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3 years ago

What kind of organisms can cause a contagious disease?

Biology

2 answers:

34kurt3 years ago

8 0

Bacteria poison mushrooms fungi

Sindrei [870]3 years ago

5 0

<span>I believe these are the most common organism that can cause a contagious disease viruses, bacteria, fungi, and worms. Hope this helps. </span>(ﾉ◕ヮ◕)ﾉ*:･ﾟ✧

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The diagram shows a simple lipid.

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Phospholipid is the answer

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3 years ago

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Which of following is true about sexual reproduction?

igor_vitrenko [27]

Haploid cells formed by meiosis combine to produce a diploid cell.

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2 years ago

WORTH 90 POINTS!!

Arisa [49]

1. B. They have the same niche in different habitats.

Both the tahrs and the mountain goats are two species that occupy the same niche known as the alpine vegetation zone. However, they live in different habitats: the tahrs in the Himalaya Mountains and the Mountain goats in Yellowstone National Park.

2. B. lappet-faced vultures only

The lappet-faced vultures is a very large Old World vulture that has a scavenger lifestyle, feeding mostly on animal carcasses.

Fennec foxes are nocturnal hunters (secondary consumers), fat sand rats have a typical rodent diet (primary consumers) and barrel cacti are primary producers.

3. D. northern cardinals – (is it the same habitat as the one in the northern cardinal picture?)

The bird in the attached picture is a northern cardinal. They live in woodlands, shrublands, wetlands and gardens from southern Canada in the north, to Mexico, Belize, Guatemala, etc. in the south.

4. B. builds cup-shaped nests in small trees

The northern cardinal is a mid-sized songbird that builds cup-shaped nests from twigs, grapevine bark, grasses etc. in small trees.

5. D. ground of temperate deciduous forest

Black bears are primarily found in forested areas with thick ground vegetation. These provide an abundance of fruits, nuts, roots etc.

6. B. canopy in a rainforest

The two-toed sloth can be found in the rainforests of Central and South America.

7. B. a unique environment in which an organism lives

A habitat is the natural environment in which a population or species normally lives.

8. A. only one

Due to the Gause’s Principle, two species or populations that compete for the exact same resources (niche) cannot coexist because one is more likely to be more successful. Although sometimes it may appear different, upon closer study it has been shown that two apparently coexisting species occupy slightly different niches.

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4 years ago

What is the role of DNA polymerase in DNA Replication?

Nadya [2.5K]

Answer:

Explanation:

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3 years ago

Beginning with the flow phase, arrange the biochemical processes in the order in which they occur during the menstrual cycle.

Svet_ta [14]

The right order are :

6. High progesterone levels ...

4. The endometrium lining breaks down ...

1. FSH and LH stimulates ...

5. Rising estrogen levels suppress FSH production ...

3. A spike in LH causes follicle to rupture.

2. A breakdown of corpus luteum ...

The menstrual cycle is divided into 2 phases:

Phase 1: the estrogenic or follicular phase (14 days)

The ovarian follicules each house an egg. They continue to grow thanks to the hormone FSH (follicle stimulating hormone) secreted by the pituitary gland, a gland at the base of the brain. But in the end, only one follicle matures. The others will then disappear.

The ovaries produce estrogen that will allow the endometrium to thicken to accommodate an egg in case of fertilization.

The estrogen level gradually increases in the blood and triggers the sudden release of luteinizing hormone (LH), which has been secreted and stored by the pituitary gland. Under the action of this hormone, the dominant follicle breaks and delivers an egg: it is the moment of ovulation.

The oocyte initiates the descent of the fallopian tube to the uterus for 3 or 4 days. It is fecundable for about 24 hours. Then, and if he has not met sperm, he degenerates.

Phase 2: the progesterone or luteal phase

The second phase of the menstrual cycle begins after ovulation and lasts 2 weeks.

Under the action of the LH, the follicle that released the egg turns into a yellow body. This temporary cell structure produces estrogen and a large amount of progesterone. This hormone acts on the thickening of the uterine lining, which is enriched with nutrients.

Progesterone production peaks about 8 days after ovulation and then declines as the pituitary stops secreting LH. The corpus luteum deteriorates around the 23rd day, until the 28th day. This also causes a drop in estrogen levels.

This hormonal variation influences the state of the endometrium. As it does not receive so much blood and oxygen, the upper wall of the mucosa gradually degenerates and is evacuated by the vagina in the form of bleeding, what is called menstruations.

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3 years ago