The document discusses the classification of certain followers of Darwin, labeled as 'pseudo-Darwinians,' and the distinctions between their theories and Darwin's original ideas on evolution. It also compares genome sizes between rice and humans, attributing the differences largely to the complexity of morphological traits and evolutionary history. Furthermore, the text critiques Darwin's theory regarding the transmission of acquired characteristics and highlights points supporting and opposing both Darwinian and pseudo-Darwinian theories.

1. Some historians have referred to many of the self-proclaimed “Darwinians”, such as Ernst
Haeckel, that followed in Darwin’s footsteps at the end of the 19th century as “pseudo-
Darwinians”. In what sense were they Darwinian? In what sense were they not Darwinian?
Most evolutionary scientists would agree that evolution has led to increased complexity of life on
Earth.
Select one:
True
False
Rice has a genome size of about 420-460 million base pairs while humans have a genome size of
about 3 billion base pairs. Of the following, which is a possible reason for this difference?
Select one:
a. Humans are more complex morphologically.
b. Rice is a plant, while humans are animals.
c. Humans have more genes than rice.
d. The human genome has a lot of mobile genetic elements.
e. The vertebrate lineage has a longer evolutionary history.
Solution
Answer A)Darwin's theory is based on natural selection and the servival of fittest.
According to the theory the characteristics which are best fitted transfer to the next progeny.
Living animal compete for food ,shelter and basic requirements for their survival, dominant wins
the competition and get selected by nature to reproduce.
Acquired characters of a species throughout its lifetime pass to its progeny through genetic
material.Thus over a period of time due to accumulation of characteristics a new species evolve.
Darwin's could not account for either mechanism for trait (character) transmission or the basis
of variability among individual.
Hence new modified theory given by a group of scientist which is called psuedo Darwinian
theory.
This theory is support Darwin s view on transmission acquired characters to next generation. But
all acquired characters do not pass to next generation only useful character transmite to next
generation.
It supports the natural selection theory too.
Points support Darwin theory-
1)Naturally selected animals are able to reproduce and transmit Acquired character to next

2. generation.
2)Survival of fittest
3) acquired characters transfer through genetic material.
Points of psuedo Darwinian theory not support Darwin theory-
1) All acquired characters do not transmit to next generation only useful character transmite.
2) Genes for the useful character can transfer trait if present in genital pole.
3)Human races are separate species which is rejected by Darwin.
4) Language evolve from speachless pre human.which is not mentioned in Darwin theory.
Answer 2)
E) The vertibrate lineage has a longer evolutionary history.
Vertibrates evolve from their ancestors contain large number of genes and thus large size of
genome because throughout the evolutionary period many characters are acquired in terms of
separate gene. More gene results in more complex structure .