TLS Online TPP Program

#Question id: 10902


P-proteins from the genus Cucurbita consist of two major proteins: PP1, the phloem filament protein, and PP2, the phloem lectin. Both PP1 and PP2 are thought to be synthesized in_______A___________and transported via the_______B_________to the_______C______, where they associate to form P-protein filaments and P-protein bodies.

#Unit 6. System Physiology – Plant
  1. A-mesophyll cells,  B-transfer cells,  C-sieve elements
  2. A-plasmodesmata,  B-symplast,  C-companion cells
  3. A-companion cells,  B-plasmodesmata,  C-sieve elements
  4. A- Ordinary companion cells,   B- transfer cells,  C- apoplast
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TLS Online TPP Program

#Question id: 3400

#Unit 11. Evolution and Behavior

Which of the following influence effective population size?

a. Sex ratio

b. variation between individuals in reproductive success

c. Fluctuations in population size

d. Small breeding group

TLS Online TPP Program

#Question id: 3401

#Unit 11. Evolution and Behavior

Genotypes of leopard frogs from a population in central Kansas were determined for a locus that encodes the enzyme malate dehydrogenase. The following numbers of genotypes were observed: What would be the expected numbers of genotypes if the population were in Hardy-Weinberg equilibrium?

TLS Online TPP Program

#Question id: 3402

#Unit 11. Evolution and Behavior

Which of the following population their genotype frequency is governed by allele frequency as per Hardy Weinberg genetic equilibrium?

Population

Genotype Frequency

I

AA= .16

Aa=.35

aa=.49

II

AA=.01

Aa=.18

aa=.81

III

AA=.25

Aa=.25

aa=.50

IV

AA=.36

Aa=.48

aa=.16

TLS Online TPP Program

#Question id: 3403

#Unit 11. Evolution and Behavior

Balancing selection is a type of natural selection that balances two or more alleles in population allows maintaining genetic diversity. Which of the following allowed to this type of selection?

A- Heterozygote has the highest level of Fitness than normal homozygote

B- If rare phenotypes are favored over common phenotypes

C- Introduction of new allele in to a population by mutation and allowed to higher fitness in individuals

D- One homozygote has a highest level of fitness than heterozygote and another homozygote

TLS Online TPP Program

#Question id: 3404

#Unit 11. Evolution and Behavior

A graph shows the frequency distribution of the character (body size). B graph shows the relation between body size and fitness, within one generation, and the third the expected change in the average for the character over many generations (if body size is inherited). Which of the following correct figure for Average size with respect to time?

TLS Online TPP Program

#Question id: 3405

#Unit 11. Evolution and Behavior

Phylogenies can be used to test whether speciation has been sympatric or allopatric. Following figure shown a new species arises by allopatric speciation, its nearest relative will usually live in a different geographic area, such as in a nearby lake. Which of the following phylogenetic tree is correct?