The ultimate source of energy for most organisms is the Sun.
Answer:
Strong hydrologic connections among terrestrial and inland aquatic realms exist in both river floodplains and dryland ecosystems. In the evolution of river floodplains terrestrial vegetation diversifies inland aquatic habitats, providing a range of colonization options for different organisms
Explanation:
The Epithalamus partially forms the posterior roof of the diencephalon and covers the third ventricle.
- The Epithalamus function is to link the limbic system to other areas of the brain.
- The pineal gland is located in the epithalamus, a small region of the diencephalon.
- The functions of Epithalamus includes secretion of Melatonin by pineal gland which is a part of Epithalamus.
- Melatonin is also known as enzyme of darkness.
- It regulates sleep, circadian rhythms, metabolism and also increases immunity.
Thus, from the above points we can conclude that the Epithalamus forms a portion of the diencephalon's posterior roof and covers the third ventricle.
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Answer:
Option d: black 75%, white 25%
Explanation:
The cross is between a homozygous black and a heterozygous black guinea pig
Parents gen. BB x Bb
F1 generation BB Bb Bb bb
The probability of an offspring with the same phenotype as its parents is
Genotype: BB - 25% and Bb - 50%, bb-25%
Phenotype: black 75%, white 25%
Answer:
2. Gene
3. DNA
1. Pre-mRNA
4. mRNA
Explanation:
Transcription is the first step of gene expression in which a DNA molecule serves as template for the synthesis of mRNA. In the process of transcription, a Gene present on the DNA molecule is transcribed by RNA polymerase using complementary base pairing rule.
After the gene is transcribed, a pre-mRNA is formed. This mRNA is so called because it is immature. The pre-mRNA undergoes processing such as polyadenylation, splicing etc. to become a mRNA.
Hence, based on this, the order is:
Gene → DNA → pre-mRNA → mRNA
