The process of meiosis consists of 8 total stages. Cell division happens twice in meiosis which means that a starting cell can produce a total of four gametes (sperm/egg) on it's own. The four daughter cells produced only have half the amount of chromosomes from the diploid parent cell. Meaning that since it is 'half' the production of meiosis will be a haploid gamete.
Double fertilization-plants with seeds (flowering plants), two male gametes joining with female gametophyte
Gametophyte generation-both (haploid, sexual stage stage-gametophyte, and the diploid stage that produces spores – sporophyte)
Endosperm formed-plants with seed because it is a tissue formed inside the seed which surrounds the embryo and provides nutrition
Mitosis-both (mitosis occurres in spores)
Spores develop into gametophytes-both but, in seedless plants sporophyte produces spores that will develop into a new organism (multicellular gametophyte) using mitosis, while spores of seed plants are produced internally and develop into more complex structures.
Answer:
The beginning of Cambrian period was about 541 million years ago and ends about 484.5 million years ago.
Explanation:
Cambrian period is a geographical period that appears in Paleozoic Era and lasts at Phanerozoic Eon to the beginning of Ordovician Period and the name was given as most of the sedimentary deposits were found at that period The majority of living organism includes unicellular or some multi cellular complex life forms.
Most live forms were aquatic and arthropods were the most dominant animals in the water that are known by studying the fossil records.The species adapt themselves to change with the environmental variations.
Animals like <em>Protichnites</em> and <em>Climactichnites</em> were found during this period.
The fossil records also suggested the presence of euthycarcinoides that are the extinct arthropod species.
The study of energy and its changing
form is called thermodynamics. Thermodynamics is the branch of physical science
that is concerned with conversions between heat and other forms of energy such
as chemical, electrical or mechanical energy. Under thermodynamics, energy can
be transferred from one place to another and from one form to another.
