Choose the correct statements regarding frog's anatomy:
A. Hepatic portal system is the special venous connection between liver and intestine.
B. There are twelve pairs of cranial nerves arising from the brain.
C. The ureters and oviducts open separately into the cloaca in female frogs.
D. Hind-brain consists of cerebellum, medulla oblongata and optic lobes.
E. Sinus venosus joins the right atrium of heart.
Choose the correct answer from the options given below:
A, B and C only
B and D only
B and C only
A, C and E only
$$ \text { Match List I with List II related to embryonic development at various months of pregnancy: } $$
| $$ \text { List I } $$ |
$$ \text { List II } $$ |
||
|---|---|---|---|
| A. | The foetus movement starts and hair appears on the head | I. | 24 weeks of pregnancy |
| B. | The foetus develops limbs and digits | II. | 20 weeks of pregnancy |
| C. | The foetus develops external genital organs | III. | 8 weeks of pregnancy |
| D. | The foetus body is covered with fine hair; eyelids separate and eyelashes are formed | IV. | 12 weeks of pregnancy |
Choose the correct answer from the options given below:
A-IV, B-II, C-III, D-I
A-II, B-III, C-IV, D-I
A-III, B-II, C-IV, D-I
A-II, B-IV, C-III, D-I
In a population of a grasshopper species, the chromosome number of some members is 23 and some other members possess 24 chromosomes. The 23 and 24 chromosome-bearing members in this species are $\_\_\_\_$ .
females and males, respectively
all males
males and females, respectively
all females
In which animal do haploid cells divide mitotically to produce gametes?
Male honeybees
Male earthworms
Male frogs
Male grasshoppers
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