A bacteria culture initially contains 2500 bacteria and doubles every half hour. Find the size of the baterial population after 20 minutes. Find the size of the baterial population after 4 hours. .

A logistic model is described by the differential equation \( \frac{dP}{dt} = kP\left(1 - \frac{P}{K}\right) \). Define each parameter in this equation.

The process of spermatogeneis produces (A) sperm cells, from puberty throughout life (B) sperm cells, in cycles of 28 days (C) 2 sperm cells, from puberty to age 50 (D) 1 functional sperm cell and 3 polar bodies

4. Black bears can stand up to 7 feet tall on their hind legs * True False

The hormones directly necessary for egg cell production are (A) FSH and estrogen B) FSH and LH (C) LH and progesterone (D) estrogen and progesterone

The process of meiosis produces an end product of ___ cells, each with the ___ number of of chromosomes. (A) \( 4 / \) haploid (B) \( 2 / \) haploid (C) \( 4 / \) diploid (D) \( 2 / \) diploid