BIOB50H3 Chapter Notes - Chapter 11: Calliphoridae, Character Displacement, Intertidal Zone

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ultramarinekangaroo685

9 Mar 2013

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Competition in plants that eat animals: a case study. Charles darwin (1875) provided clear experimental evidence of carnivory by plants (cid:173) plants use a variety of mechanisms to eat animals. Venus flytrap has modified leaves that look like fanged jaws, yet attract insects with a sweet smelling nectar: other plants lack moving parts, yet still can eat animals. Tansley"s work on bedstraws is one of the first experiments ever performed on competition. Intraspecific competition can cause density-dependent reductions in population size (cid:173) Concept 1. 1 competition occurs between individuals of two species that share the use of a resource that limits their growth, survival, or. Organisms compete for resources, which are features of the environment that are required for growth, survival. Or reproduction and which can be consumed or otherwise used to the point of depletion. Organisms compete for resources such as food, water, light and space. When food is scarce, population growth rates plummet.

Related Questions

Assume that plant height and flower size in Four O'Clock plants display antogonistic phenotypes. Four O'Clock plants can be tall or short and the flowers can be large or small. Assume each trait is governed by alleles of a single gene and that each follows Mendelâs first and second laws. You start with two pure breeding strains, one that is tall with large flowers and a second that is short with small flowers. You cross these two strains to each other to generate F1 plants. You self-cross an F1 plant and grow 342 of the resulting seeds into plants. You find that 195 plants are short with large flowers, 62 plants are short with small flowers, 59 plants are tall with large flowers, and 26 plants are tall with small flowers.

Which of the following alleles are likely loss-of-function alleles? (Select 'Yes' or 'No' for each)

Yes No The allele for tall plants
Yes No The allele for short plants
Yes No The allele for small flowers
Yes No The allele for large flowers

coffeespider648

You take each of the 26 plants that are tall with small flowers, self cross each of them and examine thousands of progeny plants. Among those thousands of plants you would expect to observe plants with which phenotypes? (Select 'Yes' or 'No' for each)

Yes No Tall with large flowers
Yes No Tall with small flowers
Yes No Short with small flowers
Yes No Medium height with medium size flowers
Yes No Short with large flowers
Yes No Can't tell from the information provided

bluehare134

For the cross above- what is the phenotype of the F1 individuals?

A. Short with small flowers
B. Tall with small flowers
C. Medium height with medium size flowers
D. Short with large flowers
E.Tall with large flowers
F. Can't tell from the information provided

Please explain I'm really confused

fuchsiafish128

BIOB50H3 Chapter Notes - Chapter 11: Calliphoridae, Character Displacement, Intertidal Zone

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