Because the reproductive success of female Hanuman langurs (Semnopithecus entellus) is almost certainly lowered when a newly installed male kills their young infants, selection should favor countermeasures against infanticidal males. In this light, why might already pregnant females mate with a new male soon after a takeover even though they are not ovulating? What significance do you attach to the discovery that when mares are impregnated by stallions at stables away from their home locations, they will also copulate repeatedly with the males in their home stables upon their return?

Q: Why do females usually have the control in selecting mate and explain sexual dimorphism.

A: All living organisms that undergo sexual reproduction(involving two parents) have two sexes which…

Q: How and why do female mating preferences evolve?

A: Evolution is the progression of life forms that shares the heritable characteristics and lives a…

Q: Which of the following correctly describes hermaphroditism?   A. It is an example of sexual…

A: The biological process through which completely new, distinct organisms known as "offspring" are…

Q: Reproductive modes can be defined based on energetic provisioning (lechithotrophy vs. matritrophy)…

A: Based on the mode of reproduction , animals can be classified. Based on the type of partition…

Q: Why does sexual reproduction present a special problem for burrowing or sessile animals and…

A: Parasites like tapeworms are hermaphrodites in nature i.e., male and female sexual organs in the…

Q: If a genetic female is exposed to extra testosterone during prenatal development, what behavioral…

A: Usually, androgens, like the hormone testosterone, cause reproductive organ defects in females.…

Q: Describe different reproductive technologies, such as conception control, in vitro fertilization,…

A: Reproduction is an important biological mechanism through which new individuals are born from their…

Q: different phases and stages of the estrous cycle

A: The estrous cycle has four stages in particular proestrus, estrus, metestrus and diestrus and goes…

Q: A chemical that prevents acrosomal proteins from interacting with proteins on the egg membrane would…

A: The binding of the sperm to the vitelline envelope of the egg is species-specific.

Q: All of the following are requirements for successful external fertilization except for one. Which…

A: Since there are multiple questions in this particular question I'll answer the first one for you. If…

Q: Which of the following scenarios does NOT describe an event that leads to the conception of twins?…

A: Human reproduction is a sexual reproduction where the sperm from the male fuses with the ovum from…

Q: basal body temperature

A: The body's lowest resting temperature which is typically measured in the morning after waking up is…

Q: Why might the use of female contraceptives actually increase the chances of contracting HIV?

A: HIV is a viral STI, a medication that can control the progression of the HIV virus but cannot treat…

Q: Mammalian sperm don’t live very long after ejaculation.Therefore, for a rhino cow to become…

A: Induced ovulation in animals is done to increase the offspring count to combat the scarcity of…

Q: 1) Explain why the intersex condition supports the idea that sex and gender are non-binary and that…

A: Sex and gender were considered same in the past but in today's world various people are identifying…

Q: Compared with external fertilization, in internal fertilization,a. male gametes have a higher chance…

A: Fertilization  Fertilisation is a process in which the fusion of male and female gametes occurs.…

Q: As described in the Biology and Society section, some species (including some endangered species)…

A: drawbacks might a parthenogenesis program have on the well-being of the species it targets are :

Q: Draw a rough schematic of the placental interface for both invasive (human) and non-invasive (sheep)…

A: Specifically between invasive and non-invasive species, placental architecture might change…

Q: Besides the Warrior gene, the only other genetic mutation directly correlated with “super-maleness”…

A: As mentioned in many scientific literature the warrior gene which is normally referred to as MAOA…

Q: What form of amplexus did you see with the Panamanian Golden frogs?

A: Amplexus  Amplexus is a type of mating behaviour in externally fertilizing animals.

Q: In sea urchin, which step of egg and sperm recognition is mediated by sperm-activating peptides?…

A: Cell division is a process of a parent cell replicating it chromosomal content and dividing itself…

Q: How many gametes does the male produce per day? The female per month? How does this help in the…

A: INTRODUCTION Male gamete : sperm, 200-600 per ejaculation. Female gamete : ovum, one in each month.

Q: We discussed environmental sex determination in reptiles, where the sex of the individual is…

A: The modes of sex determination that fit the category of environmental sex determination are…

Q: All physiological mechanisms are directed towards reproductive success in female. Do you agree with…

A: Reproductive success is a process through the genes can be passed over many generations safely. The…

Q: Please describe the role of estradiol, prolactin, luteinizing hormone, progesterone and inhibin in…

A:

Q: Which of these is an example of asexual reproduction?     A hermaphrodite mating with another…

A: Reproduction is the biological process of self perpetuation race in which new organisms are produced…

Q: male and female reproductive

A: The tissues, glands, and organs involved in producing offspring is called reproductive system. In…

Q: Pandas have become specifically adapted to bamboo forests because they depend on the bamboo for…

A: Giant pandas have developed unique adaptations for their cold, wet habitat and their penchant for…

Q: What is NOT a disadvantage of internal fertilization? O the ability to reproduce on land without…

A: Step 1 Internal fertilization is syngamy or fertilization that occurs inside the body of the…

Q: Shown here are graphs that plot the percentage of fertilizedeggs containing males against the…

A: Temperature-dependent sex determination (TSD) is a means of non-genetic sex determination in some of…

Q: What is evidence that menopause is an adaptive cooperative trait? In humans, the presence of…

A: Introduction When you have gone 12 months without a monthly period, menopause has set in. Hot…

Q: A male and female mouse are mated. The graph below illustrates serum progesterone levels in the…

A: The term "progestin" refers to any chemical that induces some or all of the physiologic actions of…

Q: If you add a chemical to an egg cell that prevents the fast and slow blocks from occurring but does…

A: The fast block to polyspermy can be accomplished by altering the electric potential of the egg…

Q: steroid hormones

A: These hormones play crucial roles in the female reproductive system. The primary steroid hormones in…

Q: In some species, sex is determined by environmental, rather than genetic, factors. This is true of:…

A: The determination of sex in organisms is a crucial aspect of their reproduction, and there are…

Q: According to the sexy son hypothesis, females select mates with extreme secondary sexual traits…

A: The sexy sons hypothesis suggests that females choose mates with attractive traits because they…