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Pachacha [2.7K]
3 years ago
11

Which type of blood vessel normally contains valves to keep the blood flowing in One Direction

Biology
1 answer:
Bogdan [553]3 years ago
5 0

B) Viens

The veins have valves to keep the blood pumping out and not coming back in the heart.

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Although animals CANNOT digest cellulose directly, some animals have a symbiotic relationship with ________ living in the small
Lesechka [4]

Answer: microorganisms

Explanation: No animal has the ability to digest cellulose directly.

Most animals such as horses and termites cannot directly digest cellulose. The animals have a symbiotic relationship with bacteria in the intestinal tract. The symbiotic bacteria acts on the cellulose and secrets the necessary enzymes (cellulase) to digest cellulose in the intestinal tract. An example of such microorganism in a symbiotic relationship with animals that facilitates the digestion of cellulose is Trichonympha

7 0
4 years ago
Can someone write a paragraph explaining this drawing of thermal energy. Please dont use google, I'll mark brainiest and give ex
aliina [53]
Radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
7 0
3 years ago
Some estimates show that the world will have to increase global agricultural production by sixty percent in order to meet rising
irina [24]

Answer: <u>Genetic Modification of crop plants.</u>

Explanation:

Genetic modification alters the genome of an organisms through the use of biotechnological tools and advancements in molecular biology. Usually, DNA is swapped among organisms, and between species;  this is called transgenes. These altered plants are usually called transgenic organisms.

Some plants can be modified in several ways to meet global food security needs. These include:

-drought tolerance-plants grow in arid conditions with minimal water

-increased yield- plants produce more crop per input

3 0
3 years ago
Animal tissues develop from embryonic germ layers. Triploblastic animals have three germ layers (ectoderm, mesoderm, and endoder
Leno4ka [110]

True statements are

A diploblast has no mesoderm.

A pseudocoelom has the same functions as a true coelom.

In a coelomate, the tissue lining the inner side of the body cavity arises from the same germ layer as the tissue lining the outer side of the body cavity.

Explanation:

Diploblastic animals (radially symmetric animals like jelly fish, sea anemone) has only two layers – the endoderm and the ectoderm. It does not have mesoderm germ layer. Diploblastic animals are formed from the embryonic process called gastrulation from a blastula cells.

A true coelom and pseudocoelom may differ in their structure or location but their main function is the same. Since both are fluid-filled cavities, they act as hydrostatic skeleton disseminating extra pressure via the body to protect the internal organs and minimize damage.

Each germ layer gives rise to tissues pertaining to a particular organ or organ system. Like the mesoderm provides for muscles, nervous system and the endoderm gives rise to gastrointestinal organs, lungs etc. So the tissues lining outside and inside the body cavity will arise from the same germ layer.

4 0
3 years ago
This polysaccharide is the most abundant organic compound on
Mkey [24]

Answer:b. cellulose; cell walls of plants

Explanation: polysaccharides are polymers of monossacharides.they are the most abundant organic substance.it is found in the cell walls of plants . cellulose is a linear polymer of glucose residues.cellulose is an important component in the diet of herbivores and omnivores.they do not produce the cellulase enzyme for digesting cellulose.as a result,they depend on symbiotic relationship with bacteria and protozoa found in their stomach to produce cellulase.

3 0
3 years ago
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