Answer:
The animal cells produce the collagen but the plant cell does not produce collagen that responsible for producing the complex structure of protein and carbohydrates that is called extracellular matrix cell. Collagen is an important protein that provides strength to the structural integrity. On the other hand, the plant has not collagen so they have their extracellular supportive structure. The cell wall is so rigid and covered by the cell that protects it that provides shape and support to it. The plant cell also made up of molecules and these are called cellulose. These cellulose structured into the fibers that are called micro-fibrils
Answer:
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Explanation:
An electron transport chain (ETC) is a series of complexes that transfer electrons from electrondonors to electron acceptors via redox (both reduction and oxidation occurring simultaneously) reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.
Characters of the fossils of dinosaur indicate that
reptiles are closely related to birds
The general principle states that the present is the key to
the past. Dinosaurs are creatures of the past but from their fossils, it’s
evident that they are actually related to the present day birds. The shape of
the pelvis is one of the most common characters that link birds to dinosaurs. The
feature of the pelvic girdle shows that dinosaur-Deinonychus and the earliest
fossil bird Archaeopteryx are closely related; suggesting that birds are
closely related to dinosaurs.
Further, birds have feathers and reptiles have tough beaded
skin or scales. Although birds don’t resemble any living reptile, scientists
suggest that birds actually evolved from reptiles. One of the characteristic
that makes scientists believe so is that both birds and reptiles lay eggs and share several skeletal characteristics,
such as the way their jaws attaches to the skull. According to the fossils recovered
from the Solnhofen Limestone of Germany, it’s true to say that birds and
reptiles share a lot of characteristics. The fossils have a wishbone,
consisting of the fused clavicle bones so typical of birds and closely resemble
small theropod dinosaurs.
Another fossil in China suggest that theropods had feathers,
providing more evidence for this relationship. We cannot exhaust the
characteristics relating birds to reptiles but we have discussed some rigid and
proved evidence that relate birds to reptiles and dinosaurs.
