It is different types of species about .biological species concept, the phylogenetic species concept, and the morphological species (morphospecies) concept
Answer:
the answer is D. Sea ice forming
Explanation:
When ocean water freezes into ice, the salts stay behind in the liquid water. This increases the water’s salinity, making it denser. The cold, dense water sinks, forming a deep-ocean density current.
<u>Answer</u>: The carbon could go into the atmosphere through cellular respiration, it could become part of the acacia tree (biosynthesis), it could die and move to the soil, or an herbivore could eat the leaves of the acacia tree.
This answer contains <em>all </em>the possible routes for carbon.
Carbon originating from
will either return to the atmosphere due to cellular respiration or become part of the tree. The bio-synthesized carbon can either move into an herbivore through the eaten leaves, or into the soil after the tree dies.
Due to the large amounts of carbon used by for growth, trees are extremely important for the removal and fixation of atmospheric
.
Answer:
Hagfish and Lamprey
Explanation:
Vertebrates are the organism which posses vertebral column or the spinal cord in their skeleton.
The earliest vertebrates had the cranial structures or head but they lacked the vertebral columns and the jaws. These earliest vertebrates lived around 500 to 600 million years ago.
The earliest vertebrates which lacked the vertebral columns and are still alive are the Hagfish and the sea lampreys. These are considered the earliest vertebrates as they lacked the jaws.
These jawless fish are the ancestors of the cartilaginous and bony fish which later developed into amphibians and other groups of animals.
Thus, Hagfish and Lamprey are the earliest vertebrates.