Answer:
Blastocyst is an early embryonic stage in mammals otherwise it is a blastula which is followed by development of gastrula. Blastocyst is a hollow ball like structure that develops by repeated cell division from zygote . It is superficially covered by a layer of cells collectively termed trophoblast.
Explanation:
Answer:
The correct answer is option B. membrane budding requires transient breakages in the bilayer membrane.
Explanation:
Phospholipid bilayer consists of two layers of the phospholipids with a hydrophilic head externally and hydrophobic tail internally in each phospholipid molecule. It is the surrounding membrane that encloses the cell cytoplasm and contents.
Internally phospholipid bilayer are hydrophobic due to hydrophobic in nature. It acts as a barrier that separates the cell from the external environment. It is possible to spontaneous formation of bilayers is due to to the chemical properties.
Thus, the correct answer is option B.
Answer:
See explanation below.
Explanation:
Mitosis is the duplication of cells in the bodies of plants and animals. All cells can undergo mitosis. Mitosis benefits the body by replacing cells as needed. The skin for example loses a lot of cells. Mitosis is when cells reproduce - and results in an exact copy - to replace the cells that are lost or need to be replaced for other reasons.
Meiosis is the duplication of cells that are not alike. In Mitosis, the duplicate cells are an exact copy, with a full exact copy of the body's DNA. In Meiosis, the new cells are different in that each one has half of the DNA - or half the number of chromosomes. Meiosis allows for the creation of cells that allows for sexual reproduction. Meiosis is the process that creates sperm and eggs. These cells are known as haploid cells - in that other cells are known as diploid, with full DNA and cells that have gone through the meiosis process have half and are known as haploid cells.
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1. Multicellular
2. Multicellular, tissues, bilateral symmetry, body cavity, coelom, segmentation, jointed appendages, exoskeleton
3. Annelids
4.Jointed appendages, exoskeleton
5. Evolutionary phylogeny is unknown, but it is known to have some of these adaptive traits (multicellular, tissues, bilateral sym, body cavities, coelom)
6.sponges, jellyfish, roundworms, snails
The four steps to comprehend health concepts related to health promotion and disease prevention are: (1) study health information; (2) ask questions about information you don't understand; (3) use health knowledge to from health concepts; (4) and use health concepts to reduce your risk.