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Aloiza [94]
2 years ago
12

Convection currents in Earth's mantle are believed to be responsible for​

Biology
2 answers:
ololo11 [35]2 years ago
6 0

Answer:

plate tectonics

Explanation:

luda_lava [24]2 years ago
6 0

Answer:

Tectonic plate movements

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Describe the characteristics and classification of seedless vascular and nonvascular plants
Lady bird [3.3K]

Answer:

Vascular plants, also known as tracheophytes, are plants found on land that have lignified tissues for conducting water and minerals throughout the body of the plant.

1. These lignified tissues are also called vascular tissue and consist of water-conducting xylem tissue and food-conducting phloem tissue.

2. Vascular tissue forms a central column, also called stele, through the plant axis for the transport of different substances.

3. Vascular plants are said to have a true stem, leaves, and roots due to the presence of vascular tissues.

4. The root is a true root that enables the plant to anchor onto the soil and gets nutrients from it.

5. The leaves are broad and have stomata that work for gas exchange and support transpiration.

6. The stem of vascular plants is multilayered with vascular tissue that helps in the protection and conduction of food and water.

7. The arrangement of these issues might be different in a different group of plants as it depends on the pattern of division of cells.

8. The xylem is composed of non-living matter, tracheids, and vesicles, hardened by lignin that provides a stiff structure to the tissue. 9. The phloem, on the other hand, contains living sieve elements that are not lignified.

10. Vascular plants are capable of surviving on land due to their ability to transport food, water, and mineral to different parts of the plant by creating pressure through the tissues.

11. Besides, they also have several modifications that facilitate their survival on land.

12. Another essential characteristic of vascular plants is that the principal generation phase in these plants is the sporophytic phase where they produce diploid spores.

13. Vascular plants are tall and large in size compared to the non-vascular plants because of their ability to transport necessary substances to all parts of the body via vascular tissue.

14. It is believed that vascular plants are a more evolved version of non-vascular plants and thus came later in the evolutionary history.

15. Vascular plants are divided into two groups; non-seed plants or lower vascular plants or cryptograms and seed plants or higher vascular plants or phanerogams.

16. The lower vascular plants include plants like ferns that although are adapted to survive on land still have some characteristics of their aquatic ancestry. These plants belong to the group Pteridophyta.

17. The higher vascular plants are numerous and extremely diverse and are further divided into different subgroups.

18.Some examples of vascular plants include maize, mustard, rose, cycad, ferns, clubmosses, grasses, etc.

6 0
3 years ago
If a rat births several offspring after fertilization, why will these offspring NOT be genetically identical to the mother
Nataly_w [17]

Answer: The offspring will not be genetically identical to the mother because the process of mitosis mixes chromosomes frome the mom and dad.

7 0
2 years ago
For class 5 f. Why are green plants called producers?​
kifflom [539]

Answer:

Green plants are called producers because they manufacture their own food with the aid of photosynthesis.

8 0
3 years ago
Read 2 more answers
During the process of ________, an existing tissue is replaced by bone.
Pachacha [2.7K]
During the process of ossification, an existing tissue is replaced by bone.
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3 years ago
Mutations in ubiquitin lead to malfunction of what organelle in ALS that leads to buildup of mis-folded proteins?
sergiy2304 [10]

Answer:

Mitochondria.

Explanation:

Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder in which the neuron died due to mutation in superoxide dismutase 1 gene. This disease is also known as Lou Gehrig's disease.

Mitochondria structure is disorganized in ALS. The ubiquitin protein mutation leads to the malfunctioning of mitochondria and misfolded proteins are made in the mitochondria.

Thus, the correct answer is option (a).

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3 years ago
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