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uysha [10]
2 years ago
15

In a flock of birds one individual first gives a call when a predator appears. This call is quickly repeated by all members of t

he flock and soon the entire flock is calling at this predator. This activity seems to deter the predator. When this barrage of calls is given the predator always flies away. This is a possible example of ______
Biology
1 answer:
Alisiya [41]2 years ago
6 0

Answer:

The correct answer will be- flock defense

Explanation:

A flock is a group of same species of animals usually observed in the birds during migration.

The flock increases their fitness of survival by avoiding predators in which the one individual of the group gives a call in response to the predator.

The same predator call is repeated by every member of the flock which threatens the predator and the predator goes away. This flock response is considered as the defense response to predator and thus the mechanism is known as flock defense.

Thus, flock defense is the correct answer.

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On the graph below, what would explain why the rabbit population levels drastically increased instead of decreasing drastically?
Ilia_Sergeevich [38]

Based on factors affecting population, the rapid increase in the rabbit population could be dues to high fertility rate, abundance of food and lack of predators.

<h3>What is population increase?</h3>

Population increase refers to the increase in the number if species of an organism found in a given habitat over time.

Increase in population can be brought about by factors such as;

  • abundance of food
  • high fertility rate
  • favorable environmental conditions
  • lack of predators

Therefore, the rapid increase in the rabbit population could be dues to high fertility rate, abundance of food and lack of predators.

Learn more about population increase at: brainly.com/question/2408010

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2 years ago
Which hormone is secreted into the bloodstream by fatty tissue to signal the hypothalamus that the body has had enough food, red
irinina [24]
<span>Leptin, a hormone predominantly made by adipose cells that helps to regulate energy balance by inhibiting hunger, is the hormone secreted into the bloodstream by fatty tissue to signal the hypothalamus that the body has enough food.</span>
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3 years ago
How is a new moon different from a lunar eclipse?
Lubov Fominskaja [6]
The answer is C the moon is between the earth and sun
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What word segment means “muscle”
Vinvika [58]
My(myo) may be is the right one
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Summarize the effects of progesterone and estrogen
SVETLANKA909090 [29]

<u>Definition:</u>

The sex hormone  and endogenous steroid present in human and other species ' menstrual cycle, pregnancy, and embryogenesis are known as "Progesterone" while the primary sex hormone in females  responsible for the development and control of the female reproductive system and for the characteristics of secondary sex is termed as "Estrogen" or "oestrogen".

<u>Progesterone Effects:</u>

  • Progesterone has a variety of physiological effects which are exacerbated when estrogens are present for an instance in breast tissue, where estrogens permits progesterone to mediate lobuloalveolar development.
  • Progesterone has main effects on human sperm by non-genomic signals, as they move through the female tract before fertilization.
  • Progesterone is called "hormone of pregnancy" as transform the endometrium to its secretory stage for uterine implantation, decrease the maternal immune response to permit for the acceptance of the pregnancy during implantation and gestation, prevent preterm labor, inhibits lactation during pregnancy etc.

<u>Estrogen Effects:</u>

  • Effects structure of human and categorize them as male and female, while females have three kind of estrogen: Estrone (weak and found in women after menopause), Estradiol (strong and it is steroid produced by ovaries ) and Estriol (weakest and waste product after body produces estradiol).
  • It effects ovaries, vagina, Fallopian tube, uterus, cervix and mammary glands.
  • It triggers the release of an egg due to high level during halfway of cycle but decreases after ovulation.

<u>Similarities between progesterone and estrogen: </u>

Progesterone and estrogen  as such do not have similar function but work with coordination as both are need for menstrual cycle functioning and regulation. Estrogens usually travel in fluids through the bloodstream, communicate with cells in the body's various tissues, and provide a message or guidance while progesterone helps to balance pregnancy period  and to implant an egg in uterus.

4 0
3 years ago
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