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4 0

Mammals all have hair, but that hair can be very different from one mammal to another or even on the same mammal IS EXPAINED BELOW.

Explanation:

Medulla in a human is smaller (medullary index of less than one-third); and medulla in animals is very thick (medullary index of one-half or greater). - Cuticle in humans is imbricated; and the cuticle in animals is coronal or spinous.
Hair (and a coat of hairs, called fur or pelage) is uniquely mammalian. No other creature possesses true hair, and at least some hair is found on all mammals at some time during their lives. Hairs grow out of pits in the skin called follicles.
The hair cuticle scales in dog is imbricate, smooth, petal and wide-distant, and the medulla is continuous occupying approximately half of the hair shaft; this is different from the vacuolated structure of the hair medulla described by Mukherjee et al.
The typical mammalian hair consists of the shaft, protruding above the skin, and the root, which is sunk in a pit (follicle) beneath the skin surface. Except for a few growing cells at the base of the root, the hair is dead tissue, composed of keratin and related proteins.

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Considering that the mature sporophytes of true mosses get their nutrition from the gametophytes on which they grow, and conside

Elan Coil [88]

The true statement about the relationship between true moss sporophytes and gametophytes is: (d) Sporophytes are parasites of gametophytes.

Sporophyte is the part of the life cycle in plants where the plants are asexual and in diploid phase of their life. The plants produce spores during this stage. In vascular plants sporophyte is the dominant stage of life.

Parasites are the organisms that live inside or outside an organism and depend upon that organism for their food as well. Apart from extracting food, the parasites also provide some kind of harm to the host they live in. Sporophytes are called parasites because they directly developed from the fertilized egg in archegonia.

The given question is incomplete, the complete question is:

Considering that the mature sporophytes of true mosses get their nutrition from the gametophytes on which they grow, and considering these generations as individual plants, what is true of the relationship between true moss sporophytes and gametophytes?

a. Sporophytes are endosymbionts of gametophytes.

b. Sporophytes are mutualists of gametophytes.

c. Sporophytes are commensalist of gametophytes.

d. Sporophytes are parasites of gametophytes.

To know more about sporophyte, here

brainly.com/question/14704196

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6 0

1 year ago

Pioneer species are the first species

slamgirl [31]

B is the correct answer