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kotegsom [21]
3 years ago
8

What is the significance of an eyespot in the cell of Euglena?

Biology
1 answer:
anzhelika [568]3 years ago
6 0
The significance of the eye spot of the Euglena cells is a light receptor.
The light receptor allows the light to enter and orient the cell to move towards the light or to move away. The eye spot is also known as the stigma.

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List and describe the four types of micro-organisms that cause disease
kherson [118]
Virus: an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.
Bacteria: a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some which can cause disease.
Fungi/fungus: any of a group of spore-producing organisms feeding on organic matter, including molds, yeast, mushrooms, and toadstools.
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7 0
3 years ago
Plants adapted to the desiccating effects of the land environment and increased ultraviolet radiation with the evolution of ____
MrRissso [65]

Answer:

e. ​cutin

Explanation:

Plant exhibit many variations to withstand the temperature variations, desiccation and increased UV exposure which are some of the factors associated with land habitat. Cutin is a waxy substance that is found in the outer walls of the epidermal cells of plants. Cuticle in plants serves to make the outer most covering of aerial parts of the leaves and non-woody stem of herbaceous plants. The cuticle is made of cutin.

Cutin serves to protect the plant’s aerial surfaces from excess water loss. It also filters the excess UV light and thereby protects the underlying plant parts. The thickness of the cuticle varies in different plants depending upon the environmental conditions. The leaves of plants adapted to hot, dry climates have thick cuticles. The thickness of the cutin layer also varies in different parts of a plant. For example, the upper epidermis of leaf generally has a thicker cuticle than the shaded and relatively cooler lower epidermis.

3 0
3 years ago
When a plant encounters stressful hot and dry conditions, the?
Tasya [4]
The plant goes into shock
7 0
3 years ago
Which landform is created when two continental plates are colliding?
Nutka1998 [239]

Answer:

C.rift valley

Explanation:

7 0
3 years ago
Which descriptions accurately apply to vascular plants? Check all that apply.
atroni [7]

Answer: have true roots, stems, and leaves

may have seeds

may not have seeds

have vascular tissue

Explanation:

some vascular plants have seeds and some do not.

they have vascular tissue such as xylem and phloem

they have true roots, stems, and leaves

6 0
3 years ago
Read 2 more answers
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