All mammals feed their young. Belug

All mammals feed their young. Beluga whale mothers, for example, nurse their calves for some twenty months, until they are about to give birth again and their young are able to find their own food. The behavior of feeding of the young is built into the reproductive system. It is a non-elective part of parental care and the defining feature of a mammal, the most important thing that mammals-- whether marsupials, platypuses, spiny anteaters, or placental mammals -- have in common.
But not all animal parents, even those that tend their offspring to the point of hatching or birth, feed their young. Most egg-guarding fish do not, for the simple reason that their young are so much smaller than the parents and eat food that is also much smaller than the food eaten by adults. In reptiles, the crocodile mother protects her young after they have hatched and takes them down to the water, where they will find food, but she does not actually feed them. Few insects feed their young after hatching, but some make other arrangement, provisioning their cells and nests with caterpillars and spiders that they have paralyzed with their venom and stored in a state of suspended animation so that their larvae might have a supply of fresh food when they hatch.
For animals other than mammals, then, feeding is not intrinsic to parental care. Animals add it to their reproductive strategies to give them an edge in their lifelong quest for descendants. The most vulnerable moment in any animal's life is when it first finds itself completely on its own, when it must forage and fend for itself. Feeding postpones that moment until a young animal has grown to such a size that it is better able to cope. Young that are fed by their parents become nutritionally independent at a much greater fraction of their full adult size. And in the meantime those young are shielded against the vagaries of fluctuating of difficult-to-find supplies. Once a species does take the step of feeding its young, the young become totally dependent on the extra effort. If both parents are removed, the young generally do not survive.
Câu 61: What does the passage mainly discuss?
A. The care that various animals give to their offspring.
B. The difficulties young animals face in obtaining food.
C. The methods that mammals use to nurse their young.
D. The importance among young mammals of becoming independent.
Câu 62: The author lists various animals in paragraph 1 to
A. contrast the feeding habits of different types of mammals.
B. describe the process by which mammals came to be defined.
C. emphasize the point that every type of mammal feeds its own young.
D. explain why a particular feature of mammals is non-elective.
Câu 63: The word "tend" is closest in meaning to ..
A. sit on B. move C. notice D. care for
Câu 64: What can be inferred from the passage about the practice of animal parents feeding their young?
A. It is unknown among fish. B. It is unrelated to the size of the young.
C. It is dangerous for the parents. D. It is most common among mammals.
Câu 65: The word "provisioning" is closest in meaning to
A. supplying B. preparing C. building D. expanding
Câu 66: According to the passage, how do some insects make sure their young have food?
A. By storing food near their young.
B. By locating their nests or cells near spiders and caterpillars.
C. By searching for food some distance from their nest.
D. By gathering food from a nearby water source.
Câu 67: The word "edge" is closest in meaning to
A. opportunity B. advantage C. purpose D. rest
Câu 68: The word "it" refers to
A. Feeding B. moment C. young animal D. size
Câu 69: According to the passage, animal young are most defenseless when
A. their parents are away searching for food. B. their parents have many young to feed.
C. they are only a few days old. D. they first become independent.
Câu 70: The word "shielded" is closest in meaning to .
A. raised B. protected C. hatched D. valued

Kết quả (Việt) 1:

Tất cả động vật có vú nuôi trẻ của họ. Các bà mẹ cá voi Beluga, ví dụ, y tá con bê của họ cho một vài tháng hai mươi, cho đến khi họ đang cung cấp cho sinh một lần nữa và trẻ của họ có thể tìm thấy thực phẩm riêng của họ. Hành vi của ăn của trẻ được xây dựng vào hệ thống sinh sản. Nó là một phần elective chăm sóc của cha mẹ và các tính năng xác định của một động vật có vú, điều quan trọng nhất là động vật có vú--cho dù loài thú có túi, Platypus, spiny anteaters hoặc động vật có vú nhau thai--có điểm chung.Nhưng không phải tất cả phụ huynh động vật, ngay cả những người có xu hướng con cái của họ đến khi nở hay khi sinh ra, nuôi trẻ của họ. Hầu hết bảo vệ trứng cá không, vì lý do đơn giản mà trẻ của họ có rất nhiều nhỏ hơn so với các bậc cha mẹ và ăn thức ăn cũng là nhỏ hơn nhiều so với các thực phẩm ăn của người lớn. Ở loài bò sát, cá sấu mẹ bảo vệ trẻ của mình sau khi họ đã nở và đưa họ xuống nước, nơi họ sẽ tìm thấy thực phẩm, nhưng cô không thực sự ăn chúng. Vài loài côn trùng ăn trẻ của họ sau khi nở, nhưng một số làm cho sự sắp xếp khác, cung cấp các tế bào của họ và các tổ với sâu bướm và nhện họ đã tê liệt với nọc độc của họ và được lưu trữ trong tình trạng bị treo hoạt hình ấu trùng của chúng có thể có một nguồn cung cấp thực phẩm tươi sống khi chúng nở.For animals other than mammals, then, feeding is not intrinsic to parental care. Animals add it to their reproductive strategies to give them an edge in their lifelong quest for descendants. The most vulnerable moment in any animal's life is when it first finds itself completely on its own, when it must forage and fend for itself. Feeding postpones that moment until a young animal has grown to such a size that it is better able to cope. Young that are fed by their parents become nutritionally independent at a much greater fraction of their full adult size. And in the meantime those young are shielded against the vagaries of fluctuating of difficult-to-find supplies. Once a species does take the step of feeding its young, the young become totally dependent on the extra effort. If both parents are removed, the young generally do not survive.Câu 61: What does the passage mainly discuss?A. The care that various animals give to their offspring.B. The difficulties young animals face in obtaining food.C. The methods that mammals use to nurse their young.D. The importance among young mammals of becoming independent.Câu 62: The author lists various animals in paragraph 1 to A. contrast the feeding habits of different types of mammals.B. describe the process by which mammals came to be defined.C. emphasize the point that every type of mammal feeds its own young.D. explain why a particular feature of mammals is non-elective.Câu 63: The word "tend" is closest in meaning to ..A. sit on B. move C. notice D. care forCâu 64: What can be inferred from the passage about the practice of animal parents feeding their young?A. It is unknown among fish. B. It is unrelated to the size of the young.C. It is dangerous for the parents. D. It is most common among mammals.Câu 65: The word "provisioning" is closest in meaning to A. supplying B. preparing C. building D. expandingCâu 66: According to the passage, how do some insects make sure their young have food?A. By storing food near their young.B. By locating their nests or cells near spiders and caterpillars.C. By searching for food some distance from their nest.D. By gathering food from a nearby water source.Câu 67: The word "edge" is closest in meaning to A. opportunity B. advantage C. purpose D. restCâu 68: The word "it" refers to A. Feeding B. moment C. young animal D. sizeCâu 69: According to the passage, animal young are most defenseless whenA. their parents are away searching for food. B. their parents have many young to feed.C. they are only a few days old. D. they first become independent.Câu 70: The word "shielded" is closest in meaning to .A. raised B. protected C. hatched D. valued