What is Robert Hooke cell theory?

What is Robert Hooke cell theory?

While observing cork through his microscope, Hooke saw tiny boxlike cavities, which he illustrated and described as cells. He had discovered plant cells! Hooke’s discovery led to the understanding of cells as the smallest units of life—the foundation of cell theory.

What’s the largest cell in the world?

The world’s largest single celled organism is an aquatic alga called Caulerpa taxifolia. The largest cell in the world is an ostrich’s egg. Before fertilization, the entire interior of the egg consists of a single cell, which weighs up to 5 pounds.

What animal has the largest egg cell?

ostrich

Which animal lays the smallest egg?

bee hummingbird

What is a female egg?

The ovaries are two small organs, about the size of your thumb, that are located in the female pelvis. They are attached to the uterus, one on each side, near the opening of the fallopian tube. The ovaries contain the female gamete cell, called the oocyte. In non medical terms, the oocyte is called the “egg”.

Can a woman fertilize her own egg?

Instead, a woman “could use her own stem cells and an artificial Y chromosome to produce healthy new eggs and sperm at any age,” says Kira Cochrane at iol, creating a “pseudo-sperm” that would fertilize an egg to create an embryo.

Is it possible for a girl to get pregnant by a girl?

The short answer to this question is no, not through sexual intercourse. Two cisgender women (meaning assigned female at birth) in a relationship cannot become pregnant without some form of assisted reproductive technology (ART). The reasoning goes back to basic biology and how an embryo is formed.

Can humans self impregnate?

There is a hypothetical scenario, though, in which it could be possible for a human to self-fertilize. Indeed, it is known to occur in non-human species where hermaphroditic animals are common. However, no such case of functional self-fertilization or true bisexuality has ever been documented in humans.

Can hermaphrodite have a baby?

Background: There are 11 reported cases of pregnancy in true hermaphrodites, but none with advanced genetic testing. All known fetuses have been male. Case: A true hermaphrodite with a spontaneous pregnancy prenatally known to have a remaining portion of a right ovotestis, delivered a male neonate.

Can a human hermaphrodite have a baby with itself?

Hermaphrodites can either reproduce by virtue of self-fertilization or they can mate with a male and use the male derived sperm to fertilize their eggs. While virtually the entire progeny that is produced by self-fertilization is hermaphroditic, half of the cross-progeny is male.

Are there any true human hermaphrodites?

Such conditions are extremely rare in humans. In true gonadal intersex (or true hermaphroditism), an individual has both ovarian and testicular tissue. The ovarian and testicular tissue may be separate, or the two may be combined in what is called an ovotestis.

Can human females reproduce asexually?

Females can potentially switch between sexual and asexual reproductive modes, or reproduce entirely asexually, but males cannot clone themselves. While parthenogenesis makes it possible for females to reproduce without males, males have no way to reproduce without females.

Can a hermaphrodite have both working parts?

The true hermaphrodite has both testicular and ovarian tissues present in either the same or opposite gonads. Both the external genitalia and the internal duct structures display gradations between male and female. Among those raised as females, two-thirds will have clitoromegaly. …

What is a Pseudohermaphrodite?

The term male (gonads are testes) or female (gonads are ovaries) pseudohermaphrodite refers to the gonadal sex (the gender of the internal reproductive organs). There are two primary causes of male pseudohermaphroditism: Androgen insensitivity syndrome – children who have: 46, XY karyotype.