Answer:
demospongi and sclerospongi are two classes of sponge
Explanation:
Sponges have/are:
Body with cells arranged around pores, canals and chambers for the passage of water.
Skeletal structure of spicules and/or spongin.
All aquatic, mainly marine.
Filter feeders.
Sessile adults; sessile, planktonic larvae.
Sexual and asexual reproduction.
Gas exchange is by diffusion.
The answer to this question would be: Iron
Iron or Fe is the minerals that used in hemoglobin that binds oxygen or carbon dioxide in red blood cells. Deficiency in iron can lead into lower hemoglobin, thus lowering the oxygen delivery to the body tissue. Iron-rich food would be red meat like chicken or beef and spinach.
Answer:
C. the nuclei
Explanation:
All of our dna is stored in the nuclei.
Answer: I believe it's Neutral 7
Explanation:
Sorry if i'm wrong
Have a nice day
Answer:
The correct answer is - to produce more pollen grains.
Explanation:
The maturity of the Pinus sp. male cones takes place before the female cones which are due to ensure that there are more pollen grains available. The higher the number of pollen grains is better for surrounding the female cones when it matures.
This helps in pollination to be species-specific rather than pollinate by any other flower. This feature of early maturation result in easy pollination of the Pinus species.
