Some given characteristics of the two types of sieve elements in seed plants such as Sieve tube elements and Sieve cells. Find out the  true characteristics of sieve tube elements from the given statements;

i) Found in angiosperms

ii) Sieve plate pores are open channels

iii) Albuminous cells sometimes function as companion cells

iv) P-protein is present in all eudicots and many monocots

v) There are no sieve plates; all sieve areas are similar

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#Question id: 19025

#Unit 8. Inheritance Biology

Consider the ABO “blood type” gene. This single gene has three alleles called A, B, and O. There are four resultant “blood types” (phenotypic classes), as follows: C

                         

Assume Hardy-Weinberg equilibrium,  the frequencies of the A and B alleles are 0.26 and 0.07, respectively. You now examine the ABO blood types in a new population. You observe that the A, B, and O blood types all have equal frequencies in this population. What are the frequencies of the A and O alleles in this population?

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#Question id: 24558

#Unit 4. Cell Communication and Cell Signaling

Spreading venom into the body of patient by snake biting, give antiserum of the patient  for therapy, this process of immunization defined as ;

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#Question id: 12039

#Unit 7. System Physiology – Animal

Which of the following food substances requires chewing for digestion?

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#Question id: 12654

#Unit 6. System Physiology – Plant

unconjugated JA is hormonally active, many JA responses require activation of the hormone for optimal activity by conversion into an amino acid conjugate, such as

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#Question id: 13220

#Unit 6. System Physiology – Plant

The symplast consists of the entire network of cell cytoplasm interconnected by