First green plants and fungi appeared on the land during which period?

TLS Online TPP Program

#Question id: 9160

#Unit 9. Diversity of Life Forms

Generally speaking, deserts are located in places where air masses are usually ________.

TLS Online TPP Program

#Question id: 21246

#Unit 7. System Physiology – Animal

The correct sequence of events involved in phototransduction in rods and cones in response to light is:

TLS Online TPP Program

#Question id: 15153

#Unit 8. Inheritance Biology

In this problem we will explore some of the many ways that mutations in two different genes can interact to produce different Mendelian ratios. Consider a hypothetical insect species that has red eyes. Imagine mutations in two different unlinked genes that can, in certain combinations, block the formation of red eye pigment yielding mutants with white eyes. In principle, there are two different possible arrangements for two biochemical steps responsible for the formation of red eye pigment. The two genes might act in series such that a mutation in either gene would block the formation of red pigment. Alternatively, the two genes could act in parallel such that mutations in both genes would be required to block the formation of red pigment.

Further complexity arises from the possibility that mutations in either gene that lead to a block in enzymatic activity could be either dominant or recessive. If the crosses is made between a wild type insect with red eyes and a true breeding white eyed strain with mutations in both genes. Such considerations yield the Pathways in parallel with recessive mutations in both genes, determine the phenotype of the F1 progeny and the expected phenotypic ratio of red to white eyed insects in the F2.

TLS Online TPP Program

#Question id: 21126

#Unit 12. Applied Biology

The magnetic biosensors are type of ________________ based sensors?

TLS Online TPP Program

#Question id: 24650

#Unit 10. Ecological Principles

Determine the correctness of the following given; 

I-fundamental niche and 

II-realized niche

a. Actual range of an organism in nature

b. Biotic factors 

c. Abiotic factors

d. Abundant range of an organism