TCAA
A IS TO T
AND G IS TO C
A is complementary to t and c is complementary to G. So when you see A you put T and visa versa.
Explanation:
New ocean crust is formed at the mid ocean ridges. The new crust is then pushed away from the ridge as newer crust comes to the surface. The ocean crust then spreads out enlarging the ocean. The farer away from the ridge the ocean crust is the older the crust
The question is incomplete. The complete question is:
A recent study compared the Homo sapiensgenome with that of Neanderthals. The results of the study indicated that there was a mixing of the two genomes at some period in evolutionary history. What data were discovered that suggested this conclusion
A) some Neanderthal sequences not found in living humans
B) a few modern H. sapiens with some Neanderthal sequences
C) duplications of several Neanderthal genes on a Neanderthal chromosome
D) some Neanderthal chromosomes that are shorter than their counterparts in living humans
Answer:
B) a few modern H. sapiens with some Neanderthal sequences
Explanation:
The mixing of genomes of two species generally results in shared sequences and some common genetic traits in the descendants of these species. Mixing of genomes of <em>Homo sapiens</em> and Neanderthals would have resulted in the presence of some common gene sequences in their genomes. If the conclusion that the mixing of genomes of these two species has occurred is correct, some of the modern <em>Homo sapiens </em>should have the genome sequences that were otherwise present in the genomes of Neanderthals only but not in that of the <em>Homo sapiens</em>.
The proposal that a human sperm contained a miniature human being is consistent with the now-discredited theory of development known as preformation theory.
Preformation theory, a historically well-liked belief that creatures develop from miniature replicas of themselves, has a long history in biology. Preformationists thought that the shape of living things already existed in reality before their growth, as opposed to being put together from components.
Hippocrates and Anaxagoras were the first thinkers to put forth a preformation theory, with Hippocrates proposing that the zygote contains all of the adult's structural components and Anaxagoras asserting that the paternal semen contains all of the child's components.
To learn more about preformation theory, theory of development and preformationist here,
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B) Meiosis 1.
During anaphase, homologous pairs of chromosomes are separated into their own haploid daughter cells.
