Answer:
we need to focus on the 10 main threats to soil functions: soil erosion, soil organic carbon loss, nutrient imbalance, soil acidification, soil contamination, waterlogging, soil compaction, soil sealing, salinization and loss of soil biodiversity.
Explanation:
PLZ MARK BRAINLEST
vertebrae, sacrum, coccyx, temporal, sphenoid, ethmoid, zygomatic, maxilla, mandible, palatine, inferior nasal concha, and hyoid
<h2>
Answer:</h2><h2>Sclerenchyma</h2><h2 /><h2>AND </h2><h2 /><h2>Collenchyma</h2>
Explanation:
<h3>The tissue which provides support and mechanical strength to a plant or a growing organ in a plant is known as a mechanical tissue. </h3><h3>Both the ground tissues- collenchyma (living) and sclerenchyma (dead) provide maximum mechanical strength to a plant.</h3><h3>Collenchyma mainly provides mechanical strength to the growing plant parts.</h3><h3>The cell wall of collenchyma is made up of- pectin, hemicellulose, protein and cellulose. </h3><h3>These thickening materials get deposited at the corners or at the tangential walls of collenchyma cells.</h3><h3>It is a living cell which retains protoplasm even at maturity.</h3><h3>Due to the presence of hydrated pectin in the walls of collenchyma cells, they also provide elasticity to the cell.</h3><h3>Sclerenchyma is the tissue which makes the plant hard and stiff. Sclerenchyma is the supporting tissue in plants.</h3><h3>So, the correct answer is 'Sclerenchyma and Collenchyma'.</h3>
Answer:
0%
Explanation:
The cross of a pea plant with round seeds (RR) with another pea plant with wrinkled seeds (rr) is shown as under :
P RR x rr
F1 Rr Rr Rr Rr
It is clear from the cross above, all the 4 probable progenies in filial 1 (F1) generation will be heterozygous with Rr genotype. Not even a single progeny will have homozygous recessive genotype which is responsible for producing wrinkled seeds. Also, even though the genotype of the progenies will be Rr not RR yet phenotypically they all will have round seeds i.e. they will show dominant trait. The reason behind it is that one of the alleles R which is responsible for dominant trait will mask the expression of recessive allele r. So, wrinkled phenotype which is a recessive trait will not be observed in any of the progenies.
