The food chain starts with primary producers like plants, consumed by primary consumers (herbivores). They in turn are eaten by secondary consumers (usually carnivores), and so on up the chain to the apex consumers. Decomposers break down dead material at all levels, returning nutrients to the ecosystem.
Organisms residing at various levels of the trophic structure in an ecosystem have different food sources. At the base of the food chain, we have primary producers, typically photosynthetic organisms like plants and phytoplankton. These organisms make their own food using sunlight.
The primary consumers are ordinarily herbivores that directly consume the primary producers. Following them are the secondary consumers, usually carnivores that eat the primary consumers. Similarly, tertiary consumers are carnivores that consume other carnivores.
Further up the food chain we have the higher-level consumers who feed on the lower trophic levels. At the top of the food chain are the apex consumers. Meanwhile, decomposers break down dead producers and consumers, returning nutrients to the soil.
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a. Amphibians and birds share a more recent common evolutionary ancestor than sharks and birds.
b. Birds and sharks do not share a common evolutionary ancestor.
c. Having a bony skeleton did not provide an evolutionary advantage to sharks or ray-finned fish.
d. Rabbits and primates diverged more recently than crocodiles and birds.
Answer: a. Amphibians and birds share a more recent common evolutionary ancestor than sharks and birds.
Explanation:
A cladogram is a diagrammatic representation of the phylogenetic relationship of recently evolved species with their common ancestors. The relationship is defined on the basis of genetic, molecular, morphological make up of the organisms. The node in the cladogram defines a divergence or difference between the two taxon.
Birds and amphibians share a more recent common ancestor than shark and birds because they can be seen lying closer at the terminal ends of the cladogram.
B. 1 km/1000 m
C. 100 m/1 km
D. 1 km/100 m
Answer: False
Explanation:
Absorption refers to the process by which substances, such as nutrients and drugs, move from the GI tract into the bloodstream or lymphatic system.
The term 'absorption' in biology refers to the process of substances moving from the gastrointestinal (GI) tract into the enterocytes, the cells that line the inner region of the GI tract. This process allows nutrients to be transported from the digestive system into the bloodstream.
True, the term absorption in the biological context often refers to the process of substances moving from the gastrointestinal (GI) tract into the enterocytes. The enterocytes are the main cells found in the inner lining of the GI tract, and they are responsible for the uptake of nutrients from the lumen of the GI tract into the bloodstream. This occurs via various mechanisms including passive diffusion, active transport, and endocytosis.
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Firstwe have to know that sporozoans are a strictly parasitic protozoanthat are usually immobile. Of the following features the one thatdifferentiates protozoans from the other phyla of protozoa is:
Answer:A) Sporozoans lack locomotor organs.
Ihope this helps, Regards.
visceral mass
water vascular system
Answer:
visceral mass
Explanation: