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kupik [55]
3 years ago
7

This is the repeating structural unit that forms RNA and DNA

Biology
1 answer:
Andrej [43]3 years ago
3 0

Answer:

Nucleotide(s)

Explanation:

Both DNA and RNA are made of long chains of nucleotides. In DNA, there is adenine, cytosine, guanine, and thymine. In RNA, there is adenine, cytosine, guanine, and uracil.

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Before it can be utilized nitrogen must be converted into some other form through two processes, identify and explain these two
Mrac [35]

Answer:

The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.

4 0
2 years ago
The Cenozoic Era is known as the "Age of __".
NeTakaya

Answer:

A. Mammals the Cenozoic Era gave rise to the mammals to evolve.

8 0
3 years ago
Whales, humans, lizards, and birds each have forelimbs that are adapted for different functions, including swimming, using tools
Elis [28]

Answer:

A. These homologous structures indicate that these four organisms all share a common ancestor.

Explanation:

Homologous structures mean the organs will have similar structure, but not necessarily function (human arm vs whale's flipper). While analogous structures are similar in function but not structure (wings of an airplane vs wings of a bird). Since the question states that they are similar in skeletal structure, we know they must be homologous structures, thereby eliminating B and C. D is not a choice because the question does not provide anything about the order of evolution. Therefore the answer is A. These homologous structures indicate that these four organisms all share a common ancestor.

7 0
2 years ago
3.How did the forensic anthropologists use military records to help identify some victims?
xxMikexx [17]
They use the military records to find their DNA
8 0
3 years ago
Ian waterman was able to sense pain and temperature because his _____ pathway was intact, but could not feel touch and limb posi
ANEK [815]
<span>Ian Waterman was able to sense pain and temperature because his spinothalamic pathway was intact, but could not feel touch and limb position because of damage to his lemniscus pathway. </span>

The lateral spinothalamic tract is a sensory pathway which carries sensory information like pain and temperature to the brain, across the thalamus. Free nerve endings which are located in the peripheral tissues are sensitive to cell damage. Those are primary neurons and they pass the sensory signal. Primary neurons synapse with secondary which are located in the spinal cord (white matter). These secondary neurons will ascend through the brainstem, medulla oblongata, pons and midbrain, until synapsing in the ventroposteriorlateral (VPL) nucleus of the thalamus. From the thalamus, the information is sent to cortex (somatosensory cortex).

Posterior column-medial lemniscus pathway is ascending spinal tract, carrying sensory information to the brain (sensory pathway). It conducts localized sensations of fine touch, vibration and proprioception (position sense) from the skin and extremities (muscles) to the central nervous system (cerebral cortex).

8 0
2 years ago
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