territory. Stags often fight between one another for possession of mating the does. Indian Muntjacs are distinguished from other ungulates in showing no evidence of a specific breeding season within the species gi ...
... and predators. The young leaves its mother after about six months to establish its own territory. Stags often fight between one another for possession of mating the does. Indian Muntjacs are distinguished from other ungulates in showing no evidence of a specific breeding season within the species gi ...
Male reproductive investment and queen mating
... far as data are available on AG function in social insect males, they all suggest that these secretions are meant to increase male reproductive success. For example, AG compounds form mating plugs in ants and bumblebees (Brown et al., 2002; Duvoisin et al., 1999; Monnin and Peeters, 1998). In the la ...
... far as data are available on AG function in social insect males, they all suggest that these secretions are meant to increase male reproductive success. For example, AG compounds form mating plugs in ants and bumblebees (Brown et al., 2002; Duvoisin et al., 1999; Monnin and Peeters, 1998). In the la ...
SRE talk for all parents Nov 2016 PPT File
... • Pupils can explain accurately and confidently how to keep themselves healthy. They make informed choices about healthy eating, fitness and their emotional and mental well-being. They have an age-appropriate understanding of healthy relationships and are confident in staying safe from abuse and exp ...
... • Pupils can explain accurately and confidently how to keep themselves healthy. They make informed choices about healthy eating, fitness and their emotional and mental well-being. They have an age-appropriate understanding of healthy relationships and are confident in staying safe from abuse and exp ...
Asexual Reproduction
... 6. used by unicellular organisms Directions: Place your response on the lines provided. ...
... 6. used by unicellular organisms Directions: Place your response on the lines provided. ...
Chapter 4
... Reproduction-asexual and sexual • ---Asexual reproduction by strobilization and formation of ephyrae (This is a unique characteristic feature of Scyphozoa) ---Sexual reproduction by gametogony and spp. mostly dioecious with male and female medusas ---Life cycle involves fertilized egg--ciliated plan ...
... Reproduction-asexual and sexual • ---Asexual reproduction by strobilization and formation of ephyrae (This is a unique characteristic feature of Scyphozoa) ---Sexual reproduction by gametogony and spp. mostly dioecious with male and female medusas ---Life cycle involves fertilized egg--ciliated plan ...
Reproduction - Male
... Transmission of nutrients from dam to young. Transmission of wastes from young to dam. Protection of young from shock and adhesions by means of Amniotic Fluid. Prevention of bacteria and other large molecular substances from dam to young. The secretion of certain hormones; HCG (woman) and PMSG (mare ...
... Transmission of nutrients from dam to young. Transmission of wastes from young to dam. Protection of young from shock and adhesions by means of Amniotic Fluid. Prevention of bacteria and other large molecular substances from dam to young. The secretion of certain hormones; HCG (woman) and PMSG (mare ...
ASEXUAL REPRODUCTION a result of mitosis
... organism produces offspring without meiosis and fertilization. Because the offspring inherit all their DNA from one parent, they are genetically identical to each other and to their parent. ...
... organism produces offspring without meiosis and fertilization. Because the offspring inherit all their DNA from one parent, they are genetically identical to each other and to their parent. ...
Black-eared Miner - Birdlife Australia
... Biosphere Reserve and Murray Sunset National Park. Their status in Scotia Sanctuary and Tarawi Nature Reserve (NSW) is less well known. In January 2014 fire wiped out an important population in Bronzewing Flora and Fauna Reserve (Vic). Habitat Black-eared Miners live in mallee eucalypt woodlands, wi ...
... Biosphere Reserve and Murray Sunset National Park. Their status in Scotia Sanctuary and Tarawi Nature Reserve (NSW) is less well known. In January 2014 fire wiped out an important population in Bronzewing Flora and Fauna Reserve (Vic). Habitat Black-eared Miners live in mallee eucalypt woodlands, wi ...
The mating system of the brown bear Ursus arctos
... & Oring 1977). Mating systems and strategies are driven by the strength of sexual selection, which in turn is determined by male-male competition and female mate choice (Shuster & Wade 2003, Shuster 2009). Over 90% of mammalian species are polygynous, and the energetic investments in gametes and rea ...
... & Oring 1977). Mating systems and strategies are driven by the strength of sexual selection, which in turn is determined by male-male competition and female mate choice (Shuster & Wade 2003, Shuster 2009). Over 90% of mammalian species are polygynous, and the energetic investments in gametes and rea ...
Sexual Size Dimorphism, Diet, and Reproduction in the Mexican
... There are many hypotheses regarding the evolution of SSD (Shine 1993). For example, SSD may evolve through delayed maturation of the larger sex. The delay in reproduction may be compensated by a higher rate of reproduction or, in indeterminate growers, by a longer lifespan (Bronikowski 2008). A long ...
