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Short Answer:
Asexual animals are rare, but they exist. Most, but not all have a sexual reproduction phase.
The exceptions are discussed below and in related links.
Longer Answer:
The term for asexual reproduction is parthenogenesis. Asexual reproduction in plants, fungi, molds and bacteria is commonplace. This answer deals animals and includes fish and insects and reptiles.
A number of species can produce both sexually and asexually. This has been observed in some species of aphids, Daphnia, rotifers, nematodes. Some invertebrates, and . Apparently other Among vertebrates, certain lizards have this ability including Komodo dragons. Asexual reproduction is documented in two shark species, hammerhead- and blacktop.
If one considers cloning a form of asexual reproduction, i.e. making identical copies of an original that was the result of combining male and female genetic materials, then a number of higher animals do this in the womb with the 9-banded armadillos being the most studied example. (Twins in humans and other animals are considered an accident version of this and not true asexual reproduction, but that is a matter of opinion.) Several insects (Hymenoptera) have this ability.
The rarest form of animal asexual reproduction is obligate parthenogenesis where the species propagates with only an asexual mechanism.
There are over 80 species reptiles, amphibians and fishes which no longer involve males in the reproductive process. Bdelloid rotifers have evolved in this manner as well as two species of stick insects.
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Describe the nitrogen cycle and explain why it is important for the survival?
The nitrogen cycle is how nitrogen moves between plants, animals, bacteria, the atmosphere, and the soil. In each phase, it is in a different form.
Does DNA replicate in mitosis?
no DNA replicates before mitosis. It replicates in the S phase of inter phase
Why does the phase of the moon effect animals?
Animal research claims the lunar cycle may affect hormonal changes in insects. The lunar cycle influences reproduction in fish. The moon phases supposedly effect reproduction and menstruation in humans as well.
How do ticks lay eggs?
Ticks lay eggs just like most insects: oviposition of fertilized eggs. If you are wondering about hard ticks (for example, deer ticks, or hard ticks (Ixodidae is the family), then your answer in terms of location is in the leaf litter of forests (i.e. on the ground). They do not lay them on animals usually as far as I know, and definitely not IN animals. Once these eggs hatch, they begin their triphasic life cycle, taking usually one year for each phase (larval, nymphal, and adult phase). They feed once per life cycle, then drop to the ground from their host and overwinter, until the next spring and phase comes. The exception here is the adult phase; once they have fed as an adult (generally only female adults will feed, the males seek a host but use it really as a method to find a female to fertilize rather than to eat), they drop to the ground and immediately die (males) or lay their eggs (female). As adults, the females' last meal is usually really significant, causing them to swell to a size unique to this life phase. If you see a really engorged tick on your dog (or any non-human mammal, we seldom let ticks attach and feed long enough to become engorged), it is probably a female tick.
Does the phase of the moon affect chicken egg production?
The phase of the moon affects ocean tides and barometric pressure. It is logical that it would affect egg production.
What phase of the sexual response can last the longest?
resolution.
What are the 5 kingdoms characteristics?
Plants are 1) Eukaryotic, 2) Photosynthetic, 3) Multicellular, 4) Sexually reproducing, and 5) their Life History involves an alternation of a haploid phase (Gametophyte) with a diploid phase (Sporophyte)
Are jelly fish sexual or asexual?
Stingrays are sexual, they mate during their matting season
Why is penicillium classified as deuteromycota?
It is grouped under ascomycetes because its produces ascospores, in sexual reproduciton phase. Ascospores are sexual spores which are covered in a covering known as ascus.
What is a gametophype?
Gametophyte, in plants and certain algae, the sexual phase (or an individual representing the phase) in the alternation of generations—a phenomenon in which two distinct phases occur in the life history of the organism, each phase producing the other. The nonsexual phase is the sporophyte.
How do you know if being gay isn't just a phase?
There's actually no such thing as a gay phase. This is an outdated concept. There is a phase where some teens might worry about their sexual orientation, but that's a different issue.
Explain the first and second phase of sexual activity?
The first phase of sexual activity is the arousal phase, characterized by increased blood flow to the genitals, muscle tension, and increased heart rate. The second phase is the plateau phase, where arousal continues to build and can lead to increased sensitivity and tension in the body.
What is the type of fungi in which a sexual phase has not been observed?
What is the resting spore during the sexual phase of the mold's life cycle called?
Well referring to my Biology text book, " A Zygospore ( ZY-goh-spawr ) is a resting spore that contains zygotes formed during the sexual phase of the mold's life cycle."
What is resting spore formed during the sexual phase of the mold's life cycle is called?
Well referring to my Biology text book, " A Zygospore ( ZY-goh-spawr ) is a resting spore that contains zygotes formed during the sexual phase of the mold's life cycle."
Is bisexual a phase?
It can be if you let it be. Typically people start out as bisexual and then feel more comfortable about there sexual orientation.
What is the end result of meiosis phase 1?
The last phase is Telophase and it causes sexual reproduction of the cell into four haploid daughter cells.
