Stable ecosystems can be altered, either rapidly or slowly, through human activities, natural disasters, climatic changes. An ecosystem may be described as a community and its surrounding which includes non living organisms. Human activities such as deforestation, mining, dumping of wastes on the oceans alters and affects the ecosystem negatively and thus making the habitats unfavorable for the organisms. Natural disasters such as floods, tsunami and climatic changes may also alter the ecosystem.
Answer:
Explanation:
1 The first time the word cell was used to refer to these tiny units of life was in 1665 by a British scientist named Robert Hooke. Hooke was one of the earliest scientists to study living things under a microscope
2 Leeuwenhoek found animalcules
Dutch biologist and microscope pioneer Antoni van Leeuwenhoek observed in the late 1600s when he proclaimed the existence of a world of microscopic “animalcules”
3 The three parts of the cell theory are as follows: (1) All living things are made up of cells, (2) Cells are the smallest units (or most basic building blocks) of life, and (3) All cells come from preexisting cells through the process of cell division.
4 Four Common Parts of a Cell
Although cells are diverse, all cells have certain parts in common. The parts include a plasma membrane, cytoplasm, ribosomes, and DNA. The plasma membrane (also called the cell membrane) is a thin coat of lipids that surrounds a cell.
5 Ribosomes are small structures where proteins are made. They are found in both prokaryotic and eukaryotic cells
6 The main role of DNA in the cell is the long-term storage of information. ... The major function of DNA is to encode the sequence of amino acid residues in proteins, using the genetic code. To read the genetic code, cells make a copy of a stretch of DNA in the nucleic acid RNA.
here u go with your answers
Answer:
Strisores — nightjars, frogmouths, and other nocturnal birds, along with diurnal swifts and hummingbirds.
Columbaves — turacos, bustards, cuckoos, pigeons, sandgrouse, and mesites.
Gruiformes — cranes, rails, crakes, Sungrebe, flufftails, and others.
Aequorlitornithes — shorebirds, flamingos, grebes, gulls, tropicbirds, penguins, and other waterbirds.
Explanation:
Most of the middle layer in the heart is composed of cardiac muscle cells
I don’t think we would have the same countries. i feel like everything would be connected, like maybe a few really big countries instead of hundreds of different countries. i feel we would look different that how we already look because there would be more of different type of people around each other, resulting in mixed race reproducing.