... There are many hypotheses regarding the evolution of SSD (Shine 1993). For example, SSD may evolve through delayed maturation of the larger sex. The delay in reproduction may be compensated by a higher rate of reproduction or, in indeterminate growers, by a longer lifespan (Bronikowski 2008). A long ...
Reproduction in Organisms
... (ii) the offsprings are not protected from the predators, and (iii) a large number of gametes are wasted. Q. 13. Differentiate between a zoospore and a zygote. Ans. A zoospore is usually flagellated, haploid or diploid spore formed inside a zoosporangium. The zygote, on the other hand, is al ...
... (ii) the offsprings are not protected from the predators, and (iii) a large number of gametes are wasted. Q. 13. Differentiate between a zoospore and a zygote. Ans. A zoospore is usually flagellated, haploid or diploid spore formed inside a zoosporangium. The zygote, on the other hand, is al ...
Assortative mating among animals of captive and wild origin
... To prevent imminent extinction, individuals of threatened species may be removed from the wild to establish captive breeding programmes, usually with the aim of providing individuals to supplement or re-establish wild populations after the key threats have been mitigated [1–3]. Such conservation app ...
... To prevent imminent extinction, individuals of threatened species may be removed from the wild to establish captive breeding programmes, usually with the aim of providing individuals to supplement or re-establish wild populations after the key threats have been mitigated [1–3]. Such conservation app ...
Reproduction in Plants and animals
... two by mitosis. One part of the nucleus moves into the bud which enlargens filling with cytoplasm and then can detach off the parent or remain attached to it to form a colony. Draw the diagram of yeast multiplying by budding from Advanced biology by Michael Kent .page 375 Fragmentation This is the ...
... two by mitosis. One part of the nucleus moves into the bud which enlargens filling with cytoplasm and then can detach off the parent or remain attached to it to form a colony. Draw the diagram of yeast multiplying by budding from Advanced biology by Michael Kent .page 375 Fragmentation This is the ...
REPRODUCTION: THE CONTINUITY OF LIFE
... Pollination brings together the gametes of a flower and it occurs when a pollen grain of the right kind lands on the stigma of the pistil. Each pollen forms a tube that grows down through the pistil and reaches the ovule in the ovary. One of the nuclei in the pollen tube unites with the egg nucleus ...
... Pollination brings together the gametes of a flower and it occurs when a pollen grain of the right kind lands on the stigma of the pistil. Each pollen forms a tube that grows down through the pistil and reaches the ovule in the ovary. One of the nuclei in the pollen tube unites with the egg nucleus ...
Cell Reproduction
... Some organisms look and act exactly like their parent. Others share many similar traits, but they are definitely unique individuals. Some species have two parents, whereas others have just one. How an organism reproduces determines the amount of similarity the organism will have to its parent. Repro ...
... Some organisms look and act exactly like their parent. Others share many similar traits, but they are definitely unique individuals. Some species have two parents, whereas others have just one. How an organism reproduces determines the amount of similarity the organism will have to its parent. Repro ...
Cells The Basic Unit of Life
... During this passage, _______________, secreted by the _______________, _______________ and Cowper’s glands are mixed with the sperm. This mixture is called _______________. During sexual intercourse, _______________ is released through the urethra and deposited in the female’s_______________. The fe ...
... During this passage, _______________, secreted by the _______________, _______________ and Cowper’s glands are mixed with the sperm. This mixture is called _______________. During sexual intercourse, _______________ is released through the urethra and deposited in the female’s_______________. The fe ...
doc lab final notes
... o asexual reproduction is accomplished by budding, which occurs when a new individual grows as a bud off of a parent hydra. This new organism is an identical copy to its parent. Eventually, the bud detaches when it has grown enough to capture its own food and live independently o budding usually tak ...
... o asexual reproduction is accomplished by budding, which occurs when a new individual grows as a bud off of a parent hydra. This new organism is an identical copy to its parent. Eventually, the bud detaches when it has grown enough to capture its own food and live independently o budding usually tak ...
Rat Dissection Instructional Packet
... FEMALE REPRODUCTION • Since the females are pregnant, identification of the female organs will be difficult since we will be removing the uterus that contain the babies. • However, if you follow a short gray tube extending to the URINARY BLADDER from the exterior, this is the VAGINA. Following thi ...
... FEMALE REPRODUCTION • Since the females are pregnant, identification of the female organs will be difficult since we will be removing the uterus that contain the babies. • However, if you follow a short gray tube extending to the URINARY BLADDER from the exterior, this is the VAGINA. Following thi ...
