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kakasveta [241]
3 years ago
8

Cycadophyta is a group of plants with a small number of extant species, that is nevertheless well known from fossils from the Me

sozoic era. Living "cycads" are nearly identical to fossils. What best explains these "living fossils"?
A. Biological homology
B. Punctuated equilibria
C. Phylogenetic niche conservatism
D. Passive trends
E. Hopeful monsters
Biology
1 answer:
alisha [4.7K]3 years ago
6 0

Answer:

C. Phylogenetic niche conservatism

Explanation:

Based on the information provided within the question it can be said that the term that best explains these "living fossils" is Phylogenetic niche conservatism. This refers to the tendency that a specific species has for retaining certain traits from the ancestors. Which explains why the living "cycads" are nearly identical to fossils.

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Answer:

true

Explanation:

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Which of the following best explains why the Inuit principally relied on hunting for survival? Group of answer choices A.Tundra
Allushta [10]

Answer:

Option (A)

Explanation:

The Inuits refers to those people that live in the Arctic region, such as Greenland, the northern region of Canada, as well as Alaska. The region in which they live can be considered as tundra, which is characterized by the presence of low temperature, dry wind, shorter duration of seasons, and lack of vegetation. This type of region is found in the polar and near-polar areas and in the high altitude areas.

The climate of tundra is very cold, and there occurs the layer of permafrost in the soil, and it does not provide the essential conditions for the growth of plants. The growth of crops is hindered by the shorter season, lack of sunlight and low precipitation.

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8 0
3 years ago
Drag each tile to the correct box. Lucia is walking barefoot in her yard. She accidentally steps on a nail. How will her nervous
tekilochka [14]

Answer:

First the proprioceptors found in the tissues will capture tissue damage and the presence of a continuity solution in the skin, then these receptors will activate the afferent pathway, which is the pathway of pain, which is sensory.

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The withdrawal mechanism is a reflex that the human acquires before pain, that is why it is the muscular contraction is automatic and fast once the pain occurs.

So as a summary: 1 - the proprioceptors of the damaged tissue are activated 2- the signal of tissue damage rises as afferent to the CNS 3- the CNS responds by activating a signal that will be sent by interneuronal connections to the alpha motor neuron 4- the signal arrives as potential of action to the alpha motor neuron that innervates the muscles of the surrounding area to which it is damaged 5 - the muscles contract, generating the withdrawal of the limb.

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