Which group of organisms survived mass extinctions that marked the ends of both the Paleozoic era and Mesozoic era?

1 answer:

8 0

The group of organisms that survived mass extinctions that marked the ends of both the Paleozoic Era and the Mesozoic Era is the gastropods. Gastropods are one of the most diverse groups of animals, both in form, habitat, and habit. They are by far the largest group of molluscs, they include snails and slugs of all kinds and all sizes from microscopic to Achatina achatina.

You might be interested in

In Experiment 5, how did the shape of the epidermal cells in the outer skin surface slide compare to the shape of the epidermal

Phoenix [80]

Answer:

The correct answer is B. The cells in the outer skin surface appeared flat, whereas the cells in the cross section were not flat.

Explanation:

The epidermis is made up of five cell layers, which have different functions: Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.

Stratum basale is the innermost germinative, single, basal layer of the epidermis composed of basal cuboidal-shaped cells. These cells are the precursor of keratinocytes, this is why this layer is also called germinativum. In this basal layer, there are also Merkel cells as well as melanocytes.

Stratum spinosum refers to the keratinocytes which produce keratin.

Stratum granulosum, this is the layer where keratinization begins. Cells produce hard granules that change to keratin and lipids as they ascend.

Stratum lucidum is conformed of densely compressed cells, which begins to flatten and appear indistinguishable between each other.

Stratum corneum is the most external layer, composed of dead, flattened cells which are released regularly in a process known as desquamation.

8 0

3 years ago

Explain how the cancer cell cycle is different from a normal cell cycle

blsea [12.9K]

Cancer cells multiply rapidly and normal cells don't.

4 0

3 years ago

The ______ system senses changes in the internal and external environment so that the body can adapt to the changes.

meriva

The answer is either endorcrine or reporudctive,

4 0

4 years ago

Read 2 more answers

Pseudomonas A. are resistant to many disinfectants and antimicrobials.B. are mostly harmless except for the opportunistic P. aer

OLga [1]

Answer:

The best answer is option E.

Explanation:

Pseudomonas are gram-negative bacteria which is present almost everywhere air, soil, water and even indoors. These gammaproteobacteria are also present in some of the healthy people.

Pseudomonas is resistance to many antimicrobials and disinfectants. These bacteria are generally harmless but some opportunistic species like P. aeruginosa are infectious.

Thus, the correct answer is option E.

6 0

4 years ago

What type of organic compound is DNA

serg [7]

Nucleic Acid which is composed of sugar,phosphate backbones, and it has nitrogenous bases

5 0

3 years ago

Read 2 more answers