Flavr savr variety of tomato is a
mutated form
somaclonal variety
transgenic crop
high yielding variety
If the decomposers become extinct, the most severally affected would be
biomagnification
damage to nitrogen fixation
non-cycling of minerals
carnivores will be starved
C.
non-cycling of minerals
Decomposers are heterotrophic organisms, mostly bacteria and fungi, which live on dead organic matter or detritus. They release different enzymes from their bodies into the dead and decaying plant and animal remains, lead to the release of simple inorganic substances thus, play an important role in the cycling of minerals.
Which of the following is false?
The energy content in a trophic level is determined by considering individuals of a species in that trophic level
The succession that occur in newly cooled lava is called primary success
Rate of succession is faster in secondary succession
Quantity of biomass in a trophic level at a particular period is called as stop-(standing) crop
Ratio between mortality and natality is called
population ratio
vital index
census ratio
density coefficient
What is not true about alleles?
Round and wrinkled form of genes are alleles of each other
Only recessive alleles expreses in hybrid
Alleles occupy same loci on homologous chromosomes
Two or more alternative forms of gene are called alleles are allelomorphs
In Mendelian monohybrid cross, phenotypic ratio in F2 is 3 :1. How many types of gametes are formed in F1 -generation?
Two types
Four types
Eight types
Only one types
Mendel enunciated
two principles of inheritance
four principles of inheritance
five principles of inheritance
three principles of inheritance
Match the following columns
Column I | Column II |
A. Zoophily | 1. Pollination by birds |
B. Ornithophily | 2. Pollination by insects |
C. Entomophily | 3. Pollination by bats |
D. Chiropterophily | 4. Pollination by animals |
A - 4; B - 1; C - 2; D - 3
A - 1; B - 2; C - 3; D - 4
A - 3; B - 2; C - 1; D - 4
A - 4; B - 2; C - 1; D - 3
The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?
Endosperm
Cotyledon
Plumule
Aleurone layer