When a cell is in equilibrium with its environment, which of the following processes occurs for substances that can diffuse through the plasma membrane?

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#Question id: 4736

#SCPH06 I Botany

A snapdragon plant that bred true for white petals was crossed to a plant that bred true for purple petals, and all the F1 had white petals. The F1 was selfed. Among the F2, three phenotypes were observed in the following numbers

white                              240

solid-purple                    61

spotted-purple                19

Total                              320

Which of the following reason to deviation f2 phenotype ratio ?

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#Question id: 4719

#SCPH12 I Genetics

When a trait exhibits complete co-dominance rather than complete dominance, a cross between heterozygote results deviation of following;

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#Question id: 10412

#SCPH06 I Botany

Red and far-red lights are perceived by plants through various photoreceptors including phytochromes. The red/far-red reversibility of seed germination was due to the-

a) photoreversibility of phytochrome

b) presence of red and far-red light at different fluence rate

c) Conversion of Pr to Pfr form through the effect of red light

d) equal proportion of red and far red light at same fluence rate

Which of the following combinations is correct?

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#Question id: 8937

#SCPH06 I Botany

During metamorphosis, echinoderms undergo a transformation from motile larvae to a sedentary (or sometimes sessile) existence as adults. What differentiates echinoderm adults, but not their larvae? Adults should

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#Question id: 6954

#I Life Science/ Life Sciences Group – I-V

Between fertilization and the first cleavage division, actin filaments pull the cytoplasm of the frog egg toward the point of sperm entry in a process called: