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umka21 [38]
3 years ago
11

What structures do sponges possess that may prevent other animals from eating them?

Biology
2 answers:
Nitella [24]3 years ago
8 0

The answer is spicules. These sharp-pointed structures are formed from calcium carbonate skeleton of the organisms.  They can also be formed from silica. They can be big (megascleres), or microscopic (microscleres). Also dependent on the number of axis on the spicules, they are classified as monoaxon, triaxon or polyaxon.


AlladinOne [14]3 years ago
6 0
Sponges have spicules, small spiky elements, in their bodies,  made out of different minerals in different sponge species that serve as protection against predators.
Since sponges have no organized tissues, just layers of cells, these spicules stand between two layers of sponge cells.
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What behavioural adaptation does a desert fox have to help it survive in hot places
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1. Their large ears help dissipate excess body heat on hot days in the desert. 2. The fennec fox seems to be the only carnivore living in the Sahara Desert able to survive without free water. Their kidneys are adapted to restrict water loss, their extensive burrowing may cause the formation of dew, which can then be consumed, and they will receive moisture from the food that they eat. 3. Their burrowing and nocturnal lifestyle helps restrict water loss. 4. Their thick fur helps insulate them from the cold desert nights. 5. Their sandy fur helps to reflect heat, and also provides excellent camouflage. 6. Fennec foxes also have thick fur on the soles of their feet, which insulate against the hot sand of the desert. This extra fur on the soles of their feet also affords them excellent traction in the loose sand.
7 0
3 years ago
Name and describe 3 major characteristics of vascular plants?
inessss [21]

Answer:

Roots. Roots are simple tissues that are derived from the stem of the plant.

Xylem. The xylem is tissue that transports water throughout the plant.

Phloem. The phloem is the plant's food transportation system.

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8 0
3 years ago
This morning you awoke to the wonderful smell of cinnamon rolls cooking. Your roommate offers you one of these fresh baked delic
yaroslaw [1]

Answer:

Ego-depletion.

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Ego-depletion may be defined as the idea used to self control upon the mental resources that can be used by the individual. Individual with low mental ability has low self control.

The individual that suffers from ego-depletion has impair ability to control themselves for the later time. This might even cause the hindering in the self control as well. Self control is important for an individual even at personal levels. The ego-depletion might create hard time for the restraint.

Thus, the answer is ego-depletion.

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Which of the prey's cells are most likely affected by the poison
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Muscle cells are most likely affected by the poison.

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Hershey and Chase used radioactive isotopes to label different parts of the phage. They grew one batch of phage in the presence
AlekseyPX

The sulphur would lable the capsule and the phosphorous the nucleic acid.

<h3><u>Explanation</u>:</h3>

Hershey and Chase experiment included growing of the pages in two batches, one in presence of 35S and other in presence of 32P. They then infected bacterial cells with these phages, cleaned them and then centrifuge the cells to isolate the marked elements in bacterial cells.

This was done to isolate which part of the phage is actually infective. Sulphur being a part of the proteins will mark the capsule whereas DNA having the phosphate bridges will be marked by 32P.

5 0
3 years ago
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