The correct answer to this question is this one: "sporozoans lack locomotor organs"
The feature that differentiates sporozoans from the other phyla of protozoans is that sporozoans lack locomotor organs. Sporozoans are a strictly parasitic protozoan that are usually immobile.
Answer:
The cell membrane is composed mainly of phospholipids, which consist of fatty acids and alcohol. The phospholipids in the cell membrane are arranged in two layers, called a phospholipid bilayer.
Explanation:
Answer:
Variation can be acted on by natural selection.
Explanation:
Variation are the difference that exist in the organism in terms of the body size and can be acted upon by natural selection.
Natural selection could act on the owl body size, favor the selection of owl with small body size especially when resources available are limited and can only sustain small number of individuals leading to availability of owl with small body size in such area and a gradual reduction in the number of owl with large body size.
Animals with a three-chambered heart would include Amphibians.
- Amphibians have three-chambered which comprises of two Atria and one ventricle. Examples of Amphibians include Frog, Toads, Salamanders.
- In Amphibians heart blood from the single ventricle travels to the lungs, skin, and body, where it is oxygenated. Before being pumped out of the heart, deoxygenated and oxygenated blood are mixed in the ventricle.
- This is because the Amphibians have low rate of metabolism and thus requires less oxygen for their metabolism.
- As a result heart's load to deliver oxygenated blood to body is lowered.
Thus, from the above pointers we can conclude that only Amphibians from the option have three-chambered heart.
Learn more about Amphibians:
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<span>Colostrum
is replaced by transitional milk in about 2 to 4 days after birth. This milk
contains high levels of lactose, fat, vitamins and more calories than the
colostrum. Mature milk replaces the transitional milk and begins to appear near
the end of the second week after childbirth. Mature milk contains more water than
transitional milk.</span>
