Environment

Soil salinity is measured by

spadmanabh009 — Tue, 01 Mar 2022 05:03:00 +0000

To measure the mineral content (the total mineralisation) and salt concentration or the salinity of the soil, a instrument called the Conductivity meter is used. The conductivity meter measures the salt concentration of the soil by estimating the electrical conductivity of the soil and the water solution. Salt on the soil and the water solution …

Continue reading "Soil salinity is measured by"

Who is known as the father of paleontology?

spadmanabh009 — Mon, 28 Feb 2022 03:05:15 +0000

Paleontology is the scientific study of fossils and the expert is known as the paleontologist. The founding father of the field of paleontology is French naturalist Georges Cuvier (1769 – 1832). He also established the field of “Comparative anatomy”.

Which law of evolution states that “warm-blooded” mammals of hot and humid areas have abundant melanin pigment?

spadmanabh009 — Mon, 31 Jan 2022 14:46:49 +0000

Gloger’s Law states that warm-blooded animals (birds and mammals) have more melanin (black color pigments) in a hot humid environments such as the equator. The law was named after German zoologist Constantin Wilhelm Lambert Gloge (1803-1863). The darker skin color in animals better protects the intense solar UV radiation. The rule can be applicable at …

Continue reading "Which law of evolution states that “warm-blooded” mammals of hot and humid areas have abundant melanin pigment?"

A species inhabiting different geographical area is known as

spadmanabh009 — Thu, 06 Jan 2022 02:36:51 +0000

Allopatric species inhabit different geographical areas. The allopatric speciation arises as a result of two populations of the same species becoming isolated from each other due to geographical barriers. It is a very slow and gradual process due to which one species evolve into two different species. The geographical barrier may be due to the …

Continue reading "A species inhabiting different geographical area is known as"

The term ‘ecosystem’ was coined by :

spadmanabh009 — Fri, 31 Dec 2021 17:03:27 +0000

Ecosystem, the complex interrelationships among living organisms with their physical environment. Ecosystems comprise of living or biotic factors, such as plants, animals, and other organisms as well as nonliving or abiotic factors weather, landscape, temperature, and humidity. The term “ecosystem” was first used by British ecologist Sir Arthur George Tansley in “The use and abuse of vegetational terms …

Continue reading "The term ‘ecosystem’ was coined by :"

Obligate parasites live:

spadmanabh009 — Thu, 30 Dec 2021 16:11:19 +0000

Obligate parasites are organisms that are unable to complete their life cycle without a suitable living host. Without a living host, the obligate parasite will fail to reproduce. Obligate parasitism is seen in a wide range of organisms, such as bacteria, viruses, animals, plants, and fungi. Examples of obligate parasitism are (i) Plasmodium sp.: The genus Plasmodium contains unicellular eukaryotes such as P …

Continue reading "Obligate parasites live:"

Which important greenhouse gas, other than carbon dioxide, is being produced from the agricultural fields?

spadmanabh009 — Sun, 26 Dec 2021 14:16:28 +0000

Greenhouse gases absorb and emit solar radiant energy and cause the greenhouse effect. The primary greenhouse gases are carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4), and ozone (O3). The agricultural sector contributes about 10%–14% of global greenhouse gas emissions. The greenhouse gases that emit from agricultural activities are carbon dioxide, methane, and nitrous oxide. …

Continue reading "Which important greenhouse gas, other than carbon dioxide, is being produced from the agricultural fields?"

The 10% energy transfer law in a food chain was proposed by:

spadmanabh009 — Mon, 22 Nov 2021 15:53:53 +0000

The ten percent law of energy transfer in a food chain from one trophic level to the next was proposed by American Ecologist Raymond Laurel Lindeman (1942). The law described the ecological efficiency of energy transferred from one trophic level to the next. In the 10% law of energy transfer, Lindeman quantifies the efficiency of energy transfer between trophic levels from the …

Continue reading "The 10% energy transfer law in a food chain was proposed by:"

Which of the following groups of organisms are ecologically similar?

spadmanabh009 — Thu, 30 Sep 2021 18:13:44 +0000

Producer protists: Producer protists are unicellular. Many of them produce their foods using sunlight and CO2. Like green plants, producer protists contain chlorophyll a, chlorophyll c pigments, peridinin, and diadinoxanthin pigments. Zooxanthellae (dinoflagellates) are mostly photosynthetic protists. Some protozoa synthesized their food using chlorophyll pigments in presence of sunlight, and CO2. Example: Euglena (Euglena gracilis) an Dinobryon (Dinobryon divergens) …

Continue reading "Which of the following groups of organisms are ecologically similar?"

A coprolite is fossilized

spadmanabh009 — Mon, 27 Sep 2021 18:28:53 +0000

A coprolite is a fossilized faeces. It is also known as coprolith. Coprolites are categorized as trace fossils and give evidence about the diet of extinct animals. The term coprolite is derived from the Greek words “kopros” and “lithos” which means dung stone. Coprolites are very rare as the faecal matter decay very rapidly. The indigestible part, bones, …

Continue reading "A coprolite is fossilized"