Answer: Here you go!
Explanation:
Analogous structures are structures that are similar in unrelated organisms. The structures are similar because they evolved to do the same job, not because they were inherited from a common ancestor. For example, the wings of bats and birds, shown in Figure below, look similar on the outside
Answer:
a) DNA fragments associated with histone proteins are all multiple in length (i.e., 260 bp, 520 bp, 780 bp, etc), thereby suggesting the presence of a pattern of organization in the chromatin
b) it suggests that each unit of organization (ie, each nucleosome) consists of 260 bp associated with chromatin proteins
Explanation:
The nucleosome is considered as the basic unit of chromatin. A nucleosome consists of approximately two turns of DNA wrapped around a core of eight histone proteins (i.e., a histone octamer). The histone octamer consists of two copies of each of the histones H2A, H2B, H3, and H4. Moreover, the nucleosomes are connected together by linker DNA sequences which vary between 10 and 100 bp in length.
Neurulation is termed as the folding process within which is invertebrates embryos. It includes the transformation of the neural plate into the neural tube. At this transformation of the neural plate into the neural tube. At this stage, the embryo is known as neurula.
The process starts when notochord induces the formation of the central nervous system and this is by signaling the ectoderm germ layer which is above and it forms flat and thick neural plate.
The work of neural tube and then later differentiates to the brain and spinal chord which then forms central nervous system.
Neural tube portions forms by two different processes. for example secondary neurulation and primary neurulation.
Secondary neurulation the tube forms by hollowing out of the interior of the solid precursor
In primary neurulation, the neural plates crease inward until when the edges come into fuse and contact
