Answer:
Neogene period is almost 31% of Cenozoic area.
Explanation:
Cenozoic era exists between 66 mya and zero mya. However, Neogene period existed between 23 mya to 2.6 mya. The difference is 20.4 mya.
To calculate the percent of neogene,
= (20.4/66) x 100
= 30.9%
Therefore, Neogene was approximately 31% of total Cenozoic era.
Answer:
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Explanation:
If we cross Plant A (pink flowers) with Plant B (white flowers) of the same species, the resulting cross will give equal number (1:1 ratio) of the both colors. This means that the crossed plants had Plant A: Pp (heterozygous) and Plant B: pp (recessive homozygous) genotype.
P: Pp x pp
F1: Pp Pp pp pp
The scientist should compare the anatomies of the fossil and present day dragon fly to determine the relation between the two.
Explanation:
- Diet is a common factor between many species,i.e. Different animals can have same died for example there are several grass eating species so this will not establish a close relation between the two.
- A single habitat can be occupied by different species , for example a grassland can be the habitat of lion, zebra , various insects etc. Secondly, getting a clear idea about the habitat of a fossil specimen is difficult and can be hypothetical. Thus, this is not a criteria to be compared.
- Different animal can have same predator, for example, a zebra, a deer and a nil gai have lion as the predator. Again determine the predator of a fossil specimen is very difficult and might lead to a hypothetical conclusion. Thus predators are also not factors of comparison here.
- The Anatomy of an organism is quite similar to its ancestor, the structural plan of the body can easily be compared. For example the anatomical features of man and apes are closely established. Thus, Comparing the anatomy will determine the closeness of the give species.
Answer:
Carley has become operantly conditioned.
Explanation:
Operant conditioning can be described as a method of learning which focuses on the rewards or punishments that will be given in course for an action. As Carley has learned that whenever she wants a rush of natural adrenaline, she needs to swim forty laps in the pool, she considers it to be a reward. Such type of practices behaviour demonstrates operant conditioning.
