Station 3! pls!

1. animals with backbones belong to the phylum.

a. cordate
b. echinoderm
c. athropod
d. mollusk

2. jellyfish and coral belong to the same phylum as

a. snails
b. sponges
c. sea anemones
d. fish

3. an animal belonging to the phylum athropoda is a

a. tapeworm
b. lobster
c. squid
d. slug

4. is the class of athropods which have 8 legs.

a. arachnid
b. insect
c. centipede
d. cephalopod

Arachnid (4)

Explanation:

Note: I am not into this type of science at all, but I try.

I can answer number 4 for you: Arachnid. Arachinds involve animals like spiders, which have 8 legs.

Again, I haven't really gotten into this science yet, it POSSIBLY may be wrong.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.