Reproduction - cloudfront.net
... Reproduction: “Good” traits are passed on and strengthen the species which increases their survival rate. ...
... Reproduction: “Good” traits are passed on and strengthen the species which increases their survival rate. ...
Moth or Butterfly? - Wet Tropics Management Authority
... The largest Australian Moth is the Hercules Moth and it lives in the tropical rainforests. It has a wing span of about 25cm. The males are smaller than the females. They are brown with tapering tail-like hind wings. The female Hercules produces chemicals to attract males. The males detect the female ...
... The largest Australian Moth is the Hercules Moth and it lives in the tropical rainforests. It has a wing span of about 25cm. The males are smaller than the females. They are brown with tapering tail-like hind wings. The female Hercules produces chemicals to attract males. The males detect the female ...
Reproductive versus ecological advantages to larger body size in
... predator attacks or thermal extremes: Grigg et al. 1979, Magnhagen 1991, Arnold 1993). In practice, the two kinds of processes are tightly linked, with both types of selection simultaneously operating on the range of body sizes within a population (e.g., Shine 1988, Preziosi and Fairbairn 1997). In ...
... predator attacks or thermal extremes: Grigg et al. 1979, Magnhagen 1991, Arnold 1993). In practice, the two kinds of processes are tightly linked, with both types of selection simultaneously operating on the range of body sizes within a population (e.g., Shine 1988, Preziosi and Fairbairn 1997). In ...
README.
... variables are a summary rather than a true calculation, with “Expected_Gestation_day” identified as the most commonly used at the DLC for each species, which in most cases lies on the lower end of the gestation range. More thorough analyses of descriptive DLC breeding records may result in fine-tuni ...
... variables are a summary rather than a true calculation, with “Expected_Gestation_day” identified as the most commonly used at the DLC for each species, which in most cases lies on the lower end of the gestation range. More thorough analyses of descriptive DLC breeding records may result in fine-tuni ...
Inverts
... Reproduction: can be asexual (budding) or sexual by releasing sperm that enters other sponges through pores where it will fertilize the egg. After ...
... Reproduction: can be asexual (budding) or sexual by releasing sperm that enters other sponges through pores where it will fertilize the egg. After ...
(Part 2) Life history evolution
... • trade-offs between life history traits are unavoidable! • variation in life-histories are due to differences in the allocation of energy. • Organisms that find “optimal balance” between costs and benefits are favored by natural selection. • The “optimal” solution might be different in different ...
... • trade-offs between life history traits are unavoidable! • variation in life-histories are due to differences in the allocation of energy. • Organisms that find “optimal balance” between costs and benefits are favored by natural selection. • The “optimal” solution might be different in different ...
Reproductive suppression
Reproductive Suppression involves the prevention or inhibition of reproduction in otherwise healthy adult individuals. It includes delayed sexual maturation (puberty) or inhibition of sexual receptivity, facultatively increased interbirth interval through delayed or inhibited ovulation or spontaneous or induced abortion, abandonment of immature and dependent offspring, mate guarding, selective destruction and worker policing of eggs in some eusocial insects or cooperatively breeding birds, and infanticide (see also infanticide (zoology)), and infanticide in carnivores) of the offspring of subordinate females either by directly killing by dominant females or males in mammals or indirectly through the withholding of assistance with infant care in marmosets and some carnivores.The Reproductive Suppression Model argues that “females can optimize their lifetime reproductive success by suppressing reproduction when future [physical or social] conditions for the survival of offspring are likely to be greatly improved over present ones”. When intragroup competition (competition between individuals belonging to the same group) is high it may be beneficial to suppress the reproduction of others, and for subordinate females to suppress their own reproduction until a later time when social competition is reduced. This leads to reproductive skew within a social group, with some individuals having more offspring than others. The cost of reproductive suppression to the individual is lowest at the earliest stages of a reproductive event and reproductive suppression is often easiest to induce at the pre-ovulatory or earliest stages of pregnancy in mammals, and greatest after a birth. Therefore, neuroendocrine cues for assessing reproductive success should evolve to be reliable at early stages in the ovulatory cycle.Reproductive suppression occurs in its most extreme form in eusocial insects such as termites, hornets and bees and the mammalian naked mole rat which depend on a complex division of labor within the group for survival and in which specific genes, epigenetics and other factors are known to determine whether individuals will permanently be unable to breed or able to reach reproductive maturity under particular social conditions, and cooperatively breeding fish, birds and mammals in which a breeding pair depends on helpers whose reproduction is suppressed for the survival of their own offspring. In eusocial and cooperatively breeding animals most non-reproducing helpers engage in kin selection, enhancing their own inclusive fitness by ensuring the survival of offspring they are closely related to. Wolf packs suppress subordinate breeding.