5) The turtle heart contains only three chambers.
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External Anatomy of the Turtle Heart above and Internal Anatomy below |
6)
- Lamarkian evolution
Lamark proposed the following process to account for the evolution of species:- During their lifetimes, organisms acquire new characteristics as a result of their interactions with their environment. (For example, a giraffe's neck gets stretched as it attempts to reach the higher branches of the trees on which it feeds.)
- These modifications are somehow passed on to their offspring.
- Over many generations, these modifications accumulate, leading to large changes in physical characteristics (e.g. the originally short-necked giraffe now has a very long neck, and gives birth to equally long-necked offspring.)
http://users.ipfw.edu/abbott/314/evolution.html
7) The anther provides the sperm and the ovary provides the egg for fertilization.
http://www.enchantedlearning.com/subjects/plants/printouts/floweranatomy.shtml
8) The most specialized cells of the Xylem are called Tracheary Elements. These serve two functions, physical
support & water conduction.
http://www.botany.hawaii.edu/faculty/webb/BOT410/Xylem/Xylem-1.htm
9) Identical Twins
When one egg is fertilized by one sperm cell, and then divides and
separates, two identical cells will result. These cells will then develop
into identical twins. The DNA profiles for identical twins will be
identical. Additionally, the physical attributes of identical twins will
seem similar for traits such as hair color, hair texture, eye color, height,
and weight. They must also be of the same sex.
Fraternal Twins
When two eggs are independently fertilized by two different sperm cells, fraternal twins result. The DNA profiles for fraternal twins will not be identical, and they are just like full-siblings that are born at different times. Furthermore, if the two sperm cells originated from 2 different men then the twins would be like 2 half-siblings. Additionally, the physical attributes of fraternal twins may not seem similar for traits such as hair color, hair texture, eye color, height, and weight. They also may not be of the same sex.
10) muscular contraction in the absence of significant resistance
http://webster.com/cgi-bin/dictionary?book=Dictionary&va=isotonic&x=14&y=15