Breaking down dead plant materials , creates humus, natural fertilizer
Answer: Option A and B.
Organ system and tissues.
Explanation:
Earthworm is a segmented worm that belong to the phylum annelids. Earthworm has a close circulatory system just as human beings which means their blood circulate through a closed network of vessels which are connective tissues. Earthworm has a structure of 5 hearts and they are called aortic arches which are organ systems. These pump blood into network of vessels and it's flow through the body. From there, the blood move to dorsal blood vessel which send blood to the front of the Earthworm, then to the ventral blood vessel which send blood to the posterior. At the intestines, there are lateral vessels which carry nutrients away from the gut and to the body.
In beta-minus decay, a negative electron is emitted which produces a daughter nucleus of one higher atomic number but mass number remains the same<span>.
</span><span>For example:
The decay of the uranium product produces thorium-234 into protactinium -234.
</span>I hope it helped.
Answer
At week 5-6 of gestation, the baby’s heart starts beating.
Explanation
Fertilization occurs in week 3 followed by implantation in week 4.In week 5 the levels of hormones increases with formation of the baby’s heart and circulation system. In week 6, the neutral tube closes followed by development of structures necessary to form eyes and ears. The head of the baby develops at week 7 followed by nose in week 8 and toes in week 9.
A. Genesis as well as C. Traits that can both be passed on