The phylum Mollusca includes the: Oyster, Clam, Snail,<span> chiton</span><span> O</span>ctopus<span>, and Squid</span>.<span> The main part of the body is enclosed in a fold of tissue called the mantle. They have bilateral symmetry. Many kinds of mollusks are covered by a shell.
Let me know if you need more explanations! </span><span />
Hmm I'm thinking D. Sam could have picked up another virus at school as well as catching the same one from Ana again, so Ana could get sick again with either virus.
Physical anthropologist John Hawks and colleagues suggest that evolution is speeding up as population sizes are being continued to mushroom and new mutations which are endorsed.
Human population increased rapidly. The increase began those days of upper Paleolithic which is documented by archaeological evidence.
Answer:
22 map units
Explanation:
Linked genes may be defined as the genes present on the same chromosomes and they are inherited to the next progeny. The linked genes produces the recombinant progeny.
Distance between the linked gene = No. of recombinants / total number × 100.
Here the parental are 198 Tall Yellow, 192 Short Green.
The recombinant progeny are 54 Tall Green, and 56 Short Yellow.
Distance = 
Distance = 
Distance = 22 map units.
So, the distance between the genes are 22 map units.
As energy is transferred through an ecosystem, not all trophic levels receive the same amount. The marine ecosystem consists of primary producers like phytoplanktons; primary consumers like zooplanktons, krill; secondary consumers like leopard seals; and tertiary consumers like killer whales.
Explanation:
In an oceanic or marine ecosystem, the leopard seals are secondary consumers. They basically feed on the primary consumers. They are eaten up by the tertiary consumers. The prey animals of leopard seal includes primary consumers like small fishes, zooplanktons, coral polyps, krill etc. The energy level in the food web increases in a top to down pattern. The producers which occupy the base level will be with high energy and going up the food web, the energy will decrease subsequently. Leopard seals are huge and eat
