All animals perceive light using different forms of a pigment called retinal

Indicate whether the statement is true or false.


T

Biology & Microbiology

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Which evolutionary change was not one of the four primary milestones contributing to the evolution of the seed?

a. the proliferation of flagellated sperm b. the emergence of sexually different spores c. the protection of female spores and gametophytes within the body of the sporophyte d. the trend toward reduced gametophytes e. the evolution of the ovule

Biology & Microbiology

Describe three things that limit travel between stars

What will be an ideal response?

Biology & Microbiology

_____ describes small scale genetic changes that happen in populations

1.Macroevolution 2.Microevolution 3.Acquired characteristics 4.Natural selection 5.Artificial Selection

Biology & Microbiology

As regards the immune system, older people are more likely to develop

a. common colds. b. warts. c. stronger immune responses. d. an increased risk of AIDS. e. autoimmune diseases.

Biology & Microbiology