Exam 5 Flashcards
(23 cards)
What are the advantages of asexual reproduction?
asexual reproduction maintains a stable environment
what are the 3 layers form in gastrulation?
ectoderm-outer
mesoderm-middle
endoderm-inner
sperm is made in where in the male reproductive system?
testes- seminiferous tubules
prostate surrounds what tube
urethra
ovaries are how big
almond
fertilization usually occurs in what area of the female reproductive system
oviduct
sperm must meet the egg how many hours after ovulation to allow fertilization to occur
12
why does the uterus thicken during menstrual cycle
uterine lining thickens in preparation for pregnancy
corpus luctuem helps the pregnancy succeed because
forms and secretes estrogen and progesterone
menopause starts at what age
around 51
what happens to the egg after the sperm penetration the egg to allow no more sperm to enter
egg changes so that other sperm can penetrate the egg
HPV causes what symptoms
most frequent is no symptoms at all; warts of various kinds and in various areas
what day does the blastocyst implant into the uterine wall after fertilization
6th day
how many extraembryonic membranes develop during pregnancy
4
neurocord and notocord form during what week
week 4
full term of a baby is how many weeks
38
what are some things women should avoid while pregnant
alcohol, caffeine, smoking, some medication, addictive drugs
why is partial birth abortion considered more cruel
Partial birth abortion is considered more cruel because the abortionist starts to deliver the baby and then kills it. This can happen because partial abortions happen within the second and third trimester, meaning that the baby is almost fully developed
Why do some animals have large amounts of offspring and others have low amounts of offspring (relates to survivorship patterns)?
Some animals have large amounts of offspring and others have low amounts of offspring because some offspring just don’t have very good chances of surviving. If an animal only has one offspring, there must be a good survival rate for that offspring
Why is carrying capacity important for US Fish and Wildlife to know
The resources in any given environment can support only a certain quantity of wildlife
How do you think we should handle current problem with the human population growth and preparing for the future (crops ideas, reproduction laws, etc)
I definitely don’t feel like there should be reproductive laws, but I think that if people were educated on the state of the world currently, more people might choose not to have so many kids. One of the most basic things would be to eliminate food waste. Another way would be to increase urban agriculture. A lot of urban spaces have the potential too be used for agricultural purposes, but they have not been transformed to do so
Why is predator/prey situation good for both species
Predators rely on prey as their main food source. As the prey is reduced by predators, prey does not have to fight with other prey to maintain their resources in the environment
Why are keystone species important
Keystone species maintain diversity within an environment. They are generally a critical part of the food web because they predators that provide resources to other animals and create balance within an ecosystem
