according to darwin, why do modern giraffes have long necks?
a
giraffes have always had long necks like the modern ones.

b
earlier short-necked giraffes stretched their necks over a long period of time.

c
ancient giraffes developed short necks and pass this trait to their offspring.

d
giraffes born with longer necks would survive better in an environment with tall tr

b

Explanation:

They couldn't reach the trees and the stretching made their neck grow.

C - according to Darwin, giraffes with longer necks had the advantage in the environment and survived, reproduced, and passed this trait on to offspring.

all answers true and false

explanation:

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."