leannamat2106
18.01.2022 •
English
The mother elephant greeted her baby.
Solved
Show answers
More tips
- L Leisure and Entertainment How Many Seasons are There in the TV Show Interns?...
- S Sport When will the Biathlon World Championships 2011 take place in Khanty-Mansiysk? Answers to frequently asked questions...
- H Health and Medicine Trading Semen for Money: Where Can You Sell and Why Would You Want to?...
- F Food and Cooking Homemade French Fries: The Ultimate Guide...
- H Health and Medicine How to Increase Blood Pressure without Medication?...
- S Style and Beauty Choosing a Hair Straightener: Specific Criteria to Consider...
- F Food and Cooking How to Make Polendwitsa at Home?...
- S Science and Technology When do we change our clocks?...
- L Leisure and Entertainment What to Give a Girl on March 8?...
- F Family and Home Is it Worth Knowing the Gender of Your Child Before Birth?...
Answers on questions: English
- E English 1 million √ 4233000 MILLION dollars to the reason why we have to the reason why we have to the reason why we have to the reason why we have to the reason why we have to the...
- E English Ahmed did his homework and anas helped him(convert to simple sentence)...
- E English “The Tiger” by William Blake (1757-1827) biography...
- E English SAT PREP. 1. In the past, coffees were blended to suit a homogenous popular taste, many different coffee flavors are now being produced. for but and SO...
- E English The tomatoes began to after the weather turned cold so we took them inside. *...
- E English im bored if u wanna be friends DM me on twitter 13+ lol i like k/jpop and some anime, drawing and stuff i guess. i love you if u text like this DJFNDJFNDKKFKFKRUFHVBDJT or...
- E English MIXED CONDTIONALS TYPE 4 MIX 3 & 2 – the influence of past into present 1. If I had had more time yesterday I ( not have to do) this today. 2. If she (give) me that book...
- E English The correct use of open body language includes a. open gestures towards seating and menu items.b. crossing your arms to put a barrier between you and the customer.c. doing...
- E English When an author writes about a character in a way that shows the reader what kind of person the character is, the author is using...
- E English Even though they did not take place in the story, which of these situations would fit the story of Beowulf thematically?Beowulf falls in love with a Scylding maiden and leaves...
Ответ:
As the direction of question is not given. I am assuming that the question is asking us to convert the sentence from active voice to passive voice.
Active voice:- The mother elephant greeted her baby.
Passive voice:- The baby was greeted by his/her mother.
Ответ:
The study, published in Science Advances, finds that flightlessness evolved much more frequently among birds than would be expected if you only looked at current species.
Researchers say their findings show how human-driven extinctions have biased our understanding of evolution.
Lead author Dr Ferran Sayol (UCL Centre for Biodiversity & Environment Research and University of Gothenburg, Sweden) said: “Human impacts have substantially altered most ecosystems worldwide, and caused the extinction of hundreds of animal species.
“This can distort evolutionary patterns, especially if the characteristics being studied, such as flightlessness in birds, make species more vulnerable to extinction. We get a biased picture of how evolution really happens.”
For the study, the researchers compiled an exhaustive list of all bird species known to have gone extinct since the rise of humans. They identified 581 bird species that went extinct from the Late Pleistocene (126,000 years ago) to the present, almost all of which were likely due to human influences.
The fossils or other records show that 166 of these extinct species lacked the ability to fly. Only 60 flightless bird species survive today.
Birds that cannot fly were much more diverse than previous studies had assumed, the study shows. The findings also confirm that flightless species were also much more likely to go extinct than species that could fly.
Co-author Professor Tim Blackburn (UCL Centre for Biodiversity & Environment Research and the Institute of Zoology, ZSL) said: “Many bird species can become flightless in environments without their usual predators, for example on islands. Flying expends a lot of energy that birds can use for other purposes if they don’t need to take to the air. Unfortunately, though, this makes them easier prey if humans – and their associated rats and cats – suddenly turn up.
“Extinction has all too often been the result, and is likely to continue as flightless birds are overrepresented, compared to avian species, on global lists of animals under threat.”
The researchers report that most island groups worldwide had flightless birds before humans arrived, occupying ecological niches that otherwise would have been filled by mammals, with particular hotspots in New Zealand (26 species such as the extinct moa) and Hawaii (23 species, all of which are extinct, such as the flightless goose).
Adding extinct birds to the global picture of bird diversity reveals that flightlessness evolved in birds at least four times as often as we would expect if we only looked at living birds.
Dr Sayol said: “Our study shows that the evolution of flightlessness in birds is a widespread phenomenon. Today, most flightless species are penguins, rails or ostriches and their relatives. Now, only 12 bird families have flightless species, but before humans caused extinctions, the number was at least 40. Without those extinctions we would be sharing the planet with flightless owls, woodpeckers and ibises, but all of these have now sadly disappeared.”
The study was funded by Swedish Research Council and Carl Tryggers Stiftelse för Vetenskaplig Forskning, and involved researchers from UCL, ZSL, University of Gothenburg, University of Bayreuth (Germany), and Royal Botanic Gardens, Kew